From 6f8ccab788e85e025eaa44b67a1487bf419afb53 Mon Sep 17 00:00:00 2001
From: Bond_009 <bond.009@outlook.com>
Date: Sat, 19 Jun 2021 18:02:33 +0200
Subject: Move non-jellyfin extensions to separate project

---
 .../Json/Converters/JsonNullableStructConverter.cs | 45 ++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 src/Jellyfin.Extensions/Json/Converters/JsonNullableStructConverter.cs

(limited to 'src/Jellyfin.Extensions/Json/Converters/JsonNullableStructConverter.cs')

diff --git a/src/Jellyfin.Extensions/Json/Converters/JsonNullableStructConverter.cs b/src/Jellyfin.Extensions/Json/Converters/JsonNullableStructConverter.cs
new file mode 100644
index 0000000000..6de238b39e
--- /dev/null
+++ b/src/Jellyfin.Extensions/Json/Converters/JsonNullableStructConverter.cs
@@ -0,0 +1,45 @@
+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)
+        {
+            if (reader.TokenType == JsonTokenType.Null)
+            {
+                return null;
+            }
+
+            // Token is empty string.
+            if (reader.TokenType == JsonTokenType.String && ((reader.HasValueSequence && reader.ValueSequence.IsEmpty) || reader.ValueSpan.IsEmpty))
+            {
+                return null;
+            }
+
+            return JsonSerializer.Deserialize<TStruct>(ref reader, options);
+        }
+
+        /// <inheritdoc />
+        public override void Write(Utf8JsonWriter writer, TStruct? value, JsonSerializerOptions options)
+        {
+            if (value.HasValue)
+            {
+                JsonSerializer.Serialize(writer, value.Value, options);
+            }
+            else
+            {
+                writer.WriteNullValue();
+            }
+        }
+    }
+}
-- 
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