Merge branch 'master' into comparisons

1 files changed, 33 insertions, 0 deletions

diff --git a/src/Jellyfin.Extensions/Json/Converters/JsonNullableStructConverter.cs b/src/Jellyfin.Extensions/Json/Converters/JsonNullableStructConverter.cs
new file mode 100644
index 000000000..28437023f
--- /dev/null
+++ b/src/Jellyfin.Extensions/Json/Converters/JsonNullableStructConverter.cs
@@ -0,0 +1,33 @@
+using System;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace Jellyfin.Extensions.Json.Converters
+{
+    /// <summary>
+    /// Converts a nullable struct or value to/from JSON.
+    /// Required - some clients send an empty string.
+    /// </summary>
+    /// <typeparam name="TStruct">The struct type.</typeparam>
+    public class JsonNullableStructConverter<TStruct> : JsonConverter<TStruct?>
+        where TStruct : struct
+    {
+        /// <inheritdoc />
+        public override TStruct? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            // Token is empty string.
+            if (reader.TokenType == JsonTokenType.String
+                && ((reader.HasValueSequence && reader.ValueSequence.IsEmpty)
+                    || (!reader.HasValueSequence && reader.ValueSpan.IsEmpty)))
+            {
+                return null;
+            }
+
+            return JsonSerializer.Deserialize<TStruct>(ref reader, options);
+        }
+
+        /// <inheritdoc />
+        public override void Write(Utf8JsonWriter writer, TStruct? value, JsonSerializerOptions options)
+            => JsonSerializer.Serialize(writer, value!.Value, options); // null got handled higher up the call stack
+    }
+}