public TweetMediaViewModel(IMediaEntity model)
{
this.id = model.Id.Value;
this.type = model.VideoDetails == null ? TweetMediaType.Image : TweetMediaType.Video;
if (this.type == TweetMediaType.Video)
{
// Video support has been elided in the view layer for these reasons:
//
// 1. Amazingly, WPF's MediaElement does not support HTTPS.
// See https://connect.microsoft.com/VisualStudio/feedback/details/934355/in-a-wpf-standalone-application-exe-when-the-source-of-a-mediaelement-is-set-to-a-https-uri-it-throws-a-nullreferenceexception.
// 2. Changing the URI to HTTP does not help. The MediaElement fails to load the video, giving an obscure "Exception from HRESULT: 0xC00D11B1".
// Presumably this is because the HTTPS redirects to HTTP, since the videos play fine in Windows Media Player.
// 3. I considered dropping in https://github.com/unosquare/ffmediaelement as an alternative to MediaElement.
// However, the licensing situation is unclear and there were too many bugs related to disposal/memory management.
//
// That said, I have included all the data you need here and left stub code in TweetView.xaml.cs. Feel free to drop in the above control to get videos working.
this.uri = new Uri(model.VideoDetails.Variants[0].URL);
this.aspectRatio = model.VideoDetails.AspectRatio[0] / model.VideoDetails.AspectRatio[1];
}
else
{
this.uri = new Uri(model.MediaURLHttps);
var size = model.Sizes["large"];
this.aspectRatio = size.Width ?? 1d / size.Height ?? 1d;
}
}
private static Option <IMedia> GetVideo(IMediaEntity media, string thumbnailUrl)
{
IVideoInformationEntity videoInfo = media.VideoDetails;
IVideoEntityVariant[] variants = videoInfo.Variants;
IVideoEntityVariant bestVideo = variants.OrderByDescending(variant => variant.Bitrate)
.FirstOrDefault();
Dictionary <string, IMediaEntitySize> sizes = media.Sizes;
IMediaEntitySize size = sizes.GetValueOrDefault("large")
?? sizes.GetValueOrDefault("medium")
?? sizes.GetValueOrDefault("small");
if (bestVideo != null)
{
return(Option.Some <IMedia>(
new Video(
bestVideo.URL,
thumbnailUrl,
TimeSpan.FromMilliseconds(videoInfo.DurationInMilliseconds),
size?.Width,
size?.Height)));
}
return(Option.None <IMedia>());
}
private string GetMediaUrl(IMediaEntity media)
{
switch (media.MediaType)
{
case "photo": return(media.MediaURLHttps);
case "animated_gif": return(media.VideoDetails.Variants[0].URL);
case "video": return(media.VideoDetails.Variants.OrderByDescending(x => x.Bitrate).First().URL);
default: return(null);
}
}
public bool Equals(IMediaEntity other)
{
if (Id == null || Id != other.Id)
{
return false;
}
if (Indices == null || other.Indices == null)
{
return Indices == other.Indices;
}
return Indices.ContainsSameObjectsAs(other.Indices, true);
}
public bool Equals(IMediaEntity other)
{
if (Id == null || other == null || Id != other.Id)
{
return(false);
}
if (Indices == null || other.Indices == null)
{
return(Indices == other.Indices);
}
return(Indices.ContainsSameObjectsAs(other.Indices, true));
}
private static MessageAttachment ConvertToMessageAttachment(IMediaEntity media)
{
var messageAttachment = new MessageAttachment {
};
MessageAttachmentType type = MessageAttachmentType.File;
if (media.MediaType == "animated_gif")
{
type = MessageAttachmentType.AnimatedImage;
}
if (media.MediaType == "photo")
{
type = MessageAttachmentType.Image;
}
if (media.MediaType == "vedio" || media.MediaType == "video")
{
type = MessageAttachmentType.Video;
}
messageAttachment = new MessageAttachment
{
Type = type,
Url = media.MediaURL,
PreviewUrl = media.MediaURL,
MimeType = new Uri(media.MediaURL).GetMimeType(),
OriginalId = media.IdStr,
OriginalLink = media.URL
};
if (media.VideoDetails != null && media.VideoDetails.Variants.Any())
{
var video = media.VideoDetails.Variants.FirstOrDefault(t => t.Bitrate > 0);
if (video == null)
{
video = media.VideoDetails.Variants.FirstOrDefault();
}
messageAttachment = new MessageAttachment
{
Type = type,
Url = video.URL,
PreviewUrl = media.MediaURL,
MimeType = video.ContentType,
OriginalId = media.IdStr,
OriginalLink = media.URL
};
}
NormarlizeAttachmentType(messageAttachment);
return(messageAttachment);
}
public static MediaDetails From(ITweet tweet, IMediaEntity media, int index)
{
return(new MediaDetails
{
Created = tweet.CreatedAt.DateTime,
Username = tweet.CreatedBy.ScreenName,
UserId = tweet.CreatedBy.Id,
TweetId = tweet.Id,
MediaId = media.Id.GetValueOrDefault(),
MediaIndex = index,
MediaUrl = media.MediaURLHttps,
TweetUrl = tweet.Url,
TweetText = tweet.FullText
});
}
private static string DownloadMedia(IMediaEntity media, string name)
{
using (var client = new WebClient())
{
var ext = Path.GetExtension(media.MediaURLHttps);
var date = DateTime.Now;
var path = Path.Combine(AppContext.BaseDirectory, "images", name, $"IMG_{name}_{date:dd_MM_yyyy_HH-mm-ss}--{RandomString(5)}{ext}");
if (ext == ".jpg" ||
ext == ".png" ||
ext == ".bmp")
{
if (!Directory.Exists(Path.Combine(AppContext.BaseDirectory, "images", name)))
{
Directory.CreateDirectory(Path.Combine(AppContext.BaseDirectory, "images", name));
}
client.DownloadFile(new Uri(media.MediaURLHttps), path);
return(path);
}
return(null);
}
}
private void ProcessTweet(ITweet tw)
{
Console.WriteLine("A tweet has been found");
if (tw.RetweetedTweet != null)
{
tw = tw.RetweetedTweet;
Console.WriteLine("Extracting main Tweet rather than RT");
}
Console.WriteLine("The tweet is " + tw.FullText);
List <IMediaEntity> Medias = tw.Media;
if (Medias != null && Medias.Count > 0)
{
Application.Current.Dispatcher.Invoke(delegate
{
IMediaEntity m = Medias[random.Next(Medias.Count)];
if (m.MediaURL.Contains(".jpg"))
{
TextURL = tw.Url;
CurrentImageUrl = m.MediaURL;
if (IsShowImage)
{
ImageFromTweet = new BitmapImage(new Uri(CurrentImageUrl));
}
}
});
if (!Mongo_isTweetSaved(tw.IdStr))
{
Mongo_SaveNewTweet(tw);
RecordQueue.Enqueue(tw);
//GCS_SaveNewTweetImage(tw);
}
}
}
public bool Equals(IMediaEntity other)
{
return Id != null && Id == other.Id;
}
public bool Equals(IMediaEntity other)
{
return(Id != null && Id == other.Id);
}
