Migrate the TMDb providers to the TMDbLib library

MediaBrowser.Model/Extensions/EnumerableExtensions.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using MediaBrowser.Model.Providers;
+
+namespace MediaBrowser.Model.Extensions
+{
+    /// <summary>
+    /// Extension methods for <see cref="IEnumerable{T}"/>.
+    /// </summary>
+    public static class EnumerableExtensions
+    {
+        /// <summary>
+        /// Orders <see cref="RemoteImageInfo"/> by requested language in descending order, prioritizing "en" over other non-matches.
+        /// </summary>
+        /// <param name="remoteImageInfos">The remote image infos.</param>
+        /// <param name="requestedLanguage">The requested language for the images.</param>
+        /// <returns>The ordered remote image infos.</returns>
+        public static IEnumerable<RemoteImageInfo> OrderByLanguageDescending(this IEnumerable<RemoteImageInfo> remoteImageInfos, string requestedLanguage)
+        {
+            var isRequestedLanguageEn = string.Equals(requestedLanguage, "en", StringComparison.OrdinalIgnoreCase);
+
+            return remoteImageInfos.OrderByDescending(i =>
+                {
+                    if (string.Equals(requestedLanguage, i.Language, StringComparison.OrdinalIgnoreCase))
+                    {
+                        return 3;
+                    }
+
+                    if (!isRequestedLanguageEn && string.Equals("en", i.Language, StringComparison.OrdinalIgnoreCase))
+                    {
+                        return 2;
+                    }
+
+                    if (string.IsNullOrEmpty(i.Language))
+                    {
+                        return isRequestedLanguageEn ? 3 : 2;
+                    }
+
+                    return 0;
+                })
+                .ThenByDescending(i => i.CommunityRating ?? 0)
+                .ThenByDescending(i => i.VoteCount ?? 0);
+        }
+    }
+}