OpenTween/Thumbnail/Services/TonTwitterCom.cs

   1 // OpenTween - Client of Twitter
   2 // Copyright (c) 2013 kim_upsilon (@kim_upsilon) <https://upsilo.net/~upsilon/>
   3 // All rights reserved.
   4 //
   5 // This file is part of OpenTween.
   6 //
   7 // This program is free software; you can redistribute it and/or modify it
   8 // under the terms of the GNU General Public License as published by the Free
   9 // Software Foundation; either version 3 of the License, or (at your option)
  10 // any later version.
  11 //
  12 // This program is distributed in the hope that it will be useful, but
  13 // WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14 // or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  15 // for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License along
  18 // with this program. If not, see <http://www.gnu.org/licenses/>, or write to
  19 // the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
  20 // Boston, MA 02110-1301, USA.
  21
  22 using System;
  23 using System.Collections.Generic;
  24 using System.IO;
  25 using System.Linq;
  26 using System.Net;
  27 using System.Net.Http;
  28 using System.Text;
  29 using System.Threading;
  30 using System.Threading.Tasks;
  31 using OpenTween.Connection;
  32 using OpenTween.Models;
  33
  34 namespace OpenTween.Thumbnail.Services
  35 {
  36     /// <summary>
  37     /// Twitter の DM に添付された画像をサムネイル表示するためのクラス
  38     /// </summary>
  39     class TonTwitterCom : IThumbnailService
  40     {
  41         internal static Func<IApiConnection> GetApiConnection;
  42
  43         public override Task<ThumbnailInfo> GetThumbnailInfoAsync(string url, PostClass post, CancellationToken token)
  44         {
  45             return Task.Run<ThumbnailInfo>(() =>
  46             {
  47                 if (GetApiConnection == null)
  48                     return null;
  49
  50                 if (!url.StartsWith(@"https://ton.twitter.com/1.1/ton/data/", StringComparison.Ordinal))
  51                     return null;
  52
  53                 return new TonTwitterCom.Thumbnail
  54                 {
  55                     MediaPageUrl = url,
  56                     ThumbnailImageUrl = url,
  57                     TooltipText = null,
  58                     FullSizeImageUrl = url,
  59                 };
  60             }, token);
  61         }
  62
  63         public class Thumbnail : ThumbnailInfo
  64         {
  65             public override Task<MemoryImage> LoadThumbnailImageAsync(HttpClient http, CancellationToken cancellationToken)
  66             {
  67                 return Task.Run(async () =>
  68                 {
  69                     var apiConnection = TonTwitterCom.GetApiConnection();
  70
  71                     using var imageStream = await apiConnection.GetStreamAsync(new Uri(this.ThumbnailImageUrl), null)
  72                         .ConfigureAwait(false);
  73
  74                     cancellationToken.ThrowIfCancellationRequested();
  75
  76                     return await MemoryImage.CopyFromStreamAsync(imageStream)
  77                         .ConfigureAwait(false);
  78                 }, cancellationToken);
  79             }
  80         }
  81     }
  82 }