Initial commit (by create-cloudflare CLI)

node_modules/wrangler/templates/pages-dev-util.ts

@@ -0,0 +1,55 @@
+/**
+ * @param pathname A pathname string, such as `/foo` or `/foo/bar`
+ * @param routingRule The routing rule, such as `/foo/*`
+ * @returns True if pathname matches the routing rule
+ *
+ * /       ->  /
+ * /*      ->  /*
+ * /foo    ->  /foo
+ * /foo*   ->  /foo, /foo-bar, /foo/*
+ * /foo/*  ->  /foo, /foo/bar
+ */
+export function isRoutingRuleMatch(
+	pathname: string,
+	routingRule: string
+): boolean {
+	// sanity checks
+	if (!pathname) {
+		throw new Error("Pathname is undefined.");
+	}
+	if (!routingRule) {
+		throw new Error("Routing rule is undefined.");
+	}
+
+	const ruleRegExp = transformRoutingRuleToRegExp(routingRule);
+	return pathname.match(ruleRegExp) !== null;
+}
+
+function transformRoutingRuleToRegExp(rule: string): RegExp {
+	let transformedRule;
+
+	if (rule === "/" || rule === "/*") {
+		transformedRule = rule;
+	} else if (rule.endsWith("/*")) {
+		// make `/*` an optional group so we can match both /foo/* and /foo
+		// /foo/* => /foo(/*)?
+		transformedRule = `${rule.substring(0, rule.length - 2)}(/*)?`;
+	} else if (rule.endsWith("/")) {
+		// make `/` an optional group so we can match both /foo/ and /foo
+		// /foo/ => /foo(/)?
+		transformedRule = `${rule.substring(0, rule.length - 1)}(/)?`;
+	} else if (rule.endsWith("*")) {
+		transformedRule = rule;
+	} else {
+		transformedRule = `${rule}(/)?`;
+	}
+
+	// /foo* => /foo.* => ^/foo.*$
+	// /*.* => /*\.* => /.*\..* => ^/.*\..*$
+	transformedRule = `^${transformedRule
+		.replaceAll(/\./g, "\\.")
+		.replaceAll(/\*/g, ".*")}$`;
+
+	// ^/foo.*$ => /^\/foo.*$/
+	return new RegExp(transformedRule);
+}