// 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/>.
/**
* Course index cm component.
*
* This component is used to control specific course modules interactions like drag and drop.
*
* @module core_courseformat/local/courseindex/cm
* @class core_courseformat/local/courseindex/cm
* @copyright 2021 Ferran Recio <ferran@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
import DndCmItem from 'core_courseformat/local/courseeditor/dndcmitem';
import Templates from 'core/templates';
import Prefetch from 'core/prefetch';
import Config from 'core/config';
import Pending from "core/pending";
// Prefetch the completion icons template.
const completionTemplate = 'core_courseformat/local/courseindex/cmcompletion';
Prefetch.prefetchTemplate(completionTemplate);
export default class Component extends DndCmItem {
/**
* Constructor hook.
*/
create() {
// Optional component name for debugging.
this.name = 'courseindex_cm';
// Default query selectors.
this.selectors = {
CM_NAME: `[data-for='cm_name']`,
CM_COMPLETION: `[data-for='cm_completion']`,
};
// Default classes to toggle on refresh.
this.classes = {
CMHIDDEN: 'dimmed',
LOCKED: 'editinprogress',
RESTRICTIONS: 'restrictions',
PAGEITEM: 'pageitem',
INDENTED: 'indented',
};
// We need our id to watch specific events.
this.id = this.element.dataset.id;
}
/**
* Static method to create a component instance form the mustache template.
*
* @param {element|string} target the DOM main element or its ID
* @param {object} selectors optional css selector overrides
* @return {Component}
*/
static init(target, selectors) {
return new this({
element: document.getElementById(target),
selectors,
});
}
/**
* Initial state ready method.
*
* @param {Object} state the course state.
*/
stateReady(state) {
this.configDragDrop(this.id);
const cm = state.cm.get(this.id);
const course = state.course;
// Refresh completion icon.
this._refreshCompletion({
state,
element: cm,
});
const url = new URL(window.location.href);
const anchor = url.hash.replace('#', '');
// Check if the current url is the cm url.
if (window.location.href == cm.url
|| (window.location.href.includes(course.baseurl) && anchor == cm.anchor)
) {
this.element.scrollIntoView({block: "center"});
}
// Check if this we are displaying this activity page.
if (Config.contextid != Config.courseContextId && Config.contextInstanceId == this.id) {
this.reactive.dispatch('setPageItem', 'cm', this.id, true);
this.element.scrollIntoView({block: "center"});
}
// Add anchor logic if the element is not user visible or the element hasn't URL.
if (!cm.uservisible || !cm.url) {
const element = this.getElement(this.selectors.CM_NAME);
this.addEventListener(
element,
'click',
this._activityAnchor,
);
// If the element is not user visible we also need to update the anchor link including the section page.
if (!document.getElementById(cm.anchor)) {
element.setAttribute('href', this._getActivitySectionURL(cm));
}
}
}
/**
* Component watchers.
*
* @returns {Array} of watchers
*/
getWatchers() {
return [
{watch: `cm[${this.id}]:deleted`, handler: this.remove},
{watch: `cm[${this.id}]:updated`, handler: this._refreshCm},
{watch: `cm[${this.id}].completionstate:updated`, handler: this._refreshCompletion},
{watch: `course.pageItem:updated`, handler: this._refreshPageItem},
];
}
/**
* Update a course index cm using the state information.
*
* @param {object} param
* @param {Object} param.element details the update details.
*/
_refreshCm({element}) {
// Update classes.
this.element.classList.toggle(this.classes.CMHIDDEN, !element.visible);
this.getElement(this.selectors.CM_NAME).innerHTML = element.name;
this.element.classList.toggle(this.classes.DRAGGING, element.dragging ?? false);
this.element.classList.toggle(this.classes.LOCKED, element.locked ?? false);
this.element.classList.toggle(this.classes.RESTRICTIONS, element.hascmrestrictions ?? false);
this.element.classList.toggle(this.classes.INDENTED, element.indent);
this.locked = element.locked;
}
/**
* Handle a page item update.
*
* @param {Object} details the update details
* @param {Object} details.element the course state data.
*/
_refreshPageItem({element}) {
if (!element.pageItem) {
return;
}
const isPageId = (element.pageItem.type == 'cm' && element.pageItem.id == this.id);
this.element.classList.toggle(this.classes.PAGEITEM, isPageId);
if (isPageId && !this.reactive.isEditing) {
this.element.scrollIntoView({block: "nearest"});
}
}
/**
* Update the activity completion icon.
*
* @param {Object} details the update details
* @param {Object} details.state the state data
* @param {Object} details.element the element data
*/
async _refreshCompletion({state, element}) {
// No completion icons are displayed in edit mode.
if (this.reactive.isEditing || !element.istrackeduser) {
return;
}
// Check if the completion value has changed.
const completionElement = this.getElement(this.selectors.CM_COMPLETION);
if (!completionElement || completionElement.dataset.value == element.completionstate) {
return;
}
// Collect section information from the state.
const exporter = this.reactive.getExporter();
const data = exporter.cmCompletion(state, element);
const {html, js} = await Templates.renderForPromise(completionTemplate, data);
Templates.replaceNode(completionElement, html, js);
}
/**
* The activity anchor event.
*
* @param {Event} event
*/
_activityAnchor(event) {
const cm = this.reactive.get('cm', this.id);
// If the user cannot access the element but the element is present in the page
// the new url should be an anchor link.
const element = document.getElementById(cm.anchor);
if (element) {
// Make sure the section is expanded.
this.reactive.dispatch('sectionContentCollapsed', [cm.sectionid], false);
// Marc the element as page item once the event is handled.
const pendingAnchor = new Pending(`courseformat/activity:openAnchor`);
setTimeout(() => {
this.reactive.dispatch('setPageItem', 'cm', cm.id);
pendingAnchor.resolve();
}, 50);
return;
}
// If the element is not present in the page we need to go to the specific section.
event.preventDefault();
window.location = this._getActivitySectionURL(cm);
}
/**
* Get the anchor link in section page for the cm.
*
* @param {Object} cm the course module data.
* @return {String} the anchor link.
*/
_getActivitySectionURL(cm) {
let section = this.reactive.get('section', cm.sectionid);
// If the section is delegated get its parent section if it has one.
if (section.component && section.parentsectionid) {
section = this.reactive.get('section', section.parentsectionid);
}
if (!section) {
return '#';
}
return `${section.sectionurl}#${cm.anchor}`;
}
}