File: public/assets/local/js/require.min.js

/**
 * A script library to import the javascript / css file on the fly
 *
 * @author     Aby Dahana <abydahana@gmail.com>
 * @copyright  (c) Aksara Laboratory <https://aksaracms.com>
 * @license    MIT License
 *
 * This source file is subject to the MIT license that is bundled with this
 * source code in the LICENSE.txt file.
 */
"use strict";

let loaded_sources = [];

const require = (function() {
    return {
        js: async function(sources, callback) {
            if (typeof $ === 'undefined') {
                console.log('jQuery is required to use require.js()');

                return;
            }

            if (! $.isArray(sources)) {
                sources = [sources];
            }

            let deferred = new $.Deferred(),
                pipe = deferred;

            sources.forEach(async function(source, index) {
                if ($.inArray(source, loaded_sources) === -1) {
                    loaded_sources.push(source);
                    
                    pipe = pipe.then(async function() {
                        if ((index + 1) === sources.length) {
                            await $.getScript(source, function() {
                                deferred.resolve();
                                
                                if (typeof callback === 'function') {
                                    return callback();
                                }
                            });
                        } else {
                            return await $.getScript(source);
                        }
                    });
                } else if ((index + 1) === sources.length && typeof callback === 'function') {
                    return callback();
                }
            });

            deferred.resolve();
        },
        css: async function(sources, callback) {
            if (typeof $ === 'undefined') {
                console.log('jQuery is required to use require.css()');

                return;
            }

            if (! $.isArray(sources)) {
                sources = [sources];
            }

            sources.forEach(async function(source, index) {
                if ($.inArray(source, loaded_sources) === -1) {
                    loaded_sources.push(source);

                    $('<link rel="stylesheet" type="text/css" href="' + source + '" />').appendTo('head');

                    if ((index + 1) === sources.length && typeof callback === 'function') {
                        await callback.call();
                    }
                } else {
                    if ((index + 1) === sources.length && typeof callback === 'function') {
                        await callback.call();
                    }
                }
            });
        }
    }
})();