private async Task <Message> _extractMessage(Telegram.Bot.Types.Message tgMessage)
{
Logger.LogTrace("Message received");
var conversation = _extractConversation(tgMessage.Chat);
var person = _extractPerson(tgMessage.From);
var attachments = new List <Attachment>();
var at = await _extractAttachment(tgMessage);
if (at != null)
{
attachments.Add(at);
}
if (tgMessage.Entities != null)
{
attachments.AddRange(from entity in tgMessage.Entities
where entity.Type == MessageEntityType.TextLink
select new LinkAttachment(entity.Url));
}
// Just forwarded message
if (tgMessage.ForwardFrom != null)
{
var fwdPerson = _extractPerson(tgMessage.ForwardFrom);
var fwdMessage = new Message(conversation, fwdPerson, tgMessage.Text, attachments: attachments);
return(new Message(conversation, person, forwardedMessages: new[] { fwdMessage }));
}
// Reply to
Message[] forwarded = null;
if (tgMessage.ReplyToMessage != null)
{
forwarded = new[]
{
await _extractMessage(tgMessage.ReplyToMessage)
};
}
var text = tgMessage.Text ?? tgMessage.Caption;
// Remove bot name from command
if (!string.IsNullOrEmpty(text) && text.StartsWith("/") && !string.IsNullOrEmpty(BotUserName))
{
text = text.Split($"@{BotUserName}", 2)[0];
}
return(new Message(conversation, person, text, forwarded, attachments));
}
/**
* Extracts attachment from the message
*/
private async Task <Attachment> _extractAttachment(Telegram.Bot.Types.Message tgMessage)
{
if (tgMessage.Audio != null)
{
var file = await BotClient.GetFileAsync(tgMessage.Audio.FileId);
return(new AudioAttachment(_getDownloadUrl(file), tgMessage.Audio, tgMessage.Caption,
fileSize: file.FileSize,
mimeType: tgMessage.Audio.MimeType, title: tgMessage.Audio.Title,
performer: tgMessage.Audio.Performer,
duration: Convert.ToUInt64(tgMessage.Audio.Duration)));
}
if (tgMessage.Document != null)
{
var file = await BotClient.GetFileAsync(tgMessage.Document.FileId);
return(new FileAttachment(_getDownloadUrl(file), tgMessage.Document,
tgMessage.Caption, tgMessage.Document.FileName, file.FileSize, tgMessage.Document.MimeType));
}
if (tgMessage.Animation != null)
{
var file = await BotClient.GetFileAsync(tgMessage.Animation.FileId);
return(new AnimationAttachment(_getDownloadUrl(file), tgMessage.Animation, tgMessage.Caption,
tgMessage.Animation.FileName, file.FileSize, tgMessage.Animation.MimeType,
Convert.ToUInt64(tgMessage.Animation.Duration),
tgMessage.Animation.Width, tgMessage.Animation.Height));
}
if (tgMessage.Game != null)
{
throw new UnsupportedAttachmentException("game");
}
if (tgMessage.Photo != null)
{
var photo = tgMessage.Photo.MaxBy(ph => ph.Width).First();
var file = await BotClient.GetFileAsync(photo.FileId);
return(new PhotoAttachment(_getDownloadUrl(file), photo, tgMessage.Caption, fileSize: file.FileSize,
mimeType: MimeTypesMap.GetMimeType(file.FilePath)));
}
if (tgMessage.Sticker != null)
{
var file = await BotClient.GetFileAsync(tgMessage.Sticker.FileId);
return(new StickerAttachment(_getDownloadUrl(file), tgMessage.Sticker, fileSize: file.FileSize,
mimeType: "image/webp"));
}
if (tgMessage.Video != null)
{
var file = await BotClient.GetFileAsync(tgMessage.Video.FileId);
return(new VideoAttachment(_getDownloadUrl(file), tgMessage.Video, tgMessage.Caption,
fileSize: file.FileSize,
mimeType: tgMessage.Video.MimeType, duration: Convert.ToUInt64(tgMessage.Video.Duration),
width: tgMessage.Video.Width,
height: tgMessage.Video.Height));
}
if (tgMessage.Voice != null)
{
var file = await BotClient.GetFileAsync(tgMessage.Voice.FileId);
return(new VoiceAttachment(_getDownloadUrl(file), tgMessage.Voice, tgMessage.Caption,
fileSize: file.FileSize,
mimeType: tgMessage.Voice.MimeType, duration: Convert.ToUInt64(tgMessage.Voice.Duration)));
}
if (tgMessage.VideoNote != null)
{
// TODO: Mark video note somehow
var file = await BotClient.GetFileAsync(tgMessage.VideoNote.FileId);
return(new VideoAttachment(_getDownloadUrl(file), tgMessage.VideoNote, tgMessage.Caption,
fileSize: file.FileSize,
mimeType: "video/mp4", duration: Convert.ToUInt64(tgMessage.VideoNote.Duration),
width: tgMessage.VideoNote.Length,
height: tgMessage.VideoNote.Length));
}
if (tgMessage.Contact != null)
{
return(new ContactAttachment(tgMessage.Contact.Vcard, tgMessage.Contact));
}
if (tgMessage.Location != null)
{
return(new PlaceAttachment(tgMessage.Location.Latitude, tgMessage.Location.Longitude,
tgMessage.Location));
}
if (tgMessage.Venue != null)
{
return(new PlaceAttachment(tgMessage.Venue.Location.Latitude, tgMessage.Venue.Location.Longitude,
tgMessage.Venue.Title, tgMessage.Venue.Address, tgMessage.Venue));
}
return(null);
}
