Uwaa/Pleroma/EnumLowerCaseConverter.cs

namespace Uwaa.Pleroma;

/// <summary>
/// Converts to and from enum values in lowercase.
/// </summary>
class EnumLowerCaseConverter<T> : JsonConverter<T> where T : struct
{
    public override bool CanConvert(Type typeToConvert) => typeToConvert.IsEnum;

    public override T Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
    {
        return Enum.Parse<T>(reader.GetString() ?? throw new NullReferenceException("Expected a string, got null"), true);
    }

    public override void Write(Utf8JsonWriter writer, T value, JsonSerializerOptions options)
    {
        writer.WriteStringValue(value.ToString()?.ToLowerInvariant());
    }
}