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 #nullable enable
  23
  24 using System;
  25 using System.Collections.Generic;
  26 using System.IO;
  27 using System.Linq;
  28 using System.Net;
  29 using System.Net.Http;
  30 using System.Text;
  31 using System.Threading;
  32 using System.Threading.Tasks;
  33 using OpenTween.Connection;
  34 using OpenTween.Models;
  35
  36 namespace OpenTween.Thumbnail.Services
  37 {
  38     /// <summary>
  39     /// 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
  40     /// </summary>
  41     class TonTwitterCom : IThumbnailService
  42     {
  43         internal static Func<IApiConnection> GetApiConnection;
  44
  45         public override Task<ThumbnailInfo?> GetThumbnailInfoAsync(string url, PostClass post, CancellationToken token)
  46         {
  47             return Task.Run<ThumbnailInfo?>(() =>
  48             {
  49                 if (GetApiConnection == null)
  50                     return null;
  51
  52                 if (!url.StartsWith(@"https://ton.twitter.com/1.1/ton/data/", StringComparison.Ordinal))
  53                     return null;
  54
  55                 return new TonTwitterCom.Thumbnail
  56                 {
  57                     MediaPageUrl = url,
  58                     ThumbnailImageUrl = url,
  59                     TooltipText = null,
  60                     FullSizeImageUrl = url,
  61                 };
  62             }, token);
  63         }
  64
  65         public class Thumbnail : ThumbnailInfo
  66         {
  67             public override Task<MemoryImage> LoadThumbnailImageAsync(HttpClient http, CancellationToken cancellationToken)
  68             {
  69                 return Task.Run(async () =>
  70                 {
  71                     var apiConnection = TonTwitterCom.GetApiConnection();
  72
  73                     using var imageStream = await apiConnection.GetStreamAsync(new Uri(this.ThumbnailImageUrl), null)
  74                         .ConfigureAwait(false);
  75
  76                     cancellationToken.ThrowIfCancellationRequested();
  77
  78                     return await MemoryImage.CopyFromStreamAsync(imageStream)
  79                         .ConfigureAwait(false);
  80                 }, cancellationToken);
  81             }
  82         }
  83     }
  84 }