Initial commit

Jellyfin.Plugin.AccurateRatings/AccurateRatingsProvider.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Controller.Entities.TV;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Controller.Providers;
+
+namespace Jellyfin.Plugin.AccurateRatings
+{
+    public class AccurateRatingsProvider : ICustomMetadataProvider<Episode>
+    {
+        /// <inheritdoc/>
+        public string Name => "AccurateRatingsProvider";
+
+        public Task<ItemUpdateType> FetchAsync(Episode item, MetadataRefreshOptions options, CancellationToken cancellationToken)
+        {
+            if (item.CommunityRating.HasValue)
+            {
+                decimal officialRating = (decimal)item.CommunityRating.Value;
+                item.CommunityRating = (float)ConvertToAccurateRatings(officialRating);
+            }
+
+            return Task.FromResult<ItemUpdateType>(ItemUpdateType.MetadataImport);
+        }
+
+        public decimal ConvertToAccurateRatings(decimal imdbRating)
+        {
+            decimal rating = imdbRating;
+
+            if (rating >= 5.0m && rating <= 9.4m)
+            {
+                return rating - 5.0m;
+            }
+
+            if (rating >= 9.5m)
+            {
+                return 5.0m;
+            }
+
+            return 0.0m;
+        }
+    }
+}