Merge remote-tracking branch 'upstream/master' into output-formatters

1 files changed, 55 insertions, 0 deletions

diff --git a/MediaBrowser.Common/Json/Converters/JsonNullableInt32Converter.cs b/MediaBrowser.Common/Json/Converters/JsonNullableInt32Converter.cs
new file mode 100644
index 000000000..c1660fe76
--- /dev/null
+++ b/MediaBrowser.Common/Json/Converters/JsonNullableInt32Converter.cs
@@ -0,0 +1,55 @@
+using System;
+using System.Buffers;
+using System.Buffers.Text;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace MediaBrowser.Common.Json.Converters
+{
+    /// <summary>
+    /// Converts a nullable int32 object or value to/from JSON.
+    /// </summary>
+    public class JsonNullableInt32Converter : JsonConverter<int?>
+    {
+        /// <inheritdoc />
+        public override int? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            if (reader.TokenType == JsonTokenType.String)
+            {
+                ReadOnlySpan<byte> span = reader.HasValueSequence ? reader.ValueSequence.ToArray() : reader.ValueSpan;
+                if (Utf8Parser.TryParse(span, out int number, out int bytesConsumed) && span.Length == bytesConsumed)
+                {
+                    return number;
+                }
+
+                var stringValue = reader.GetString().AsSpan();
+
+                // value is null or empty, just return null.
+                if (stringValue.IsEmpty)
+                {
+                    return null;
+                }
+
+                if (int.TryParse(stringValue, out number))
+                {
+                    return number;
+                }
+            }
+
+            return reader.GetInt32();
+        }
+
+        /// <inheritdoc />
+        public override void Write(Utf8JsonWriter writer, int? value, JsonSerializerOptions options)
+        {
+            if (value is null)
+            {
+                writer.WriteNullValue();
+            }
+            else
+            {
+                writer.WriteNumberValue(value.Value);
+            }
+        }
+    }
+}