[WIP] Added pub sub message converter

[mozts2005]

adding message converter to move all json parsing in to one location

[mozts2005]

@csharpfritz I would like to add unit tests for the converter. Can you please provide examples of real messages for each type?

[csharpfritz]

Twitch's docs are originally at: https://dev.twitch.tv/docs/pubsub

The notifications arrive as messages in the following format, where the notification is stringified JSON:

{
  "type": "MESSAGE",
  "data": {
     "topic": "channel-bits-events-v2.46024993",
     "message": "{\"data\":{\"user_name\":\"jwp\",\"channel_name\":\"bontakun\",\"user_id\":\"95546976\",\"channel_id\":\"46024993\",\"time\":\"2017-02-09T13:23:58.168Z\",\"chat_message\":\"cheer10000 New badge hype!\",\"bits_used\":10000,\"total_bits_used\":25000,\"context\":\"cheer\",\"badge_entitlement\":{\"new_version\":25000,\"previous_version\":10000}},\"version\":\"1.0\",\"message_type\":\"bits_event\",\"message_id\":\"8145728a4-35f0-4cf7-9dc0-f2ef24de1eb6\",\"is_anonymous\":true}"
  }
}

The ChannelPointsRedemption message is defined as:

{
"type": "reward-redeemed",
"data": {
  "timestamp": "2019-11-12T01:29:34.98329743Z",
  "redemption": {
    "id": "9203c6f0-51b6-4d1d-a9ae-8eafdb0d6d47",
    "user": {
      "id": "30515034",
      "login": "davethecust",
      "display_name": "davethecust"
    },
    "channel_id": "30515034",
    "redeemed_at": "2019-12-11T18:52:53.128421623Z",
    "reward": {
      "id": "6ef17bb2-e5ae-432e-8b3f-5ac4dd774668",
      "channel_id": "30515034",
      "title": "hit a gleesh walk on stream",
      "prompt": "cleanside's finest \n",
      "cost": 10,
      "is_user_input_required": true,
      "is_sub_only": false,
      "image": {
        "url_1x": "https://static-cdn.jtvnw.net/custom-reward-images/30515034/6ef17bb2-e5ae-432e-8b3f-5ac4dd774668/7bcd9ca8-da17-42c9-800a-2f08832e5d4b/custom-1.png",
        "url_2x": "https://static-cdn.jtvnw.net/custom-reward-images/30515034/6ef17bb2-e5ae-432e-8b3f-5ac4dd774668/7bcd9ca8-da17-42c9-800a-2f08832e5d4b/custom-2.png",
        "url_4x": "https://static-cdn.jtvnw.net/custom-reward-images/30515034/6ef17bb2-e5ae-432e-8b3f-5ac4dd774668/7bcd9ca8-da17-42c9-800a-2f08832e5d4b/custom-4.png"
      },
      "default_image": {
        "url_1x": "https://static-cdn.jtvnw.net/custom-reward-images/default-1.png",
        "url_2x": "https://static-cdn.jtvnw.net/custom-reward-images/default-2.png",
        "url_4x": "https://static-cdn.jtvnw.net/custom-reward-images/default-4.png"
      },
      "background_color": "#00C7AC",
      "is_enabled": true,
      "is_paused": false,
      "is_in_stock": true,
      "max_per_stream": { "is_enabled": false, "max_per_stream": 0 },
      "should_redemptions_skip_request_queue": true
    },
    "user_input": "yeooo",
    "status": "FULFILLED"
    }
  }
}

[mozts2005]

I have looked at the Docs but your original code does not match the examples. I was hoping to get some samples based on your channel.