Merge pull request #4217 from crobibero/json-nullable-struct-converter

Properly handle null structs in json

1 files changed, 27 insertions, 0 deletions

diff --git a/MediaBrowser.Common/Json/Converters/JsonNullableStructConverterFactory.cs b/MediaBrowser.Common/Json/Converters/JsonNullableStructConverterFactory.cs
new file mode 100644
index 000000000..d5b54e3ca
--- /dev/null
+++ b/MediaBrowser.Common/Json/Converters/JsonNullableStructConverterFactory.cs
@@ -0,0 +1,27 @@
+using System;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace MediaBrowser.Common.Json.Converters
+{
+    /// <summary>
+    /// Json nullable struct converter factory.
+    /// </summary>
+    public class JsonNullableStructConverterFactory : JsonConverterFactory
+    {
+        /// <inheritdoc />
+        public override bool CanConvert(Type typeToConvert)
+        {
+            return typeToConvert.IsGenericType
+                   && typeToConvert.GetGenericTypeDefinition() == typeof(Nullable<>)
+                   && typeToConvert.GenericTypeArguments[0].IsValueType;
+        }
+
+        /// <inheritdoc />
+        public override JsonConverter CreateConverter(Type typeToConvert, JsonSerializerOptions options)
+        {
+            var structType = typeToConvert.GenericTypeArguments[0];
+            return (JsonConverter)Activator.CreateInstance(typeof(JsonNullableStructConverter<>).MakeGenericType(structType));
+        }
+    }
+}
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