Initial commit (by create-cloudflare CLI)

cool-dawn-3d3b/node_modules/better-sqlite3/lib/methods/aggregate.js

@@ -0,0 +1,43 @@
+'use strict';
+const { getBooleanOption, cppdb } = require('../util');
+
+module.exports = function defineAggregate(name, options) {
+	// Validate arguments
+	if (typeof name !== 'string') throw new TypeError('Expected first argument to be a string');
+	if (typeof options !== 'object' || options === null) throw new TypeError('Expected second argument to be an options object');
+	if (!name) throw new TypeError('User-defined function name cannot be an empty string');
+
+	// Interpret options
+	const start = 'start' in options ? options.start : null;
+	const step = getFunctionOption(options, 'step', true);
+	const inverse = getFunctionOption(options, 'inverse', false);
+	const result = getFunctionOption(options, 'result', false);
+	const safeIntegers = 'safeIntegers' in options ? +getBooleanOption(options, 'safeIntegers') : 2;
+	const deterministic = getBooleanOption(options, 'deterministic');
+	const directOnly = getBooleanOption(options, 'directOnly');
+	const varargs = getBooleanOption(options, 'varargs');
+	let argCount = -1;
+
+	// Determine argument count
+	if (!varargs) {
+		argCount = Math.max(getLength(step), inverse ? getLength(inverse) : 0);
+		if (argCount > 0) argCount -= 1;
+		if (argCount > 100) throw new RangeError('User-defined functions cannot have more than 100 arguments');
+	}
+
+	this[cppdb].aggregate(start, step, inverse, result, name, argCount, safeIntegers, deterministic, directOnly);
+	return this;
+};
+
+const getFunctionOption = (options, key, required) => {
+	const value = key in options ? options[key] : null;
+	if (typeof value === 'function') return value;
+	if (value != null) throw new TypeError(`Expected the "${key}" option to be a function`);
+	if (required) throw new TypeError(`Missing required option "${key}"`);
+	return null;
+};
+
+const getLength = ({ length }) => {
+	if (Number.isInteger(length) && length >= 0) return length;
+	throw new TypeError('Expected function.length to be a positive integer');
+};