New: Add MediaCovers endpoint to V3 API

src/Radarr.Api.V3/MediaCovers/MediaCoverModule.cs

@@ -0,0 +1,48 @@
+using System.IO;
+using System.Text.RegularExpressions;
+using Nancy;
+using Nancy.Responses;
+using NzbDrone.Common.Disk;
+using NzbDrone.Common.EnvironmentInfo;
+using NzbDrone.Common.Extensions;
+
+namespace Radarr.Api.V3.MediaCovers
+{
+    public class MediaCoverModule : RadarrV3Module
+    {
+        private const string MEDIA_COVER_ROUTE = @"/(?<movieId>\d+)/(?<filename>(.+)\.(jpg|png|gif))";
+        private static readonly Regex RegexResizedImage = new Regex(@"-\d+\.jpg$", RegexOptions.Compiled | RegexOptions.IgnoreCase);
+
+        private readonly IAppFolderInfo _appFolderInfo;
+        private readonly IDiskProvider _diskProvider;
+
+        public MediaCoverModule(IAppFolderInfo appFolderInfo, IDiskProvider diskProvider)
+            : base("MediaCover")
+        {
+            _appFolderInfo = appFolderInfo;
+            _diskProvider = diskProvider;
+
+            Get(MEDIA_COVER_ROUTE, options => GetMediaCover(options.movieId, options.filename));
+        }
+
+        private object GetMediaCover(int movieId, string filename)
+        {
+            var filePath = Path.Combine(_appFolderInfo.GetAppDataPath(), "MediaCover", movieId.ToString(), filename);
+
+            if (!_diskProvider.FileExists(filePath) || _diskProvider.GetFileSize(filePath) == 0)
+            {
+                // Return the full sized image if someone requests a non-existing resized one.
+                // TODO: This code can be removed later once everyone had the update for a while.
+                var basefilePath = RegexResizedImage.Replace(filePath, ".jpg");
+                if (basefilePath == filePath || !_diskProvider.FileExists(basefilePath))
+                {
+                    return new NotFoundResponse();
+                }
+
+                filePath = basefilePath;
+            }
+
+            return new StreamResponse(() => File.OpenRead(filePath), MimeTypes.GetMimeType(filePath));
+        }
+    }
+}