Current File : //home2/vacivi36/ava/grade/amd/src/grades/grader/gradingpanel/comparison.js
// 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/>.
/**
* Compare a given form's values and its previously set data attributes.
*
* @module core_grades/grades/grader/gradingpanel/comparison
* @copyright 2019 Mathew May <mathew.solutions>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
export const fillInitialValues = (form) => {
Array.prototype.forEach.call(form.elements, (input) => {
if (input.type === 'submit' || input.type === 'button') {
return;
} else if (input.type === 'radio' || input.type === 'checkbox') {
input.dataset.initialValue = JSON.stringify(input.checked);
} else if (typeof input.value !== 'undefined') {
input.dataset.initialValue = JSON.stringify(input.value);
} else if (input.type === 'select-one') {
Array.prototype.forEach.call(input.options, (option) => {
option.dataset.initialValue = JSON.stringify(option.selected);
});
}
});
};
/**
* Compare the form data with the initial form data from when the form was set up.
*
* If values have changed, return a truthy value.
*
* @param {HTMLElement} form
* @return {Boolean}
*/
export const compareData = (form) => {
const result = Array.prototype.some.call(form.elements, (input) => {
if (input.type === 'submit' || input.type === 'button') {
return false;
} else if (input.type === 'radio' || input.type === 'checkbox') {
if (typeof input.dataset.initialValue !== 'undefined') {
return input.dataset.initialValue !== JSON.stringify(input.checked);
}
} else if (typeof input.value !== 'undefined') {
if (typeof input.dataset.initialValue !== 'undefined') {
return input.dataset.initialValue !== JSON.stringify(input.value);
}
} else if (input.type === 'select-one') {
return Array.prototype.some.call(input.options, (option) => {
if (typeof option.dataset.initialValue !== 'undefined') {
return option.dataset.initialValue !== JSON.stringify(option.selected);
}
return false;
});
}
// No value found to check. Assume that there were changes.
return true;
});
// Fill the initial values again as the form may not be reloaded.
fillInitialValues(form);
return result;
};
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