@vaadin/hilla-file-router/vite-plugin/utils.js

Hilla file-based router

import { RouteParamType } from "../shared/routeParamType.js";
export const routeParamTypeMap = new Map([
	[RouteParamType.Wildcard, /\{\.\.\.(.+)\}/gu],
	[RouteParamType.Optional, /\{\{(.+)\}\}/gu],
	[RouteParamType.Required, /\{(.+)\}/gu]
]);
function getReplacer(type) {
	switch (type) {
		case RouteParamType.Wildcard: return "*";
		case RouteParamType.Optional: return ":$1?";
		case RouteParamType.Required: return ":$1";
	}
}
/**
* Converts a file system pattern to an URL pattern string.
*
* @param segment - a string representing a file system pattern:
* - `{param}` - for a required single parameter;
* - `{{param}}` - for an optional single parameter;
* - `{...wildcard}` - for multiple parameters, including none.
*
* @returns a string representing a URL pattern, respectively:
* - `:param`;
* - `:param?`;
* - `*`.
*/
export function convertFSRouteSegmentToURLPatternFormat(segment) {
	let res = segment;
	routeParamTypeMap.forEach((pattern, type) => {
		res = res.replaceAll(pattern, getReplacer(type));
	});
	return res;
}
/**
* Extracts the parameter name and its type from the route segment.
*
* @param segment - A part of the FS route URL.
* @returns A map of parameter names and their types.
*/
export function extractParameterFromRouteSegment(segment) {
	let _segment = segment;
	const params = {};
	for (const [type, pattern] of routeParamTypeMap) {
		const _pattern = new RegExp(pattern.source, pattern.flags);
		_segment = _segment.replaceAll(_pattern, (match) => {
			const key = match.replaceAll(pattern, getReplacer(type));
			params[key] = type;
			return "";
		});
	}
	return params;
}
/**
* A small helper function that clears route path of the control characters in
* order to sort the routes alphabetically.
*/
export function cleanUp(path) {
	let res = path;
	for (const pattern of routeParamTypeMap.values()) {
		res = res.replaceAll(pattern, "$1");
	}
	return res;
}
export function strip(path) {
	return path.replace(/^\/*(.+)\/*$/u, "$1");
}
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