public static async Task Run(TelegramClient tg)
{
var fullUserInfo = await tg.Call(new GetFullUser(new InputUser.SelfTag()));
var userInfo = fullUserInfo.Users.Single().Default !;
var chatPeer = (InputPeer) new InputPeer.UserTag(
userId: userInfo.Id,
accessHash: userInfo.AccessHash !.Value
);
var history = await ScrapeHistoryDocuments(tg, chatPeer);
var video = history.Last(x => x.Attributes.NChoose(x => x.Video).Any());
var videoName = video.Attributes.NChoose(x => x.Filename).Single().FileName;
Console.WriteLine($"Downloading the video with name '{videoName}'.");
var videoLocation = new InputFileLocation.EncryptedTag(
id: video.Id,
accessHash: video.AccessHash
);
await using var fs = File.OpenWrite(videoName);
await tg.Upload.DownloadFile(fs, videoLocation);
Console.WriteLine("The video is downloaded.");
}
static async Task DownloadLastMovieFromSavedMessagesExample(TelegramClient tg)
{
var fullUserInfo = await tg.Call(new GetFullUser(new InputUser.SelfTag()));
var userInfo = fullUserInfo.User.AsTag().AssertSome();
var chatPeer = (InputPeer) new InputPeer.UserTag(
userId: userInfo.Id,
accessHash: userInfo.AccessHash.AssertSome()
);
const int batchLimit = 100;
async Task <IEnumerable <Document.Tag> > GetHistory(int offset = 0)
{
var resp = await tg.Call(new GetHistory(
peer : chatPeer,
addOffset : offset,
limit : batchLimit,
minId : 0,
maxId : 0,
hash : 0,
offsetDate : 0,
offsetId : 0
));
var messages = resp.AsSliceTag().AssertSome().Messages;
var docs = messages
.Reverse()
.Choose(Message.AsTag)
.Choose(message => message.Media)
.Choose(MessageMedia.AsDocumentTag)
.Choose(x => x.Document)
.Choose(Document.AsTag);
return(messages.Count == 0
? docs
: (await GetHistory(offset + batchLimit)).Concat(docs));
}
var history = await GetHistory();
var video = history.Last(x => x.Attributes.Choose(DocumentAttribute.AsVideoTag).Any());
var videoName = video.Attributes.Choose(DocumentAttribute.AsFilenameTag).Single().FileName;
var videoLocation = new InputFileLocation.EncryptedTag(
id: video.Id,
accessHash: video.AccessHash
);
using (var fs = File.OpenWrite(videoName))
{
await tg.Upload.DownloadFile(fs, videoLocation);
}
}
