80 lines
3.4 KiB
C#
80 lines
3.4 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Runtime.Serialization.Formatters.Binary;
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using System.Text;
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using System.Threading.Tasks;
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using VDownload.Core.Exceptions;
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using Windows.Storage;
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namespace VDownload.Core.Services
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{
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public static class SubscriptionsCollectionManagement
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{
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#region CONSTANTS
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private static readonly StorageFolder SubscriptionFolderLocation = ApplicationData.Current.LocalFolder;
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private static readonly string SubscriptionsFolderName = "Subscriptions";
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private static readonly string SubscriptionFileExtension = "vsub";
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#endregion
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#region PUBLIC METHODS
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public static async Task<(Subscription Subscription, StorageFile SubscriptionFile)[]> GetSubscriptionsAsync()
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{
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List<(Subscription Subscription, StorageFile SubscriptionFile)> subscriptions = new List<(Subscription Subscription,StorageFile SubscriptionFile)> ();
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StorageFolder subscriptionsFolder = await ApplicationData.Current.LocalFolder.CreateFolderAsync(SubscriptionsFolderName, CreationCollisionOption.OpenIfExists);
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BinaryFormatter formatter = new BinaryFormatter();
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foreach (StorageFile file in await subscriptionsFolder.GetFilesAsync())
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{
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if (file.Name.EndsWith(SubscriptionFileExtension))
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{
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Stream fileStream = await file.OpenStreamForReadAsync();
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Subscription subscription = (Subscription)formatter.Deserialize(fileStream);
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subscriptions.Add((subscription, file));
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}
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}
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return subscriptions.ToArray();
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}
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public static async Task<StorageFile> CreateSubscriptionFileAsync(Subscription subscription)
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{
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StorageFolder subscriptionsFolder = await ApplicationData.Current.LocalFolder.CreateFolderAsync(SubscriptionsFolderName, CreationCollisionOption.OpenIfExists);
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try
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{
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StorageFile subscriptionFile = await subscriptionsFolder.CreateFileAsync($"{(int)subscription.Playlist.Source}-{subscription.Playlist.ID}.{SubscriptionFileExtension}", CreationCollisionOption.FailIfExists);
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BinaryFormatter formatter = new BinaryFormatter();
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Stream subscriptionFileStream = await subscriptionFile.OpenStreamForWriteAsync();
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formatter.Serialize(subscriptionFileStream, subscription);
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return subscriptionFile;
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}
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catch (Exception ex)
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{
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if ((uint)ex.HResult == 0x800700B7)
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{
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throw new SubscriptionExistsException($"Subscription with id \"{(int)subscription.Playlist.Source}-{subscription.Playlist.ID}\" already exists");
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}
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else
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{
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throw;
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}
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}
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}
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public static async Task UpdateSubscriptionFileAsync(Subscription subscription, StorageFile subscriptionFile)
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{
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BinaryFormatter formatter = new BinaryFormatter();
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Stream subscriptionFileStream = await subscriptionFile.OpenStreamForWriteAsync();
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formatter.Serialize(subscriptionFileStream, subscription);
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}
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public static async Task DeleteSubscriptionFileAsync(StorageFile subscriptionFile) => await subscriptionFile.DeleteAsync(StorageDeleteOption.PermanentDelete);
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#endregion
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}
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}
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