379 lines
15 KiB
TypeScript
379 lines
15 KiB
TypeScript
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// (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 { Injectable } from '@angular/core';
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import { CoreApp } from '@services/app';
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import { CoreFile } from '@services/file';
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import { CoreFilepool } from '@services/filepool';
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import { CoreSites } from '@services/sites';
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import { CoreWS } from '@services/ws';
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import { CoreDomUtils } from '@services/utils/dom';
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import { CoreUrlUtils } from '@services/utils/url';
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import { CoreUtils } from '@services/utils/utils';
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import { CoreConstants } from '@core/constants';
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import { makeSingleton, Translate } from '@singletons/core.singletons';
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/**
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* Provider to provide some helper functions regarding files and packages.
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*/
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@Injectable()
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export class CoreFileHelperProvider {
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/**
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* Convenience function to open a file, downloading it if needed.
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*
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* @param file The file to download.
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* @param component The component to link the file to.
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* @param componentId An ID to use in conjunction with the component.
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* @param state The file's state. If not provided, it will be calculated.
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* @param onProgress Function to call on progress.
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* @param siteId The site ID. If not defined, current site.
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* @return Resolved on success.
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*/
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async downloadAndOpenFile(file: any, component: string, componentId: string | number, state?: string,
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onProgress?: (event: any) => any, siteId?: string): Promise<void> {
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siteId = siteId || CoreSites.instance.getCurrentSiteId();
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const fileUrl = this.getFileUrl(file);
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const timemodified = this.getFileTimemodified(file);
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if (!this.isOpenableInApp(file)) {
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await this.showConfirmOpenUnsupportedFile();
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}
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let url = await this.downloadFileIfNeeded(file, fileUrl, component, componentId, timemodified, state, onProgress, siteId);
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if (!url) {
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return;
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}
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if (!CoreUrlUtils.instance.isLocalFileUrl(url)) {
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/* In iOS, if we use the same URL in embedded browser and background download then the download only
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downloads a few bytes (cached ones). Add a hash to the URL so both URLs are different. */
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url = url + '#moodlemobile-embedded';
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try {
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await CoreUtils.instance.openOnlineFile(url);
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return;
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} catch (error) {
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// Error opening the file, some apps don't allow opening online files.
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if (!CoreFile.instance.isAvailable()) {
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throw error;
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}
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// Get the state.
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if (!state) {
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state = await CoreFilepool.instance.getFileStateByUrl(siteId, fileUrl, timemodified);
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}
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if (state == CoreConstants.DOWNLOADING) {
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throw new Error(Translate.instance.instant('core.erroropenfiledownloading'));
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}
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if (state === CoreConstants.NOT_DOWNLOADED) {
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// File is not downloaded, download and then return the local URL.
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url = await this.downloadFile(fileUrl, component, componentId, timemodified, onProgress, file, siteId);
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} else {
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// File is outdated and can't be opened in online, return the local URL.
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url = await CoreFilepool.instance.getInternalUrlByUrl(siteId, fileUrl);
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}
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}
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}
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return CoreUtils.instance.openFile(url);
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}
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/**
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* Download a file if it needs to be downloaded.
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*
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* @param file The file to download.
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* @param fileUrl The file URL.
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* @param component The component to link the file to.
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* @param componentId An ID to use in conjunction with the component.
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* @param timemodified The time this file was modified.
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* @param state The file's state. If not provided, it will be calculated.
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* @param onProgress Function to call on progress.
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* @param siteId The site ID. If not defined, current site.
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* @return Resolved with the URL to use on success.
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*/
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protected downloadFileIfNeeded(file: any, fileUrl: string, component?: string, componentId?: string | number,
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timemodified?: number, state?: string, onProgress?: (event: any) => any, siteId?: string): Promise<string> {
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siteId = siteId || CoreSites.instance.getCurrentSiteId();
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return CoreSites.instance.getSite(siteId).then((site) => {
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return site.checkAndFixPluginfileURL(fileUrl);
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}).then((fixedUrl) => {
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if (CoreFile.instance.isAvailable()) {
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let promise;
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if (state) {
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promise = Promise.resolve(state);
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} else {
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// Calculate the state.
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promise = CoreFilepool.instance.getFileStateByUrl(siteId, fileUrl, timemodified);
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}
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return promise.then((state) => {
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// The file system is available.
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const isWifi = CoreApp.instance.isWifi();
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const isOnline = CoreApp.instance.isOnline();
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if (state == CoreConstants.DOWNLOADED) {
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// File is downloaded, get the local file URL.
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return CoreFilepool.instance.getUrlByUrl(
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siteId, fileUrl, component, componentId, timemodified, false, false, file);
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} else {
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if (!isOnline && !this.isStateDownloaded(state)) {
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// Not downloaded and user is offline, reject.
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return Promise.reject(Translate.instance.instant('core.networkerrormsg'));
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}
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if (onProgress) {
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// This call can take a while. Send a fake event to notify that we're doing some calculations.
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onProgress({calculating: true});
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}
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return CoreFilepool.instance.shouldDownloadBeforeOpen(fixedUrl, file.filesize).then(() => {
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if (state == CoreConstants.DOWNLOADING) {
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// It's already downloading, stop.
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return;
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}
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// Download and then return the local URL.
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return this.downloadFile(fileUrl, component, componentId, timemodified, onProgress, file, siteId);
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}, () => {
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// Start the download if in wifi, but return the URL right away so the file is opened.
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if (isWifi) {
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this.downloadFile(fileUrl, component, componentId, timemodified, onProgress, file, siteId);
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}
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if (!this.isStateDownloaded(state) || isOnline) {
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// Not downloaded or online, return the online URL.
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return fixedUrl;
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} else {
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// Outdated but offline, so we return the local URL.
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return CoreFilepool.instance.getUrlByUrl(
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siteId, fileUrl, component, componentId, timemodified, false, false, file);
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}
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});
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}
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});
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} else {
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// Use the online URL.
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return fixedUrl;
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}
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});
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}
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/**
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* Download the file.
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*
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* @param fileUrl The file URL.
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* @param component The component to link the file to.
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* @param componentId An ID to use in conjunction with the component.
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* @param timemodified The time this file was modified.
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* @param onProgress Function to call on progress.
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* @param file The file to download.
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* @param siteId The site ID. If not defined, current site.
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* @return Resolved with internal URL on success, rejected otherwise.
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*/
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downloadFile(fileUrl: string, component?: string, componentId?: string | number, timemodified?: number,
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onProgress?: (event: any) => any, file?: any, siteId?: string): Promise<string> {
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siteId = siteId || CoreSites.instance.getCurrentSiteId();
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// Get the site and check if it can download files.
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return CoreSites.instance.getSite(siteId).then((site) => {
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if (!site.canDownloadFiles()) {
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return Promise.reject(Translate.instance.instant('core.cannotdownloadfiles'));
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}
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return CoreFilepool.instance.downloadUrl(siteId, fileUrl, false, component, componentId,
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timemodified, onProgress, undefined, file).catch((error) => {
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// Download failed, check the state again to see if the file was downloaded before.
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return CoreFilepool.instance.getFileStateByUrl(siteId, fileUrl, timemodified).then((state) => {
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if (this.isStateDownloaded(state)) {
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return CoreFilepool.instance.getInternalUrlByUrl(siteId, fileUrl);
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} else {
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return Promise.reject(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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/**
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* Get the file's URL.
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*
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* @param file The file.
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*/
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getFileUrl(file: any): string {
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return file.fileurl || file.url;
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}
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/**
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* Get the file's timemodified.
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*
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* @param file The file.
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*/
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getFileTimemodified(file: any): number {
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return file.timemodified || 0;
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}
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/**
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* Check if a state is downloaded or outdated.
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*
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* @param state The state to check.
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*/
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isStateDownloaded(state: string): boolean {
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return state === CoreConstants.DOWNLOADED || state === CoreConstants.OUTDATED;
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}
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/**
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* Whether the file has to be opened in browser (external repository).
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* The file must have a mimetype attribute.
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*
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* @param file The file to check.
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* @return Whether the file should be opened in browser.
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*/
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shouldOpenInBrowser(file: any): boolean {
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if (!file || !file.isexternalfile || !file.mimetype) {
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return false;
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}
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const mimetype = file.mimetype;
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if (mimetype.indexOf('application/vnd.google-apps.') != -1) {
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// Google Docs file, always open in browser.
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return true;
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}
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if (file.repositorytype == 'onedrive') {
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// In OneDrive, open in browser the office docs
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return mimetype.indexOf('application/vnd.openxmlformats-officedocument') != -1 ||
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mimetype == 'text/plain' || mimetype == 'document/unknown';
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}
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return false;
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}
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/**
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* Calculate the total size of the given files.
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*
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* @param files The files to check.
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* @return Total files size.
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*/
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async getTotalFilesSize(files: any[]): Promise<number> {
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let totalSize = 0;
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for (const file of files) {
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totalSize += await this.getFileSize(file);
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}
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return totalSize;
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}
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/**
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* Calculate the file size.
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*
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* @param file The file to check.
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* @return File size.
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*/
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async getFileSize(file: any): Promise<number> {
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if (file.filesize) {
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return file.filesize;
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}
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// If it's a remote file. First check if we have the file downloaded since it's more reliable.
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if (file.filename && !file.name) {
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try {
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const siteId = CoreSites.instance.getCurrentSiteId();
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const path = await CoreFilepool.instance.getFilePathByUrl(siteId, file.fileurl);
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const fileEntry = await CoreFile.instance.getFile(path);
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const fileObject = await CoreFile.instance.getFileObjectFromFileEntry(fileEntry);
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return fileObject.size;
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} catch (error) {
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// Error getting the file, maybe it's not downloaded. Get remote size.
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const size = await CoreWS.instance.getRemoteFileSize(file.fileurl);
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if (size === -1) {
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throw new Error('Couldn\'t determine file size: ' + file.fileurl);
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}
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return size;
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}
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}
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// If it's a local file, get its size.
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if (file.name) {
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const fileObject = await CoreFile.instance.getFileObjectFromFileEntry(file);
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return fileObject.size;
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}
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throw new Error('Couldn\'t determine file size: ' + file.fileurl);
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}
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/**
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* Is the file openable in app.
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*
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* @param file The file to check.
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* @return bool.
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*/
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isOpenableInApp(file: {filename?: string, name?: string}): boolean {
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const re = /(?:\.([^.]+))?$/;
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const ext = re.exec(file.filename || file.name)[1];
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return !this.isFileTypeExcludedInApp(ext);
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}
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/**
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* Show a confirm asking the user if we wants to open the file.
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*
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* @param onlyDownload Whether the user is only downloading the file, not opening it.
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* @return Promise resolved if confirmed, rejected otherwise.
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*/
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showConfirmOpenUnsupportedFile(onlyDownload?: boolean): Promise<void> {
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const message = Translate.instance.instant('core.cannotopeninapp' + (onlyDownload ? 'download' : ''));
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const okButton = Translate.instance.instant(onlyDownload ? 'core.downloadfile' : 'core.openfile');
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return CoreDomUtils.instance.showConfirm(message, undefined, okButton, undefined, { cssClass: 'core-modal-force-on-top' });
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}
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/**
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* Is the file type excluded to open in app.
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*
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* @param file The file to check.
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* @return bool.
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*/
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isFileTypeExcludedInApp(fileType: string): boolean {
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const currentSite = CoreSites.instance.getCurrentSite();
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const fileTypeExcludeList = currentSite && currentSite.getStoredConfig('tool_mobile_filetypeexclusionlist');
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if (!fileTypeExcludeList) {
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return false;
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}
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const regEx = new RegExp('(,|^)' + fileType + '(,|$)', 'g');
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return !!fileTypeExcludeList.match(regEx);
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}
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}
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export class CoreFileHelper extends makeSingleton(CoreFileHelperProvider) {}
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