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Session.cs
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Session.cs
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// ---------------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// The MIT License (MIT)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
// ---------------------------------------------------------------------------------
using System;
using System.IO;
using System.IO.Compression;
using System.Runtime.InteropServices.WindowsRuntime;
using System.Threading.Tasks;
using Windows.Storage;
using Windows.Storage.Streams;
namespace AnnotatedAudio.Model
{
public class Session
{
public string Name { get; set; }
public Guid Id { get; set; }
public int Segments { get; set; }
public DateTime Created { get; set; }
public async Task<StorageFolder> GetFolder() => await ApplicationData.Current.LocalFolder.GetFolderAsync(Id.ToString());
public async Task CompressSession(bool deleteSourceFolder)
{
// The folder where a Session is stored.
var folder = await Windows.Storage.ApplicationData.Current.LocalFolder.GetFolderAsync(Id.ToString());
var files = await folder.GetFilesAsync();
using (var memoryStream = new MemoryStream())
{
// Create zip archive stream.
using (var archive = new ZipArchive(memoryStream, ZipArchiveMode.Create))
{
// For each file in the Session folder.
foreach (var sessionFile in files)
{
// Store the contents of the file into a byte array.
byte[] buffer = WindowsRuntimeBufferExtensions.ToArray(await FileIO.ReadBufferAsync(sessionFile));
// Create an entry in the archive.
var entry = archive.CreateEntry(sessionFile.Name);
// Open a stream to the new entry to write the buffer.
using (var entryStream = entry.Open())
{
await entryStream.WriteAsync(buffer, 0, buffer.Length);
}
}
}
// Attempt to find the zip file and delete if it exists.
var item = await ApplicationData.Current.LocalFolder.TryGetItemAsync($"{Id.ToString()}.zip");
if (item != null)
{
await item.DeleteAsync();
}
// Create the new zip file.
var file = await ApplicationData.Current.LocalFolder.CreateFileAsync($"{Id.ToString()}.zip");
using (var fileStream = await file.OpenAsync(FileAccessMode.ReadWrite))
{
// Write compressed data from memory to file
using (var zipStream = fileStream.AsStreamForWrite())
{
byte[] buffer = memoryStream.ToArray();
zipStream.Write(buffer, 0, buffer.Length);
zipStream.Flush();
}
}
}
// Delete the source folder after it's been compressed.
if (deleteSourceFolder)
{
await folder.DeleteAsync();
}
}
public async Task DecompressSession(bool deleteSourceZip)
{
var zipfile = await Windows.Storage.ApplicationData.Current.LocalFolder.GetFileAsync($"{Id.ToString()}.zip");
using (var stream = await zipfile.OpenAsync(FileAccessMode.Read))
{
using (var archive = new ZipArchive(stream.AsStreamForRead()))
{
StorageFolder extractfolder;
try
{
extractfolder = await Windows.Storage.ApplicationData.Current.LocalFolder.GetFolderAsync(Id.ToString());
}
catch (FileNotFoundException)
{
extractfolder = await Windows.Storage.ApplicationData.Current.LocalFolder.CreateFolderAsync(Id.ToString());
}
archive.ExtractToDirectory(extractfolder.Path);
}
}
// Delete the ZIP file after it's been decompressed.
if (deleteSourceZip)
{
await zipfile.DeleteAsync();
}
}
}
}