app-decorators/src/helpers/queryString.js

Collection of useful ES7 Decorators, writtin in ES6, that can be used for building webapps

System.register(['app-decorators/src/libs/element-to-function'], function (_export, _context) {
    "use strict";

    var _elementToFunc, queryString;

    return {
        setters: [function (_appDecoratorsSrcLibsElementToFunction) {
            _elementToFunc = _appDecoratorsSrcLibsElementToFunction.default;
        }],
        execute: function () {
            _export('queryString', queryString = {
                parse: function parse() {
                    var query = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : '';


                    // cleanup
                    query = query.trim().replace(/^(\?|#|&)/g, '');

                    if (!query || query === ' ') {
                        return {};
                    }

                    // init
                    var searchParams = new URLSearchParams(decodeURIComponent(query));
                    var queryObject = Object.create(null);

                    // build
                    var _iteratorNormalCompletion = true;
                    var _didIteratorError = false;
                    var _iteratorError = undefined;

                    try {
                        for (var _iterator = searchParams.entries()[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
                            var param = _step.value;


                            var key = param[0];
                            var value = param[1] || null;
                            var propertyValue = queryObject[key];

                            // foo=bar&key=val, foo&key
                            if (propertyValue === undefined && propertyValue !== null) {
                                queryObject[key] = value;
                            }
                            // foo=bar&foo=baz
                            else {
                                    if (this.classof(propertyValue) !== 'Array') {
                                        queryObject[key] = [propertyValue];
                                    }
                                    queryObject[key].push(value);
                                }
                        }
                    } catch (err) {
                        _didIteratorError = true;
                        _iteratorError = err;
                    } finally {
                        try {
                            if (!_iteratorNormalCompletion && _iterator.return) {
                                _iterator.return();
                            }
                        } finally {
                            if (_didIteratorError) {
                                throw _iteratorError;
                            }
                        }
                    }

                    return queryObject;
                },
                stringify: function stringify() {
                    var _this = this;

                    var queryObject = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
                    var encode = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;


                    // '', 0, 1, [], etc
                    if (this.classof(queryObject) !== 'Object') {
                        return '';
                    }

                    // {}
                    var queryObjectKeys = Object.keys(queryObject);
                    if (!queryObjectKeys.length) {
                        return '';
                    }

                    var raw_query = [];
                    queryObjectKeys.forEach(function (key) {

                        if (_this.classof(queryObject[key]) === 'Array') {

                            queryObject[key].forEach(function (propValue) {
                                // { bar: [undefined, 'baz'] }
                                if (propValue === undefined) return;
                                // bar: [null, 'baz']
                                if (propValue === null) {
                                    raw_query.push(key);
                                }
                                // { foo: ['bar', 'baz'] }
                                else {
                                        raw_query.push(key + '=' + propValue);
                                    }
                            });
                            return;
                        }
                        // { abc: undefined }
                        if (queryObject[key] === undefined) return;

                        // { 'def': null }
                        if (queryObject[key] === null) {
                            raw_query.push(key);
                        }
                        // { foo: 'baz' }
                        else {
                                raw_query.push(key + '=' + queryObject[key]);
                            }
                    });

                    var queryString = raw_query.join('&');

                    if (encode) {
                        var _ref = new URL('http://localhost?' + queryString),
                            search = _ref.search;

                        queryString = search.replace(/^\?/g, '');
                    }

                    return queryString;
                },
                classof: function classof(value) {
                    return Object.prototype.toString.call(value).slice(8, -1);
                }
            });

            _export('queryString', queryString);
        }
    };
});
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