some progress

node_modules/sift/MIT-LICENSE.txt

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+Copyright (c) 2015 Craig Condon
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

node_modules/sift/README.md

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+**Installation**: `npm install sift`, or `yarn add sift`
+
+## Sift is a tiny library for using MongoDB queries in Javascript
+
+[![Build Status](https://secure.travis-ci.org/crcn/sift.js.png)](https://secure.travis-ci.org/crcn/sift.js)
+
+<!-- [![Coverage Status](https://coveralls.io/repos/crcn/sift.js/badge.svg)](https://coveralls.io/r/crcn/sift.js)  -->
+<!-- [![Join the chat at https://gitter.im/crcn/sift.js](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/crcn/sift.js?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge) -->
+
+**For extended documentation, checkout http://docs.mongodb.org/manual/reference/operator/query/**
+
+## Features:
+
+- Supported operators: [\$in](#in), [\$nin](#nin), [\$exists](#exists), [\$gte](#gte), [\$gt](#gt), [\$lte](#lte), [\$lt](#lt), [\$eq](#eq), [\$ne](#ne), [\$mod](#mod), [\$all](#all), [\$and](#and), [\$or](#or), [\$nor](#nor), [\$not](#not), [\$size](#size), [\$type](#type), [\$regex](#regex), [\$where](#where), [\$elemMatch](#elemmatch)
+- Regexp searches
+- Supports node.js, and web
+- Custom Operations
+- Tree-shaking (omitting functionality from web app bundles)
+
+## Examples
+
+```javascript
+import sift from "sift";
+
+//intersecting arrays
+const result1 = ["hello", "sifted", "array!"].filter(
+  sift({ $in: ["hello", "world"] })
+); //['hello']
+
+//regexp filter
+const result2 = ["craig", "john", "jake"].filter(sift(/^j/)); //['john','jake']
+
+// function filter
+const testFilter = sift({
+  //you can also filter against functions
+  name: function(value) {
+    return value.length == 5;
+  }
+});
+
+const result3 = [
+  {
+    name: "craig"
+  },
+  {
+    name: "john"
+  },
+  {
+    name: "jake"
+  }
+].filter(testFilter); // filtered: [{ name: 'craig' }]
+
+//you can test *single values* against your custom sifter
+testFilter({ name: "sarah" }); //true
+testFilter({ name: "tim" }); //false
+```
+
+## API
+
+### sift(query: MongoQuery, options?: Options): Function
+
+Creates a filter with all of the built-in MongoDB query operations.
+
+- `query` - the filter to use against the target array
+- `options`
+  - `operations` - [custom operations](#custom-operations)
+  - `compare` - compares difference between two values
+
+Example:
+
+```javascript
+import sift from "sift";
+
+const test = sift({ $gt: 5 }));
+
+console.log(test(6)); // true
+console.log(test(4)); // false
+
+[3, 4, 5, 6, 7].filter(sift({ $exists: true })); // [6, 7]
+```
+
+### createQueryTester(query: Query, options?: Options): Function
+
+Creates a filter function **without** built-in MongoDB query operations. This is useful
+if you're looking to omit certain operations from application bundles. See [Omitting built-in operations](#omitting-built-in-operations) for more info.
+
+```javascript
+import { createQueryTester, $eq, $in } from "sift";
+const filter = createQueryTester({ $eq: 5 }, { operations: { $eq, $in } });
+```
+
+### createEqualsOperation(params: any, ownerQuery: Query, options: Options): Operation
+
+Used for [custom operations](#custom-operations).
+
+```javascript
+import { createQueryTester, createEqualsOperation, $eq, $in } from "sift";
+const filter = createQueryTester(
+  { $mod: 5 },
+  {
+    operations: {
+      $something(mod, ownerQuery, options) {
+        return createEqualsOperation(
+          value => value % mod === 0,
+          ownerQuery,
+          options
+        );
+      }
+    }
+  }
+);
+filter(10); // true
+filter(11); // false
+```
+
+## Supported Operators
+
+See MongoDB's [advanced queries](http://www.mongodb.org/display/DOCS/Advanced+Queries) for more info.
+
+### \$in
+
+array value must be _\$in_ the given query:
+
+Intersecting two arrays:
+
+```javascript
+//filtered: ['Brazil']
+["Brazil", "Haiti", "Peru", "Chile"].filter(
+  sift({ $in: ["Costa Rica", "Brazil"] })
+);
+```
+
+Here's another example. This acts more like the \$or operator:
+
+```javascript
+[{ name: "Craig", location: "Brazil" }].filter(
+  sift({ location: { $in: ["Costa Rica", "Brazil"] } })
+);
+```
+
+### \$nin
+
+Opposite of \$in:
+
+```javascript
+//filtered: ['Haiti','Peru','Chile']
+["Brazil", "Haiti", "Peru", "Chile"].filter(
+  sift({ $nin: ["Costa Rica", "Brazil"] })
+);
+```
+
+### \$exists
+
+Checks if whether a value exists:
+
+```javascript
+//filtered: ['Craig','Tim']
+sift({ $exists: true })(["Craig", null, "Tim"]);
+```
+
+You can also filter out values that don't exist
+
+```javascript
+//filtered: [{ name: "Tim" }]
+[{ name: "Craig", city: "Minneapolis" }, { name: "Tim" }].filter(
+  sift({ city: { $exists: false } })
+);
+```
+
+### \$gte
+
+Checks if a number is >= value:
+
+```javascript
+//filtered: [2, 3]
+[0, 1, 2, 3].filter(sift({ $gte: 2 }));
+```
+
+### \$gt
+
+Checks if a number is > value:
+
+```javascript
+//filtered: [3]
+[0, 1, 2, 3].filter(sift({ $gt: 2 }));
+```
+
+### \$lte
+
+Checks if a number is <= value.
+
+```javascript
+//filtered: [0, 1, 2]
+[0, 1, 2, 3].filter(sift({ $lte: 2 }));
+```
+
+### \$lt
+
+Checks if number is < value.
+
+```javascript
+//filtered: [0, 1]
+[0, 1, 2, 3].filter(sift({ $lt: 2 }));
+```
+
+### \$eq
+
+Checks if `query === value`. Note that **\$eq can be omitted**. For **\$eq**, and **\$ne**
+
+```javascript
+//filtered: [{ state: 'MN' }]
+[{ state: "MN" }, { state: "CA" }, { state: "WI" }].filter(
+  sift({ state: { $eq: "MN" } })
+);
+```
+
+Or:
+
+```javascript
+//filtered: [{ state: 'MN' }]
+[{ state: "MN" }, { state: "CA" }, { state: "WI" }].filter(
+  sift({ state: "MN" })
+);
+```
+
+### \$ne
+
+Checks if `query !== value`.
+
+```javascript
+//filtered: [{ state: 'CA' }, { state: 'WI'}]
+[{ state: "MN" }, { state: "CA" }, { state: "WI" }].filter(
+  sift({ state: { $ne: "MN" } })
+);
+```
+
+### \$mod
+
+Modulus:
+
+```javascript
+//filtered: [300, 600]
+[100, 200, 300, 400, 500, 600].filter(sift({ $mod: [3, 0] }));
+```
+
+### \$all
+
+values must match **everything** in array:
+
+```javascript
+//filtered: [ { tags: ['books','programming','travel' ]} ]
+[
+  { tags: ["books", "programming", "travel"] },
+  { tags: ["travel", "cooking"] }
+].filter(sift({ tags: { $all: ["books", "programming"] } }));
+```
+
+### \$and
+
+ability to use an array of expressions. All expressions must test true.
+
+```javascript
+//filtered: [ { name: 'Craig', state: 'MN' }]
+
+[
+  { name: "Craig", state: "MN" },
+  { name: "Tim", state: "MN" },
+  { name: "Joe", state: "CA" }
+].filter(sift({ $and: [{ name: "Craig" }, { state: "MN" }] }));
+```
+
+### \$or
+
+OR array of expressions.
+
+```javascript
+//filtered: [ { name: 'Craig', state: 'MN' }, { name: 'Tim', state: 'MN' }]
+[
+  { name: "Craig", state: "MN" },
+  { name: "Tim", state: "MN" },
+  { name: "Joe", state: "CA" }
+].filter(sift({ $or: [{ name: "Craig" }, { state: "MN" }] }));
+```
+
+### \$nor
+
+opposite of or:
+
+```javascript
+//filtered: [{ name: 'Joe', state: 'CA' }]
+[
+  { name: "Craig", state: "MN" },
+  { name: "Tim", state: "MN" },
+  { name: "Joe", state: "CA" }
+].filter(sift({ $nor: [{ name: "Craig" }, { state: "MN" }] }));
+```
+
+### \$size
+
+Matches an array - must match given size:
+
+```javascript
+//filtered: ['food','cooking']
+[{ tags: ["food", "cooking"] }, { tags: ["traveling"] }].filter(
+  sift({ tags: { $size: 2 } })
+);
+```
+
+### \$type
+
+Matches a values based on the type
+
+```javascript
+[new Date(), 4342, "hello world"].filter(sift({ $type: Date })); //returns single date
+[new Date(), 4342, "hello world"].filter(sift({ $type: String })); //returns ['hello world']
+```
+
+### \$regex
+
+Matches values based on the given regular expression
+
+```javascript
+["frank", "fred", "sam", "frost"].filter(
+  sift({ $regex: /^f/i, $nin: ["frank"] })
+); // ["fred", "frost"]
+["frank", "fred", "sam", "frost"].filter(
+  sift({ $regex: "^f", $options: "i", $nin: ["frank"] })
+); // ["fred", "frost"]
+```
+
+### \$where
+
+Matches based on some javascript comparison
+
+```javascript
+[{ name: "frank" }, { name: "joe" }].filter(
+  sift({ $where: "this.name === 'frank'" })
+); // ["frank"]
+[{ name: "frank" }, { name: "joe" }].filter(
+  sift({
+    $where: function() {
+      return this.name === "frank";
+    }
+  })
+); // ["frank"]
+```
+
+### \$elemMatch
+
+Matches elements of array
+
+```javascript
+var bills = [
+  {
+    month: "july",
+    casts: [
+      {
+        id: 1,
+        value: 200
+      },
+      {
+        id: 2,
+        value: 1000
+      }
+    ]
+  },
+  {
+    month: "august",
+    casts: [
+      {
+        id: 3,
+        value: 1000
+      },
+      {
+        id: 4,
+        value: 4000
+      }
+    ]
+  }
+];
+
+var result = bills.filter(
+  sift({
+    casts: {
+      $elemMatch: {
+        value: { $gt: 1000 }
+      }
+    }
+  })
+); // {month:'august', casts:[{id:3, value: 1000},{id: 4, value: 4000}]}
+```
+
+### \$not
+
+Not expression:
+
+```javascript
+["craig", "tim", "jake"].filter(sift({ $not: { $in: ["craig", "tim"] } })); //['jake']
+["craig", "tim", "jake"].filter(sift({ $not: { $size: 5 } })); //['tim','jake']
+```
+
+### Date comparison
+
+Mongodb allows you to do date comparisons like so:
+
+```javascript
+db.collection.find({ createdAt: { $gte: "2018-03-22T06:00:00Z" } });
+```
+
+In Sift, you'll need to specify a Date object:
+
+```javascript
+collection.find(
+  sift({ createdAt: { $gte: new Date("2018-03-22T06:00:00Z") } })
+);
+```
+
+## Custom behavior
+
+Sift works like MongoDB out of the box, but you're also able to modify the behavior to suite your needs.
+
+#### Custom operations
+
+You can register your own custom operations. Here's an example:
+
+```javascript
+import sift, { createEqualsOperation } from "sift";
+
+var filter = sift(
+  {
+    $customMod: 2
+  },
+  {
+    operations: {
+      $customMod(params, ownerQuery, options) {
+        return createEqualsOperation(
+          value => value % params !== 0,
+          ownerQuery,
+          options
+        );
+      }
+    }
+  }
+);
+
+[1, 2, 3, 4, 5].filter(filter); // 1, 3, 5
+```
+
+#### Omitting built-in operations
+
+You can create a filter function that omits the built-in operations like so:
+
+```javascript
+import { createQueryTester, $in, $all, $nin, $lt } from "sift";
+const test = createQueryTester(
+  {
+    $eq: 10
+  },
+  { operations: { $in, $all, $nin, $lt } }
+);
+
+[1, 2, 3, 4, 10].filter(test);
+```
+
+For bundlers like `Webpack` and `Rollup`, operations that aren't used are omitted from application bundles via tree-shaking.

node_modules/sift/es/index.js

@@ -0,0 +1,626 @@
+const typeChecker = (type) => {
+    const typeString = "[object " + type + "]";
+    return function (value) {
+        return getClassName(value) === typeString;
+    };
+};
+const getClassName = value => Object.prototype.toString.call(value);
+const comparable = (value) => {
+    if (value instanceof Date) {
+        return value.getTime();
+    }
+    else if (isArray(value)) {
+        return value.map(comparable);
+    }
+    else if (value && typeof value.toJSON === "function") {
+        return value.toJSON();
+    }
+    return value;
+};
+const isArray = typeChecker("Array");
+const isObject = typeChecker("Object");
+const isFunction = typeChecker("Function");
+const isVanillaObject = value => {
+    return (value &&
+        (value.constructor === Object ||
+            value.constructor === Array ||
+            value.constructor.toString() === "function Object() { [native code] }" ||
+            value.constructor.toString() === "function Array() { [native code] }") &&
+        !value.toJSON);
+};
+const equals = (a, b) => {
+    if (a == null && a == b) {
+        return true;
+    }
+    if (a === b) {
+        return true;
+    }
+    if (Object.prototype.toString.call(a) !== Object.prototype.toString.call(b)) {
+        return false;
+    }
+    if (isArray(a)) {
+        if (a.length !== b.length) {
+            return false;
+        }
+        for (let i = 0, { length } = a; i < length; i++) {
+            if (!equals(a[i], b[i]))
+                return false;
+        }
+        return true;
+    }
+    else if (isObject(a)) {
+        if (Object.keys(a).length !== Object.keys(b).length) {
+            return false;
+        }
+        for (const key in a) {
+            if (!equals(a[key], b[key]))
+                return false;
+        }
+        return true;
+    }
+    return false;
+};
+
+/**
+ * Walks through each value given the context - used for nested operations. E.g:
+ * { "person.address": { $eq: "blarg" }}
+ */
+const walkKeyPathValues = (item, keyPath, next, depth, key, owner) => {
+    const currentKey = keyPath[depth];
+    // if array, then try matching. Might fall through for cases like:
+    // { $eq: [1, 2, 3] }, [ 1, 2, 3 ].
+    if (isArray(item) && isNaN(Number(currentKey))) {
+        for (let i = 0, { length } = item; i < length; i++) {
+            // if FALSE is returned, then terminate walker. For operations, this simply
+            // means that the search critera was met.
+            if (!walkKeyPathValues(item[i], keyPath, next, depth, i, item)) {
+                return false;
+            }
+        }
+    }
+    if (depth === keyPath.length || item == null) {
+        return next(item, key, owner, depth === 0);
+    }
+    return walkKeyPathValues(item[currentKey], keyPath, next, depth + 1, currentKey, item);
+};
+class BaseOperation {
+    constructor(params, owneryQuery, options, name) {
+        this.params = params;
+        this.owneryQuery = owneryQuery;
+        this.options = options;
+        this.name = name;
+        this.init();
+    }
+    init() { }
+    reset() {
+        this.done = false;
+        this.keep = false;
+    }
+}
+class GroupOperation extends BaseOperation {
+    constructor(params, owneryQuery, options, children) {
+        super(params, owneryQuery, options);
+        this.children = children;
+    }
+    /**
+     */
+    reset() {
+        this.keep = false;
+        this.done = false;
+        for (let i = 0, { length } = this.children; i < length; i++) {
+            this.children[i].reset();
+        }
+    }
+    /**
+     */
+    childrenNext(item, key, owner, root) {
+        let done = true;
+        let keep = true;
+        for (let i = 0, { length } = this.children; i < length; i++) {
+            const childOperation = this.children[i];
+            if (!childOperation.done) {
+                childOperation.next(item, key, owner, root);
+            }
+            if (!childOperation.keep) {
+                keep = false;
+            }
+            if (childOperation.done) {
+                if (!childOperation.keep) {
+                    break;
+                }
+            }
+            else {
+                done = false;
+            }
+        }
+        this.done = done;
+        this.keep = keep;
+    }
+}
+class NamedGroupOperation extends GroupOperation {
+    constructor(params, owneryQuery, options, children, name) {
+        super(params, owneryQuery, options, children);
+        this.name = name;
+    }
+}
+class QueryOperation extends GroupOperation {
+    constructor() {
+        super(...arguments);
+        this.propop = true;
+    }
+    /**
+     */
+    next(item, key, parent, root) {
+        this.childrenNext(item, key, parent, root);
+    }
+}
+class NestedOperation extends GroupOperation {
+    constructor(keyPath, params, owneryQuery, options, children) {
+        super(params, owneryQuery, options, children);
+        this.keyPath = keyPath;
+        this.propop = true;
+        /**
+         */
+        this._nextNestedValue = (value, key, owner, root) => {
+            this.childrenNext(value, key, owner, root);
+            return !this.done;
+        };
+    }
+    /**
+     */
+    next(item, key, parent) {
+        walkKeyPathValues(item, this.keyPath, this._nextNestedValue, 0, key, parent);
+    }
+}
+const createTester = (a, compare) => {
+    if (a instanceof Function) {
+        return a;
+    }
+    if (a instanceof RegExp) {
+        return b => {
+            const result = typeof b === "string" && a.test(b);
+            a.lastIndex = 0;
+            return result;
+        };
+    }
+    const comparableA = comparable(a);
+    return b => compare(comparableA, comparable(b));
+};
+class EqualsOperation extends BaseOperation {
+    constructor() {
+        super(...arguments);
+        this.propop = true;
+    }
+    init() {
+        this._test = createTester(this.params, this.options.compare);
+    }
+    next(item, key, parent) {
+        if (!Array.isArray(parent) || parent.hasOwnProperty(key)) {
+            if (this._test(item, key, parent)) {
+                this.done = true;
+                this.keep = true;
+            }
+        }
+    }
+}
+const createEqualsOperation = (params, owneryQuery, options) => new EqualsOperation(params, owneryQuery, options);
+class NopeOperation extends BaseOperation {
+    constructor() {
+        super(...arguments);
+        this.propop = true;
+    }
+    next() {
+        this.done = true;
+        this.keep = false;
+    }
+}
+const numericalOperationCreator = (createNumericalOperation) => (params, owneryQuery, options, name) => {
+    if (params == null) {
+        return new NopeOperation(params, owneryQuery, options, name);
+    }
+    return createNumericalOperation(params, owneryQuery, options, name);
+};
+const numericalOperation = (createTester) => numericalOperationCreator((params, owneryQuery, options, name) => {
+    const typeofParams = typeof comparable(params);
+    const test = createTester(params);
+    return new EqualsOperation(b => {
+        return typeof comparable(b) === typeofParams && test(b);
+    }, owneryQuery, options, name);
+});
+const createNamedOperation = (name, params, parentQuery, options) => {
+    const operationCreator = options.operations[name];
+    if (!operationCreator) {
+        throwUnsupportedOperation(name);
+    }
+    return operationCreator(params, parentQuery, options, name);
+};
+const throwUnsupportedOperation = (name) => {
+    throw new Error(`Unsupported operation: ${name}`);
+};
+const containsOperation = (query, options) => {
+    for (const key in query) {
+        if (options.operations.hasOwnProperty(key) || key.charAt(0) === "$")
+            return true;
+    }
+    return false;
+};
+const createNestedOperation = (keyPath, nestedQuery, parentKey, owneryQuery, options) => {
+    if (containsOperation(nestedQuery, options)) {
+        const [selfOperations, nestedOperations] = createQueryOperations(nestedQuery, parentKey, options);
+        if (nestedOperations.length) {
+            throw new Error(`Property queries must contain only operations, or exact objects.`);
+        }
+        return new NestedOperation(keyPath, nestedQuery, owneryQuery, options, selfOperations);
+    }
+    return new NestedOperation(keyPath, nestedQuery, owneryQuery, options, [
+        new EqualsOperation(nestedQuery, owneryQuery, options)
+    ]);
+};
+const createQueryOperation = (query, owneryQuery = null, { compare, operations } = {}) => {
+    const options = {
+        compare: compare || equals,
+        operations: Object.assign({}, operations || {})
+    };
+    const [selfOperations, nestedOperations] = createQueryOperations(query, null, options);
+    const ops = [];
+    if (selfOperations.length) {
+        ops.push(new NestedOperation([], query, owneryQuery, options, selfOperations));
+    }
+    ops.push(...nestedOperations);
+    if (ops.length === 1) {
+        return ops[0];
+    }
+    return new QueryOperation(query, owneryQuery, options, ops);
+};
+const createQueryOperations = (query, parentKey, options) => {
+    const selfOperations = [];
+    const nestedOperations = [];
+    if (!isVanillaObject(query)) {
+        selfOperations.push(new EqualsOperation(query, query, options));
+        return [selfOperations, nestedOperations];
+    }
+    for (const key in query) {
+        if (options.operations.hasOwnProperty(key)) {
+            const op = createNamedOperation(key, query[key], query, options);
+            if (op) {
+                if (!op.propop && parentKey && !options.operations[parentKey]) {
+                    throw new Error(`Malformed query. ${key} cannot be matched against property.`);
+                }
+            }
+            // probably just a flag for another operation (like $options)
+            if (op != null) {
+                selfOperations.push(op);
+            }
+        }
+        else if (key.charAt(0) === "$") {
+            throwUnsupportedOperation(key);
+        }
+        else {
+            nestedOperations.push(createNestedOperation(key.split("."), query[key], key, query, options));
+        }
+    }
+    return [selfOperations, nestedOperations];
+};
+const createOperationTester = (operation) => (item, key, owner) => {
+    operation.reset();
+    operation.next(item, key, owner);
+    return operation.keep;
+};
+const createQueryTester = (query, options = {}) => {
+    return createOperationTester(createQueryOperation(query, null, options));
+};
+
+class $Ne extends BaseOperation {
+    constructor() {
+        super(...arguments);
+        this.propop = true;
+    }
+    init() {
+        this._test = createTester(this.params, this.options.compare);
+    }
+    reset() {
+        super.reset();
+        this.keep = true;
+    }
+    next(item) {
+        if (this._test(item)) {
+            this.done = true;
+            this.keep = false;
+        }
+    }
+}
+// https://docs.mongodb.com/manual/reference/operator/query/elemMatch/
+class $ElemMatch extends BaseOperation {
+    constructor() {
+        super(...arguments);
+        this.propop = true;
+    }
+    init() {
+        if (!this.params || typeof this.params !== "object") {
+            throw new Error(`Malformed query. $elemMatch must by an object.`);
+        }
+        this._queryOperation = createQueryOperation(this.params, this.owneryQuery, this.options);
+    }
+    reset() {
+        super.reset();
+        this._queryOperation.reset();
+    }
+    next(item) {
+        if (isArray(item)) {
+            for (let i = 0, { length } = item; i < length; i++) {
+                // reset query operation since item being tested needs to pass _all_ query
+                // operations for it to be a success
+                this._queryOperation.reset();
+                const child = item[i];
+                this._queryOperation.next(child, i, item, false);
+                this.keep = this.keep || this._queryOperation.keep;
+            }
+            this.done = true;
+        }
+        else {
+            this.done = false;
+            this.keep = false;
+        }
+    }
+}
+class $Not extends BaseOperation {
+    constructor() {
+        super(...arguments);
+        this.propop = true;
+    }
+    init() {
+        this._queryOperation = createQueryOperation(this.params, this.owneryQuery, this.options);
+    }
+    reset() {
+        super.reset();
+        this._queryOperation.reset();
+    }
+    next(item, key, owner, root) {
+        this._queryOperation.next(item, key, owner, root);
+        this.done = this._queryOperation.done;
+        this.keep = !this._queryOperation.keep;
+    }
+}
+class $Size extends BaseOperation {
+    constructor() {
+        super(...arguments);
+        this.propop = true;
+    }
+    init() { }
+    next(item) {
+        if (isArray(item) && item.length === this.params) {
+            this.done = true;
+            this.keep = true;
+        }
+        // if (parent && parent.length === this.params) {
+        //   this.done = true;
+        //   this.keep = true;
+        // }
+    }
+}
+const assertGroupNotEmpty = (values) => {
+    if (values.length === 0) {
+        throw new Error(`$and/$or/$nor must be a nonempty array`);
+    }
+};
+class $Or extends BaseOperation {
+    constructor() {
+        super(...arguments);
+        this.propop = false;
+    }
+    init() {
+        assertGroupNotEmpty(this.params);
+        this._ops = this.params.map(op => createQueryOperation(op, null, this.options));
+    }
+    reset() {
+        this.done = false;
+        this.keep = false;
+        for (let i = 0, { length } = this._ops; i < length; i++) {
+            this._ops[i].reset();
+        }
+    }
+    next(item, key, owner) {
+        let done = false;
+        let success = false;
+        for (let i = 0, { length } = this._ops; i < length; i++) {
+            const op = this._ops[i];
+            op.next(item, key, owner);
+            if (op.keep) {
+                done = true;
+                success = op.keep;
+                break;
+            }
+        }
+        this.keep = success;
+        this.done = done;
+    }
+}
+class $Nor extends $Or {
+    constructor() {
+        super(...arguments);
+        this.propop = false;
+    }
+    next(item, key, owner) {
+        super.next(item, key, owner);
+        this.keep = !this.keep;
+    }
+}
+class $In extends BaseOperation {
+    constructor() {
+        super(...arguments);
+        this.propop = true;
+    }
+    init() {
+        this._testers = this.params.map(value => {
+            if (containsOperation(value, this.options)) {
+                throw new Error(`cannot nest $ under ${this.name.toLowerCase()}`);
+            }
+            return createTester(value, this.options.compare);
+        });
+    }
+    next(item, key, owner) {
+        let done = false;
+        let success = false;
+        for (let i = 0, { length } = this._testers; i < length; i++) {
+            const test = this._testers[i];
+            if (test(item)) {
+                done = true;
+                success = true;
+                break;
+            }
+        }
+        this.keep = success;
+        this.done = done;
+    }
+}
+class $Nin extends BaseOperation {
+    constructor(params, ownerQuery, options, name) {
+        super(params, ownerQuery, options, name);
+        this.propop = true;
+        this._in = new $In(params, ownerQuery, options, name);
+    }
+    next(item, key, owner, root) {
+        this._in.next(item, key, owner);
+        if (isArray(owner) && !root) {
+            if (this._in.keep) {
+                this.keep = false;
+                this.done = true;
+            }
+            else if (key == owner.length - 1) {
+                this.keep = true;
+                this.done = true;
+            }
+        }
+        else {
+            this.keep = !this._in.keep;
+            this.done = true;
+        }
+    }
+    reset() {
+        super.reset();
+        this._in.reset();
+    }
+}
+class $Exists extends BaseOperation {
+    constructor() {
+        super(...arguments);
+        this.propop = true;
+    }
+    next(item, key, owner) {
+        if (owner.hasOwnProperty(key) === this.params) {
+            this.done = true;
+            this.keep = true;
+        }
+    }
+}
+class $And extends NamedGroupOperation {
+    constructor(params, owneryQuery, options, name) {
+        super(params, owneryQuery, options, params.map(query => createQueryOperation(query, owneryQuery, options)), name);
+        this.propop = false;
+        assertGroupNotEmpty(params);
+    }
+    next(item, key, owner, root) {
+        this.childrenNext(item, key, owner, root);
+    }
+}
+class $All extends NamedGroupOperation {
+    constructor(params, owneryQuery, options, name) {
+        super(params, owneryQuery, options, params.map(query => createQueryOperation(query, owneryQuery, options)), name);
+        this.propop = true;
+    }
+    next(item, key, owner, root) {
+        this.childrenNext(item, key, owner, root);
+    }
+}
+const $eq = (params, owneryQuery, options) => new EqualsOperation(params, owneryQuery, options);
+const $ne = (params, owneryQuery, options, name) => new $Ne(params, owneryQuery, options, name);
+const $or = (params, owneryQuery, options, name) => new $Or(params, owneryQuery, options, name);
+const $nor = (params, owneryQuery, options, name) => new $Nor(params, owneryQuery, options, name);
+const $elemMatch = (params, owneryQuery, options, name) => new $ElemMatch(params, owneryQuery, options, name);
+const $nin = (params, owneryQuery, options, name) => new $Nin(params, owneryQuery, options, name);
+const $in = (params, owneryQuery, options, name) => {
+    return new $In(params, owneryQuery, options, name);
+};
+const $lt = numericalOperation(params => b => b < params);
+const $lte = numericalOperation(params => b => b <= params);
+const $gt = numericalOperation(params => b => b > params);
+const $gte = numericalOperation(params => b => b >= params);
+const $mod = ([mod, equalsValue], owneryQuery, options) => new EqualsOperation(b => comparable(b) % mod === equalsValue, owneryQuery, options);
+const $exists = (params, owneryQuery, options, name) => new $Exists(params, owneryQuery, options, name);
+const $regex = (pattern, owneryQuery, options) => new EqualsOperation(new RegExp(pattern, owneryQuery.$options), owneryQuery, options);
+const $not = (params, owneryQuery, options, name) => new $Not(params, owneryQuery, options, name);
+const typeAliases = {
+    number: v => typeof v === "number",
+    string: v => typeof v === "string",
+    bool: v => typeof v === "boolean",
+    array: v => Array.isArray(v),
+    null: v => v === null,
+    timestamp: v => v instanceof Date
+};
+const $type = (clazz, owneryQuery, options) => new EqualsOperation(b => {
+    if (typeof clazz === "string") {
+        if (!typeAliases[clazz]) {
+            throw new Error(`Type alias does not exist`);
+        }
+        return typeAliases[clazz](b);
+    }
+    return b != null ? b instanceof clazz || b.constructor === clazz : false;
+}, owneryQuery, options);
+const $and = (params, ownerQuery, options, name) => new $And(params, ownerQuery, options, name);
+const $all = (params, ownerQuery, options, name) => new $All(params, ownerQuery, options, name);
+const $size = (params, ownerQuery, options) => new $Size(params, ownerQuery, options, "$size");
+const $options = () => null;
+const $where = (params, ownerQuery, options) => {
+    let test;
+    if (isFunction(params)) {
+        test = params;
+    }
+    else if (!process.env.CSP_ENABLED) {
+        test = new Function("obj", "return " + params);
+    }
+    else {
+        throw new Error(`In CSP mode, sift does not support strings in "$where" condition`);
+    }
+    return new EqualsOperation(b => test.bind(b)(b), ownerQuery, options);
+};
+
+var defaultOperations = /*#__PURE__*/Object.freeze({
+    __proto__: null,
+    $Size: $Size,
+    $eq: $eq,
+    $ne: $ne,
+    $or: $or,
+    $nor: $nor,
+    $elemMatch: $elemMatch,
+    $nin: $nin,
+    $in: $in,
+    $lt: $lt,
+    $lte: $lte,
+    $gt: $gt,
+    $gte: $gte,
+    $mod: $mod,
+    $exists: $exists,
+    $regex: $regex,
+    $not: $not,
+    $type: $type,
+    $and: $and,
+    $all: $all,
+    $size: $size,
+    $options: $options,
+    $where: $where
+});
+
+const createDefaultQueryOperation = (query, ownerQuery, { compare, operations } = {}) => {
+    return createQueryOperation(query, ownerQuery, {
+        compare,
+        operations: Object.assign({}, defaultOperations, operations || {})
+    });
+};
+const createDefaultQueryTester = (query, options = {}) => {
+    const op = createDefaultQueryOperation(query, null, options);
+    return createOperationTester(op);
+};
+
+export default createDefaultQueryTester;
+export { $Size, $all, $and, $elemMatch, $eq, $exists, $gt, $gte, $in, $lt, $lte, $mod, $ne, $nin, $nor, $not, $options, $or, $regex, $size, $type, $where, EqualsOperation, createDefaultQueryOperation, createEqualsOperation, createOperationTester, createQueryOperation, createQueryTester };
+//# sourceMappingURL=index.js.map

node_modules/sift/es5m/index.js

@@ -0,0 +1,729 @@
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation.
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.
+***************************************************************************** */
+/* global Reflect, Promise */
+
+var extendStatics = function(d, b) {
+    extendStatics = Object.setPrototypeOf ||
+        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+        function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
+    return extendStatics(d, b);
+};
+
+function __extends(d, b) {
+    if (typeof b !== "function" && b !== null)
+        throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
+    extendStatics(d, b);
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+var typeChecker = function (type) {
+    var typeString = "[object " + type + "]";
+    return function (value) {
+        return getClassName(value) === typeString;
+    };
+};
+var getClassName = function (value) { return Object.prototype.toString.call(value); };
+var comparable = function (value) {
+    if (value instanceof Date) {
+        return value.getTime();
+    }
+    else if (isArray(value)) {
+        return value.map(comparable);
+    }
+    else if (value && typeof value.toJSON === "function") {
+        return value.toJSON();
+    }
+    return value;
+};
+var isArray = typeChecker("Array");
+var isObject = typeChecker("Object");
+var isFunction = typeChecker("Function");
+var isVanillaObject = function (value) {
+    return (value &&
+        (value.constructor === Object ||
+            value.constructor === Array ||
+            value.constructor.toString() === "function Object() { [native code] }" ||
+            value.constructor.toString() === "function Array() { [native code] }") &&
+        !value.toJSON);
+};
+var equals = function (a, b) {
+    if (a == null && a == b) {
+        return true;
+    }
+    if (a === b) {
+        return true;
+    }
+    if (Object.prototype.toString.call(a) !== Object.prototype.toString.call(b)) {
+        return false;
+    }
+    if (isArray(a)) {
+        if (a.length !== b.length) {
+            return false;
+        }
+        for (var i = 0, length_1 = a.length; i < length_1; i++) {
+            if (!equals(a[i], b[i]))
+                return false;
+        }
+        return true;
+    }
+    else if (isObject(a)) {
+        if (Object.keys(a).length !== Object.keys(b).length) {
+            return false;
+        }
+        for (var key in a) {
+            if (!equals(a[key], b[key]))
+                return false;
+        }
+        return true;
+    }
+    return false;
+};
+
+/**
+ * Walks through each value given the context - used for nested operations. E.g:
+ * { "person.address": { $eq: "blarg" }}
+ */
+var walkKeyPathValues = function (item, keyPath, next, depth, key, owner) {
+    var currentKey = keyPath[depth];
+    // if array, then try matching. Might fall through for cases like:
+    // { $eq: [1, 2, 3] }, [ 1, 2, 3 ].
+    if (isArray(item) && isNaN(Number(currentKey))) {
+        for (var i = 0, length_1 = item.length; i < length_1; i++) {
+            // if FALSE is returned, then terminate walker. For operations, this simply
+            // means that the search critera was met.
+            if (!walkKeyPathValues(item[i], keyPath, next, depth, i, item)) {
+                return false;
+            }
+        }
+    }
+    if (depth === keyPath.length || item == null) {
+        return next(item, key, owner, depth === 0);
+    }
+    return walkKeyPathValues(item[currentKey], keyPath, next, depth + 1, currentKey, item);
+};
+var BaseOperation = /** @class */ (function () {
+    function BaseOperation(params, owneryQuery, options, name) {
+        this.params = params;
+        this.owneryQuery = owneryQuery;
+        this.options = options;
+        this.name = name;
+        this.init();
+    }
+    BaseOperation.prototype.init = function () { };
+    BaseOperation.prototype.reset = function () {
+        this.done = false;
+        this.keep = false;
+    };
+    return BaseOperation;
+}());
+var GroupOperation = /** @class */ (function (_super) {
+    __extends(GroupOperation, _super);
+    function GroupOperation(params, owneryQuery, options, children) {
+        var _this = _super.call(this, params, owneryQuery, options) || this;
+        _this.children = children;
+        return _this;
+    }
+    /**
+     */
+    GroupOperation.prototype.reset = function () {
+        this.keep = false;
+        this.done = false;
+        for (var i = 0, length_2 = this.children.length; i < length_2; i++) {
+            this.children[i].reset();
+        }
+    };
+    /**
+     */
+    GroupOperation.prototype.childrenNext = function (item, key, owner, root) {
+        var done = true;
+        var keep = true;
+        for (var i = 0, length_3 = this.children.length; i < length_3; i++) {
+            var childOperation = this.children[i];
+            if (!childOperation.done) {
+                childOperation.next(item, key, owner, root);
+            }
+            if (!childOperation.keep) {
+                keep = false;
+            }
+            if (childOperation.done) {
+                if (!childOperation.keep) {
+                    break;
+                }
+            }
+            else {
+                done = false;
+            }
+        }
+        this.done = done;
+        this.keep = keep;
+    };
+    return GroupOperation;
+}(BaseOperation));
+var NamedGroupOperation = /** @class */ (function (_super) {
+    __extends(NamedGroupOperation, _super);
+    function NamedGroupOperation(params, owneryQuery, options, children, name) {
+        var _this = _super.call(this, params, owneryQuery, options, children) || this;
+        _this.name = name;
+        return _this;
+    }
+    return NamedGroupOperation;
+}(GroupOperation));
+var QueryOperation = /** @class */ (function (_super) {
+    __extends(QueryOperation, _super);
+    function QueryOperation() {
+        var _this = _super !== null && _super.apply(this, arguments) || this;
+        _this.propop = true;
+        return _this;
+    }
+    /**
+     */
+    QueryOperation.prototype.next = function (item, key, parent, root) {
+        this.childrenNext(item, key, parent, root);
+    };
+    return QueryOperation;
+}(GroupOperation));
+var NestedOperation = /** @class */ (function (_super) {
+    __extends(NestedOperation, _super);
+    function NestedOperation(keyPath, params, owneryQuery, options, children) {
+        var _this = _super.call(this, params, owneryQuery, options, children) || this;
+        _this.keyPath = keyPath;
+        _this.propop = true;
+        /**
+         */
+        _this._nextNestedValue = function (value, key, owner, root) {
+            _this.childrenNext(value, key, owner, root);
+            return !_this.done;
+        };
+        return _this;
+    }
+    /**
+     */
+    NestedOperation.prototype.next = function (item, key, parent) {
+        walkKeyPathValues(item, this.keyPath, this._nextNestedValue, 0, key, parent);
+    };
+    return NestedOperation;
+}(GroupOperation));
+var createTester = function (a, compare) {
+    if (a instanceof Function) {
+        return a;
+    }
+    if (a instanceof RegExp) {
+        return function (b) {
+            var result = typeof b === "string" && a.test(b);
+            a.lastIndex = 0;
+            return result;
+        };
+    }
+    var comparableA = comparable(a);
+    return function (b) { return compare(comparableA, comparable(b)); };
+};
+var EqualsOperation = /** @class */ (function (_super) {
+    __extends(EqualsOperation, _super);
+    function EqualsOperation() {
+        var _this = _super !== null && _super.apply(this, arguments) || this;
+        _this.propop = true;
+        return _this;
+    }
+    EqualsOperation.prototype.init = function () {
+        this._test = createTester(this.params, this.options.compare);
+    };
+    EqualsOperation.prototype.next = function (item, key, parent) {
+        if (!Array.isArray(parent) || parent.hasOwnProperty(key)) {
+            if (this._test(item, key, parent)) {
+                this.done = true;
+                this.keep = true;
+            }
+        }
+    };
+    return EqualsOperation;
+}(BaseOperation));
+var createEqualsOperation = function (params, owneryQuery, options) { return new EqualsOperation(params, owneryQuery, options); };
+var NopeOperation = /** @class */ (function (_super) {
+    __extends(NopeOperation, _super);
+    function NopeOperation() {
+        var _this = _super !== null && _super.apply(this, arguments) || this;
+        _this.propop = true;
+        return _this;
+    }
+    NopeOperation.prototype.next = function () {
+        this.done = true;
+        this.keep = false;
+    };
+    return NopeOperation;
+}(BaseOperation));
+var numericalOperationCreator = function (createNumericalOperation) { return function (params, owneryQuery, options, name) {
+    if (params == null) {
+        return new NopeOperation(params, owneryQuery, options, name);
+    }
+    return createNumericalOperation(params, owneryQuery, options, name);
+}; };
+var numericalOperation = function (createTester) {
+    return numericalOperationCreator(function (params, owneryQuery, options, name) {
+        var typeofParams = typeof comparable(params);
+        var test = createTester(params);
+        return new EqualsOperation(function (b) {
+            return typeof comparable(b) === typeofParams && test(b);
+        }, owneryQuery, options, name);
+    });
+};
+var createNamedOperation = function (name, params, parentQuery, options) {
+    var operationCreator = options.operations[name];
+    if (!operationCreator) {
+        throwUnsupportedOperation(name);
+    }
+    return operationCreator(params, parentQuery, options, name);
+};
+var throwUnsupportedOperation = function (name) {
+    throw new Error("Unsupported operation: " + name);
+};
+var containsOperation = function (query, options) {
+    for (var key in query) {
+        if (options.operations.hasOwnProperty(key) || key.charAt(0) === "$")
+            return true;
+    }
+    return false;
+};
+var createNestedOperation = function (keyPath, nestedQuery, parentKey, owneryQuery, options) {
+    if (containsOperation(nestedQuery, options)) {
+        var _a = createQueryOperations(nestedQuery, parentKey, options), selfOperations = _a[0], nestedOperations = _a[1];
+        if (nestedOperations.length) {
+            throw new Error("Property queries must contain only operations, or exact objects.");
+        }
+        return new NestedOperation(keyPath, nestedQuery, owneryQuery, options, selfOperations);
+    }
+    return new NestedOperation(keyPath, nestedQuery, owneryQuery, options, [
+        new EqualsOperation(nestedQuery, owneryQuery, options)
+    ]);
+};
+var createQueryOperation = function (query, owneryQuery, _a) {
+    if (owneryQuery === void 0) { owneryQuery = null; }
+    var _b = _a === void 0 ? {} : _a, compare = _b.compare, operations = _b.operations;
+    var options = {
+        compare: compare || equals,
+        operations: Object.assign({}, operations || {})
+    };
+    var _c = createQueryOperations(query, null, options), selfOperations = _c[0], nestedOperations = _c[1];
+    var ops = [];
+    if (selfOperations.length) {
+        ops.push(new NestedOperation([], query, owneryQuery, options, selfOperations));
+    }
+    ops.push.apply(ops, nestedOperations);
+    if (ops.length === 1) {
+        return ops[0];
+    }
+    return new QueryOperation(query, owneryQuery, options, ops);
+};
+var createQueryOperations = function (query, parentKey, options) {
+    var selfOperations = [];
+    var nestedOperations = [];
+    if (!isVanillaObject(query)) {
+        selfOperations.push(new EqualsOperation(query, query, options));
+        return [selfOperations, nestedOperations];
+    }
+    for (var key in query) {
+        if (options.operations.hasOwnProperty(key)) {
+            var op = createNamedOperation(key, query[key], query, options);
+            if (op) {
+                if (!op.propop && parentKey && !options.operations[parentKey]) {
+                    throw new Error("Malformed query. " + key + " cannot be matched against property.");
+                }
+            }
+            // probably just a flag for another operation (like $options)
+            if (op != null) {
+                selfOperations.push(op);
+            }
+        }
+        else if (key.charAt(0) === "$") {
+            throwUnsupportedOperation(key);
+        }
+        else {
+            nestedOperations.push(createNestedOperation(key.split("."), query[key], key, query, options));
+        }
+    }
+    return [selfOperations, nestedOperations];
+};
+var createOperationTester = function (operation) { return function (item, key, owner) {
+    operation.reset();
+    operation.next(item, key, owner);
+    return operation.keep;
+}; };
+var createQueryTester = function (query, options) {
+    if (options === void 0) { options = {}; }
+    return createOperationTester(createQueryOperation(query, null, options));
+};
+
+var $Ne = /** @class */ (function (_super) {
+    __extends($Ne, _super);
+    function $Ne() {
+        var _this = _super !== null && _super.apply(this, arguments) || this;
+        _this.propop = true;
+        return _this;
+    }
+    $Ne.prototype.init = function () {
+        this._test = createTester(this.params, this.options.compare);
+    };
+    $Ne.prototype.reset = function () {
+        _super.prototype.reset.call(this);
+        this.keep = true;
+    };
+    $Ne.prototype.next = function (item) {
+        if (this._test(item)) {
+            this.done = true;
+            this.keep = false;
+        }
+    };
+    return $Ne;
+}(BaseOperation));
+// https://docs.mongodb.com/manual/reference/operator/query/elemMatch/
+var $ElemMatch = /** @class */ (function (_super) {
+    __extends($ElemMatch, _super);
+    function $ElemMatch() {
+        var _this = _super !== null && _super.apply(this, arguments) || this;
+        _this.propop = true;
+        return _this;
+    }
+    $ElemMatch.prototype.init = function () {
+        if (!this.params || typeof this.params !== "object") {
+            throw new Error("Malformed query. $elemMatch must by an object.");
+        }
+        this._queryOperation = createQueryOperation(this.params, this.owneryQuery, this.options);
+    };
+    $ElemMatch.prototype.reset = function () {
+        _super.prototype.reset.call(this);
+        this._queryOperation.reset();
+    };
+    $ElemMatch.prototype.next = function (item) {
+        if (isArray(item)) {
+            for (var i = 0, length_1 = item.length; i < length_1; i++) {
+                // reset query operation since item being tested needs to pass _all_ query
+                // operations for it to be a success
+                this._queryOperation.reset();
+                var child = item[i];
+                this._queryOperation.next(child, i, item, false);
+                this.keep = this.keep || this._queryOperation.keep;
+            }
+            this.done = true;
+        }
+        else {
+            this.done = false;
+            this.keep = false;
+        }
+    };
+    return $ElemMatch;
+}(BaseOperation));
+var $Not = /** @class */ (function (_super) {
+    __extends($Not, _super);
+    function $Not() {
+        var _this = _super !== null && _super.apply(this, arguments) || this;
+        _this.propop = true;
+        return _this;
+    }
+    $Not.prototype.init = function () {
+        this._queryOperation = createQueryOperation(this.params, this.owneryQuery, this.options);
+    };
+    $Not.prototype.reset = function () {
+        _super.prototype.reset.call(this);
+        this._queryOperation.reset();
+    };
+    $Not.prototype.next = function (item, key, owner, root) {
+        this._queryOperation.next(item, key, owner, root);
+        this.done = this._queryOperation.done;
+        this.keep = !this._queryOperation.keep;
+    };
+    return $Not;
+}(BaseOperation));
+var $Size = /** @class */ (function (_super) {
+    __extends($Size, _super);
+    function $Size() {
+        var _this = _super !== null && _super.apply(this, arguments) || this;
+        _this.propop = true;
+        return _this;
+    }
+    $Size.prototype.init = function () { };
+    $Size.prototype.next = function (item) {
+        if (isArray(item) && item.length === this.params) {
+            this.done = true;
+            this.keep = true;
+        }
+        // if (parent && parent.length === this.params) {
+        //   this.done = true;
+        //   this.keep = true;
+        // }
+    };
+    return $Size;
+}(BaseOperation));
+var assertGroupNotEmpty = function (values) {
+    if (values.length === 0) {
+        throw new Error("$and/$or/$nor must be a nonempty array");
+    }
+};
+var $Or = /** @class */ (function (_super) {
+    __extends($Or, _super);
+    function $Or() {
+        var _this = _super !== null && _super.apply(this, arguments) || this;
+        _this.propop = false;
+        return _this;
+    }
+    $Or.prototype.init = function () {
+        var _this = this;
+        assertGroupNotEmpty(this.params);
+        this._ops = this.params.map(function (op) {
+            return createQueryOperation(op, null, _this.options);
+        });
+    };
+    $Or.prototype.reset = function () {
+        this.done = false;
+        this.keep = false;
+        for (var i = 0, length_2 = this._ops.length; i < length_2; i++) {
+            this._ops[i].reset();
+        }
+    };
+    $Or.prototype.next = function (item, key, owner) {
+        var done = false;
+        var success = false;
+        for (var i = 0, length_3 = this._ops.length; i < length_3; i++) {
+            var op = this._ops[i];
+            op.next(item, key, owner);
+            if (op.keep) {
+                done = true;
+                success = op.keep;
+                break;
+            }
+        }
+        this.keep = success;
+        this.done = done;
+    };
+    return $Or;
+}(BaseOperation));
+var $Nor = /** @class */ (function (_super) {
+    __extends($Nor, _super);
+    function $Nor() {
+        var _this = _super !== null && _super.apply(this, arguments) || this;
+        _this.propop = false;
+        return _this;
+    }
+    $Nor.prototype.next = function (item, key, owner) {
+        _super.prototype.next.call(this, item, key, owner);
+        this.keep = !this.keep;
+    };
+    return $Nor;
+}($Or));
+var $In = /** @class */ (function (_super) {
+    __extends($In, _super);
+    function $In() {
+        var _this = _super !== null && _super.apply(this, arguments) || this;
+        _this.propop = true;
+        return _this;
+    }
+    $In.prototype.init = function () {
+        var _this = this;
+        this._testers = this.params.map(function (value) {
+            if (containsOperation(value, _this.options)) {
+                throw new Error("cannot nest $ under " + _this.name.toLowerCase());
+            }
+            return createTester(value, _this.options.compare);
+        });
+    };
+    $In.prototype.next = function (item, key, owner) {
+        var done = false;
+        var success = false;
+        for (var i = 0, length_4 = this._testers.length; i < length_4; i++) {
+            var test = this._testers[i];
+            if (test(item)) {
+                done = true;
+                success = true;
+                break;
+            }
+        }
+        this.keep = success;
+        this.done = done;
+    };
+    return $In;
+}(BaseOperation));
+var $Nin = /** @class */ (function (_super) {
+    __extends($Nin, _super);
+    function $Nin(params, ownerQuery, options, name) {
+        var _this = _super.call(this, params, ownerQuery, options, name) || this;
+        _this.propop = true;
+        _this._in = new $In(params, ownerQuery, options, name);
+        return _this;
+    }
+    $Nin.prototype.next = function (item, key, owner, root) {
+        this._in.next(item, key, owner);
+        if (isArray(owner) && !root) {
+            if (this._in.keep) {
+                this.keep = false;
+                this.done = true;
+            }
+            else if (key == owner.length - 1) {
+                this.keep = true;
+                this.done = true;
+            }
+        }
+        else {
+            this.keep = !this._in.keep;
+            this.done = true;
+        }
+    };
+    $Nin.prototype.reset = function () {
+        _super.prototype.reset.call(this);
+        this._in.reset();
+    };
+    return $Nin;
+}(BaseOperation));
+var $Exists = /** @class */ (function (_super) {
+    __extends($Exists, _super);
+    function $Exists() {
+        var _this = _super !== null && _super.apply(this, arguments) || this;
+        _this.propop = true;
+        return _this;
+    }
+    $Exists.prototype.next = function (item, key, owner) {
+        if (owner.hasOwnProperty(key) === this.params) {
+            this.done = true;
+            this.keep = true;
+        }
+    };
+    return $Exists;
+}(BaseOperation));
+var $And = /** @class */ (function (_super) {
+    __extends($And, _super);
+    function $And(params, owneryQuery, options, name) {
+        var _this = _super.call(this, params, owneryQuery, options, params.map(function (query) { return createQueryOperation(query, owneryQuery, options); }), name) || this;
+        _this.propop = false;
+        assertGroupNotEmpty(params);
+        return _this;
+    }
+    $And.prototype.next = function (item, key, owner, root) {
+        this.childrenNext(item, key, owner, root);
+    };
+    return $And;
+}(NamedGroupOperation));
+var $All = /** @class */ (function (_super) {
+    __extends($All, _super);
+    function $All(params, owneryQuery, options, name) {
+        var _this = _super.call(this, params, owneryQuery, options, params.map(function (query) { return createQueryOperation(query, owneryQuery, options); }), name) || this;
+        _this.propop = true;
+        return _this;
+    }
+    $All.prototype.next = function (item, key, owner, root) {
+        this.childrenNext(item, key, owner, root);
+    };
+    return $All;
+}(NamedGroupOperation));
+var $eq = function (params, owneryQuery, options) {
+    return new EqualsOperation(params, owneryQuery, options);
+};
+var $ne = function (params, owneryQuery, options, name) { return new $Ne(params, owneryQuery, options, name); };
+var $or = function (params, owneryQuery, options, name) { return new $Or(params, owneryQuery, options, name); };
+var $nor = function (params, owneryQuery, options, name) { return new $Nor(params, owneryQuery, options, name); };
+var $elemMatch = function (params, owneryQuery, options, name) { return new $ElemMatch(params, owneryQuery, options, name); };
+var $nin = function (params, owneryQuery, options, name) { return new $Nin(params, owneryQuery, options, name); };
+var $in = function (params, owneryQuery, options, name) {
+    return new $In(params, owneryQuery, options, name);
+};
+var $lt = numericalOperation(function (params) { return function (b) { return b < params; }; });
+var $lte = numericalOperation(function (params) { return function (b) { return b <= params; }; });
+var $gt = numericalOperation(function (params) { return function (b) { return b > params; }; });
+var $gte = numericalOperation(function (params) { return function (b) { return b >= params; }; });
+var $mod = function (_a, owneryQuery, options) {
+    var mod = _a[0], equalsValue = _a[1];
+    return new EqualsOperation(function (b) { return comparable(b) % mod === equalsValue; }, owneryQuery, options);
+};
+var $exists = function (params, owneryQuery, options, name) { return new $Exists(params, owneryQuery, options, name); };
+var $regex = function (pattern, owneryQuery, options) {
+    return new EqualsOperation(new RegExp(pattern, owneryQuery.$options), owneryQuery, options);
+};
+var $not = function (params, owneryQuery, options, name) { return new $Not(params, owneryQuery, options, name); };
+var typeAliases = {
+    number: function (v) { return typeof v === "number"; },
+    string: function (v) { return typeof v === "string"; },
+    bool: function (v) { return typeof v === "boolean"; },
+    array: function (v) { return Array.isArray(v); },
+    null: function (v) { return v === null; },
+    timestamp: function (v) { return v instanceof Date; }
+};
+var $type = function (clazz, owneryQuery, options) {
+    return new EqualsOperation(function (b) {
+        if (typeof clazz === "string") {
+            if (!typeAliases[clazz]) {
+                throw new Error("Type alias does not exist");
+            }
+            return typeAliases[clazz](b);
+        }
+        return b != null ? b instanceof clazz || b.constructor === clazz : false;
+    }, owneryQuery, options);
+};
+var $and = function (params, ownerQuery, options, name) { return new $And(params, ownerQuery, options, name); };
+var $all = function (params, ownerQuery, options, name) { return new $All(params, ownerQuery, options, name); };
+var $size = function (params, ownerQuery, options) { return new $Size(params, ownerQuery, options, "$size"); };
+var $options = function () { return null; };
+var $where = function (params, ownerQuery, options) {
+    var test;
+    if (isFunction(params)) {
+        test = params;
+    }
+    else if (!process.env.CSP_ENABLED) {
+        test = new Function("obj", "return " + params);
+    }
+    else {
+        throw new Error("In CSP mode, sift does not support strings in \"$where\" condition");
+    }
+    return new EqualsOperation(function (b) { return test.bind(b)(b); }, ownerQuery, options);
+};
+
+var defaultOperations = /*#__PURE__*/Object.freeze({
+    __proto__: null,
+    $Size: $Size,
+    $eq: $eq,
+    $ne: $ne,
+    $or: $or,
+    $nor: $nor,
+    $elemMatch: $elemMatch,
+    $nin: $nin,
+    $in: $in,
+    $lt: $lt,
+    $lte: $lte,
+    $gt: $gt,
+    $gte: $gte,
+    $mod: $mod,
+    $exists: $exists,
+    $regex: $regex,
+    $not: $not,
+    $type: $type,
+    $and: $and,
+    $all: $all,
+    $size: $size,
+    $options: $options,
+    $where: $where
+});
+
+var createDefaultQueryOperation = function (query, ownerQuery, _a) {
+    var _b = _a === void 0 ? {} : _a, compare = _b.compare, operations = _b.operations;
+    return createQueryOperation(query, ownerQuery, {
+        compare: compare,
+        operations: Object.assign({}, defaultOperations, operations || {})
+    });
+};
+var createDefaultQueryTester = function (query, options) {
+    if (options === void 0) { options = {}; }
+    var op = createDefaultQueryOperation(query, null, options);
+    return createOperationTester(op);
+};
+
+export default createDefaultQueryTester;
+export { $Size, $all, $and, $elemMatch, $eq, $exists, $gt, $gte, $in, $lt, $lte, $mod, $ne, $nin, $nor, $not, $options, $or, $regex, $size, $type, $where, EqualsOperation, createDefaultQueryOperation, createEqualsOperation, createOperationTester, createQueryOperation, createQueryTester };
+//# sourceMappingURL=index.js.map

node_modules/sift/index.d.ts

@@ -0,0 +1,4 @@
+import sift from "./lib";
+
+export default sift;
+export * from "./lib";

node_modules/sift/index.js

@@ -0,0 +1,4 @@
+const lib = require("./lib");
+
+module.exports = lib.default;
+Object.assign(module.exports, lib);

node_modules/sift/lib/core.d.ts

@@ -0,0 +1,120 @@
+import { Key, Comparator } from "./utils";
+export interface Operation<TItem> {
+    readonly keep: boolean;
+    readonly done: boolean;
+    propop: boolean;
+    reset(): any;
+    next(item: TItem, key?: Key, owner?: any, root?: boolean): any;
+}
+export declare type Tester = (item: any, key?: Key, owner?: any, root?: boolean) => boolean;
+export interface NamedOperation {
+    name: string;
+}
+export declare type OperationCreator<TItem> = (params: any, parentQuery: any, options: Options, name: string) => Operation<TItem>;
+export declare type BasicValueQuery<TValue> = {
+    $eq?: TValue;
+    $ne?: TValue;
+    $lt?: TValue;
+    $gt?: TValue;
+    $lte?: TValue;
+    $gte?: TValue;
+    $in?: TValue[];
+    $nin?: TValue[];
+    $all?: TValue[];
+    $mod?: [number, number];
+    $exists?: boolean;
+    $regex?: string | RegExp;
+    $size?: number;
+    $where?: ((this: TValue, obj: TValue) => boolean) | string;
+    $options?: "i" | "g" | "m" | "u";
+    $type?: Function;
+    $not?: NestedQuery<TValue>;
+    $or?: NestedQuery<TValue>[];
+    $nor?: NestedQuery<TValue>[];
+    $and?: NestedQuery<TValue>[];
+};
+export declare type ArrayValueQuery<TValue> = {
+    $elemMatch?: Query<TValue>;
+} & BasicValueQuery<TValue>;
+declare type Unpacked<T> = T extends (infer U)[] ? U : T;
+export declare type ValueQuery<TValue> = TValue extends Array<any> ? ArrayValueQuery<Unpacked<TValue>> : BasicValueQuery<TValue>;
+declare type NotObject = string | number | Date | boolean | Array<any>;
+export declare type ShapeQuery<TItemSchema> = TItemSchema extends NotObject ? {} : {
+    [k in keyof TItemSchema]?: TItemSchema[k] | ValueQuery<TItemSchema[k]>;
+};
+export declare type NestedQuery<TItemSchema> = ValueQuery<TItemSchema> & ShapeQuery<TItemSchema>;
+export declare type Query<TItemSchema> = TItemSchema | RegExp | NestedQuery<TItemSchema>;
+export declare type QueryOperators<TValue = any> = keyof ValueQuery<TValue>;
+export declare abstract class BaseOperation<TParams, TItem = any> implements Operation<TItem> {
+    readonly params: TParams;
+    readonly owneryQuery: any;
+    readonly options: Options;
+    readonly name?: string;
+    keep: boolean;
+    done: boolean;
+    abstract propop: boolean;
+    constructor(params: TParams, owneryQuery: any, options: Options, name?: string);
+    protected init(): void;
+    reset(): void;
+    abstract next(item: any, key: Key, parent: any, root: boolean): any;
+}
+declare abstract class GroupOperation extends BaseOperation<any> {
+    readonly children: Operation<any>[];
+    keep: boolean;
+    done: boolean;
+    constructor(params: any, owneryQuery: any, options: Options, children: Operation<any>[]);
+    /**
+     */
+    reset(): void;
+    abstract next(item: any, key: Key, owner: any, root: boolean): any;
+    /**
+     */
+    protected childrenNext(item: any, key: Key, owner: any, root: boolean): void;
+}
+export declare abstract class NamedGroupOperation extends GroupOperation implements NamedOperation {
+    readonly name: string;
+    abstract propop: boolean;
+    constructor(params: any, owneryQuery: any, options: Options, children: Operation<any>[], name: string);
+}
+export declare class QueryOperation<TItem> extends GroupOperation {
+    readonly propop = true;
+    /**
+     */
+    next(item: TItem, key: Key, parent: any, root: boolean): void;
+}
+export declare class NestedOperation extends GroupOperation {
+    readonly keyPath: Key[];
+    readonly propop = true;
+    constructor(keyPath: Key[], params: any, owneryQuery: any, options: Options, children: Operation<any>[]);
+    /**
+     */
+    next(item: any, key: Key, parent: any): void;
+    /**
+     */
+    private _nextNestedValue;
+}
+export declare const createTester: (a: any, compare: Comparator) => any;
+export declare class EqualsOperation<TParam> extends BaseOperation<TParam> {
+    readonly propop = true;
+    private _test;
+    init(): void;
+    next(item: any, key: Key, parent: any): void;
+}
+export declare const createEqualsOperation: (params: any, owneryQuery: any, options: Options) => EqualsOperation<any>;
+export declare class NopeOperation<TParam> extends BaseOperation<TParam> {
+    readonly propop = true;
+    next(): void;
+}
+export declare const numericalOperationCreator: (createNumericalOperation: OperationCreator<any>) => (params: any, owneryQuery: any, options: Options, name: string) => Operation<any>;
+export declare const numericalOperation: (createTester: (any: any) => Tester) => (params: any, owneryQuery: any, options: Options, name: string) => Operation<any>;
+export declare type Options = {
+    operations: {
+        [identifier: string]: OperationCreator<any>;
+    };
+    compare: (a: any, b: any) => boolean;
+};
+export declare const containsOperation: (query: any, options: Options) => boolean;
+export declare const createQueryOperation: <TItem, TSchema = TItem>(query: Query<TSchema>, owneryQuery?: any, { compare, operations }?: Partial<Options>) => QueryOperation<TItem>;
+export declare const createOperationTester: <TItem>(operation: Operation<TItem>) => (item: TItem, key?: Key, owner?: any) => boolean;
+export declare const createQueryTester: <TItem, TSchema = TItem>(query: Query<TSchema>, options?: Partial<Options>) => (item: TItem, key?: Key, owner?: any) => boolean;
+export {};

node_modules/sift/lib/index.d.ts

@@ -0,0 +1,6 @@
+import { Query, QueryOperators, BasicValueQuery, ArrayValueQuery, ValueQuery, NestedQuery, ShapeQuery, Options, createQueryTester, EqualsOperation, createQueryOperation, createEqualsOperation, createOperationTester } from "./core";
+declare const createDefaultQueryOperation: <TItem, TSchema extends TItem = TItem>(query: Query<TSchema>, ownerQuery: any, { compare, operations }?: Partial<Options>) => import("./core").QueryOperation<unknown>;
+declare const createDefaultQueryTester: <TItem, TSchema extends TItem = TItem>(query: Query<TSchema>, options?: Partial<Options>) => (item: unknown, key?: import("./utils").Key, owner?: any) => boolean;
+export { Query, QueryOperators, BasicValueQuery, ArrayValueQuery, ValueQuery, NestedQuery, ShapeQuery, EqualsOperation, createQueryTester, createOperationTester, createDefaultQueryOperation, createEqualsOperation, createQueryOperation };
+export * from "./operations";
+export default createDefaultQueryTester;

node_modules/sift/lib/index.js

@@ -0,0 +1,766 @@
+(function (global, factory) {
+    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+    typeof define === 'function' && define.amd ? define(['exports'], factory) :
+    (global = global || self, factory(global.sift = {}));
+}(this, (function (exports) { 'use strict';
+
+    /*! *****************************************************************************
+    Copyright (c) Microsoft Corporation.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose with or without fee is hereby granted.
+
+    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+    REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+    AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+    INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+    LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+    OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+    PERFORMANCE OF THIS SOFTWARE.
+    ***************************************************************************** */
+    /* global Reflect, Promise */
+
+    var extendStatics = function(d, b) {
+        extendStatics = Object.setPrototypeOf ||
+            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
+        return extendStatics(d, b);
+    };
+
+    function __extends(d, b) {
+        if (typeof b !== "function" && b !== null)
+            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
+        extendStatics(d, b);
+        function __() { this.constructor = d; }
+        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+    }
+
+    var typeChecker = function (type) {
+        var typeString = "[object " + type + "]";
+        return function (value) {
+            return getClassName(value) === typeString;
+        };
+    };
+    var getClassName = function (value) { return Object.prototype.toString.call(value); };
+    var comparable = function (value) {
+        if (value instanceof Date) {
+            return value.getTime();
+        }
+        else if (isArray(value)) {
+            return value.map(comparable);
+        }
+        else if (value && typeof value.toJSON === "function") {
+            return value.toJSON();
+        }
+        return value;
+    };
+    var isArray = typeChecker("Array");
+    var isObject = typeChecker("Object");
+    var isFunction = typeChecker("Function");
+    var isVanillaObject = function (value) {
+        return (value &&
+            (value.constructor === Object ||
+                value.constructor === Array ||
+                value.constructor.toString() === "function Object() { [native code] }" ||
+                value.constructor.toString() === "function Array() { [native code] }") &&
+            !value.toJSON);
+    };
+    var equals = function (a, b) {
+        if (a == null && a == b) {
+            return true;
+        }
+        if (a === b) {
+            return true;
+        }
+        if (Object.prototype.toString.call(a) !== Object.prototype.toString.call(b)) {
+            return false;
+        }
+        if (isArray(a)) {
+            if (a.length !== b.length) {
+                return false;
+            }
+            for (var i = 0, length_1 = a.length; i < length_1; i++) {
+                if (!equals(a[i], b[i]))
+                    return false;
+            }
+            return true;
+        }
+        else if (isObject(a)) {
+            if (Object.keys(a).length !== Object.keys(b).length) {
+                return false;
+            }
+            for (var key in a) {
+                if (!equals(a[key], b[key]))
+                    return false;
+            }
+            return true;
+        }
+        return false;
+    };
+
+    /**
+     * Walks through each value given the context - used for nested operations. E.g:
+     * { "person.address": { $eq: "blarg" }}
+     */
+    var walkKeyPathValues = function (item, keyPath, next, depth, key, owner) {
+        var currentKey = keyPath[depth];
+        // if array, then try matching. Might fall through for cases like:
+        // { $eq: [1, 2, 3] }, [ 1, 2, 3 ].
+        if (isArray(item) && isNaN(Number(currentKey))) {
+            for (var i = 0, length_1 = item.length; i < length_1; i++) {
+                // if FALSE is returned, then terminate walker. For operations, this simply
+                // means that the search critera was met.
+                if (!walkKeyPathValues(item[i], keyPath, next, depth, i, item)) {
+                    return false;
+                }
+            }
+        }
+        if (depth === keyPath.length || item == null) {
+            return next(item, key, owner, depth === 0);
+        }
+        return walkKeyPathValues(item[currentKey], keyPath, next, depth + 1, currentKey, item);
+    };
+    var BaseOperation = /** @class */ (function () {
+        function BaseOperation(params, owneryQuery, options, name) {
+            this.params = params;
+            this.owneryQuery = owneryQuery;
+            this.options = options;
+            this.name = name;
+            this.init();
+        }
+        BaseOperation.prototype.init = function () { };
+        BaseOperation.prototype.reset = function () {
+            this.done = false;
+            this.keep = false;
+        };
+        return BaseOperation;
+    }());
+    var GroupOperation = /** @class */ (function (_super) {
+        __extends(GroupOperation, _super);
+        function GroupOperation(params, owneryQuery, options, children) {
+            var _this = _super.call(this, params, owneryQuery, options) || this;
+            _this.children = children;
+            return _this;
+        }
+        /**
+         */
+        GroupOperation.prototype.reset = function () {
+            this.keep = false;
+            this.done = false;
+            for (var i = 0, length_2 = this.children.length; i < length_2; i++) {
+                this.children[i].reset();
+            }
+        };
+        /**
+         */
+        GroupOperation.prototype.childrenNext = function (item, key, owner, root) {
+            var done = true;
+            var keep = true;
+            for (var i = 0, length_3 = this.children.length; i < length_3; i++) {
+                var childOperation = this.children[i];
+                if (!childOperation.done) {
+                    childOperation.next(item, key, owner, root);
+                }
+                if (!childOperation.keep) {
+                    keep = false;
+                }
+                if (childOperation.done) {
+                    if (!childOperation.keep) {
+                        break;
+                    }
+                }
+                else {
+                    done = false;
+                }
+            }
+            this.done = done;
+            this.keep = keep;
+        };
+        return GroupOperation;
+    }(BaseOperation));
+    var NamedGroupOperation = /** @class */ (function (_super) {
+        __extends(NamedGroupOperation, _super);
+        function NamedGroupOperation(params, owneryQuery, options, children, name) {
+            var _this = _super.call(this, params, owneryQuery, options, children) || this;
+            _this.name = name;
+            return _this;
+        }
+        return NamedGroupOperation;
+    }(GroupOperation));
+    var QueryOperation = /** @class */ (function (_super) {
+        __extends(QueryOperation, _super);
+        function QueryOperation() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = true;
+            return _this;
+        }
+        /**
+         */
+        QueryOperation.prototype.next = function (item, key, parent, root) {
+            this.childrenNext(item, key, parent, root);
+        };
+        return QueryOperation;
+    }(GroupOperation));
+    var NestedOperation = /** @class */ (function (_super) {
+        __extends(NestedOperation, _super);
+        function NestedOperation(keyPath, params, owneryQuery, options, children) {
+            var _this = _super.call(this, params, owneryQuery, options, children) || this;
+            _this.keyPath = keyPath;
+            _this.propop = true;
+            /**
+             */
+            _this._nextNestedValue = function (value, key, owner, root) {
+                _this.childrenNext(value, key, owner, root);
+                return !_this.done;
+            };
+            return _this;
+        }
+        /**
+         */
+        NestedOperation.prototype.next = function (item, key, parent) {
+            walkKeyPathValues(item, this.keyPath, this._nextNestedValue, 0, key, parent);
+        };
+        return NestedOperation;
+    }(GroupOperation));
+    var createTester = function (a, compare) {
+        if (a instanceof Function) {
+            return a;
+        }
+        if (a instanceof RegExp) {
+            return function (b) {
+                var result = typeof b === "string" && a.test(b);
+                a.lastIndex = 0;
+                return result;
+            };
+        }
+        var comparableA = comparable(a);
+        return function (b) { return compare(comparableA, comparable(b)); };
+    };
+    var EqualsOperation = /** @class */ (function (_super) {
+        __extends(EqualsOperation, _super);
+        function EqualsOperation() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = true;
+            return _this;
+        }
+        EqualsOperation.prototype.init = function () {
+            this._test = createTester(this.params, this.options.compare);
+        };
+        EqualsOperation.prototype.next = function (item, key, parent) {
+            if (!Array.isArray(parent) || parent.hasOwnProperty(key)) {
+                if (this._test(item, key, parent)) {
+                    this.done = true;
+                    this.keep = true;
+                }
+            }
+        };
+        return EqualsOperation;
+    }(BaseOperation));
+    var createEqualsOperation = function (params, owneryQuery, options) { return new EqualsOperation(params, owneryQuery, options); };
+    var NopeOperation = /** @class */ (function (_super) {
+        __extends(NopeOperation, _super);
+        function NopeOperation() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = true;
+            return _this;
+        }
+        NopeOperation.prototype.next = function () {
+            this.done = true;
+            this.keep = false;
+        };
+        return NopeOperation;
+    }(BaseOperation));
+    var numericalOperationCreator = function (createNumericalOperation) { return function (params, owneryQuery, options, name) {
+        if (params == null) {
+            return new NopeOperation(params, owneryQuery, options, name);
+        }
+        return createNumericalOperation(params, owneryQuery, options, name);
+    }; };
+    var numericalOperation = function (createTester) {
+        return numericalOperationCreator(function (params, owneryQuery, options, name) {
+            var typeofParams = typeof comparable(params);
+            var test = createTester(params);
+            return new EqualsOperation(function (b) {
+                return typeof comparable(b) === typeofParams && test(b);
+            }, owneryQuery, options, name);
+        });
+    };
+    var createNamedOperation = function (name, params, parentQuery, options) {
+        var operationCreator = options.operations[name];
+        if (!operationCreator) {
+            throwUnsupportedOperation(name);
+        }
+        return operationCreator(params, parentQuery, options, name);
+    };
+    var throwUnsupportedOperation = function (name) {
+        throw new Error("Unsupported operation: " + name);
+    };
+    var containsOperation = function (query, options) {
+        for (var key in query) {
+            if (options.operations.hasOwnProperty(key) || key.charAt(0) === "$")
+                return true;
+        }
+        return false;
+    };
+    var createNestedOperation = function (keyPath, nestedQuery, parentKey, owneryQuery, options) {
+        if (containsOperation(nestedQuery, options)) {
+            var _a = createQueryOperations(nestedQuery, parentKey, options), selfOperations = _a[0], nestedOperations = _a[1];
+            if (nestedOperations.length) {
+                throw new Error("Property queries must contain only operations, or exact objects.");
+            }
+            return new NestedOperation(keyPath, nestedQuery, owneryQuery, options, selfOperations);
+        }
+        return new NestedOperation(keyPath, nestedQuery, owneryQuery, options, [
+            new EqualsOperation(nestedQuery, owneryQuery, options)
+        ]);
+    };
+    var createQueryOperation = function (query, owneryQuery, _a) {
+        if (owneryQuery === void 0) { owneryQuery = null; }
+        var _b = _a === void 0 ? {} : _a, compare = _b.compare, operations = _b.operations;
+        var options = {
+            compare: compare || equals,
+            operations: Object.assign({}, operations || {})
+        };
+        var _c = createQueryOperations(query, null, options), selfOperations = _c[0], nestedOperations = _c[1];
+        var ops = [];
+        if (selfOperations.length) {
+            ops.push(new NestedOperation([], query, owneryQuery, options, selfOperations));
+        }
+        ops.push.apply(ops, nestedOperations);
+        if (ops.length === 1) {
+            return ops[0];
+        }
+        return new QueryOperation(query, owneryQuery, options, ops);
+    };
+    var createQueryOperations = function (query, parentKey, options) {
+        var selfOperations = [];
+        var nestedOperations = [];
+        if (!isVanillaObject(query)) {
+            selfOperations.push(new EqualsOperation(query, query, options));
+            return [selfOperations, nestedOperations];
+        }
+        for (var key in query) {
+            if (options.operations.hasOwnProperty(key)) {
+                var op = createNamedOperation(key, query[key], query, options);
+                if (op) {
+                    if (!op.propop && parentKey && !options.operations[parentKey]) {
+                        throw new Error("Malformed query. " + key + " cannot be matched against property.");
+                    }
+                }
+                // probably just a flag for another operation (like $options)
+                if (op != null) {
+                    selfOperations.push(op);
+                }
+            }
+            else if (key.charAt(0) === "$") {
+                throwUnsupportedOperation(key);
+            }
+            else {
+                nestedOperations.push(createNestedOperation(key.split("."), query[key], key, query, options));
+            }
+        }
+        return [selfOperations, nestedOperations];
+    };
+    var createOperationTester = function (operation) { return function (item, key, owner) {
+        operation.reset();
+        operation.next(item, key, owner);
+        return operation.keep;
+    }; };
+    var createQueryTester = function (query, options) {
+        if (options === void 0) { options = {}; }
+        return createOperationTester(createQueryOperation(query, null, options));
+    };
+
+    var $Ne = /** @class */ (function (_super) {
+        __extends($Ne, _super);
+        function $Ne() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = true;
+            return _this;
+        }
+        $Ne.prototype.init = function () {
+            this._test = createTester(this.params, this.options.compare);
+        };
+        $Ne.prototype.reset = function () {
+            _super.prototype.reset.call(this);
+            this.keep = true;
+        };
+        $Ne.prototype.next = function (item) {
+            if (this._test(item)) {
+                this.done = true;
+                this.keep = false;
+            }
+        };
+        return $Ne;
+    }(BaseOperation));
+    // https://docs.mongodb.com/manual/reference/operator/query/elemMatch/
+    var $ElemMatch = /** @class */ (function (_super) {
+        __extends($ElemMatch, _super);
+        function $ElemMatch() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = true;
+            return _this;
+        }
+        $ElemMatch.prototype.init = function () {
+            if (!this.params || typeof this.params !== "object") {
+                throw new Error("Malformed query. $elemMatch must by an object.");
+            }
+            this._queryOperation = createQueryOperation(this.params, this.owneryQuery, this.options);
+        };
+        $ElemMatch.prototype.reset = function () {
+            _super.prototype.reset.call(this);
+            this._queryOperation.reset();
+        };
+        $ElemMatch.prototype.next = function (item) {
+            if (isArray(item)) {
+                for (var i = 0, length_1 = item.length; i < length_1; i++) {
+                    // reset query operation since item being tested needs to pass _all_ query
+                    // operations for it to be a success
+                    this._queryOperation.reset();
+                    var child = item[i];
+                    this._queryOperation.next(child, i, item, false);
+                    this.keep = this.keep || this._queryOperation.keep;
+                }
+                this.done = true;
+            }
+            else {
+                this.done = false;
+                this.keep = false;
+            }
+        };
+        return $ElemMatch;
+    }(BaseOperation));
+    var $Not = /** @class */ (function (_super) {
+        __extends($Not, _super);
+        function $Not() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = true;
+            return _this;
+        }
+        $Not.prototype.init = function () {
+            this._queryOperation = createQueryOperation(this.params, this.owneryQuery, this.options);
+        };
+        $Not.prototype.reset = function () {
+            _super.prototype.reset.call(this);
+            this._queryOperation.reset();
+        };
+        $Not.prototype.next = function (item, key, owner, root) {
+            this._queryOperation.next(item, key, owner, root);
+            this.done = this._queryOperation.done;
+            this.keep = !this._queryOperation.keep;
+        };
+        return $Not;
+    }(BaseOperation));
+    var $Size = /** @class */ (function (_super) {
+        __extends($Size, _super);
+        function $Size() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = true;
+            return _this;
+        }
+        $Size.prototype.init = function () { };
+        $Size.prototype.next = function (item) {
+            if (isArray(item) && item.length === this.params) {
+                this.done = true;
+                this.keep = true;
+            }
+            // if (parent && parent.length === this.params) {
+            //   this.done = true;
+            //   this.keep = true;
+            // }
+        };
+        return $Size;
+    }(BaseOperation));
+    var assertGroupNotEmpty = function (values) {
+        if (values.length === 0) {
+            throw new Error("$and/$or/$nor must be a nonempty array");
+        }
+    };
+    var $Or = /** @class */ (function (_super) {
+        __extends($Or, _super);
+        function $Or() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = false;
+            return _this;
+        }
+        $Or.prototype.init = function () {
+            var _this = this;
+            assertGroupNotEmpty(this.params);
+            this._ops = this.params.map(function (op) {
+                return createQueryOperation(op, null, _this.options);
+            });
+        };
+        $Or.prototype.reset = function () {
+            this.done = false;
+            this.keep = false;
+            for (var i = 0, length_2 = this._ops.length; i < length_2; i++) {
+                this._ops[i].reset();
+            }
+        };
+        $Or.prototype.next = function (item, key, owner) {
+            var done = false;
+            var success = false;
+            for (var i = 0, length_3 = this._ops.length; i < length_3; i++) {
+                var op = this._ops[i];
+                op.next(item, key, owner);
+                if (op.keep) {
+                    done = true;
+                    success = op.keep;
+                    break;
+                }
+            }
+            this.keep = success;
+            this.done = done;
+        };
+        return $Or;
+    }(BaseOperation));
+    var $Nor = /** @class */ (function (_super) {
+        __extends($Nor, _super);
+        function $Nor() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = false;
+            return _this;
+        }
+        $Nor.prototype.next = function (item, key, owner) {
+            _super.prototype.next.call(this, item, key, owner);
+            this.keep = !this.keep;
+        };
+        return $Nor;
+    }($Or));
+    var $In = /** @class */ (function (_super) {
+        __extends($In, _super);
+        function $In() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = true;
+            return _this;
+        }
+        $In.prototype.init = function () {
+            var _this = this;
+            this._testers = this.params.map(function (value) {
+                if (containsOperation(value, _this.options)) {
+                    throw new Error("cannot nest $ under " + _this.name.toLowerCase());
+                }
+                return createTester(value, _this.options.compare);
+            });
+        };
+        $In.prototype.next = function (item, key, owner) {
+            var done = false;
+            var success = false;
+            for (var i = 0, length_4 = this._testers.length; i < length_4; i++) {
+                var test = this._testers[i];
+                if (test(item)) {
+                    done = true;
+                    success = true;
+                    break;
+                }
+            }
+            this.keep = success;
+            this.done = done;
+        };
+        return $In;
+    }(BaseOperation));
+    var $Nin = /** @class */ (function (_super) {
+        __extends($Nin, _super);
+        function $Nin(params, ownerQuery, options, name) {
+            var _this = _super.call(this, params, ownerQuery, options, name) || this;
+            _this.propop = true;
+            _this._in = new $In(params, ownerQuery, options, name);
+            return _this;
+        }
+        $Nin.prototype.next = function (item, key, owner, root) {
+            this._in.next(item, key, owner);
+            if (isArray(owner) && !root) {
+                if (this._in.keep) {
+                    this.keep = false;
+                    this.done = true;
+                }
+                else if (key == owner.length - 1) {
+                    this.keep = true;
+                    this.done = true;
+                }
+            }
+            else {
+                this.keep = !this._in.keep;
+                this.done = true;
+            }
+        };
+        $Nin.prototype.reset = function () {
+            _super.prototype.reset.call(this);
+            this._in.reset();
+        };
+        return $Nin;
+    }(BaseOperation));
+    var $Exists = /** @class */ (function (_super) {
+        __extends($Exists, _super);
+        function $Exists() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = true;
+            return _this;
+        }
+        $Exists.prototype.next = function (item, key, owner) {
+            if (owner.hasOwnProperty(key) === this.params) {
+                this.done = true;
+                this.keep = true;
+            }
+        };
+        return $Exists;
+    }(BaseOperation));
+    var $And = /** @class */ (function (_super) {
+        __extends($And, _super);
+        function $And(params, owneryQuery, options, name) {
+            var _this = _super.call(this, params, owneryQuery, options, params.map(function (query) { return createQueryOperation(query, owneryQuery, options); }), name) || this;
+            _this.propop = false;
+            assertGroupNotEmpty(params);
+            return _this;
+        }
+        $And.prototype.next = function (item, key, owner, root) {
+            this.childrenNext(item, key, owner, root);
+        };
+        return $And;
+    }(NamedGroupOperation));
+    var $All = /** @class */ (function (_super) {
+        __extends($All, _super);
+        function $All(params, owneryQuery, options, name) {
+            var _this = _super.call(this, params, owneryQuery, options, params.map(function (query) { return createQueryOperation(query, owneryQuery, options); }), name) || this;
+            _this.propop = true;
+            return _this;
+        }
+        $All.prototype.next = function (item, key, owner, root) {
+            this.childrenNext(item, key, owner, root);
+        };
+        return $All;
+    }(NamedGroupOperation));
+    var $eq = function (params, owneryQuery, options) {
+        return new EqualsOperation(params, owneryQuery, options);
+    };
+    var $ne = function (params, owneryQuery, options, name) { return new $Ne(params, owneryQuery, options, name); };
+    var $or = function (params, owneryQuery, options, name) { return new $Or(params, owneryQuery, options, name); };
+    var $nor = function (params, owneryQuery, options, name) { return new $Nor(params, owneryQuery, options, name); };
+    var $elemMatch = function (params, owneryQuery, options, name) { return new $ElemMatch(params, owneryQuery, options, name); };
+    var $nin = function (params, owneryQuery, options, name) { return new $Nin(params, owneryQuery, options, name); };
+    var $in = function (params, owneryQuery, options, name) {
+        return new $In(params, owneryQuery, options, name);
+    };
+    var $lt = numericalOperation(function (params) { return function (b) { return b < params; }; });
+    var $lte = numericalOperation(function (params) { return function (b) { return b <= params; }; });
+    var $gt = numericalOperation(function (params) { return function (b) { return b > params; }; });
+    var $gte = numericalOperation(function (params) { return function (b) { return b >= params; }; });
+    var $mod = function (_a, owneryQuery, options) {
+        var mod = _a[0], equalsValue = _a[1];
+        return new EqualsOperation(function (b) { return comparable(b) % mod === equalsValue; }, owneryQuery, options);
+    };
+    var $exists = function (params, owneryQuery, options, name) { return new $Exists(params, owneryQuery, options, name); };
+    var $regex = function (pattern, owneryQuery, options) {
+        return new EqualsOperation(new RegExp(pattern, owneryQuery.$options), owneryQuery, options);
+    };
+    var $not = function (params, owneryQuery, options, name) { return new $Not(params, owneryQuery, options, name); };
+    var typeAliases = {
+        number: function (v) { return typeof v === "number"; },
+        string: function (v) { return typeof v === "string"; },
+        bool: function (v) { return typeof v === "boolean"; },
+        array: function (v) { return Array.isArray(v); },
+        null: function (v) { return v === null; },
+        timestamp: function (v) { return v instanceof Date; }
+    };
+    var $type = function (clazz, owneryQuery, options) {
+        return new EqualsOperation(function (b) {
+            if (typeof clazz === "string") {
+                if (!typeAliases[clazz]) {
+                    throw new Error("Type alias does not exist");
+                }
+                return typeAliases[clazz](b);
+            }
+            return b != null ? b instanceof clazz || b.constructor === clazz : false;
+        }, owneryQuery, options);
+    };
+    var $and = function (params, ownerQuery, options, name) { return new $And(params, ownerQuery, options, name); };
+    var $all = function (params, ownerQuery, options, name) { return new $All(params, ownerQuery, options, name); };
+    var $size = function (params, ownerQuery, options) { return new $Size(params, ownerQuery, options, "$size"); };
+    var $options = function () { return null; };
+    var $where = function (params, ownerQuery, options) {
+        var test;
+        if (isFunction(params)) {
+            test = params;
+        }
+        else if (!process.env.CSP_ENABLED) {
+            test = new Function("obj", "return " + params);
+        }
+        else {
+            throw new Error("In CSP mode, sift does not support strings in \"$where\" condition");
+        }
+        return new EqualsOperation(function (b) { return test.bind(b)(b); }, ownerQuery, options);
+    };
+
+    var defaultOperations = /*#__PURE__*/Object.freeze({
+        __proto__: null,
+        $Size: $Size,
+        $eq: $eq,
+        $ne: $ne,
+        $or: $or,
+        $nor: $nor,
+        $elemMatch: $elemMatch,
+        $nin: $nin,
+        $in: $in,
+        $lt: $lt,
+        $lte: $lte,
+        $gt: $gt,
+        $gte: $gte,
+        $mod: $mod,
+        $exists: $exists,
+        $regex: $regex,
+        $not: $not,
+        $type: $type,
+        $and: $and,
+        $all: $all,
+        $size: $size,
+        $options: $options,
+        $where: $where
+    });
+
+    var createDefaultQueryOperation = function (query, ownerQuery, _a) {
+        var _b = _a === void 0 ? {} : _a, compare = _b.compare, operations = _b.operations;
+        return createQueryOperation(query, ownerQuery, {
+            compare: compare,
+            operations: Object.assign({}, defaultOperations, operations || {})
+        });
+    };
+    var createDefaultQueryTester = function (query, options) {
+        if (options === void 0) { options = {}; }
+        var op = createDefaultQueryOperation(query, null, options);
+        return createOperationTester(op);
+    };
+
+    exports.$Size = $Size;
+    exports.$all = $all;
+    exports.$and = $and;
+    exports.$elemMatch = $elemMatch;
+    exports.$eq = $eq;
+    exports.$exists = $exists;
+    exports.$gt = $gt;
+    exports.$gte = $gte;
+    exports.$in = $in;
+    exports.$lt = $lt;
+    exports.$lte = $lte;
+    exports.$mod = $mod;
+    exports.$ne = $ne;
+    exports.$nin = $nin;
+    exports.$nor = $nor;
+    exports.$not = $not;
+    exports.$options = $options;
+    exports.$or = $or;
+    exports.$regex = $regex;
+    exports.$size = $size;
+    exports.$type = $type;
+    exports.$where = $where;
+    exports.EqualsOperation = EqualsOperation;
+    exports.createDefaultQueryOperation = createDefaultQueryOperation;
+    exports.createEqualsOperation = createEqualsOperation;
+    exports.createOperationTester = createOperationTester;
+    exports.createQueryOperation = createQueryOperation;
+    exports.createQueryTester = createQueryTester;
+    exports.default = createDefaultQueryTester;
+
+    Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+//# sourceMappingURL=index.js.map

node_modules/sift/lib/operations.d.ts

@@ -0,0 +1,88 @@
+import { BaseOperation, EqualsOperation, Options, Operation, Query, NamedGroupOperation } from "./core";
+import { Key } from "./utils";
+declare class $Ne extends BaseOperation<any> {
+    readonly propop = true;
+    private _test;
+    init(): void;
+    reset(): void;
+    next(item: any): void;
+}
+declare class $ElemMatch extends BaseOperation<Query<any>> {
+    readonly propop = true;
+    private _queryOperation;
+    init(): void;
+    reset(): void;
+    next(item: any): void;
+}
+declare class $Not extends BaseOperation<Query<any>> {
+    readonly propop = true;
+    private _queryOperation;
+    init(): void;
+    reset(): void;
+    next(item: any, key: Key, owner: any, root: boolean): void;
+}
+export declare class $Size extends BaseOperation<any> {
+    readonly propop = true;
+    init(): void;
+    next(item: any): void;
+}
+declare class $Or extends BaseOperation<any> {
+    readonly propop = false;
+    private _ops;
+    init(): void;
+    reset(): void;
+    next(item: any, key: Key, owner: any): void;
+}
+declare class $Nor extends $Or {
+    readonly propop = false;
+    next(item: any, key: Key, owner: any): void;
+}
+declare class $In extends BaseOperation<any> {
+    readonly propop = true;
+    private _testers;
+    init(): void;
+    next(item: any, key: Key, owner: any): void;
+}
+declare class $Nin extends BaseOperation<any> {
+    readonly propop = true;
+    private _in;
+    constructor(params: any, ownerQuery: any, options: Options, name: string);
+    next(item: any, key: Key, owner: any, root: boolean): void;
+    reset(): void;
+}
+declare class $Exists extends BaseOperation<boolean> {
+    readonly propop = true;
+    next(item: any, key: Key, owner: any): void;
+}
+declare class $And extends NamedGroupOperation {
+    readonly propop = false;
+    constructor(params: Query<any>[], owneryQuery: Query<any>, options: Options, name: string);
+    next(item: any, key: Key, owner: any, root: boolean): void;
+}
+declare class $All extends NamedGroupOperation {
+    readonly propop = true;
+    constructor(params: Query<any>[], owneryQuery: Query<any>, options: Options, name: string);
+    next(item: any, key: Key, owner: any, root: boolean): void;
+}
+export declare const $eq: (params: any, owneryQuery: Query<any>, options: Options) => EqualsOperation<any>;
+export declare const $ne: (params: any, owneryQuery: Query<any>, options: Options, name: string) => $Ne;
+export declare const $or: (params: Query<any>[], owneryQuery: Query<any>, options: Options, name: string) => $Or;
+export declare const $nor: (params: Query<any>[], owneryQuery: Query<any>, options: Options, name: string) => $Nor;
+export declare const $elemMatch: (params: any, owneryQuery: Query<any>, options: Options, name: string) => $ElemMatch;
+export declare const $nin: (params: any, owneryQuery: Query<any>, options: Options, name: string) => $Nin;
+export declare const $in: (params: any, owneryQuery: Query<any>, options: Options, name: string) => $In;
+export declare const $lt: (params: any, owneryQuery: any, options: Options, name: string) => Operation<any>;
+export declare const $lte: (params: any, owneryQuery: any, options: Options, name: string) => Operation<any>;
+export declare const $gt: (params: any, owneryQuery: any, options: Options, name: string) => Operation<any>;
+export declare const $gte: (params: any, owneryQuery: any, options: Options, name: string) => Operation<any>;
+export declare const $mod: ([mod, equalsValue]: number[], owneryQuery: Query<any>, options: Options) => EqualsOperation<(b: any) => boolean>;
+export declare const $exists: (params: boolean, owneryQuery: Query<any>, options: Options, name: string) => $Exists;
+export declare const $regex: (pattern: string, owneryQuery: Query<any>, options: Options) => EqualsOperation<RegExp>;
+export declare const $not: (params: any, owneryQuery: Query<any>, options: Options, name: string) => $Not;
+export declare const $type: (clazz: Function | string, owneryQuery: Query<any>, options: Options) => EqualsOperation<(b: any) => any>;
+export declare const $and: (params: Query<any>[], ownerQuery: Query<any>, options: Options, name: string) => $And;
+export declare const $all: (params: Query<any>[], ownerQuery: Query<any>, options: Options, name: string) => $All;
+export declare const $size: (params: number, ownerQuery: Query<any>, options: Options) => $Size;
+export declare const $options: () => any;
+export declare const $where: (params: string | Function, ownerQuery: Query<any>, options: Options) => EqualsOperation<(b: any) => any>;
+export {};

node_modules/sift/lib/utils.d.ts

@@ -0,0 +1,9 @@
+export declare type Key = string | number;
+export declare type Comparator = (a: any, b: any) => boolean;
+export declare const typeChecker: <TType>(type: any) => (value: any) => value is TType;
+export declare const comparable: (value: any) => any;
+export declare const isArray: (value: any) => value is any[];
+export declare const isObject: (value: any) => value is Object;
+export declare const isFunction: (value: any) => value is Function;
+export declare const isVanillaObject: (value: any) => boolean;
+export declare const equals: (a: any, b: any) => boolean;

node_modules/sift/package.json

@@ -0,0 +1,62 @@
+{
+  "name": "sift",
+  "description": "MongoDB query filtering in JavaScript",
+  "version": "16.0.1",
+  "repository": "crcn/sift.js",
+  "sideEffects": false,
+  "author": {
+    "name": "Craig Condon",
+    "email": "craig.j.condon@gmail.com"
+  },
+  "license": "MIT",
+  "engines": {},
+  "typings": "./index.d.ts",
+  "husky": {
+    "hooks": {
+      "pre-commit": "pretty-quick --staged"
+    }
+  },
+  "devDependencies": {
+    "@rollup/plugin-replace": "^2.3.2",
+    "@rollup/plugin-typescript": "8.2.1",
+    "@types/node": "^13.7.0",
+    "bson": "^4.0.3",
+    "eval": "^0.1.4",
+    "husky": "^1.2.1",
+    "immutable": "^3.7.6",
+    "mocha": "8.3.2",
+    "mongodb": "^3.6.6",
+    "prettier": "1.15.3",
+    "pretty-quick": "^1.11.1",
+    "rimraf": "^3.0.2",
+    "rollup": "^2.7.2",
+    "rollup-plugin-terser": "^7.0.2",
+    "tslib": "2.2.0",
+    "typescript": "4.2.4"
+  },
+  "main": "./index.js",
+  "module": "./es5m/index.js",
+  "es2015": "./es/index.js",
+  "scripts": {
+    "clean": "rimraf lib es5m es",
+    "prebuild": "npm run clean && npm run build:types",
+    "build": "rollup -c",
+    "build:types": "tsc -p tsconfig.json --emitDeclarationOnly --outDir lib",
+    "test": "npm run test:spec && npm run test:types",
+    "test:spec": "mocha ./test -R spec",
+    "test:types": "cd test && tsc types.ts --noEmit",
+    "prepublishOnly": "npm run build && npm run test"
+  },
+  "files": [
+    "es",
+    "es5m",
+    "lib",
+    "src",
+    "*.d.ts",
+    "*.js.map",
+    "index.js",
+    "sift.csp.min.js",
+    "sift.min.js",
+    "MIT-LICENSE.txt"
+  ]
+}

node_modules/sift/sift.csp.min.js

@@ -0,0 +1,763 @@
+(function (global, factory) {
+    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+    typeof define === 'function' && define.amd ? define(['exports'], factory) :
+    (global = global || self, factory(global.sift = {}));
+}(this, (function (exports) { 'use strict';
+
+    /*! *****************************************************************************
+    Copyright (c) Microsoft Corporation.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose with or without fee is hereby granted.
+
+    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+    REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+    AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+    INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+    LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+    OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+    PERFORMANCE OF THIS SOFTWARE.
+    ***************************************************************************** */
+    /* global Reflect, Promise */
+
+    var extendStatics = function(d, b) {
+        extendStatics = Object.setPrototypeOf ||
+            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
+        return extendStatics(d, b);
+    };
+
+    function __extends(d, b) {
+        if (typeof b !== "function" && b !== null)
+            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
+        extendStatics(d, b);
+        function __() { this.constructor = d; }
+        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+    }
+
+    var typeChecker = function (type) {
+        var typeString = "[object " + type + "]";
+        return function (value) {
+            return getClassName(value) === typeString;
+        };
+    };
+    var getClassName = function (value) { return Object.prototype.toString.call(value); };
+    var comparable = function (value) {
+        if (value instanceof Date) {
+            return value.getTime();
+        }
+        else if (isArray(value)) {
+            return value.map(comparable);
+        }
+        else if (value && typeof value.toJSON === "function") {
+            return value.toJSON();
+        }
+        return value;
+    };
+    var isArray = typeChecker("Array");
+    var isObject = typeChecker("Object");
+    var isFunction = typeChecker("Function");
+    var isVanillaObject = function (value) {
+        return (value &&
+            (value.constructor === Object ||
+                value.constructor === Array ||
+                value.constructor.toString() === "function Object() { [native code] }" ||
+                value.constructor.toString() === "function Array() { [native code] }") &&
+            !value.toJSON);
+    };
+    var equals = function (a, b) {
+        if (a == null && a == b) {
+            return true;
+        }
+        if (a === b) {
+            return true;
+        }
+        if (Object.prototype.toString.call(a) !== Object.prototype.toString.call(b)) {
+            return false;
+        }
+        if (isArray(a)) {
+            if (a.length !== b.length) {
+                return false;
+            }
+            for (var i = 0, length_1 = a.length; i < length_1; i++) {
+                if (!equals(a[i], b[i]))
+                    return false;
+            }
+            return true;
+        }
+        else if (isObject(a)) {
+            if (Object.keys(a).length !== Object.keys(b).length) {
+                return false;
+            }
+            for (var key in a) {
+                if (!equals(a[key], b[key]))
+                    return false;
+            }
+            return true;
+        }
+        return false;
+    };
+
+    /**
+     * Walks through each value given the context - used for nested operations. E.g:
+     * { "person.address": { $eq: "blarg" }}
+     */
+    var walkKeyPathValues = function (item, keyPath, next, depth, key, owner) {
+        var currentKey = keyPath[depth];
+        // if array, then try matching. Might fall through for cases like:
+        // { $eq: [1, 2, 3] }, [ 1, 2, 3 ].
+        if (isArray(item) && isNaN(Number(currentKey))) {
+            for (var i = 0, length_1 = item.length; i < length_1; i++) {
+                // if FALSE is returned, then terminate walker. For operations, this simply
+                // means that the search critera was met.
+                if (!walkKeyPathValues(item[i], keyPath, next, depth, i, item)) {
+                    return false;
+                }
+            }
+        }
+        if (depth === keyPath.length || item == null) {
+            return next(item, key, owner, depth === 0);
+        }
+        return walkKeyPathValues(item[currentKey], keyPath, next, depth + 1, currentKey, item);
+    };
+    var BaseOperation = /** @class */ (function () {
+        function BaseOperation(params, owneryQuery, options, name) {
+            this.params = params;
+            this.owneryQuery = owneryQuery;
+            this.options = options;
+            this.name = name;
+            this.init();
+        }
+        BaseOperation.prototype.init = function () { };
+        BaseOperation.prototype.reset = function () {
+            this.done = false;
+            this.keep = false;
+        };
+        return BaseOperation;
+    }());
+    var GroupOperation = /** @class */ (function (_super) {
+        __extends(GroupOperation, _super);
+        function GroupOperation(params, owneryQuery, options, children) {
+            var _this = _super.call(this, params, owneryQuery, options) || this;
+            _this.children = children;
+            return _this;
+        }
+        /**
+         */
+        GroupOperation.prototype.reset = function () {
+            this.keep = false;
+            this.done = false;
+            for (var i = 0, length_2 = this.children.length; i < length_2; i++) {
+                this.children[i].reset();
+            }
+        };
+        /**
+         */
+        GroupOperation.prototype.childrenNext = function (item, key, owner, root) {
+            var done = true;
+            var keep = true;
+            for (var i = 0, length_3 = this.children.length; i < length_3; i++) {
+                var childOperation = this.children[i];
+                if (!childOperation.done) {
+                    childOperation.next(item, key, owner, root);
+                }
+                if (!childOperation.keep) {
+                    keep = false;
+                }
+                if (childOperation.done) {
+                    if (!childOperation.keep) {
+                        break;
+                    }
+                }
+                else {
+                    done = false;
+                }
+            }
+            this.done = done;
+            this.keep = keep;
+        };
+        return GroupOperation;
+    }(BaseOperation));
+    var NamedGroupOperation = /** @class */ (function (_super) {
+        __extends(NamedGroupOperation, _super);
+        function NamedGroupOperation(params, owneryQuery, options, children, name) {
+            var _this = _super.call(this, params, owneryQuery, options, children) || this;
+            _this.name = name;
+            return _this;
+        }
+        return NamedGroupOperation;
+    }(GroupOperation));
+    var QueryOperation = /** @class */ (function (_super) {
+        __extends(QueryOperation, _super);
+        function QueryOperation() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = true;
+            return _this;
+        }
+        /**
+         */
+        QueryOperation.prototype.next = function (item, key, parent, root) {
+            this.childrenNext(item, key, parent, root);
+        };
+        return QueryOperation;
+    }(GroupOperation));
+    var NestedOperation = /** @class */ (function (_super) {
+        __extends(NestedOperation, _super);
+        function NestedOperation(keyPath, params, owneryQuery, options, children) {
+            var _this = _super.call(this, params, owneryQuery, options, children) || this;
+            _this.keyPath = keyPath;
+            _this.propop = true;
+            /**
+             */
+            _this._nextNestedValue = function (value, key, owner, root) {
+                _this.childrenNext(value, key, owner, root);
+                return !_this.done;
+            };
+            return _this;
+        }
+        /**
+         */
+        NestedOperation.prototype.next = function (item, key, parent) {
+            walkKeyPathValues(item, this.keyPath, this._nextNestedValue, 0, key, parent);
+        };
+        return NestedOperation;
+    }(GroupOperation));
+    var createTester = function (a, compare) {
+        if (a instanceof Function) {
+            return a;
+        }
+        if (a instanceof RegExp) {
+            return function (b) {
+                var result = typeof b === "string" && a.test(b);
+                a.lastIndex = 0;
+                return result;
+            };
+        }
+        var comparableA = comparable(a);
+        return function (b) { return compare(comparableA, comparable(b)); };
+    };
+    var EqualsOperation = /** @class */ (function (_super) {
+        __extends(EqualsOperation, _super);
+        function EqualsOperation() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = true;
+            return _this;
+        }
+        EqualsOperation.prototype.init = function () {
+            this._test = createTester(this.params, this.options.compare);
+        };
+        EqualsOperation.prototype.next = function (item, key, parent) {
+            if (!Array.isArray(parent) || parent.hasOwnProperty(key)) {
+                if (this._test(item, key, parent)) {
+                    this.done = true;
+                    this.keep = true;
+                }
+            }
+        };
+        return EqualsOperation;
+    }(BaseOperation));
+    var createEqualsOperation = function (params, owneryQuery, options) { return new EqualsOperation(params, owneryQuery, options); };
+    var NopeOperation = /** @class */ (function (_super) {
+        __extends(NopeOperation, _super);
+        function NopeOperation() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = true;
+            return _this;
+        }
+        NopeOperation.prototype.next = function () {
+            this.done = true;
+            this.keep = false;
+        };
+        return NopeOperation;
+    }(BaseOperation));
+    var numericalOperationCreator = function (createNumericalOperation) { return function (params, owneryQuery, options, name) {
+        if (params == null) {
+            return new NopeOperation(params, owneryQuery, options, name);
+        }
+        return createNumericalOperation(params, owneryQuery, options, name);
+    }; };
+    var numericalOperation = function (createTester) {
+        return numericalOperationCreator(function (params, owneryQuery, options, name) {
+            var typeofParams = typeof comparable(params);
+            var test = createTester(params);
+            return new EqualsOperation(function (b) {
+                return typeof comparable(b) === typeofParams && test(b);
+            }, owneryQuery, options, name);
+        });
+    };
+    var createNamedOperation = function (name, params, parentQuery, options) {
+        var operationCreator = options.operations[name];
+        if (!operationCreator) {
+            throwUnsupportedOperation(name);
+        }
+        return operationCreator(params, parentQuery, options, name);
+    };
+    var throwUnsupportedOperation = function (name) {
+        throw new Error("Unsupported operation: " + name);
+    };
+    var containsOperation = function (query, options) {
+        for (var key in query) {
+            if (options.operations.hasOwnProperty(key) || key.charAt(0) === "$")
+                return true;
+        }
+        return false;
+    };
+    var createNestedOperation = function (keyPath, nestedQuery, parentKey, owneryQuery, options) {
+        if (containsOperation(nestedQuery, options)) {
+            var _a = createQueryOperations(nestedQuery, parentKey, options), selfOperations = _a[0], nestedOperations = _a[1];
+            if (nestedOperations.length) {
+                throw new Error("Property queries must contain only operations, or exact objects.");
+            }
+            return new NestedOperation(keyPath, nestedQuery, owneryQuery, options, selfOperations);
+        }
+        return new NestedOperation(keyPath, nestedQuery, owneryQuery, options, [
+            new EqualsOperation(nestedQuery, owneryQuery, options)
+        ]);
+    };
+    var createQueryOperation = function (query, owneryQuery, _a) {
+        if (owneryQuery === void 0) { owneryQuery = null; }
+        var _b = _a === void 0 ? {} : _a, compare = _b.compare, operations = _b.operations;
+        var options = {
+            compare: compare || equals,
+            operations: Object.assign({}, operations || {})
+        };
+        var _c = createQueryOperations(query, null, options), selfOperations = _c[0], nestedOperations = _c[1];
+        var ops = [];
+        if (selfOperations.length) {
+            ops.push(new NestedOperation([], query, owneryQuery, options, selfOperations));
+        }
+        ops.push.apply(ops, nestedOperations);
+        if (ops.length === 1) {
+            return ops[0];
+        }
+        return new QueryOperation(query, owneryQuery, options, ops);
+    };
+    var createQueryOperations = function (query, parentKey, options) {
+        var selfOperations = [];
+        var nestedOperations = [];
+        if (!isVanillaObject(query)) {
+            selfOperations.push(new EqualsOperation(query, query, options));
+            return [selfOperations, nestedOperations];
+        }
+        for (var key in query) {
+            if (options.operations.hasOwnProperty(key)) {
+                var op = createNamedOperation(key, query[key], query, options);
+                if (op) {
+                    if (!op.propop && parentKey && !options.operations[parentKey]) {
+                        throw new Error("Malformed query. " + key + " cannot be matched against property.");
+                    }
+                }
+                // probably just a flag for another operation (like $options)
+                if (op != null) {
+                    selfOperations.push(op);
+                }
+            }
+            else if (key.charAt(0) === "$") {
+                throwUnsupportedOperation(key);
+            }
+            else {
+                nestedOperations.push(createNestedOperation(key.split("."), query[key], key, query, options));
+            }
+        }
+        return [selfOperations, nestedOperations];
+    };
+    var createOperationTester = function (operation) { return function (item, key, owner) {
+        operation.reset();
+        operation.next(item, key, owner);
+        return operation.keep;
+    }; };
+    var createQueryTester = function (query, options) {
+        if (options === void 0) { options = {}; }
+        return createOperationTester(createQueryOperation(query, null, options));
+    };
+
+    var $Ne = /** @class */ (function (_super) {
+        __extends($Ne, _super);
+        function $Ne() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = true;
+            return _this;
+        }
+        $Ne.prototype.init = function () {
+            this._test = createTester(this.params, this.options.compare);
+        };
+        $Ne.prototype.reset = function () {
+            _super.prototype.reset.call(this);
+            this.keep = true;
+        };
+        $Ne.prototype.next = function (item) {
+            if (this._test(item)) {
+                this.done = true;
+                this.keep = false;
+            }
+        };
+        return $Ne;
+    }(BaseOperation));
+    // https://docs.mongodb.com/manual/reference/operator/query/elemMatch/
+    var $ElemMatch = /** @class */ (function (_super) {
+        __extends($ElemMatch, _super);
+        function $ElemMatch() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = true;
+            return _this;
+        }
+        $ElemMatch.prototype.init = function () {
+            if (!this.params || typeof this.params !== "object") {
+                throw new Error("Malformed query. $elemMatch must by an object.");
+            }
+            this._queryOperation = createQueryOperation(this.params, this.owneryQuery, this.options);
+        };
+        $ElemMatch.prototype.reset = function () {
+            _super.prototype.reset.call(this);
+            this._queryOperation.reset();
+        };
+        $ElemMatch.prototype.next = function (item) {
+            if (isArray(item)) {
+                for (var i = 0, length_1 = item.length; i < length_1; i++) {
+                    // reset query operation since item being tested needs to pass _all_ query
+                    // operations for it to be a success
+                    this._queryOperation.reset();
+                    var child = item[i];
+                    this._queryOperation.next(child, i, item, false);
+                    this.keep = this.keep || this._queryOperation.keep;
+                }
+                this.done = true;
+            }
+            else {
+                this.done = false;
+                this.keep = false;
+            }
+        };
+        return $ElemMatch;
+    }(BaseOperation));
+    var $Not = /** @class */ (function (_super) {
+        __extends($Not, _super);
+        function $Not() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = true;
+            return _this;
+        }
+        $Not.prototype.init = function () {
+            this._queryOperation = createQueryOperation(this.params, this.owneryQuery, this.options);
+        };
+        $Not.prototype.reset = function () {
+            _super.prototype.reset.call(this);
+            this._queryOperation.reset();
+        };
+        $Not.prototype.next = function (item, key, owner, root) {
+            this._queryOperation.next(item, key, owner, root);
+            this.done = this._queryOperation.done;
+            this.keep = !this._queryOperation.keep;
+        };
+        return $Not;
+    }(BaseOperation));
+    var $Size = /** @class */ (function (_super) {
+        __extends($Size, _super);
+        function $Size() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = true;
+            return _this;
+        }
+        $Size.prototype.init = function () { };
+        $Size.prototype.next = function (item) {
+            if (isArray(item) && item.length === this.params) {
+                this.done = true;
+                this.keep = true;
+            }
+            // if (parent && parent.length === this.params) {
+            //   this.done = true;
+            //   this.keep = true;
+            // }
+        };
+        return $Size;
+    }(BaseOperation));
+    var assertGroupNotEmpty = function (values) {
+        if (values.length === 0) {
+            throw new Error("$and/$or/$nor must be a nonempty array");
+        }
+    };
+    var $Or = /** @class */ (function (_super) {
+        __extends($Or, _super);
+        function $Or() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = false;
+            return _this;
+        }
+        $Or.prototype.init = function () {
+            var _this = this;
+            assertGroupNotEmpty(this.params);
+            this._ops = this.params.map(function (op) {
+                return createQueryOperation(op, null, _this.options);
+            });
+        };
+        $Or.prototype.reset = function () {
+            this.done = false;
+            this.keep = false;
+            for (var i = 0, length_2 = this._ops.length; i < length_2; i++) {
+                this._ops[i].reset();
+            }
+        };
+        $Or.prototype.next = function (item, key, owner) {
+            var done = false;
+            var success = false;
+            for (var i = 0, length_3 = this._ops.length; i < length_3; i++) {
+                var op = this._ops[i];
+                op.next(item, key, owner);
+                if (op.keep) {
+                    done = true;
+                    success = op.keep;
+                    break;
+                }
+            }
+            this.keep = success;
+            this.done = done;
+        };
+        return $Or;
+    }(BaseOperation));
+    var $Nor = /** @class */ (function (_super) {
+        __extends($Nor, _super);
+        function $Nor() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = false;
+            return _this;
+        }
+        $Nor.prototype.next = function (item, key, owner) {
+            _super.prototype.next.call(this, item, key, owner);
+            this.keep = !this.keep;
+        };
+        return $Nor;
+    }($Or));
+    var $In = /** @class */ (function (_super) {
+        __extends($In, _super);
+        function $In() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = true;
+            return _this;
+        }
+        $In.prototype.init = function () {
+            var _this = this;
+            this._testers = this.params.map(function (value) {
+                if (containsOperation(value, _this.options)) {
+                    throw new Error("cannot nest $ under " + _this.name.toLowerCase());
+                }
+                return createTester(value, _this.options.compare);
+            });
+        };
+        $In.prototype.next = function (item, key, owner) {
+            var done = false;
+            var success = false;
+            for (var i = 0, length_4 = this._testers.length; i < length_4; i++) {
+                var test = this._testers[i];
+                if (test(item)) {
+                    done = true;
+                    success = true;
+                    break;
+                }
+            }
+            this.keep = success;
+            this.done = done;
+        };
+        return $In;
+    }(BaseOperation));
+    var $Nin = /** @class */ (function (_super) {
+        __extends($Nin, _super);
+        function $Nin(params, ownerQuery, options, name) {
+            var _this = _super.call(this, params, ownerQuery, options, name) || this;
+            _this.propop = true;
+            _this._in = new $In(params, ownerQuery, options, name);
+            return _this;
+        }
+        $Nin.prototype.next = function (item, key, owner, root) {
+            this._in.next(item, key, owner);
+            if (isArray(owner) && !root) {
+                if (this._in.keep) {
+                    this.keep = false;
+                    this.done = true;
+                }
+                else if (key == owner.length - 1) {
+                    this.keep = true;
+                    this.done = true;
+                }
+            }
+            else {
+                this.keep = !this._in.keep;
+                this.done = true;
+            }
+        };
+        $Nin.prototype.reset = function () {
+            _super.prototype.reset.call(this);
+            this._in.reset();
+        };
+        return $Nin;
+    }(BaseOperation));
+    var $Exists = /** @class */ (function (_super) {
+        __extends($Exists, _super);
+        function $Exists() {
+            var _this = _super !== null && _super.apply(this, arguments) || this;
+            _this.propop = true;
+            return _this;
+        }
+        $Exists.prototype.next = function (item, key, owner) {
+            if (owner.hasOwnProperty(key) === this.params) {
+                this.done = true;
+                this.keep = true;
+            }
+        };
+        return $Exists;
+    }(BaseOperation));
+    var $And = /** @class */ (function (_super) {
+        __extends($And, _super);
+        function $And(params, owneryQuery, options, name) {
+            var _this = _super.call(this, params, owneryQuery, options, params.map(function (query) { return createQueryOperation(query, owneryQuery, options); }), name) || this;
+            _this.propop = false;
+            assertGroupNotEmpty(params);
+            return _this;
+        }
+        $And.prototype.next = function (item, key, owner, root) {
+            this.childrenNext(item, key, owner, root);
+        };
+        return $And;
+    }(NamedGroupOperation));
+    var $All = /** @class */ (function (_super) {
+        __extends($All, _super);
+        function $All(params, owneryQuery, options, name) {
+            var _this = _super.call(this, params, owneryQuery, options, params.map(function (query) { return createQueryOperation(query, owneryQuery, options); }), name) || this;
+            _this.propop = true;
+            return _this;
+        }
+        $All.prototype.next = function (item, key, owner, root) {
+            this.childrenNext(item, key, owner, root);
+        };
+        return $All;
+    }(NamedGroupOperation));
+    var $eq = function (params, owneryQuery, options) {
+        return new EqualsOperation(params, owneryQuery, options);
+    };
+    var $ne = function (params, owneryQuery, options, name) { return new $Ne(params, owneryQuery, options, name); };
+    var $or = function (params, owneryQuery, options, name) { return new $Or(params, owneryQuery, options, name); };
+    var $nor = function (params, owneryQuery, options, name) { return new $Nor(params, owneryQuery, options, name); };
+    var $elemMatch = function (params, owneryQuery, options, name) { return new $ElemMatch(params, owneryQuery, options, name); };
+    var $nin = function (params, owneryQuery, options, name) { return new $Nin(params, owneryQuery, options, name); };
+    var $in = function (params, owneryQuery, options, name) {
+        return new $In(params, owneryQuery, options, name);
+    };
+    var $lt = numericalOperation(function (params) { return function (b) { return b < params; }; });
+    var $lte = numericalOperation(function (params) { return function (b) { return b <= params; }; });
+    var $gt = numericalOperation(function (params) { return function (b) { return b > params; }; });
+    var $gte = numericalOperation(function (params) { return function (b) { return b >= params; }; });
+    var $mod = function (_a, owneryQuery, options) {
+        var mod = _a[0], equalsValue = _a[1];
+        return new EqualsOperation(function (b) { return comparable(b) % mod === equalsValue; }, owneryQuery, options);
+    };
+    var $exists = function (params, owneryQuery, options, name) { return new $Exists(params, owneryQuery, options, name); };
+    var $regex = function (pattern, owneryQuery, options) {
+        return new EqualsOperation(new RegExp(pattern, owneryQuery.$options), owneryQuery, options);
+    };
+    var $not = function (params, owneryQuery, options, name) { return new $Not(params, owneryQuery, options, name); };
+    var typeAliases = {
+        number: function (v) { return typeof v === "number"; },
+        string: function (v) { return typeof v === "string"; },
+        bool: function (v) { return typeof v === "boolean"; },
+        array: function (v) { return Array.isArray(v); },
+        null: function (v) { return v === null; },
+        timestamp: function (v) { return v instanceof Date; }
+    };
+    var $type = function (clazz, owneryQuery, options) {
+        return new EqualsOperation(function (b) {
+            if (typeof clazz === "string") {
+                if (!typeAliases[clazz]) {
+                    throw new Error("Type alias does not exist");
+                }
+                return typeAliases[clazz](b);
+            }
+            return b != null ? b instanceof clazz || b.constructor === clazz : false;
+        }, owneryQuery, options);
+    };
+    var $and = function (params, ownerQuery, options, name) { return new $And(params, ownerQuery, options, name); };
+    var $all = function (params, ownerQuery, options, name) { return new $All(params, ownerQuery, options, name); };
+    var $size = function (params, ownerQuery, options) { return new $Size(params, ownerQuery, options, "$size"); };
+    var $options = function () { return null; };
+    var $where = function (params, ownerQuery, options) {
+        var test;
+        if (isFunction(params)) {
+            test = params;
+        }
+        else {
+            throw new Error("In CSP mode, sift does not support strings in \"$where\" condition");
+        }
+        return new EqualsOperation(function (b) { return test.bind(b)(b); }, ownerQuery, options);
+    };
+
+    var defaultOperations = /*#__PURE__*/Object.freeze({
+        __proto__: null,
+        $Size: $Size,
+        $eq: $eq,
+        $ne: $ne,
+        $or: $or,
+        $nor: $nor,
+        $elemMatch: $elemMatch,
+        $nin: $nin,
+        $in: $in,
+        $lt: $lt,
+        $lte: $lte,
+        $gt: $gt,
+        $gte: $gte,
+        $mod: $mod,
+        $exists: $exists,
+        $regex: $regex,
+        $not: $not,
+        $type: $type,
+        $and: $and,
+        $all: $all,
+        $size: $size,
+        $options: $options,
+        $where: $where
+    });
+
+    var createDefaultQueryOperation = function (query, ownerQuery, _a) {
+        var _b = _a === void 0 ? {} : _a, compare = _b.compare, operations = _b.operations;
+        return createQueryOperation(query, ownerQuery, {
+            compare: compare,
+            operations: Object.assign({}, defaultOperations, operations || {})
+        });
+    };
+    var createDefaultQueryTester = function (query, options) {
+        if (options === void 0) { options = {}; }
+        var op = createDefaultQueryOperation(query, null, options);
+        return createOperationTester(op);
+    };
+
+    exports.$Size = $Size;
+    exports.$all = $all;
+    exports.$and = $and;
+    exports.$elemMatch = $elemMatch;
+    exports.$eq = $eq;
+    exports.$exists = $exists;
+    exports.$gt = $gt;
+    exports.$gte = $gte;
+    exports.$in = $in;
+    exports.$lt = $lt;
+    exports.$lte = $lte;
+    exports.$mod = $mod;
+    exports.$ne = $ne;
+    exports.$nin = $nin;
+    exports.$nor = $nor;
+    exports.$not = $not;
+    exports.$options = $options;
+    exports.$or = $or;
+    exports.$regex = $regex;
+    exports.$size = $size;
+    exports.$type = $type;
+    exports.$where = $where;
+    exports.EqualsOperation = EqualsOperation;
+    exports.createDefaultQueryOperation = createDefaultQueryOperation;
+    exports.createEqualsOperation = createEqualsOperation;
+    exports.createOperationTester = createOperationTester;
+    exports.createQueryOperation = createQueryOperation;
+    exports.createQueryTester = createQueryTester;
+    exports.default = createDefaultQueryTester;
+
+    Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+//# sourceMappingURL=sift.csp.min.js.map

node_modules/sift/src/core.d.ts

@@ -0,0 +1,120 @@
+import { Key, Comparator } from "./utils";
+export interface Operation<TItem> {
+    readonly keep: boolean;
+    readonly done: boolean;
+    propop: boolean;
+    reset(): any;
+    next(item: TItem, key?: Key, owner?: any, root?: boolean): any;
+}
+export declare type Tester = (item: any, key?: Key, owner?: any, root?: boolean) => boolean;
+export interface NamedOperation {
+    name: string;
+}
+export declare type OperationCreator<TItem> = (params: any, parentQuery: any, options: Options, name: string) => Operation<TItem>;
+export declare type BasicValueQuery<TValue> = {
+    $eq?: TValue;
+    $ne?: TValue;
+    $lt?: TValue;
+    $gt?: TValue;
+    $lte?: TValue;
+    $gte?: TValue;
+    $in?: TValue[];
+    $nin?: TValue[];
+    $all?: TValue[];
+    $mod?: [number, number];
+    $exists?: boolean;
+    $regex?: string | RegExp;
+    $size?: number;
+    $where?: ((this: TValue, obj: TValue) => boolean) | string;
+    $options?: "i" | "g" | "m" | "u";
+    $type?: Function;
+    $not?: NestedQuery<TValue>;
+    $or?: NestedQuery<TValue>[];
+    $nor?: NestedQuery<TValue>[];
+    $and?: NestedQuery<TValue>[];
+};
+export declare type ArrayValueQuery<TValue> = {
+    $elemMatch?: Query<TValue>;
+} & BasicValueQuery<TValue>;
+declare type Unpacked<T> = T extends (infer U)[] ? U : T;
+export declare type ValueQuery<TValue> = TValue extends Array<any> ? ArrayValueQuery<Unpacked<TValue>> : BasicValueQuery<TValue>;
+declare type NotObject = string | number | Date | boolean | Array<any>;
+export declare type ShapeQuery<TItemSchema> = TItemSchema extends NotObject ? {} : {
+    [k in keyof TItemSchema]?: TItemSchema[k] | ValueQuery<TItemSchema[k]>;
+};
+export declare type NestedQuery<TItemSchema> = ValueQuery<TItemSchema> & ShapeQuery<TItemSchema>;
+export declare type Query<TItemSchema> = TItemSchema | RegExp | NestedQuery<TItemSchema>;
+export declare type QueryOperators<TValue = any> = keyof ValueQuery<TValue>;
+export declare abstract class BaseOperation<TParams, TItem = any> implements Operation<TItem> {
+    readonly params: TParams;
+    readonly owneryQuery: any;
+    readonly options: Options;
+    readonly name?: string;
+    keep: boolean;
+    done: boolean;
+    abstract propop: boolean;
+    constructor(params: TParams, owneryQuery: any, options: Options, name?: string);
+    protected init(): void;
+    reset(): void;
+    abstract next(item: any, key: Key, parent: any, root: boolean): any;
+}
+declare abstract class GroupOperation extends BaseOperation<any> {
+    readonly children: Operation<any>[];
+    keep: boolean;
+    done: boolean;
+    constructor(params: any, owneryQuery: any, options: Options, children: Operation<any>[]);
+    /**
+     */
+    reset(): void;
+    abstract next(item: any, key: Key, owner: any, root: boolean): any;
+    /**
+     */
+    protected childrenNext(item: any, key: Key, owner: any, root: boolean): void;
+}
+export declare abstract class NamedGroupOperation extends GroupOperation implements NamedOperation {
+    readonly name: string;
+    abstract propop: boolean;
+    constructor(params: any, owneryQuery: any, options: Options, children: Operation<any>[], name: string);
+}
+export declare class QueryOperation<TItem> extends GroupOperation {
+    readonly propop = true;
+    /**
+     */
+    next(item: TItem, key: Key, parent: any, root: boolean): void;
+}
+export declare class NestedOperation extends GroupOperation {
+    readonly keyPath: Key[];
+    readonly propop = true;
+    constructor(keyPath: Key[], params: any, owneryQuery: any, options: Options, children: Operation<any>[]);
+    /**
+     */
+    next(item: any, key: Key, parent: any): void;
+    /**
+     */
+    private _nextNestedValue;
+}
+export declare const createTester: (a: any, compare: Comparator) => any;
+export declare class EqualsOperation<TParam> extends BaseOperation<TParam> {
+    readonly propop = true;
+    private _test;
+    init(): void;
+    next(item: any, key: Key, parent: any): void;
+}
+export declare const createEqualsOperation: (params: any, owneryQuery: any, options: Options) => EqualsOperation<any>;
+export declare class NopeOperation<TParam> extends BaseOperation<TParam> {
+    readonly propop = true;
+    next(): void;
+}
+export declare const numericalOperationCreator: (createNumericalOperation: OperationCreator<any>) => (params: any, owneryQuery: any, options: Options, name: string) => Operation<any> | NopeOperation<any>;
+export declare const numericalOperation: (createTester: (any: any) => Tester) => (params: any, owneryQuery: any, options: Options, name: string) => Operation<any> | NopeOperation<any>;
+export declare type Options = {
+    operations: {
+        [identifier: string]: OperationCreator<any>;
+    };
+    compare: (a: any, b: any) => boolean;
+};
+export declare const containsOperation: (query: any, options: Options) => boolean;
+export declare const createQueryOperation: <TItem, TSchema = TItem>(query: Query<TSchema>, owneryQuery?: any, { compare, operations }?: Partial<Options>) => QueryOperation<TItem>;
+export declare const createOperationTester: <TItem>(operation: Operation<TItem>) => (item: TItem, key?: Key, owner?: any) => boolean;
+export declare const createQueryTester: <TItem, TSchema = TItem>(query: Query<TSchema>, options?: Partial<Options>) => (item: TItem, key?: Key, owner?: any) => boolean;
+export {};

node_modules/sift/src/core.js

@@ -0,0 +1,267 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.createQueryTester = exports.createOperationTester = exports.createQueryOperation = exports.containsOperation = exports.numericalOperation = exports.numericalOperationCreator = exports.NopeOperation = exports.createEqualsOperation = exports.EqualsOperation = exports.createTester = exports.NestedOperation = exports.QueryOperation = exports.NamedGroupOperation = exports.BaseOperation = void 0;
+const utils_1 = require("./utils");
+/**
+ * Walks through each value given the context - used for nested operations. E.g:
+ * { "person.address": { $eq: "blarg" }}
+ */
+const walkKeyPathValues = (item, keyPath, next, depth, key, owner) => {
+    const currentKey = keyPath[depth];
+    // if array, then try matching. Might fall through for cases like:
+    // { $eq: [1, 2, 3] }, [ 1, 2, 3 ].
+    if ((0, utils_1.isArray)(item) && isNaN(Number(currentKey))) {
+        for (let i = 0, { length } = item; i < length; i++) {
+            // if FALSE is returned, then terminate walker. For operations, this simply
+            // means that the search critera was met.
+            if (!walkKeyPathValues(item[i], keyPath, next, depth, i, item)) {
+                return false;
+            }
+        }
+    }
+    if (depth === keyPath.length || item == null) {
+        return next(item, key, owner, depth === 0);
+    }
+    return walkKeyPathValues(item[currentKey], keyPath, next, depth + 1, currentKey, item);
+};
+class BaseOperation {
+    constructor(params, owneryQuery, options, name) {
+        this.params = params;
+        this.owneryQuery = owneryQuery;
+        this.options = options;
+        this.name = name;
+        this.init();
+    }
+    init() { }
+    reset() {
+        this.done = false;
+        this.keep = false;
+    }
+}
+exports.BaseOperation = BaseOperation;
+class GroupOperation extends BaseOperation {
+    constructor(params, owneryQuery, options, children) {
+        super(params, owneryQuery, options);
+        this.children = children;
+    }
+    /**
+     */
+    reset() {
+        this.keep = false;
+        this.done = false;
+        for (let i = 0, { length } = this.children; i < length; i++) {
+            this.children[i].reset();
+        }
+    }
+    /**
+     */
+    childrenNext(item, key, owner, root) {
+        let done = true;
+        let keep = true;
+        for (let i = 0, { length } = this.children; i < length; i++) {
+            const childOperation = this.children[i];
+            if (!childOperation.done) {
+                childOperation.next(item, key, owner, root);
+            }
+            if (!childOperation.keep) {
+                keep = false;
+            }
+            if (childOperation.done) {
+                if (!childOperation.keep) {
+                    break;
+                }
+            }
+            else {
+                done = false;
+            }
+        }
+        this.done = done;
+        this.keep = keep;
+    }
+}
+class NamedGroupOperation extends GroupOperation {
+    constructor(params, owneryQuery, options, children, name) {
+        super(params, owneryQuery, options, children);
+        this.name = name;
+    }
+}
+exports.NamedGroupOperation = NamedGroupOperation;
+class QueryOperation extends GroupOperation {
+    constructor() {
+        super(...arguments);
+        this.propop = true;
+    }
+    /**
+     */
+    next(item, key, parent, root) {
+        this.childrenNext(item, key, parent, root);
+    }
+}
+exports.QueryOperation = QueryOperation;
+class NestedOperation extends GroupOperation {
+    constructor(keyPath, params, owneryQuery, options, children) {
+        super(params, owneryQuery, options, children);
+        this.keyPath = keyPath;
+        this.propop = true;
+        /**
+         */
+        this._nextNestedValue = (value, key, owner, root) => {
+            this.childrenNext(value, key, owner, root);
+            return !this.done;
+        };
+    }
+    /**
+     */
+    next(item, key, parent) {
+        walkKeyPathValues(item, this.keyPath, this._nextNestedValue, 0, key, parent);
+    }
+}
+exports.NestedOperation = NestedOperation;
+const createTester = (a, compare) => {
+    if (a instanceof Function) {
+        return a;
+    }
+    if (a instanceof RegExp) {
+        return b => {
+            const result = typeof b === "string" && a.test(b);
+            a.lastIndex = 0;
+            return result;
+        };
+    }
+    const comparableA = (0, utils_1.comparable)(a);
+    return b => compare(comparableA, (0, utils_1.comparable)(b));
+};
+exports.createTester = createTester;
+class EqualsOperation extends BaseOperation {
+    constructor() {
+        super(...arguments);
+        this.propop = true;
+    }
+    init() {
+        this._test = (0, exports.createTester)(this.params, this.options.compare);
+    }
+    next(item, key, parent) {
+        if (!Array.isArray(parent) || parent.hasOwnProperty(key)) {
+            if (this._test(item, key, parent)) {
+                this.done = true;
+                this.keep = true;
+            }
+        }
+    }
+}
+exports.EqualsOperation = EqualsOperation;
+const createEqualsOperation = (params, owneryQuery, options) => new EqualsOperation(params, owneryQuery, options);
+exports.createEqualsOperation = createEqualsOperation;
+class NopeOperation extends BaseOperation {
+    constructor() {
+        super(...arguments);
+        this.propop = true;
+    }
+    next() {
+        this.done = true;
+        this.keep = false;
+    }
+}
+exports.NopeOperation = NopeOperation;
+const numericalOperationCreator = (createNumericalOperation) => (params, owneryQuery, options, name) => {
+    if (params == null) {
+        return new NopeOperation(params, owneryQuery, options, name);
+    }
+    return createNumericalOperation(params, owneryQuery, options, name);
+};
+exports.numericalOperationCreator = numericalOperationCreator;
+const numericalOperation = (createTester) => (0, exports.numericalOperationCreator)((params, owneryQuery, options, name) => {
+    const typeofParams = typeof (0, utils_1.comparable)(params);
+    const test = createTester(params);
+    return new EqualsOperation(b => {
+        return typeof (0, utils_1.comparable)(b) === typeofParams && test(b);
+    }, owneryQuery, options, name);
+});
+exports.numericalOperation = numericalOperation;
+const createNamedOperation = (name, params, parentQuery, options) => {
+    const operationCreator = options.operations[name];
+    if (!operationCreator) {
+        throwUnsupportedOperation(name);
+    }
+    return operationCreator(params, parentQuery, options, name);
+};
+const throwUnsupportedOperation = (name) => {
+    throw new Error(`Unsupported operation: ${name}`);
+};
+const containsOperation = (query, options) => {
+    for (const key in query) {
+        if (options.operations.hasOwnProperty(key) || key.charAt(0) === "$")
+            return true;
+    }
+    return false;
+};
+exports.containsOperation = containsOperation;
+const createNestedOperation = (keyPath, nestedQuery, parentKey, owneryQuery, options) => {
+    if ((0, exports.containsOperation)(nestedQuery, options)) {
+        const [selfOperations, nestedOperations] = createQueryOperations(nestedQuery, parentKey, options);
+        if (nestedOperations.length) {
+            throw new Error(`Property queries must contain only operations, or exact objects.`);
+        }
+        return new NestedOperation(keyPath, nestedQuery, owneryQuery, options, selfOperations);
+    }
+    return new NestedOperation(keyPath, nestedQuery, owneryQuery, options, [
+        new EqualsOperation(nestedQuery, owneryQuery, options)
+    ]);
+};
+const createQueryOperation = (query, owneryQuery = null, { compare, operations } = {}) => {
+    const options = {
+        compare: compare || utils_1.equals,
+        operations: Object.assign({}, operations || {})
+    };
+    const [selfOperations, nestedOperations] = createQueryOperations(query, null, options);
+    const ops = [];
+    if (selfOperations.length) {
+        ops.push(new NestedOperation([], query, owneryQuery, options, selfOperations));
+    }
+    ops.push(...nestedOperations);
+    if (ops.length === 1) {
+        return ops[0];
+    }
+    return new QueryOperation(query, owneryQuery, options, ops);
+};
+exports.createQueryOperation = createQueryOperation;
+const createQueryOperations = (query, parentKey, options) => {
+    const selfOperations = [];
+    const nestedOperations = [];
+    if (!(0, utils_1.isVanillaObject)(query)) {
+        selfOperations.push(new EqualsOperation(query, query, options));
+        return [selfOperations, nestedOperations];
+    }
+    for (const key in query) {
+        if (options.operations.hasOwnProperty(key)) {
+            const op = createNamedOperation(key, query[key], query, options);
+            if (op) {
+                if (!op.propop && parentKey && !options.operations[parentKey]) {
+                    throw new Error(`Malformed query. ${key} cannot be matched against property.`);
+                }
+            }
+            // probably just a flag for another operation (like $options)
+            if (op != null) {
+                selfOperations.push(op);
+            }
+        }
+        else if (key.charAt(0) === "$") {
+            throwUnsupportedOperation(key);
+        }
+        else {
+            nestedOperations.push(createNestedOperation(key.split("."), query[key], key, query, options));
+        }
+    }
+    return [selfOperations, nestedOperations];
+};
+const createOperationTester = (operation) => (item, key, owner) => {
+    operation.reset();
+    operation.next(item, key, owner);
+    return operation.keep;
+};
+exports.createOperationTester = createOperationTester;
+const createQueryTester = (query, options = {}) => {
+    return (0, exports.createOperationTester)((0, exports.createQueryOperation)(query, null, options));
+};
+exports.createQueryTester = createQueryTester;
+//# sourceMappingURL=core.js.map

node_modules/sift/src/core.ts

@@ -0,0 +1,481 @@
+import {
+  isArray,
+  Key,
+  Comparator,
+  isVanillaObject,
+  comparable,
+  equals
+} from "./utils";
+
+export interface Operation<TItem> {
+  readonly keep: boolean;
+  readonly done: boolean;
+  propop: boolean;
+  reset();
+  next(item: TItem, key?: Key, owner?: any, root?: boolean);
+}
+
+export type Tester = (
+  item: any,
+  key?: Key,
+  owner?: any,
+  root?: boolean
+) => boolean;
+
+export interface NamedOperation {
+  name: string;
+}
+
+export type OperationCreator<TItem> = (
+  params: any,
+  parentQuery: any,
+  options: Options,
+  name: string
+) => Operation<TItem>;
+
+export type BasicValueQuery<TValue> = {
+  $eq?: TValue;
+  $ne?: TValue;
+  $lt?: TValue;
+  $gt?: TValue;
+  $lte?: TValue;
+  $gte?: TValue;
+  $in?: TValue[];
+  $nin?: TValue[];
+  $all?: TValue[];
+  $mod?: [number, number];
+  $exists?: boolean;
+  $regex?: string | RegExp;
+  $size?: number;
+  $where?: ((this: TValue, obj: TValue) => boolean) | string;
+  $options?: "i" | "g" | "m" | "u";
+  $type?: Function;
+  $not?: NestedQuery<TValue>;
+  $or?: NestedQuery<TValue>[];
+  $nor?: NestedQuery<TValue>[];
+  $and?: NestedQuery<TValue>[];
+};
+
+export type ArrayValueQuery<TValue> = {
+  $elemMatch?: Query<TValue>;
+} & BasicValueQuery<TValue>;
+type Unpacked<T> = T extends (infer U)[] ? U : T;
+
+export type ValueQuery<TValue> = TValue extends Array<any>
+  ? ArrayValueQuery<Unpacked<TValue>>
+  : BasicValueQuery<TValue>;
+
+type NotObject = string | number | Date | boolean | Array<any>;
+export type ShapeQuery<TItemSchema> = TItemSchema extends NotObject
+  ? {}
+  : { [k in keyof TItemSchema]?: TItemSchema[k] | ValueQuery<TItemSchema[k]> };
+
+export type NestedQuery<TItemSchema> = ValueQuery<TItemSchema> &
+  ShapeQuery<TItemSchema>;
+export type Query<TItemSchema> =
+  | TItemSchema
+  | RegExp
+  | NestedQuery<TItemSchema>;
+
+export type QueryOperators<TValue = any> = keyof ValueQuery<TValue>;
+
+/**
+ * Walks through each value given the context - used for nested operations. E.g:
+ * { "person.address": { $eq: "blarg" }}
+ */
+
+const walkKeyPathValues = (
+  item: any,
+  keyPath: Key[],
+  next: Tester,
+  depth: number,
+  key: Key,
+  owner: any
+) => {
+  const currentKey = keyPath[depth];
+
+  // if array, then try matching. Might fall through for cases like:
+  // { $eq: [1, 2, 3] }, [ 1, 2, 3 ].
+  if (isArray(item) && isNaN(Number(currentKey))) {
+    for (let i = 0, { length } = item; i < length; i++) {
+      // if FALSE is returned, then terminate walker. For operations, this simply
+      // means that the search critera was met.
+      if (!walkKeyPathValues(item[i], keyPath, next, depth, i, item)) {
+        return false;
+      }
+    }
+  }
+
+  if (depth === keyPath.length || item == null) {
+    return next(item, key, owner, depth === 0);
+  }
+
+  return walkKeyPathValues(
+    item[currentKey],
+    keyPath,
+    next,
+    depth + 1,
+    currentKey,
+    item
+  );
+};
+
+export abstract class BaseOperation<TParams, TItem = any>
+  implements Operation<TItem> {
+  keep: boolean;
+  done: boolean;
+  abstract propop: boolean;
+  constructor(
+    readonly params: TParams,
+    readonly owneryQuery: any,
+    readonly options: Options,
+    readonly name?: string
+  ) {
+    this.init();
+  }
+  protected init() {}
+  reset() {
+    this.done = false;
+    this.keep = false;
+  }
+  abstract next(item: any, key: Key, parent: any, root: boolean);
+}
+
+abstract class GroupOperation extends BaseOperation<any> {
+  keep: boolean;
+  done: boolean;
+
+  constructor(
+    params: any,
+    owneryQuery: any,
+    options: Options,
+    public readonly children: Operation<any>[]
+  ) {
+    super(params, owneryQuery, options);
+  }
+
+  /**
+   */
+
+  reset() {
+    this.keep = false;
+    this.done = false;
+    for (let i = 0, { length } = this.children; i < length; i++) {
+      this.children[i].reset();
+    }
+  }
+
+  abstract next(item: any, key: Key, owner: any, root: boolean);
+
+  /**
+   */
+
+  protected childrenNext(item: any, key: Key, owner: any, root: boolean) {
+    let done = true;
+    let keep = true;
+    for (let i = 0, { length } = this.children; i < length; i++) {
+      const childOperation = this.children[i];
+      if (!childOperation.done) {
+        childOperation.next(item, key, owner, root);
+      }
+      if (!childOperation.keep) {
+        keep = false;
+      }
+      if (childOperation.done) {
+        if (!childOperation.keep) {
+          break;
+        }
+      } else {
+        done = false;
+      }
+    }
+    this.done = done;
+    this.keep = keep;
+  }
+}
+
+export abstract class NamedGroupOperation extends GroupOperation
+  implements NamedOperation {
+  abstract propop: boolean;
+  constructor(
+    params: any,
+    owneryQuery: any,
+    options: Options,
+    children: Operation<any>[],
+    readonly name: string
+  ) {
+    super(params, owneryQuery, options, children);
+  }
+}
+
+export class QueryOperation<TItem> extends GroupOperation {
+  readonly propop = true;
+  /**
+   */
+
+  next(item: TItem, key: Key, parent: any, root: boolean) {
+    this.childrenNext(item, key, parent, root);
+  }
+}
+
+export class NestedOperation extends GroupOperation {
+  readonly propop = true;
+  constructor(
+    readonly keyPath: Key[],
+    params: any,
+    owneryQuery: any,
+    options: Options,
+    children: Operation<any>[]
+  ) {
+    super(params, owneryQuery, options, children);
+  }
+  /**
+   */
+
+  next(item: any, key: Key, parent: any) {
+    walkKeyPathValues(
+      item,
+      this.keyPath,
+      this._nextNestedValue,
+      0,
+      key,
+      parent
+    );
+  }
+
+  /**
+   */
+
+  private _nextNestedValue = (
+    value: any,
+    key: Key,
+    owner: any,
+    root: boolean
+  ) => {
+    this.childrenNext(value, key, owner, root);
+    return !this.done;
+  };
+}
+
+export const createTester = (a, compare: Comparator) => {
+  if (a instanceof Function) {
+    return a;
+  }
+  if (a instanceof RegExp) {
+    return b => {
+      const result = typeof b === "string" && a.test(b);
+      a.lastIndex = 0;
+      return result;
+    };
+  }
+  const comparableA = comparable(a);
+  return b => compare(comparableA, comparable(b));
+};
+
+export class EqualsOperation<TParam> extends BaseOperation<TParam> {
+  readonly propop = true;
+  private _test: Tester;
+  init() {
+    this._test = createTester(this.params, this.options.compare);
+  }
+  next(item, key: Key, parent: any) {
+    if (!Array.isArray(parent) || parent.hasOwnProperty(key)) {
+      if (this._test(item, key, parent)) {
+        this.done = true;
+        this.keep = true;
+      }
+    }
+  }
+}
+
+export const createEqualsOperation = (
+  params: any,
+  owneryQuery: any,
+  options: Options
+) => new EqualsOperation(params, owneryQuery, options);
+
+export class NopeOperation<TParam> extends BaseOperation<TParam> {
+  readonly propop = true;
+  next() {
+    this.done = true;
+    this.keep = false;
+  }
+}
+
+export const numericalOperationCreator = (
+  createNumericalOperation: OperationCreator<any>
+) => (params: any, owneryQuery: any, options: Options, name: string) => {
+  if (params == null) {
+    return new NopeOperation(params, owneryQuery, options, name);
+  }
+
+  return createNumericalOperation(params, owneryQuery, options, name);
+};
+
+export const numericalOperation = (createTester: (any) => Tester) =>
+  numericalOperationCreator(
+    (params: any, owneryQuery: Query<any>, options: Options, name: string) => {
+      const typeofParams = typeof comparable(params);
+      const test = createTester(params);
+      return new EqualsOperation(
+        b => {
+          return typeof comparable(b) === typeofParams && test(b);
+        },
+        owneryQuery,
+        options,
+        name
+      );
+    }
+  );
+
+export type Options = {
+  operations: {
+    [identifier: string]: OperationCreator<any>;
+  };
+  compare: (a, b) => boolean;
+};
+
+const createNamedOperation = (
+  name: string,
+  params: any,
+  parentQuery: any,
+  options: Options
+) => {
+  const operationCreator = options.operations[name];
+  if (!operationCreator) {
+    throwUnsupportedOperation(name);
+  }
+  return operationCreator(params, parentQuery, options, name);
+};
+
+const throwUnsupportedOperation = (name: string) => {
+  throw new Error(`Unsupported operation: ${name}`);
+};
+
+export const containsOperation = (query: any, options: Options) => {
+  for (const key in query) {
+    if (options.operations.hasOwnProperty(key) || key.charAt(0) === "$")
+      return true;
+  }
+  return false;
+};
+const createNestedOperation = (
+  keyPath: Key[],
+  nestedQuery: any,
+  parentKey: string,
+  owneryQuery: any,
+  options: Options
+) => {
+  if (containsOperation(nestedQuery, options)) {
+    const [selfOperations, nestedOperations] = createQueryOperations(
+      nestedQuery,
+      parentKey,
+      options
+    );
+    if (nestedOperations.length) {
+      throw new Error(
+        `Property queries must contain only operations, or exact objects.`
+      );
+    }
+    return new NestedOperation(
+      keyPath,
+      nestedQuery,
+      owneryQuery,
+      options,
+      selfOperations
+    );
+  }
+  return new NestedOperation(keyPath, nestedQuery, owneryQuery, options, [
+    new EqualsOperation(nestedQuery, owneryQuery, options)
+  ]);
+};
+
+export const createQueryOperation = <TItem, TSchema = TItem>(
+  query: Query<TSchema>,
+  owneryQuery: any = null,
+  { compare, operations }: Partial<Options> = {}
+): QueryOperation<TItem> => {
+  const options = {
+    compare: compare || equals,
+    operations: Object.assign({}, operations || {})
+  };
+
+  const [selfOperations, nestedOperations] = createQueryOperations(
+    query,
+    null,
+    options
+  );
+
+  const ops = [];
+
+  if (selfOperations.length) {
+    ops.push(
+      new NestedOperation([], query, owneryQuery, options, selfOperations)
+    );
+  }
+
+  ops.push(...nestedOperations);
+
+  if (ops.length === 1) {
+    return ops[0];
+  }
+  return new QueryOperation(query, owneryQuery, options, ops);
+};
+
+const createQueryOperations = (
+  query: any,
+  parentKey: string,
+  options: Options
+) => {
+  const selfOperations = [];
+  const nestedOperations = [];
+  if (!isVanillaObject(query)) {
+    selfOperations.push(new EqualsOperation(query, query, options));
+    return [selfOperations, nestedOperations];
+  }
+  for (const key in query) {
+    if (options.operations.hasOwnProperty(key)) {
+      const op = createNamedOperation(key, query[key], query, options);
+
+      if (op) {
+        if (!op.propop && parentKey && !options.operations[parentKey]) {
+          throw new Error(
+            `Malformed query. ${key} cannot be matched against property.`
+          );
+        }
+      }
+
+      // probably just a flag for another operation (like $options)
+      if (op != null) {
+        selfOperations.push(op);
+      }
+    } else if (key.charAt(0) === "$") {
+      throwUnsupportedOperation(key);
+    } else {
+      nestedOperations.push(
+        createNestedOperation(key.split("."), query[key], key, query, options)
+      );
+    }
+  }
+
+  return [selfOperations, nestedOperations];
+};
+
+export const createOperationTester = <TItem>(operation: Operation<TItem>) => (
+  item: TItem,
+  key?: Key,
+  owner?: any
+) => {
+  operation.reset();
+  operation.next(item, key, owner);
+  return operation.keep;
+};
+
+export const createQueryTester = <TItem, TSchema = TItem>(
+  query: Query<TSchema>,
+  options: Partial<Options> = {}
+) => {
+  return createOperationTester(
+    createQueryOperation<TItem, TSchema>(query, null, options)
+  );
+};

node_modules/sift/src/index.d.ts

@@ -0,0 +1,6 @@
+import { Query, QueryOperators, BasicValueQuery, ArrayValueQuery, ValueQuery, NestedQuery, ShapeQuery, Options, createQueryTester, EqualsOperation, createQueryOperation, createEqualsOperation, createOperationTester } from "./core";
+declare const createDefaultQueryOperation: <TItem, TSchema extends TItem = TItem>(query: Query<TSchema>, ownerQuery: any, { compare, operations }?: Partial<Options>) => import("./core").QueryOperation<unknown>;
+declare const createDefaultQueryTester: <TItem, TSchema extends TItem = TItem>(query: Query<TSchema>, options?: Partial<Options>) => (item: unknown, key?: import("./utils").Key, owner?: any) => boolean;
+export { Query, QueryOperators, BasicValueQuery, ArrayValueQuery, ValueQuery, NestedQuery, ShapeQuery, EqualsOperation, createQueryTester, createOperationTester, createDefaultQueryOperation, createEqualsOperation, createQueryOperation };
+export * from "./operations";
+export default createDefaultQueryTester;

node_modules/sift/src/index.js

@@ -0,0 +1,38 @@
+"use strict";
+var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    var desc = Object.getOwnPropertyDescriptor(m, k);
+    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
+      desc = { enumerable: true, get: function() { return m[k]; } };
+    }
+    Object.defineProperty(o, k2, desc);
+}) : (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    o[k2] = m[k];
+}));
+var __exportStar = (this && this.__exportStar) || function(m, exports) {
+    for (var p in m) if (p !== "default" && !Object.prototype.hasOwnProperty.call(exports, p)) __createBinding(exports, m, p);
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.createQueryOperation = exports.createEqualsOperation = exports.createDefaultQueryOperation = exports.createOperationTester = exports.createQueryTester = exports.EqualsOperation = void 0;
+const defaultOperations = require("./operations");
+const core_1 = require("./core");
+Object.defineProperty(exports, "createQueryTester", { enumerable: true, get: function () { return core_1.createQueryTester; } });
+Object.defineProperty(exports, "EqualsOperation", { enumerable: true, get: function () { return core_1.EqualsOperation; } });
+Object.defineProperty(exports, "createQueryOperation", { enumerable: true, get: function () { return core_1.createQueryOperation; } });
+Object.defineProperty(exports, "createEqualsOperation", { enumerable: true, get: function () { return core_1.createEqualsOperation; } });
+Object.defineProperty(exports, "createOperationTester", { enumerable: true, get: function () { return core_1.createOperationTester; } });
+const createDefaultQueryOperation = (query, ownerQuery, { compare, operations } = {}) => {
+    return (0, core_1.createQueryOperation)(query, ownerQuery, {
+        compare,
+        operations: Object.assign({}, defaultOperations, operations || {})
+    });
+};
+exports.createDefaultQueryOperation = createDefaultQueryOperation;
+const createDefaultQueryTester = (query, options = {}) => {
+    const op = createDefaultQueryOperation(query, null, options);
+    return (0, core_1.createOperationTester)(op);
+};
+__exportStar(require("./operations"), exports);
+exports.default = createDefaultQueryTester;
+//# sourceMappingURL=index.js.map

node_modules/sift/src/index.js.map

@@ -0,0 +1 @@
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node_modules/sift/src/index.ts

@@ -0,0 +1,54 @@
+import * as defaultOperations from "./operations";
+import {
+  Query,
+  QueryOperators,
+  BasicValueQuery,
+  ArrayValueQuery,
+  ValueQuery,
+  NestedQuery,
+  ShapeQuery,
+  Options,
+  createQueryTester,
+  EqualsOperation,
+  createQueryOperation,
+  createEqualsOperation,
+  createOperationTester
+} from "./core";
+
+const createDefaultQueryOperation = <TItem, TSchema extends TItem = TItem>(
+  query: Query<TSchema>,
+  ownerQuery: any,
+  { compare, operations }: Partial<Options> = {}
+) => {
+  return createQueryOperation(query, ownerQuery, {
+    compare,
+    operations: Object.assign({}, defaultOperations, operations || {})
+  });
+};
+
+const createDefaultQueryTester = <TItem, TSchema extends TItem = TItem>(
+  query: Query<TSchema>,
+  options: Partial<Options> = {}
+) => {
+  const op = createDefaultQueryOperation(query, null, options);
+  return createOperationTester(op);
+};
+
+export {
+  Query,
+  QueryOperators,
+  BasicValueQuery,
+  ArrayValueQuery,
+  ValueQuery,
+  NestedQuery,
+  ShapeQuery,
+  EqualsOperation,
+  createQueryTester,
+  createOperationTester,
+  createDefaultQueryOperation,
+  createEqualsOperation,
+  createQueryOperation
+};
+export * from "./operations";
+
+export default createDefaultQueryTester;

node_modules/sift/src/operations.d.ts

@@ -0,0 +1,88 @@
+import { BaseOperation, EqualsOperation, Options, Operation, Query, NamedGroupOperation } from "./core";
+import { Key } from "./utils";
+declare class $Ne extends BaseOperation<any> {
+    readonly propop = true;
+    private _test;
+    init(): void;
+    reset(): void;
+    next(item: any): void;
+}
+declare class $ElemMatch extends BaseOperation<Query<any>> {
+    readonly propop = true;
+    private _queryOperation;
+    init(): void;
+    reset(): void;
+    next(item: any): void;
+}
+declare class $Not extends BaseOperation<Query<any>> {
+    readonly propop = true;
+    private _queryOperation;
+    init(): void;
+    reset(): void;
+    next(item: any, key: Key, owner: any, root: boolean): void;
+}
+export declare class $Size extends BaseOperation<any> {
+    readonly propop = true;
+    init(): void;
+    next(item: any): void;
+}
+declare class $Or extends BaseOperation<any> {
+    readonly propop = false;
+    private _ops;
+    init(): void;
+    reset(): void;
+    next(item: any, key: Key, owner: any): void;
+}
+declare class $Nor extends $Or {
+    readonly propop = false;
+    next(item: any, key: Key, owner: any): void;
+}
+declare class $In extends BaseOperation<any> {
+    readonly propop = true;
+    private _testers;
+    init(): void;
+    next(item: any, key: Key, owner: any): void;
+}
+declare class $Nin extends BaseOperation<any> {
+    readonly propop = true;
+    private _in;
+    constructor(params: any, ownerQuery: any, options: Options, name: string);
+    next(item: any, key: Key, owner: any, root: boolean): void;
+    reset(): void;
+}
+declare class $Exists extends BaseOperation<boolean> {
+    readonly propop = true;
+    next(item: any, key: Key, owner: any): void;
+}
+declare class $And extends NamedGroupOperation {
+    readonly propop = false;
+    constructor(params: Query<any>[], owneryQuery: Query<any>, options: Options, name: string);
+    next(item: any, key: Key, owner: any, root: boolean): void;
+}
+declare class $All extends NamedGroupOperation {
+    readonly propop = true;
+    constructor(params: Query<any>[], owneryQuery: Query<any>, options: Options, name: string);
+    next(item: any, key: Key, owner: any, root: boolean): void;
+}
+export declare const $eq: (params: any, owneryQuery: Query<any>, options: Options) => EqualsOperation<any>;
+export declare const $ne: (params: any, owneryQuery: Query<any>, options: Options, name: string) => $Ne;
+export declare const $or: (params: Query<any>[], owneryQuery: Query<any>, options: Options, name: string) => $Or;
+export declare const $nor: (params: Query<any>[], owneryQuery: Query<any>, options: Options, name: string) => $Nor;
+export declare const $elemMatch: (params: any, owneryQuery: Query<any>, options: Options, name: string) => $ElemMatch;
+export declare const $nin: (params: any, owneryQuery: Query<any>, options: Options, name: string) => $Nin;
+export declare const $in: (params: any, owneryQuery: Query<any>, options: Options, name: string) => $In;
+export declare const $lt: (params: any, owneryQuery: any, options: Options, name: string) => Operation<any> | import("./core").NopeOperation<any>;
+export declare const $lte: (params: any, owneryQuery: any, options: Options, name: string) => Operation<any> | import("./core").NopeOperation<any>;
+export declare const $gt: (params: any, owneryQuery: any, options: Options, name: string) => Operation<any> | import("./core").NopeOperation<any>;
+export declare const $gte: (params: any, owneryQuery: any, options: Options, name: string) => Operation<any> | import("./core").NopeOperation<any>;
+export declare const $mod: ([mod, equalsValue]: number[], owneryQuery: Query<any>, options: Options) => EqualsOperation<(b: any) => boolean>;
+export declare const $exists: (params: boolean, owneryQuery: Query<any>, options: Options, name: string) => $Exists;
+export declare const $regex: (pattern: string, owneryQuery: Query<any>, options: Options) => EqualsOperation<RegExp>;
+export declare const $not: (params: any, owneryQuery: Query<any>, options: Options, name: string) => $Not;
+export declare const $type: (clazz: Function | string, owneryQuery: Query<any>, options: Options) => EqualsOperation<(b: any) => any>;
+export declare const $and: (params: Query<any>[], ownerQuery: Query<any>, options: Options, name: string) => $And;
+export declare const $all: (params: Query<any>[], ownerQuery: Query<any>, options: Options, name: string) => $All;
+export declare const $size: (params: number, ownerQuery: Query<any>, options: Options) => $Size;
+export declare const $options: () => any;
+export declare const $where: (params: string | Function, ownerQuery: Query<any>, options: Options) => EqualsOperation<(b: any) => any>;
+export {};

node_modules/sift/src/operations.js

@@ -0,0 +1,297 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.$where = exports.$options = exports.$size = exports.$all = exports.$and = exports.$type = exports.$not = exports.$regex = exports.$exists = exports.$mod = exports.$gte = exports.$gt = exports.$lte = exports.$lt = exports.$in = exports.$nin = exports.$elemMatch = exports.$nor = exports.$or = exports.$ne = exports.$eq = exports.$Size = void 0;
+const core_1 = require("./core");
+const utils_1 = require("./utils");
+class $Ne extends core_1.BaseOperation {
+    constructor() {
+        super(...arguments);
+        this.propop = true;
+    }
+    init() {
+        this._test = (0, core_1.createTester)(this.params, this.options.compare);
+    }
+    reset() {
+        super.reset();
+        this.keep = true;
+    }
+    next(item) {
+        if (this._test(item)) {
+            this.done = true;
+            this.keep = false;
+        }
+    }
+}
+// https://docs.mongodb.com/manual/reference/operator/query/elemMatch/
+class $ElemMatch extends core_1.BaseOperation {
+    constructor() {
+        super(...arguments);
+        this.propop = true;
+    }
+    init() {
+        if (!this.params || typeof this.params !== "object") {
+            throw new Error(`Malformed query. $elemMatch must by an object.`);
+        }
+        this._queryOperation = (0, core_1.createQueryOperation)(this.params, this.owneryQuery, this.options);
+    }
+    reset() {
+        super.reset();
+        this._queryOperation.reset();
+    }
+    next(item) {
+        if ((0, utils_1.isArray)(item)) {
+            for (let i = 0, { length } = item; i < length; i++) {
+                // reset query operation since item being tested needs to pass _all_ query
+                // operations for it to be a success
+                this._queryOperation.reset();
+                const child = item[i];
+                this._queryOperation.next(child, i, item, false);
+                this.keep = this.keep || this._queryOperation.keep;
+            }
+            this.done = true;
+        }
+        else {
+            this.done = false;
+            this.keep = false;
+        }
+    }
+}
+class $Not extends core_1.BaseOperation {
+    constructor() {
+        super(...arguments);
+        this.propop = true;
+    }
+    init() {
+        this._queryOperation = (0, core_1.createQueryOperation)(this.params, this.owneryQuery, this.options);
+    }
+    reset() {
+        super.reset();
+        this._queryOperation.reset();
+    }
+    next(item, key, owner, root) {
+        this._queryOperation.next(item, key, owner, root);
+        this.done = this._queryOperation.done;
+        this.keep = !this._queryOperation.keep;
+    }
+}
+class $Size extends core_1.BaseOperation {
+    constructor() {
+        super(...arguments);
+        this.propop = true;
+    }
+    init() { }
+    next(item) {
+        if ((0, utils_1.isArray)(item) && item.length === this.params) {
+            this.done = true;
+            this.keep = true;
+        }
+        // if (parent && parent.length === this.params) {
+        //   this.done = true;
+        //   this.keep = true;
+        // }
+    }
+}
+exports.$Size = $Size;
+const assertGroupNotEmpty = (values) => {
+    if (values.length === 0) {
+        throw new Error(`$and/$or/$nor must be a nonempty array`);
+    }
+};
+class $Or extends core_1.BaseOperation {
+    constructor() {
+        super(...arguments);
+        this.propop = false;
+    }
+    init() {
+        assertGroupNotEmpty(this.params);
+        this._ops = this.params.map(op => (0, core_1.createQueryOperation)(op, null, this.options));
+    }
+    reset() {
+        this.done = false;
+        this.keep = false;
+        for (let i = 0, { length } = this._ops; i < length; i++) {
+            this._ops[i].reset();
+        }
+    }
+    next(item, key, owner) {
+        let done = false;
+        let success = false;
+        for (let i = 0, { length } = this._ops; i < length; i++) {
+            const op = this._ops[i];
+            op.next(item, key, owner);
+            if (op.keep) {
+                done = true;
+                success = op.keep;
+                break;
+            }
+        }
+        this.keep = success;
+        this.done = done;
+    }
+}
+class $Nor extends $Or {
+    constructor() {
+        super(...arguments);
+        this.propop = false;
+    }
+    next(item, key, owner) {
+        super.next(item, key, owner);
+        this.keep = !this.keep;
+    }
+}
+class $In extends core_1.BaseOperation {
+    constructor() {
+        super(...arguments);
+        this.propop = true;
+    }
+    init() {
+        this._testers = this.params.map(value => {
+            if ((0, core_1.containsOperation)(value, this.options)) {
+                throw new Error(`cannot nest $ under ${this.name.toLowerCase()}`);
+            }
+            return (0, core_1.createTester)(value, this.options.compare);
+        });
+    }
+    next(item, key, owner) {
+        let done = false;
+        let success = false;
+        for (let i = 0, { length } = this._testers; i < length; i++) {
+            const test = this._testers[i];
+            if (test(item)) {
+                done = true;
+                success = true;
+                break;
+            }
+        }
+        this.keep = success;
+        this.done = done;
+    }
+}
+class $Nin extends core_1.BaseOperation {
+    constructor(params, ownerQuery, options, name) {
+        super(params, ownerQuery, options, name);
+        this.propop = true;
+        this._in = new $In(params, ownerQuery, options, name);
+    }
+    next(item, key, owner, root) {
+        this._in.next(item, key, owner);
+        if ((0, utils_1.isArray)(owner) && !root) {
+            if (this._in.keep) {
+                this.keep = false;
+                this.done = true;
+            }
+            else if (key == owner.length - 1) {
+                this.keep = true;
+                this.done = true;
+            }
+        }
+        else {
+            this.keep = !this._in.keep;
+            this.done = true;
+        }
+    }
+    reset() {
+        super.reset();
+        this._in.reset();
+    }
+}
+class $Exists extends core_1.BaseOperation {
+    constructor() {
+        super(...arguments);
+        this.propop = true;
+    }
+    next(item, key, owner) {
+        if (owner.hasOwnProperty(key) === this.params) {
+            this.done = true;
+            this.keep = true;
+        }
+    }
+}
+class $And extends core_1.NamedGroupOperation {
+    constructor(params, owneryQuery, options, name) {
+        super(params, owneryQuery, options, params.map(query => (0, core_1.createQueryOperation)(query, owneryQuery, options)), name);
+        this.propop = false;
+        assertGroupNotEmpty(params);
+    }
+    next(item, key, owner, root) {
+        this.childrenNext(item, key, owner, root);
+    }
+}
+class $All extends core_1.NamedGroupOperation {
+    constructor(params, owneryQuery, options, name) {
+        super(params, owneryQuery, options, params.map(query => (0, core_1.createQueryOperation)(query, owneryQuery, options)), name);
+        this.propop = true;
+    }
+    next(item, key, owner, root) {
+        this.childrenNext(item, key, owner, root);
+    }
+}
+const $eq = (params, owneryQuery, options) => new core_1.EqualsOperation(params, owneryQuery, options);
+exports.$eq = $eq;
+const $ne = (params, owneryQuery, options, name) => new $Ne(params, owneryQuery, options, name);
+exports.$ne = $ne;
+const $or = (params, owneryQuery, options, name) => new $Or(params, owneryQuery, options, name);
+exports.$or = $or;
+const $nor = (params, owneryQuery, options, name) => new $Nor(params, owneryQuery, options, name);
+exports.$nor = $nor;
+const $elemMatch = (params, owneryQuery, options, name) => new $ElemMatch(params, owneryQuery, options, name);
+exports.$elemMatch = $elemMatch;
+const $nin = (params, owneryQuery, options, name) => new $Nin(params, owneryQuery, options, name);
+exports.$nin = $nin;
+const $in = (params, owneryQuery, options, name) => {
+    return new $In(params, owneryQuery, options, name);
+};
+exports.$in = $in;
+exports.$lt = (0, core_1.numericalOperation)(params => b => b < params);
+exports.$lte = (0, core_1.numericalOperation)(params => b => b <= params);
+exports.$gt = (0, core_1.numericalOperation)(params => b => b > params);
+exports.$gte = (0, core_1.numericalOperation)(params => b => b >= params);
+const $mod = ([mod, equalsValue], owneryQuery, options) => new core_1.EqualsOperation(b => (0, utils_1.comparable)(b) % mod === equalsValue, owneryQuery, options);
+exports.$mod = $mod;
+const $exists = (params, owneryQuery, options, name) => new $Exists(params, owneryQuery, options, name);
+exports.$exists = $exists;
+const $regex = (pattern, owneryQuery, options) => new core_1.EqualsOperation(new RegExp(pattern, owneryQuery.$options), owneryQuery, options);
+exports.$regex = $regex;
+const $not = (params, owneryQuery, options, name) => new $Not(params, owneryQuery, options, name);
+exports.$not = $not;
+const typeAliases = {
+    number: v => typeof v === "number",
+    string: v => typeof v === "string",
+    bool: v => typeof v === "boolean",
+    array: v => Array.isArray(v),
+    null: v => v === null,
+    timestamp: v => v instanceof Date
+};
+const $type = (clazz, owneryQuery, options) => new core_1.EqualsOperation(b => {
+    if (typeof clazz === "string") {
+        if (!typeAliases[clazz]) {
+            throw new Error(`Type alias does not exist`);
+        }
+        return typeAliases[clazz](b);
+    }
+    return b != null ? b instanceof clazz || b.constructor === clazz : false;
+}, owneryQuery, options);
+exports.$type = $type;
+const $and = (params, ownerQuery, options, name) => new $And(params, ownerQuery, options, name);
+exports.$and = $and;
+const $all = (params, ownerQuery, options, name) => new $All(params, ownerQuery, options, name);
+exports.$all = $all;
+const $size = (params, ownerQuery, options) => new $Size(params, ownerQuery, options, "$size");
+exports.$size = $size;
+const $options = () => null;
+exports.$options = $options;
+const $where = (params, ownerQuery, options) => {
+    let test;
+    if ((0, utils_1.isFunction)(params)) {
+        test = params;
+    }
+    else if (!process.env.CSP_ENABLED) {
+        test = new Function("obj", "return " + params);
+    }
+    else {
+        throw new Error(`In CSP mode, sift does not support strings in "$where" condition`);
+    }
+    return new core_1.EqualsOperation(b => test.bind(b)(b), ownerQuery, options);
+};
+exports.$where = $where;
+//# sourceMappingURL=operations.js.map

node_modules/sift/src/operations.ts

@@ -0,0 +1,411 @@
+import {
+  BaseOperation,
+  EqualsOperation,
+  Options,
+  createTester,
+  Tester,
+  createQueryOperation,
+  QueryOperation,
+  Operation,
+  Query,
+  NamedGroupOperation,
+  numericalOperation,
+  containsOperation,
+  NamedOperation
+} from "./core";
+import { Key, comparable, isFunction, isArray } from "./utils";
+
+class $Ne extends BaseOperation<any> {
+  readonly propop = true;
+  private _test: Tester;
+  init() {
+    this._test = createTester(this.params, this.options.compare);
+  }
+  reset() {
+    super.reset();
+    this.keep = true;
+  }
+  next(item: any) {
+    if (this._test(item)) {
+      this.done = true;
+      this.keep = false;
+    }
+  }
+}
+// https://docs.mongodb.com/manual/reference/operator/query/elemMatch/
+class $ElemMatch extends BaseOperation<Query<any>> {
+  readonly propop = true;
+  private _queryOperation: QueryOperation<any>;
+  init() {
+    if (!this.params || typeof this.params !== "object") {
+      throw new Error(`Malformed query. $elemMatch must by an object.`);
+    }
+    this._queryOperation = createQueryOperation(
+      this.params,
+      this.owneryQuery,
+      this.options
+    );
+  }
+  reset() {
+    super.reset();
+    this._queryOperation.reset();
+  }
+  next(item: any) {
+    if (isArray(item)) {
+      for (let i = 0, { length } = item; i < length; i++) {
+        // reset query operation since item being tested needs to pass _all_ query
+        // operations for it to be a success
+        this._queryOperation.reset();
+
+        const child = item[i];
+        this._queryOperation.next(child, i, item, false);
+        this.keep = this.keep || this._queryOperation.keep;
+      }
+      this.done = true;
+    } else {
+      this.done = false;
+      this.keep = false;
+    }
+  }
+}
+
+class $Not extends BaseOperation<Query<any>> {
+  readonly propop = true;
+  private _queryOperation: QueryOperation<any>;
+  init() {
+    this._queryOperation = createQueryOperation(
+      this.params,
+      this.owneryQuery,
+      this.options
+    );
+  }
+  reset() {
+    super.reset();
+    this._queryOperation.reset();
+  }
+  next(item: any, key: Key, owner: any, root: boolean) {
+    this._queryOperation.next(item, key, owner, root);
+    this.done = this._queryOperation.done;
+    this.keep = !this._queryOperation.keep;
+  }
+}
+
+export class $Size extends BaseOperation<any> {
+  readonly propop = true;
+  init() {}
+  next(item) {
+    if (isArray(item) && item.length === this.params) {
+      this.done = true;
+      this.keep = true;
+    }
+    // if (parent && parent.length === this.params) {
+    //   this.done = true;
+    //   this.keep = true;
+    // }
+  }
+}
+
+const assertGroupNotEmpty = (values: any[]) => {
+  if (values.length === 0) {
+    throw new Error(`$and/$or/$nor must be a nonempty array`);
+  }
+};
+
+class $Or extends BaseOperation<any> {
+  readonly propop = false;
+  private _ops: Operation<any>[];
+  init() {
+    assertGroupNotEmpty(this.params);
+    this._ops = this.params.map(op =>
+      createQueryOperation(op, null, this.options)
+    );
+  }
+  reset() {
+    this.done = false;
+    this.keep = false;
+    for (let i = 0, { length } = this._ops; i < length; i++) {
+      this._ops[i].reset();
+    }
+  }
+  next(item: any, key: Key, owner: any) {
+    let done = false;
+    let success = false;
+    for (let i = 0, { length } = this._ops; i < length; i++) {
+      const op = this._ops[i];
+      op.next(item, key, owner);
+      if (op.keep) {
+        done = true;
+        success = op.keep;
+        break;
+      }
+    }
+
+    this.keep = success;
+    this.done = done;
+  }
+}
+
+class $Nor extends $Or {
+  readonly propop = false;
+  next(item: any, key: Key, owner: any) {
+    super.next(item, key, owner);
+    this.keep = !this.keep;
+  }
+}
+
+class $In extends BaseOperation<any> {
+  readonly propop = true;
+  private _testers: Tester[];
+  init() {
+    this._testers = this.params.map(value => {
+      if (containsOperation(value, this.options)) {
+        throw new Error(`cannot nest $ under ${this.name.toLowerCase()}`);
+      }
+      return createTester(value, this.options.compare);
+    });
+  }
+  next(item: any, key: Key, owner: any) {
+    let done = false;
+    let success = false;
+    for (let i = 0, { length } = this._testers; i < length; i++) {
+      const test = this._testers[i];
+      if (test(item)) {
+        done = true;
+        success = true;
+        break;
+      }
+    }
+
+    this.keep = success;
+    this.done = done;
+  }
+}
+
+class $Nin extends BaseOperation<any> {
+  readonly propop = true;
+  private _in: $In;
+  constructor(params: any, ownerQuery: any, options: Options, name: string) {
+    super(params, ownerQuery, options, name);
+    this._in = new $In(params, ownerQuery, options, name);
+  }
+  next(item: any, key: Key, owner: any, root: boolean) {
+    this._in.next(item, key, owner);
+
+    if (isArray(owner) && !root) {
+      if (this._in.keep) {
+        this.keep = false;
+        this.done = true;
+      } else if (key == owner.length - 1) {
+        this.keep = true;
+        this.done = true;
+      }
+    } else {
+      this.keep = !this._in.keep;
+      this.done = true;
+    }
+  }
+  reset() {
+    super.reset();
+    this._in.reset();
+  }
+}
+
+class $Exists extends BaseOperation<boolean> {
+  readonly propop = true;
+  next(item: any, key: Key, owner: any) {
+    if (owner.hasOwnProperty(key) === this.params) {
+      this.done = true;
+      this.keep = true;
+    }
+  }
+}
+
+class $And extends NamedGroupOperation {
+  readonly propop = false;
+  constructor(
+    params: Query<any>[],
+    owneryQuery: Query<any>,
+    options: Options,
+    name: string
+  ) {
+    super(
+      params,
+      owneryQuery,
+      options,
+      params.map(query => createQueryOperation(query, owneryQuery, options)),
+      name
+    );
+
+    assertGroupNotEmpty(params);
+  }
+  next(item: any, key: Key, owner: any, root: boolean) {
+    this.childrenNext(item, key, owner, root);
+  }
+}
+
+class $All extends NamedGroupOperation {
+  readonly propop = true;
+  constructor(
+    params: Query<any>[],
+    owneryQuery: Query<any>,
+    options: Options,
+    name: string
+  ) {
+    super(
+      params,
+      owneryQuery,
+      options,
+      params.map(query => createQueryOperation(query, owneryQuery, options)),
+      name
+    );
+  }
+  next(item: any, key: Key, owner: any, root: boolean) {
+    this.childrenNext(item, key, owner, root);
+  }
+}
+
+export const $eq = (params: any, owneryQuery: Query<any>, options: Options) =>
+  new EqualsOperation(params, owneryQuery, options);
+export const $ne = (
+  params: any,
+  owneryQuery: Query<any>,
+  options: Options,
+  name: string
+) => new $Ne(params, owneryQuery, options, name);
+export const $or = (
+  params: Query<any>[],
+  owneryQuery: Query<any>,
+  options: Options,
+  name: string
+) => new $Or(params, owneryQuery, options, name);
+export const $nor = (
+  params: Query<any>[],
+  owneryQuery: Query<any>,
+  options: Options,
+  name: string
+) => new $Nor(params, owneryQuery, options, name);
+export const $elemMatch = (
+  params: any,
+  owneryQuery: Query<any>,
+  options: Options,
+  name: string
+) => new $ElemMatch(params, owneryQuery, options, name);
+export const $nin = (
+  params: any,
+  owneryQuery: Query<any>,
+  options: Options,
+  name: string
+) => new $Nin(params, owneryQuery, options, name);
+export const $in = (
+  params: any,
+  owneryQuery: Query<any>,
+  options: Options,
+  name: string
+) => {
+  return new $In(params, owneryQuery, options, name);
+};
+
+export const $lt = numericalOperation(params => b => b < params);
+export const $lte = numericalOperation(params => b => b <= params);
+export const $gt = numericalOperation(params => b => b > params);
+export const $gte = numericalOperation(params => b => b >= params);
+export const $mod = (
+  [mod, equalsValue]: number[],
+  owneryQuery: Query<any>,
+  options: Options
+) =>
+  new EqualsOperation(
+    b => comparable(b) % mod === equalsValue,
+    owneryQuery,
+    options
+  );
+export const $exists = (
+  params: boolean,
+  owneryQuery: Query<any>,
+  options: Options,
+  name: string
+) => new $Exists(params, owneryQuery, options, name);
+export const $regex = (
+  pattern: string,
+  owneryQuery: Query<any>,
+  options: Options
+) =>
+  new EqualsOperation(
+    new RegExp(pattern, owneryQuery.$options),
+    owneryQuery,
+    options
+  );
+export const $not = (
+  params: any,
+  owneryQuery: Query<any>,
+  options: Options,
+  name: string
+) => new $Not(params, owneryQuery, options, name);
+
+const typeAliases = {
+  number: v => typeof v === "number",
+  string: v => typeof v === "string",
+  bool: v => typeof v === "boolean",
+  array: v => Array.isArray(v),
+  null: v => v === null,
+  timestamp: v => v instanceof Date
+};
+
+export const $type = (
+  clazz: Function | string,
+  owneryQuery: Query<any>,
+  options: Options
+) =>
+  new EqualsOperation(
+    b => {
+      if (typeof clazz === "string") {
+        if (!typeAliases[clazz]) {
+          throw new Error(`Type alias does not exist`);
+        }
+
+        return typeAliases[clazz](b);
+      }
+
+      return b != null ? b instanceof clazz || b.constructor === clazz : false;
+    },
+    owneryQuery,
+    options
+  );
+export const $and = (
+  params: Query<any>[],
+  ownerQuery: Query<any>,
+  options: Options,
+  name: string
+) => new $And(params, ownerQuery, options, name);
+
+export const $all = (
+  params: Query<any>[],
+  ownerQuery: Query<any>,
+  options: Options,
+  name: string
+) => new $All(params, ownerQuery, options, name);
+export const $size = (
+  params: number,
+  ownerQuery: Query<any>,
+  options: Options
+) => new $Size(params, ownerQuery, options, "$size");
+export const $options = () => null;
+export const $where = (
+  params: string | Function,
+  ownerQuery: Query<any>,
+  options: Options
+) => {
+  let test;
+
+  if (isFunction(params)) {
+    test = params;
+  } else if (!process.env.CSP_ENABLED) {
+    test = new Function("obj", "return " + params);
+  } else {
+    throw new Error(
+      `In CSP mode, sift does not support strings in "$where" condition`
+    );
+  }
+
+  return new EqualsOperation(b => test.bind(b)(b), ownerQuery, options);
+};

node_modules/sift/src/utils.d.ts

@@ -0,0 +1,9 @@
+export declare type Key = string | number;
+export declare type Comparator = (a: any, b: any) => boolean;
+export declare const typeChecker: <TType>(type: any) => (value: any) => value is TType;
+export declare const comparable: (value: any) => any;
+export declare const isArray: (value: any) => value is any[];
+export declare const isObject: (value: any) => value is Object;
+export declare const isFunction: (value: any) => value is Function;
+export declare const isVanillaObject: (value: any) => boolean;
+export declare const equals: (a: any, b: any) => boolean;

node_modules/sift/src/utils.js

@@ -0,0 +1,70 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.equals = exports.isVanillaObject = exports.isFunction = exports.isObject = exports.isArray = exports.comparable = exports.typeChecker = void 0;
+const typeChecker = (type) => {
+    const typeString = "[object " + type + "]";
+    return function (value) {
+        return getClassName(value) === typeString;
+    };
+};
+exports.typeChecker = typeChecker;
+const getClassName = value => Object.prototype.toString.call(value);
+const comparable = (value) => {
+    if (value instanceof Date) {
+        return value.getTime();
+    }
+    else if ((0, exports.isArray)(value)) {
+        return value.map(exports.comparable);
+    }
+    else if (value && typeof value.toJSON === "function") {
+        return value.toJSON();
+    }
+    return value;
+};
+exports.comparable = comparable;
+exports.isArray = (0, exports.typeChecker)("Array");
+exports.isObject = (0, exports.typeChecker)("Object");
+exports.isFunction = (0, exports.typeChecker)("Function");
+const isVanillaObject = value => {
+    return (value &&
+        (value.constructor === Object ||
+            value.constructor === Array ||
+            value.constructor.toString() === "function Object() { [native code] }" ||
+            value.constructor.toString() === "function Array() { [native code] }") &&
+        !value.toJSON);
+};
+exports.isVanillaObject = isVanillaObject;
+const equals = (a, b) => {
+    if (a == null && a == b) {
+        return true;
+    }
+    if (a === b) {
+        return true;
+    }
+    if (Object.prototype.toString.call(a) !== Object.prototype.toString.call(b)) {
+        return false;
+    }
+    if ((0, exports.isArray)(a)) {
+        if (a.length !== b.length) {
+            return false;
+        }
+        for (let i = 0, { length } = a; i < length; i++) {
+            if (!(0, exports.equals)(a[i], b[i]))
+                return false;
+        }
+        return true;
+    }
+    else if ((0, exports.isObject)(a)) {
+        if (Object.keys(a).length !== Object.keys(b).length) {
+            return false;
+        }
+        for (const key in a) {
+            if (!(0, exports.equals)(a[key], b[key]))
+                return false;
+        }
+        return true;
+    }
+    return false;
+};
+exports.equals = equals;
+//# sourceMappingURL=utils.js.map

node_modules/sift/src/utils.js.map

@@ -0,0 +1 @@
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node_modules/sift/src/utils.ts

@@ -0,0 +1,68 @@
+export type Key = string | number;
+export type Comparator = (a, b) => boolean;
+export const typeChecker = <TType>(type) => {
+  const typeString = "[object " + type + "]";
+  return function(value): value is TType {
+    return getClassName(value) === typeString;
+  };
+};
+
+const getClassName = value => Object.prototype.toString.call(value);
+
+export const comparable = (value: any) => {
+  if (value instanceof Date) {
+    return value.getTime();
+  } else if (isArray(value)) {
+    return value.map(comparable);
+  } else if (value && typeof value.toJSON === "function") {
+    return value.toJSON();
+  }
+
+  return value;
+};
+
+export const isArray = typeChecker<Array<any>>("Array");
+export const isObject = typeChecker<Object>("Object");
+export const isFunction = typeChecker<Function>("Function");
+export const isVanillaObject = value => {
+  return (
+    value &&
+    (value.constructor === Object ||
+      value.constructor === Array ||
+      value.constructor.toString() === "function Object() { [native code] }" ||
+      value.constructor.toString() === "function Array() { [native code] }") &&
+    !value.toJSON
+  );
+};
+
+export const equals = (a, b) => {
+  if (a == null && a == b) {
+    return true;
+  }
+  if (a === b) {
+    return true;
+  }
+
+  if (Object.prototype.toString.call(a) !== Object.prototype.toString.call(b)) {
+    return false;
+  }
+
+  if (isArray(a)) {
+    if (a.length !== b.length) {
+      return false;
+    }
+    for (let i = 0, { length } = a; i < length; i++) {
+      if (!equals(a[i], b[i])) return false;
+    }
+    return true;
+  } else if (isObject(a)) {
+    if (Object.keys(a).length !== Object.keys(b).length) {
+      return false;
+    }
+    for (const key in a) {
+      if (!equals(a[key], b[key])) return false;
+    }
+    return true;
+  }
+  return false;
+};