plugin ui

NuGet/Converters/StringOrStringArrayConverter.cs

@@ -0,0 +1,48 @@
+using System.Collections.Immutable;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace NuGet.Converters;
+
+public class StringOrStringArrayConverter : JsonConverter<ImmutableArray<string>>
+{
+    public override ImmutableArray<string> Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+    {
+        switch (reader.TokenType)
+        {
+            case JsonTokenType.String:
+                return [reader.GetString()!];
+            case JsonTokenType.StartArray:
+            {
+                var builder = ImmutableArray.CreateBuilder<string>();
+                
+                while (reader.Read() && reader.TokenType != JsonTokenType.EndArray)
+                {
+                    builder.Add(reader.GetString()!);
+                }
+                
+                return builder.ToImmutable();
+            }
+            default:
+                throw new JsonException("String or array of strings expected");
+        }
+    }
+
+    public override void Write(Utf8JsonWriter writer, ImmutableArray<string> value, JsonSerializerOptions options)
+    {
+        if (value.Length == 1)
+        {
+            writer.WriteStringValue(value[0]);
+            return;
+        }
+        
+        writer.WriteStartArray();
+        
+        foreach (var author in value)
+        {
+            writer.WriteStringValue(author);
+        }
+        
+        writer.WriteEndArray();
+    }
+}