From 7017f011f79cb05678a10eddf8af0e9558e3b1ed Mon Sep 17 00:00:00 2001
From: Cenngo <cenk.ergen1@gmail.com>
Date: Tue, 17 May 2022 12:54:12 +0300
Subject: [PATCH] add nullable ComponentTypeConverter and TypeReader

---
 .../NullableComponentConverter.cs             | 23 +++++++++++++++++++
 .../TypeReaders/NullableReader.cs             | 23 +++++++++++++++++++
 2 files changed, 46 insertions(+)
 create mode 100644 src/Discord.Net.Interactions/TypeConverters/ComponentInteractions/NullableComponentConverter.cs
 create mode 100644 src/Discord.Net.Interactions/TypeReaders/NullableReader.cs

diff --git a/src/Discord.Net.Interactions/TypeConverters/ComponentInteractions/NullableComponentConverter.cs b/src/Discord.Net.Interactions/TypeConverters/ComponentInteractions/NullableComponentConverter.cs
new file mode 100644
index 000000000..513e46933
--- /dev/null
+++ b/src/Discord.Net.Interactions/TypeConverters/ComponentInteractions/NullableComponentConverter.cs
@@ -0,0 +1,23 @@
+using System;
+using System.Threading.Tasks;
+
+namespace Discord.Interactions
+{
+    internal class NullableComponentConverter<T> : ComponentTypeConverter<T>
+    {
+        private readonly ComponentTypeConverter _typeConverter;
+
+        public NullableComponentConverter(InteractionService interactionService, IServiceProvider services)
+        {
+            var type = Nullable.GetUnderlyingType(typeof(T));
+
+            if (type is null)
+                throw new ArgumentException($"No type {nameof(TypeConverter)} is defined for this {type.FullName}", "type");
+
+            _typeConverter = interactionService.GetComponentTypeConverter(type, services);
+        }
+
+        public override Task<TypeConverterResult> ReadAsync(IInteractionContext context, IComponentInteractionData option, IServiceProvider services)
+            => _typeConverter.ReadAsync(context, option, services);
+    }
+}
diff --git a/src/Discord.Net.Interactions/TypeReaders/NullableReader.cs b/src/Discord.Net.Interactions/TypeReaders/NullableReader.cs
new file mode 100644
index 000000000..5d5647b53
--- /dev/null
+++ b/src/Discord.Net.Interactions/TypeReaders/NullableReader.cs
@@ -0,0 +1,23 @@
+using System;
+using System.Threading.Tasks;
+
+namespace Discord.Interactions
+{
+    internal class NullableReader<T> : TypeReader<T>
+    {
+        private readonly TypeReader _typeReader;
+
+        public NullableReader(InteractionService interactionService, IServiceProvider services)
+        {
+            var type = Nullable.GetUnderlyingType(typeof(T));
+
+            if (type is null)
+                throw new ArgumentException($"No type {nameof(TypeConverter)} is defined for this {type.FullName}", "type");
+
+            _typeReader = interactionService.GetTypeReader(type, services);
+        }
+
+        public override Task<TypeConverterResult> ReadAsync(IInteractionContext context, string option, IServiceProvider services)
+            => _typeReader.ReadAsync(context, option, services);
+    }
+}