Merge branch 'jellyfin:master' into master

1 files changed, 54 insertions, 0 deletions

diff --git a/MediaBrowser.Model/Extensions/EnumerableExtensions.cs b/MediaBrowser.Model/Extensions/EnumerableExtensions.cs
new file mode 100644
index 000000000..a5a6b18aa
--- /dev/null
+++ b/MediaBrowser.Model/Extensions/EnumerableExtensions.cs
@@ -0,0 +1,54 @@
+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)
+        {
+            if (string.IsNullOrWhiteSpace(requestedLanguage))
+            {
+                // Default to English if no requested language is specified.
+                requestedLanguage = "en";
+            }
+
+            var isRequestedLanguageEn = string.Equals(requestedLanguage, "en", StringComparison.OrdinalIgnoreCase);
+
+            return remoteImageInfos.OrderByDescending(i =>
+                {
+                    if (string.Equals(requestedLanguage, i.Language, StringComparison.OrdinalIgnoreCase))
+                    {
+                        return 3;
+                    }
+
+                    if (string.IsNullOrEmpty(i.Language))
+                    {
+                        // Assume empty image language is likely to be English.
+                        return isRequestedLanguageEn ? 3 : 2;
+                    }
+
+                    if (!isRequestedLanguageEn && string.Equals(i.Language, "en", StringComparison.OrdinalIgnoreCase))
+                    {
+                        // Prioritize English over non-requested languages.
+                        return 2;
+                    }
+
+                    return 0;
+                })
+                .ThenByDescending(i => i.CommunityRating ?? 0)
+                .ThenByDescending(i => i.VoteCount ?? 0);
+        }
+    }
+}