/// <summary>
/// Gets the image from the cache corresponding to the given hash input string.
/// </summary>
/// <param name="uniqueKey">The unique key string of the image</param>
/// <returns>An Image object if successfull, otherwise null</returns>
public static ArtworkResult GetFromCache(string uniqueKey)
{
var result = new ArtworkResult();
// Handle null value
if (uniqueKey == null)
{
return(result);
}
// Get artwork path
var path = GetArtworkCachePath(uniqueKey);
// If file exists, try to load image
if (File.Exists(path))
{
try {
result.Artwork = Image.FromFile(path);
result.Status = ArtworkStatus.Cached;
result.DateTime = File.GetCreationTime(path);
}
catch (Exception e) {
result.Artwork = null;
result.Status = ArtworkStatus.Error;
Logger.Log(String.Format("Could not load image from {0}: {1}", path, e.Message), Logger.LogLevel.Error);
}
}
else
{
result.Status = ArtworkStatus.Unavailable;
}
// Return the image
return(result);
}
/// <summary>
/// Gets the default artwork for the given filter
/// </summary>
/// <param name="filter">The filter for which the artwork should be retrieved</param>
/// <returns>A filled ArtworkResult object</returns>
public static ArtworkResult GetFromArtworkService(Options filter)
{
var result = new ArtworkResult();
// Artist: get artist or album
if (filter.ContainsKey("artist"))
{
var artist = ((string)filter["artist"]).ToLower();
// Also album: get album
if (filter.ContainsKey("album"))
{
result = GetFromComponents <IAlbumArtworkService>(ArtworkType.Album, new object[] { artist, ((string)filter["album"]).ToLower() });
}
// Get artist
else
{
result = GetFromComponents <IArtistArtworkService>(ArtworkType.Artist, new object[] { artist });
}
}
// Set result object
if (result.Type == ArtworkType.Unknown)
{
result.Type = ArtworkHelper.GetDefaultArtworkType(filter);
}
return(result);
}
/// <summary>
/// Gets the default artwork for the given item
/// </summary>
/// <param name="item">The item for which the artwork should be retrieved</param>
/// <returns>A filled ArtworkResult object</returns>
public static ArtworkResult GetFromArtworkService(IItem item)
{
var result = new ArtworkResult();
// Track: get album artwork from services until one is found
if (item is ITrack)
{
result = GetFromComponents <IAlbumArtworkService>(ArtworkType.Album, new object[] { (ITrack)item });
}
// Set result object
if (result.Type == ArtworkType.Unknown)
{
result.Type = ArtworkHelper.GetDefaultArtworkType(item);
}
return(result);
}
/// <summary>
/// Gets artwork from the components of the given type
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="type"></param>
/// <param name="parameters"></param>
/// <returns></returns>
static ArtworkResult GetFromComponents <T>(string type, object[] parameters) where T : IArtworkService
{
// Set vars
var components = PluginManager.GetComponent <T>();
var statuses = new List <ServiceResultStatus>();
var args = new object[parameters.Length + 1];
Array.Copy(parameters, args, parameters.Length);
Image artwork = null;
var imageType = typeof(Image).AssemblyQualifiedName.Replace("System.Drawing.Image", "System.Drawing.Image&");
var types = args.Select(t => t == null ? Type.GetType(imageType) : t.GetType()).ToArray();
// Loop through plugins
foreach (var component in components)
{
// Get image from plugin
var method = component.GetType().GetMethod("Get" + type.ToCamelCase() + "Artwork", types);
if (method == null)
{
continue;
}
var status = (ServiceResultStatus)method.Invoke(component, args);
// Check for corruption
artwork = (Image)args[parameters.Length];
if (artwork != null)
{
using (var stream = new MemoryStream()) {
try {
artwork.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
}
catch (Exception) {
artwork.Dispose();
args[parameters.Length] = artwork = null;
status = ServiceResultStatus.InvalidResponse;
}
}
}
// Add status
statuses.Add(status);
// Stop if we have an image
if (artwork != null)
{
break;
}
}
// Build and return result
var result = new ArtworkResult();
result.Artwork = artwork;
result.DateTime = DateTime.Now;
if (result.Artwork != null)
{
result.Status = ArtworkStatus.Retrieved;
}
else if (statuses.All(s => s == ServiceResultStatus.NoResult))
{
result.Status = ArtworkStatus.Unavailable;
}
else
{
result.Status = ArtworkStatus.Error;
}
return(result);
}
