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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* @module core_group/groupPicker
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* @copyright 2022 Matthew Hilton <matthewhilton@catalyst-au.net>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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/**
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* Class used for interfacing with the group select picker.
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*
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* @class core_group/GroupPicker
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*/
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export default class GroupPicker {
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/**
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* Creates the group picker class and finds the corresponding DOM element.
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*
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* @param {String} elementId The DOM element id of the <select> input
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* @throws Error if the element was not found.
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*/
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constructor(elementId = "groups") {
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const pickerDomElement = document.getElementById(elementId);
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if (!pickerDomElement) {
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throw new Error("Groups picker was not found.");
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}
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this.element = pickerDomElement;
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}
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/**
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* Returns the DOM element this class is linked to.
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*
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* @returns {HTMLElement} The DOM element
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*/
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getDomElement() {
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return this.element;
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}
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/**
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* Returns the selected group values.
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*
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* @returns {Number[]} The group IDs that are currently selected.
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*/
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getSelectedValues() {
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const selectedOptionElements = Array.from(this.element.querySelectorAll("option:checked"));
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const selectedGroups = selectedOptionElements.map(el => parseInt(el.value));
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return selectedGroups;
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}
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}
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