private async Task <Message> _extractMessage(VkNet.Model.Message msg, bool extractConversation = true)
{
Conversation conversation = null;
Person person = null;
IEnumerable <Message> forwarded = null;
IEnumerable <Attachment> attachments = null;
await Task.WhenAll(
Task.Run(async() =>
{
if (extractConversation)
{
conversation = await _extractConversation(msg);
}
}),
Task.Run(async() => { person = await _extractPerson(msg); }),
Task.Run(async() =>
{
if (msg.ForwardedMessages != null && msg.ForwardedMessages.Count > 0)
{
forwarded = await Task.WhenAll(
msg.ForwardedMessages.Select(fwd => _extractMessage(fwd, false)));
}
else if (msg.ReplyMessage != null)
{
forwarded = new[] { await _extractMessage(msg.ReplyMessage, false) };
}
}),
Task.Run(() => { attachments = _extractAttachments(msg); })
);
var body = msg.Text ?? "";
return(new Message(conversation, person, body, forwarded, attachments));
}
private async Task <Person> _extractPerson(VkNet.Model.Message msg)
{
try
{
if (msg.FromId == null || msg.FromId < 1)
{
throw new Exception("Invalid user id");
}
var userId = (long)msg.FromId;
string displayName = null;
if (!DisplayNameCache.TryGetValue(userId, out displayName))
{
var users = await ApiClient.Users.GetAsync(new[] { userId });
if (users.Any())
{
displayName = $"{users.First().FirstName} {users.First().LastName}".Trim();
DisplayNameCache.Add(userId, displayName);
}
}
return(new VkPerson(this, msg.FromId.ToString(), displayName));
}
catch (Exception)
{
var id = msg.FromId?.ToString() ?? "0";
return(new VkPerson(this, id, $"[id{id}]"));
}
}
private async Task <Conversation> _extractConversation(VkNet.Model.Message msg)
{
if (msg.PeerId == null)
{
throw new NullReferenceException("Peer id can not be null");
}
var peerId = (long)msg.PeerId;
var vkConversation =
await ApiClient.Messages.GetConversationsByIdAsync(new[] { peerId }, null, null, _groupId);
var title = vkConversation.Items.Any()
? vkConversation.Items.First()?.ChatSettings?.Title ?? $"#{peerId}"
: $"#{peerId}";
return(new Conversation(this, peerId.ToString(), title));
}
private List <Attachment> _extractAttachments(VkNet.Model.Message msg)
{
if (msg.Attachments.IsNullOrEmpty() && msg.Geo == null)
{
return(null);
}
var attachments = new List <Attachment>();
foreach (var at in msg.Attachments)
{
switch (at.Instance)
{
case Photo photo:
{
var maxPhoto = photo.Sizes.MaxBy(p => p.Width).First();
attachments.Add(new PhotoAttachment(maxPhoto.Url.ToString(), photo, photo.Text,
mimeType: "image/jpeg"));
break;
}
case Video video:
attachments.Add(new LinkAttachment($"https://vk.com/video{video.OwnerId}_{video.Id}", video,
$"📹{video.Title}"));
break;
case AudioMessage audioMessage:
attachments.Add(new VoiceAttachment(audioMessage.LinkOgg.ToString(), audioMessage, fileName: null, duration: audioMessage.Duration));
break;
case Audio audio:
{
var audioName = $"{audio.Title.Replace('+', ' ')} - {audio.Artist.Replace('+', ' ')}";
attachments.Add(new LinkAttachment(
$"https://vk.com/audio?q={HttpUtility.UrlEncode(audioName)}", audio, $"🎵{audioName}"));
break;
}
case Document doc when doc.Type == DocumentTypeEnum.Gif:
attachments.Add(new AnimationAttachment(doc.Uri, doc, doc.Title, fileSize: doc.Size ?? 0));
break;
case Document doc when doc.Type == DocumentTypeEnum.Video:
attachments.Add(new VideoAttachment(doc.Uri, doc, doc.Title, fileSize: doc.Size ?? 0));
break;
case Document doc:
attachments.Add(new FileAttachment(doc.Uri, doc, doc.Title, fileSize: doc.Size));
break;
case Link link:
attachments.Add(new LinkAttachment(link.Uri.ToString(), link, $"🔗{link.Title}"));
break;
case Market market:
attachments.Add(new LinkAttachment(
$"https://vk.com/market{market.OwnerId}?w=product{market.OwnerId}_{market.Id}", market));
break;
case MarketAlbum marketAlbum:
attachments.Add(new LinkAttachment(
$"https://vk.com/market{marketAlbum.OwnerId}?section=album_{marketAlbum.Id}", marketAlbum));
break;
case Wall wall:
attachments.Add(new LinkAttachment($"https://vk.com/wall{wall.OwnerId}_{wall.Id}", wall));
break;
case Sticker sticker:
{
var maxSticker = sticker.Images.MaxBy(s => s.Width).First();
attachments.Add(new StickerAttachment(maxSticker.Url.ToString(), sticker));
break;
}
case Gift gift:
{
var giftUri = gift.Thumb256 ?? gift.Thumb96 ?? gift.Thumb48;
attachments.Add(new PhotoAttachment(giftUri.ToString(), gift, "<gift>"));
break;
}
}
}
if (msg.Geo != null)
{
attachments.Add(new PlaceAttachment(msg.Geo.Coordinates.Latitude, msg.Geo.Coordinates.Longitude,
msg.Geo.Place.Title, msg.Geo.Place.Address));
}
return(attachments);
}
