The sample application to demonstrate the code in Elixir and Phoenix. KintaiViz listen to the webhook from our slack's Kintai channel and visualize them in real time.

• Elixir (>=1.7)
• PostgreSQL
• Node
• Slack App with api token. The app should enable the message and user scope.

1. Rename .env.example to .env then edit that file by adding your db username and password. You can leave the database name as is.
2. Run source .env to load the system variable.
3. Run mix deps.get
4. Run mix ecto.create
5. Run mix ecto.migrate

1. When you access the folder for the first time, run source .env to load the environment variables.
2. Run iex -S mix phx.server. This will start the server at localhost:4000

Slack sends the webhook whenever there is a new message. The webhook will arrive at /slack/webhook endpoint and will be taken care by Webhook Controller. The controller notices the Slack Supervisor to handle a message and create a user. The supervisor splits these two actions separately on different processes (as background tasks), then Webhook Controller response 200 to slack (to reply the webhook). handle_webhook will create the message on the database based on the data sent from Slack. Once it is finished, it will send the socket message message_created to the frontend through web socket connection. In the meantime, create_user sends the request to Slack API to acquire user info. Once the user info is acquired, it persists the data and send the socket message user_created to the frontend as well.