Advanced TypeScript Programming Projects

Getting the messages

For both the general and the secret messages pages, we are going to be getting the same data. We are going to use RxJS to create an observable that wraps getting a single message back from the server as well as getting all currently sent messages back from the server.

Depending on the room string that's passed in, the GetMessages method joins either a secret room, just for logged in users, or the general room, available to all users. Having joined the room, we return an Observable instance where, on a particular event, we react. In the case of receiving the single message, we call the Observable instance's next method. This will be subscribed to by the client component, which will write this out. Similarly, we also subscribe ...