1 files changed, 45 insertions, 0 deletions
diff --git a/src/Jellyfin.Extensions/TypeExtensions.cs b/src/Jellyfin.Extensions/TypeExtensions.cs
new file mode 100644
index 000000000..5b1111d59
--- /dev/null
+++ b/src/Jellyfin.Extensions/TypeExtensions.cs
@@ -0,0 +1,45 @@
+using System;
+using System.Globalization;
+
+namespace Jellyfin.Extensions;
+
+/// <summary>
+/// Provides extensions methods for <see cref="Type" />.
+/// </summary>
+public static class TypeExtensions
+{
+    /// <summary>
+    /// Checks if the supplied value is the default or null value for that type.
+    /// </summary>
+    /// <typeparam name="T">The type of the value to compare.</typeparam>
+    /// <param name="type">The type.</param>
+    /// <param name="value">The value to check.</param>
+    /// <returns><see langword="true"/> if the value is the default for the type. Otherwise, <see langword="false"/>.</returns>
+    public static bool IsNullOrDefault<T>(this Type type, T value)
+    {
+        if (value is null)
+        {
+            return true;
+        }
+
+        object? tmp = value;
+        object? defaultValue = type.IsValueType ? Activator.CreateInstance(type) : null;
+        if (type.IsAssignableTo(typeof(IConvertible)))
+        {
+            tmp = Convert.ChangeType(value, type, CultureInfo.InvariantCulture);
+        }
+
+        return Equals(tmp, defaultValue);
+    }
+
+    /// <summary>
+    /// Checks if the object is currently a default or null value. Boxed types will be unboxed prior to comparison.
+    /// </summary>
+    /// <param name="obj">The object to check.</param>
+    /// <returns><see langword="true"/> if the value is the default for the type. Otherwise, <see langword="false"/>.</returns>
+    public static bool IsNullOrDefault(this object? obj)
+    {
+        // Unbox the type and check.
+        return obj?.GetType().IsNullOrDefault(obj) ?? true;
+    }
+}