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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/>.
/**
* Simple method to check for changes to a form between two points in time.
*
* @module mod_assign/grading_form_change_checker
* @package mod_assign
* @copyright 2016 Damyon Wiese <damyon@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @since 3.1
*/
define(['jquery'], function($) {
return /** @alias module:mod_assign/grading_form_change_checker */ {
/**
* Save the values in the form to a data attribute so they can be compared later for changes.
*
* @method saveFormState
* @param {String} selector The selector for the form element.
*/
saveFormState: function(selector) {
$(selector).trigger('save-form-state');
var data = $(selector).serialize();
$(selector).data('saved-form-state', data);
},
/**
* Compare the current values in the form to the previously saved state.
*
* @method checkFormForChanges
* @param {String} selector The selector for the form element.
* @return {Boolean} True if there are changes to the form data.
*/
checkFormForChanges: function(selector) {
$(selector).trigger('save-form-state');
var data = $(selector).serialize(),
previousdata = $(selector).data('saved-form-state');
if (typeof previousdata === 'undefined') {
return false;
}
return (previousdata != data);
}
};
});