Setting response_type for Message

[rlightner]

Use case: Sending a message to a webhook, and need to specify the response_type and not channel is there a way to create a message where the content looks like this:

{
  "response_type": "in_channel",
  "blocks": [{...}]
}

[ahjephson]

If you upgrade to 1.1.2 you'll get support for deriving from SlackMessageBase and you'll be able to use your own implementation to add additional properties.

private sealed class ResponseTypeMessage : SlackMessageBase
{
    public ResponseTypeMessage(IMessageBuilderContext context, string responseType) : base(context)
    {
        ResponseType = responseType;
    }

    [JsonPropertyName("response_type")]
    public string ResponseType { get; }
}

public void CreateDerivedTypeMessage()
{
    var builder = SlackMessageBuilder.CreateMessage<ResponseTypeMessage>(c => new ResponseTypeMessage(c, "in_channel"), "*Fallback*", isMarkdown: true)
        .WithBlocks(b => b.AddHeaderBlock("Header Text"));

    var responseTypeMessage = builder.Build();

    var json = responseTypeMessage.ToJson();
}