/// <summary>
/// Returns an URL to entry thumbnail image.
/// Currently only used for album and artist main images.
///
/// Gets the URL to the static images folder on disk if possible,
/// otherwise gets the image from the DB.
/// </summary>
/// <param name="urlHelper">URL helper. Cannot be null.</param>
/// <param name="imageInfo">Image information. Cannot be null.</param>
/// <param name="size">Requested image size.</param>
/// <param name="fullUrl">
/// Whether the URL should always include the hostname and application path root.
/// If this is false (default), the URL maybe either full (such as http://vocadb.net/Album/CoverPicture/123)
/// or relative (such as /Album/CoverPicture/123).
/// Usually this should be set to true if the image is to be referred from another domain.
/// </param>
/// <returns>URL to the image thumbnail.</returns>
public static string ImageThumb(this UrlHelper urlHelper, IEntryImageInformation imageInfo, ImageSize size, bool fullUrl = false)
{
if (imageInfo == null)
{
return(null);
}
var shouldExist = ShouldExist(imageInfo);
string dynamicUrl = null;
// Use MVC dynamic actions (instead of static file) when requesting original or an image that doesn't exist on disk.
if (imageInfo.EntryType == EntryType.Album)
{
if (size == ImageSize.Original)
{
dynamicUrl = urlHelper.Action("CoverPicture", "Album", new { id = imageInfo.Id, v = imageInfo.Version });
}
else if (shouldExist && !imagePersister.HasImage(imageInfo, size))
{
dynamicUrl = urlHelper.Action("CoverPictureThumb", "Album", new { id = imageInfo.Id, v = imageInfo.Version });
}
}
else if (imageInfo.EntryType == EntryType.Artist)
{
if (size == ImageSize.Original)
{
dynamicUrl = urlHelper.Action("Picture", "Artist", new { id = imageInfo.Id, v = imageInfo.Version });
}
else if (shouldExist && !imagePersister.HasImage(imageInfo, size))
{
dynamicUrl = urlHelper.Action("PictureThumb", "Artist", new { id = imageInfo.Id, v = imageInfo.Version });
}
}
var ssl = WebHelper.IsSSL(HttpContext.Current.Request);
if (dynamicUrl != null)
{
return(fullUrl ? VocaUriBuilder.Absolute(dynamicUrl, ssl) : dynamicUrl);
}
if (!shouldExist)
{
var unknown = GetUnknownImageUrl(urlHelper, imageInfo);
return(fullUrl ? VocaUriBuilder.Absolute(unknown, ssl) : unknown);
}
// For all other cases use the static file
return(imagePersister.GetUrlAbsolute(imageInfo, size, ssl));
}
public EntryForPictureDisplayContract GetCoverPictureThumb(int albumId)
{
var size = new Size(ImageHelper.DefaultThumbSize, ImageHelper.DefaultThumbSize);
return(repository.HandleQuery(ctx => {
var album = ctx.Load(albumId);
if (album.CoverPictureData == null || string.IsNullOrEmpty(album.CoverPictureMime) || album.CoverPictureData.HasThumb(size))
{
return EntryForPictureDisplayContract.Create(album, PermissionContext.LanguagePreference, size);
}
var data = new EntryThumb(album, album.CoverPictureMime);
if (imagePersister.HasImage(data, ImageSize.Thumb))
{
using (var stream = imagePersister.GetReadStream(data, ImageSize.Thumb)) {
var bytes = StreamHelper.ReadStream(stream);
return EntryForPictureDisplayContract.Create(album, data.Mime, bytes, PermissionContext.LanguagePreference);
}
}
return EntryForPictureDisplayContract.Create(album, PermissionContext.LanguagePreference, size);
}));
}
public EntryForPictureDisplayContract GetCoverPictureThumb(int albumId)
{
var size = ImageSize.Thumb;
// TODO: this all should be moved to DynamicImageUrlFactory
return(repository.HandleQuery(ctx => {
var album = ctx.Load(albumId);
// If there is no picture, return empty.
if (album.CoverPictureData == null || string.IsNullOrEmpty(album.CoverPictureMime))
{
return EntryForPictureDisplayContract.Create(album, PermissionContext.LanguagePreference);
}
// Try to read thumbnail from file system.
var data = album.Thumb;
if (imagePersister.HasImage(data, size))
{
var bytes = imagePersister.ReadBytes(data, size);
return EntryForPictureDisplayContract.Create(album, data.Mime, bytes, PermissionContext.LanguagePreference);
}
// This should return the original image.
return EntryForPictureDisplayContract.Create(album, PermissionContext.LanguagePreference);
}));
}
public EntryForPictureDisplayContract GetPictureThumb(int artistId)
{
var size = ImageSize.Thumb;
return(repository.HandleQuery(ctx => {
var artist = ctx.Load(artistId);
if (artist.Picture == null || string.IsNullOrEmpty(artist.PictureMime))
{
return EntryForPictureDisplayContract.Create(artist, PermissionContext.LanguagePreference);
}
var data = artist.Thumb;
if (imagePersister.HasImage(data, size))
{
var bytes = imagePersister.ReadBytes(data, size);
return EntryForPictureDisplayContract.Create(artist, data.Mime, bytes, PermissionContext.LanguagePreference);
}
return EntryForPictureDisplayContract.Create(artist, PermissionContext.LanguagePreference);
}));
}