Uwaa/Pleroma/API/PublishStatus.cs

using System.Text.Json;
using System.Text.Json.Serialization;

namespace Uwaa.Pleroma.API;

[JsonConverter(typeof(PublishStatusConverter))]
public class PublishStatus
{
    public string Content { get; set; }

    public bool Sensitive { get; set; }

    public int? ExpiresIn { get; set; } = null!;

    public string? ReplyTo { get; set; }

    public StatusVisibility Visibility { get; set; } = StatusVisibility.Public;

    /// <summary>
    /// Called after the status has been successfully published.
    /// </summary>
    [JsonIgnore]
    public Action? OnPublish;

    public PublishStatus(string content)
    {
        Content = content ?? throw new ArgumentNullException(nameof(content));
    }
}

class PublishStatusConverter : JsonConverter<PublishStatus>
{
    public sealed override bool CanConvert(Type typeToConvert) => typeToConvert == typeof(PublishStatus);

    public override PublishStatus Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
    {
        throw new NotImplementedException();
    }

    public override void Write(Utf8JsonWriter writer, PublishStatus status, JsonSerializerOptions options)
    {
        writer.WriteStartObject();

        writer.WritePropertyName("status");
        writer.WriteStringValue(status.Content);

        writer.WritePropertyName("content-type");
        writer.WriteStringValue("text/plain");

        if (status.Sensitive)
        {
            writer.WritePropertyName("sensitive");
            writer.WriteBooleanValue(true);
        }

        if (status.ExpiresIn.HasValue)
        {
            writer.WritePropertyName("expires_in");
            writer.WriteNumberValue(status.ExpiresIn.Value);
        }

        if (status.ReplyTo != null)
        {
            writer.WritePropertyName("in_reply_to_id");
            writer.WriteStringValue(status.ReplyTo);
        }

        if (status.Visibility != StatusVisibility.Public)
        {
            writer.WritePropertyName("visibility");
            writer.WriteStringValue(status.Visibility.ToString().ToLowerInvariant());
        }

        writer.WriteEndObject();
    }
}