forked from EVOgeek/Vmeda.Online
291 lines
10 KiB
TypeScript
291 lines
10 KiB
TypeScript
// (C) Copyright 2015 Moodle Pty Ltd.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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import { Component, Input, ElementRef, OnInit, OnDestroy, OnChanges, SimpleChange } from '@angular/core';
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import { CoreApp } from '@providers/app';
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import { CoreEvents } from '@providers/events';
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import { CoreFile } from '@providers/file';
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import { CoreFilepool } from '@providers/filepool';
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import { CoreLogger } from '@providers/logger';
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import { CoreSites } from '@providers/sites';
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import { CoreDomUtils } from '@providers/utils/dom';
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import { CoreUrlUtils } from '@providers/utils/url';
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import { CoreH5P } from '@core/h5p/providers/h5p';
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import { CorePluginFileDelegate } from '@providers/plugin-file-delegate';
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import { CoreFileHelper } from '@providers/file-helper';
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import { CoreConstants } from '@core/constants';
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import { CoreSite } from '@classes/site';
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import { CoreH5PCore } from '../../classes/core';
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import { CoreH5PHelper } from '../../classes/helper';
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/**
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* Component to render an H5P package.
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*/
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@Component({
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selector: 'core-h5p-player',
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templateUrl: 'core-h5p-player.html'
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})
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export class CoreH5PPlayerComponent implements OnInit, OnChanges, OnDestroy {
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@Input() src: string; // The URL of the player to display the H5P package.
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@Input() component?: string; // Component.
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@Input() componentId?: string | number; // Component ID to use in conjunction with the component.
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playerSrc: string;
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showPackage = false;
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loading = false;
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state: string;
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canDownload: boolean;
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calculating = true;
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protected site: CoreSite;
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protected siteId: string;
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protected siteCanDownload: boolean;
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protected observer;
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protected urlParams;
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protected logger;
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constructor(public elementRef: ElementRef,
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protected pluginFileDelegate: CorePluginFileDelegate) {
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this.logger = CoreLogger.instance.getInstance('CoreH5PPlayerComponent');
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this.site = CoreSites.instance.getCurrentSite();
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this.siteId = this.site.getId();
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this.siteCanDownload = this.site.canDownloadFiles() && !CoreH5P.instance.isOfflineDisabledInSite();
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}
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/**
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* Component being initialized.
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*/
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ngOnInit(): void {
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this.checkCanDownload();
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}
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/**
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* Detect changes on input properties.
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*/
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ngOnChanges(changes: {[name: string]: SimpleChange}): void {
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// If it's already playing there's no need to check if it can be downloaded.
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if (changes.src && !this.showPackage) {
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this.checkCanDownload();
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}
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}
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/**
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* Play the H5P.
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*
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* @param e Event.
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*/
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async play(e: MouseEvent): Promise<void> {
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e.preventDefault();
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e.stopPropagation();
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this.loading = true;
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let localUrl: string;
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const displayOptions = CoreH5P.instance.h5pPlayer.getDisplayOptionsFromUrlParams(this.urlParams);
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if (this.canDownload && CoreFileHelper.instance.isStateDownloaded(this.state)) {
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// Package is downloaded, use the local URL.
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try {
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localUrl = await CoreH5P.instance.h5pPlayer.getContentIndexFileUrl(this.urlParams.url, displayOptions, this.siteId);
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} catch (error) {
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// Index file doesn't exist, probably deleted because a lib was updated. Try to create it again.
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try {
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const path = await CoreFilepool.instance.getInternalUrlByUrl(this.siteId, this.urlParams.url);
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const file = await CoreFile.instance.getFile(path);
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await CoreH5PHelper.saveH5P(this.urlParams.url, file, this.siteId);
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// File treated. Try to get the index file URL again.
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localUrl = await CoreH5P.instance.h5pPlayer.getContentIndexFileUrl(this.urlParams.url, displayOptions,
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this.siteId);
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} catch (error) {
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// Still failing. Delete the H5P package?
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this.logger.error('Error loading downloaded index:', error, this.src);
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}
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}
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}
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try {
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if (localUrl) {
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// Local package.
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this.playerSrc = localUrl;
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} else {
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// Never allow downloading in the app. This will only work if the user is allowed to change the params.
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const src = this.src && this.src.replace(CoreH5PCore.DISPLAY_OPTION_DOWNLOAD + '=1',
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CoreH5PCore.DISPLAY_OPTION_DOWNLOAD + '=0');
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// Get auto-login URL so the user is automatically authenticated.
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const url = await CoreSites.instance.getCurrentSite().getAutoLoginUrl(src, false);
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// Add the preventredirect param so the user can authenticate.
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this.playerSrc = CoreUrlUtils.instance.addParamsToUrl(url, {preventredirect: false});
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}
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} finally {
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this.addResizerScript();
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this.loading = false;
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this.showPackage = true;
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if (this.canDownload && (this.state == CoreConstants.OUTDATED || this.state == CoreConstants.NOT_DOWNLOADED)) {
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// Download the package in background if the size is low.
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try {
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this.attemptDownloadInBg();
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} catch (error) {
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this.logger.error('Error downloading H5P in background', error);
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}
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}
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}
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}
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/**
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* Download the package.
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*
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* @return Promise resolved when done.
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*/
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async download(e: Event): Promise<void> {
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e && e.preventDefault();
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e && e.stopPropagation();
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if (!CoreApp.instance.isOnline()) {
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CoreDomUtils.instance.showErrorModal('core.networkerrormsg', true);
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return;
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}
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try {
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// Get the file size and ask the user to confirm.
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const size = await this.pluginFileDelegate.getFileSize({fileurl: this.urlParams.url}, this.siteId);
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await CoreDomUtils.instance.confirmDownloadSize({ size: size, total: true });
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// User confirmed, add to the queue.
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await CoreFilepool.instance.addToQueueByUrl(this.siteId, this.urlParams.url, this.component, this.componentId);
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} catch (error) {
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if (CoreDomUtils.instance.isCanceledError(error)) {
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// User cancelled, stop.
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return;
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}
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CoreDomUtils.instance.showErrorModalDefault(error, 'core.errordownloading', true);
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this.calculateState();
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}
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}
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/**
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* Download the H5P in background if the size is low.
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*
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* @return Promise resolved when done.
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*/
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protected async attemptDownloadInBg(): Promise<void> {
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if (this.urlParams && this.src && this.siteCanDownload && CoreH5P.instance.canGetTrustedH5PFileInSite() &&
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CoreApp.instance.isOnline()) {
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// Get the file size.
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const size = await this.pluginFileDelegate.getFileSize({fileurl: this.urlParams.url}, this.siteId);
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if (CoreFilepool.instance.shouldDownload(size)) {
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// Download the file in background.
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CoreFilepool.instance.addToQueueByUrl(this.siteId, this.urlParams.url, this.component, this.componentId);
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}
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}
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}
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/**
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* Add the resizer script if it hasn't been added already.
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*/
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protected addResizerScript(): void {
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if (document.head.querySelector('#core-h5p-resizer-script') != null) {
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// Script already added, don't add it again.
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return;
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}
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const script = document.createElement('script');
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script.id = 'core-h5p-resizer-script';
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script.type = 'text/javascript';
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script.src = CoreH5P.instance.h5pPlayer.getResizerScriptUrl();
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document.head.appendChild(script);
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}
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/**
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* Check if the package can be downloaded.
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*
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* @return Promise resolved when done.
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*/
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protected async checkCanDownload(): Promise<void> {
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this.observer && this.observer.off();
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this.urlParams = CoreUrlUtils.instance.extractUrlParams(this.src);
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if (this.src && this.siteCanDownload && CoreH5P.instance.canGetTrustedH5PFileInSite() && this.site.containsUrl(this.src)) {
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this.calculateState();
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// Listen for changes in the state.
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try {
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const eventName = await CoreFilepool.instance.getFileEventNameByUrl(this.siteId, this.urlParams.url);
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this.observer = CoreEvents.instance.on(eventName, () => {
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this.calculateState();
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});
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} catch (error) {
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// An error probably means the file cannot be downloaded or we cannot check it (offline).
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}
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} else {
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this.calculating = false;
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this.canDownload = false;
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}
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}
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/**
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* Calculate state of the file.
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*
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* @param fileUrl The H5P file URL.
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* @return Promise resolved when done.
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*/
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protected async calculateState(): Promise<void> {
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this.calculating = true;
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// Get the status of the file.
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try {
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const state = await CoreFilepool.instance.getFileStateByUrl(this.siteId, this.urlParams.url);
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this.canDownload = true;
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this.state = state;
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} catch (error) {
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this.canDownload = false;
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} finally {
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this.calculating = false;
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}
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}
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/**
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* H5P iframe has been loaded.
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*/
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iframeLoaded(): void {
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// Send a resize event to the window so H5P package recalculates the size.
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window.dispatchEvent(new Event('resize'));
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}
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/**
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* Component destroyed.
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*/
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ngOnDestroy(): void {
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this.observer && this.observer.off();
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}
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}
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