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// (C) Copyright 2015 Moodle Pty Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import { Injectable } from '@angular/core';
import { Zip } from '@ionic-native/zip';
import * as JSZip from 'jszip';
import { File } from '@ionic-native/file';
import { CoreTextUtilsProvider } from '@providers/utils/text';
/**
* Emulates the Cordova Zip plugin in desktop apps and in browser.
*/
@Injectable()
export class ZipMock extends Zip {
constructor(private file: File, private textUtils: CoreTextUtilsProvider) {
super();
}
/**
* Create a directory. It creates all the foldes in dirPath 1 by 1 to prevent errors.
*
* @param destination Destination parent folder.
* @param dirPath Relative path to the folder.
* @return Promise resolved when done.
*/
protected createDir(destination: string, dirPath: string): Promise<void> {
// Create all the folders 1 by 1 in order, otherwise it fails.
const folders = dirPath.split('/');
let promise = Promise.resolve();
for (let i = 0; i < folders.length; i++) {
const folder = folders[i];
promise = promise.then(() => {
return this.file.createDir(destination, folder, true).then(() => {
// Folder created, add it to the destination path.
destination = this.textUtils.concatenatePaths(destination, folder);
});
});
}
return promise;
}
/**
* Extracts files from a ZIP archive.
*
* @param source Path to the source ZIP file.
* @param destination Destination folder.
* @param onProgress Optional callback to be called on progress update
* @return Promise that resolves with a number. 0 is success, -1 is error.
*/
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unzip(source: string, destination: string, onProgress?: Function): Promise<number> {
// Replace all %20 with spaces.
source = source.replace(/%20/g, ' ');
destination = destination.replace(/%20/g, ' ');
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const sourceDir = source.substring(0, source.lastIndexOf('/')),
sourceName = source.substr(source.lastIndexOf('/') + 1),
zip = new JSZip();
// Read the file first.
return this.file.readAsArrayBuffer(sourceDir, sourceName).then((data) => {
// Now load the file using the JSZip library.
return zip.loadAsync(data);
}).then((): any => {
if (!zip.files || !Object.keys(zip.files).length) {
// Nothing to extract.
return 0;
}
// First of all, create the directory where the files will be unzipped.
const destParent = destination.substring(0, source.lastIndexOf('/')),
destFolderName = destination.substr(source.lastIndexOf('/') + 1);
return this.file.createDir(destParent, destFolderName, false);
}).then(() => {
const promises = [],
total = Object.keys(zip.files).length;
let loaded = 0;
for (const name in zip.files) {
const file = zip.files[name];
let promise;
if (!file.dir) {
// It's a file.
const fileDir = name.substring(0, name.lastIndexOf('/')),
fileName = name.substr(name.lastIndexOf('/') + 1),
filePromises = [];
let fileData;
if (fileDir) {
// The file is in a subfolder, create it first.
filePromises.push(this.createDir(destination, fileDir));
}
// Read the file contents as a Blob.
filePromises.push(file.async('blob').then((data) => {
fileData = data;
}));
promise = Promise.all(filePromises).then(() => {
// File read and parent folder created, now write the file.
const parentFolder = this.textUtils.concatenatePaths(destination, fileDir);
return this.file.writeFile(parentFolder, fileName, fileData, {replace: true});
});
} else {
// It's a folder, create it if it doesn't exist.
promise = this.createDir(destination, name);
}
promises.push(promise.then(() => {
// File unzipped, call the progress.
loaded++;
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onProgress && onProgress({ loaded: loaded, total: total });
}));
}
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return Promise.all(promises).then(() => {
return 0;
});
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}).catch(() => {
// Error.
return -1;
});
}
}