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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/>.

/**
 * Search user selector module.
 *
 * @module core_search/form-search-user-selector
 * @class form-search-user-selector
 * @package core_search
 * @copyright 2017 The Open University
 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

define(['jquery', 'core/ajax', 'core/templates'], function($, Ajax, Templates) {

return /** @alias module:core_search/form-search-user-selector */ {

processResults: function(selector, results) {
            var users = [];
            $.each(results, function(index, user) {
                users.push({
                    value: user.id,
                    label: user._label
                });
            });
            return users;
        },

transport: function(selector, query, success, failure) {
            var promise;

// Search within specific course if known and if the 'search within' dropdown is set
            // to search within course or activity.
            var args = {query: query};
            var courseid = $(selector).attr('withincourseid');
            if (typeof courseid !== "undefined" && $('#id_searchwithin').val() !== '') {
                args.courseid = courseid;
            } else {
                args.courseid = 0;
            }

// Call AJAX request.
            promise = Ajax.call([{methodname: 'core_search_get_relevant_users', args: args}]);

// When AJAX request returns, handle the results.
            promise[0].then(function(results) {
                var promises = [];

// Render label with user name and picture.
                $.each(results, function(index, user) {
                    promises.push(Templates.render('core_search/form-user-selector-suggestion', user));
                });

// Apply the label to the results.
                return $.when.apply($.when, promises).then(function() {
                    var args = arguments;
                    var i = 0;
                    $.each(results, function(index, user) {
                        user._label = args[i++];
                    });
                    success(results);
                    return;
                });

}).fail(failure);
        }

};

});