@patternslib/patternslib/src/core/url.js

Patternslib is a JavaScript library that enables designers to build rich interactive prototypes without the need for writing any Javascript. All events are triggered by classes and other attributes in the HTML, without abusing the HTML as a programming la

/**
 * Patterns URL - URL parsing utilities
 *
 * Copyright 2013 Simplon B.V.
 */

function UrlArgumentParser() {
    this._cache = null;
    if (window.addEventListener) window.addEventListener("popstate", this._reset);
}

UrlArgumentParser.prototype = {
    space_pattern: /\+/g,
    keyvalue_pattern: /^(.+?)(?:=(.*))/,

    _reset: function UrlArgumentParser_reset() {
        this._cache = null;
    },

    _decodeQS: function UrlArgumentParser_decodeQS(bit) {
        return decodeURIComponent(bit.replace(this.space_pattern, " "));
    },

    _parse: function UrlArgumentParser_parse(qs) {
        var query = /\?(.+)/.exec(qs),
            params = {};

        if (query === null) return params;

        var parameters = query[1].split("&"),
            i,
            parts,
            key,
            value;

        for (i = 0; i < parameters.length; i++) {
            if ((parts = this.keyvalue_pattern.exec(parameters[i])) === null) {
                key = this._decodeQS(parameters[i]);
                value = null;
            } else {
                key = this._decodeQS(parts[1]);
                value = this._decodeQS(parts[2]);
            }

            if (params[key] === undefined) params[key] = [];
            params[key].push(value);
        }

        return params;
    },

    get: function UrlArgumentParser_get() {
        if (this._cache === null) this._cache = this._parse(window.location.search);
        return this._cache;
    },
};

var url_parser = new UrlArgumentParser();

export default {
    UrlArgumentParser: UrlArgumentParser,
    parameters: url_parser.get.bind(url_parser),
};