Unity to slack webhook url

Slack.cs

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using MiniJSON;

namespace AppKit
{
    public class Slack
    {
        string _webhookUrl;
        Dictionary<string,object> _defaultOption;

        float _lastSend;

        public Slack(string webhookUrl, string optionJson = null)
        {
            _webhookUrl = webhookUrl;
            if (optionJson == null)
            {
                _defaultOption = new Dictionary<string,object>();
            }
            else
            {
                _defaultOption = Json.Deserialize(optionJson) as Dictionary<string,object>;
            }
        }

        public IEnumerator Post(string message)
        {
            _lastSend = Time.realtimeSinceStartup;
            var headers = new Dictionary<string, string>();
            headers.Add("Content-Type", "application/x-www-form-urlencoded");
            var form = new WWWForm();

            if (_defaultOption.ContainsKey("text"))
            {
                _defaultOption["text"] = message;
            }
            else
            {
                _defaultOption.Add("text", message);
            }
            form.AddField("payload", Json.Serialize(_defaultOption));

            var www = new WWW(_webhookUrl, form.data, headers);
            yield return www;
            Debug.LogFormat("slack result {0}", www.text);
        }

        public float lastSend
        {
            get { return _lastSend; }
        }
    }

}

Require

MiniJson

Usage

string option = @"{
    ""username"":""user"",
    ""icon_emoji"":"":ghost:"",
    ""attachments"":[
        {
            ""color"":""#ff0000""
            ""text"":""Warning""
        }
    ]
}";
var slack = new Slack("https://hooks.slack.com/services/xxxxxxxx", option);
StartCoroutine(slack.Post("<!channel> hello"));