1 files changed, 58 insertions, 0 deletions
diff --git a/src/Jellyfin.Extensions/EnumerableExtensions.cs b/src/Jellyfin.Extensions/EnumerableExtensions.cs
new file mode 100644
index 000000000..fd46358a4
--- /dev/null
+++ b/src/Jellyfin.Extensions/EnumerableExtensions.cs
@@ -0,0 +1,58 @@
+using System;
+using System.Collections.Generic;
+
+namespace Jellyfin.Extensions;
+
+/// <summary>
+/// Static extensions for the <see cref="IEnumerable{T}"/> interface.
+/// </summary>
+public static class EnumerableExtensions
+{
+    /// <summary>
+    /// Determines whether the value is contained in the source collection.
+    /// </summary>
+    /// <param name="source">An instance of the <see cref="IEnumerable{String}"/> interface.</param>
+    /// <param name="value">The value to look for in the collection.</param>
+    /// <param name="stringComparison">The string comparison.</param>
+    /// <returns>A value indicating whether the value is contained in the collection.</returns>
+    /// <exception cref="ArgumentNullException">The source is null.</exception>
+    public static bool Contains(this IEnumerable<string> source, ReadOnlySpan<char> value, StringComparison stringComparison)
+    {
+        ArgumentNullException.ThrowIfNull(source);
+
+        if (source is IList<string> list)
+        {
+            int len = list.Count;
+            for (int i = 0; i < len; i++)
+            {
+                if (value.Equals(list[i], stringComparison))
+                {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        foreach (string element in source)
+        {
+            if (value.Equals(element, stringComparison))
+            {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /// <summary>
+    /// Gets an IEnumerable from a single item.
+    /// </summary>
+    /// <param name="item">The item to return.</param>
+    /// <typeparam name="T">The type of item.</typeparam>
+    /// <returns>The IEnumerable{T}.</returns>
+    public static IEnumerable<T> SingleItemAsEnumerable<T>(this T item)
+    {
+        yield return item;
+    }
+}