Notifier app using erlang stack(rabbit-mq, couch-db and elixir) to send push notifications through websockets(phoenix channels)
Generally other apps(or services) push a message in the notifications queue with a body {"user_id": "user_id", "message": "notification body", "title": "my notification"} and when consumed the message will be sent via websockets to the topic room:user_id where it will be broadcasted to connected sockets and saved on couchdb.
Client app that connects to the topic room:user_id and monitors the shout channel waiting for broadcasted messages.
The app also has a url to access the previous notifications stored in db in a GET method localhost:4000/api/notifications/user_id that accepts the page=integer number and/or limit=integer number to limit and filter notifications.
