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// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * URL utility functions.
 *
 * @module     core/url
 * @package    core
 * @class      url
 * @copyright  2015 Damyon Wiese <damyon@moodle.com>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 * @since      2.9
 */
define(['jquery', 'core/config'], function($, config) {

return /** @alias module:core/url */ {
        // Public variables and functions.
        /**
         * Construct a file url
         *
         * @method fileUrl
         * @param {string} relativeScript
         * @param {string} slashArg
         * @return {string}
         */
        fileUrl: function(relativeScript, slashArg) {

var url = config.wwwroot + relativeScript;

// Force a /
            if (slashArg.charAt(0) != '/') {
                slashArg = '/' + slashArg;
            }
            if (config.slasharguments) {
                url += slashArg;
            } else {
                url += '?file=' + encodeURIComponent(slashArg);
            }
            return url;
        },

/**
         * Take a path relative to the moodle basedir and do some fixing (see class moodle_url in php).
         *
         * @method relativeUrl
         * @param {string} relativePath The path relative to the moodle basedir.
         * @param {object} params The query parameters for the URL.
         * @param {bool} includeSessKey Add the session key to the query params.
         * @return {string}
         */
        relativeUrl: function(relativePath, params, includeSessKey) {

if (relativePath.indexOf('http:') === 0 || relativePath.indexOf('https:') === 0 || relativePath.indexOf('://') >= 0) {
                throw new Error('relativeUrl function does not accept absolute urls');
            }

// Fix non-relative paths;
            if (relativePath.charAt(0) != '/') {
                relativePath = '/' + relativePath;
            }

// Fix admin urls.
            if (config.admin !== 'admin') {
                relativePath = relativePath.replace(/^\/admin\//, '/' + config.admin + '/');
            }

params = params || {};
            if (includeSessKey) {
                params.sesskey = config.sesskey;
            }

var queryString = '';
            if (Object.keys(params).length) {
                queryString = $.map(params, function(value, param) {
                    return param + '=' + value;
                }).join('&');
            }

if (queryString !== '') {
                return config.wwwroot + relativePath + '?' + queryString;
            } else {
                return config.wwwroot + relativePath;
            }
        },

/**
         * Wrapper for image_url function.
         *
         * @method imageUrl
         * @param {string} imagename The image name (e.g. t/edit).
         * @param {string} component The component (e.g. mod_feedback).
         * @return {string}
         */
        imageUrl: function(imagename, component) {
            return M.util.image_url(imagename, component);
        }
    };
});