Subscriber Worker Queue: Start Connection

[AndyTWF]

Implement the following worker in the subscriber:

• StartConnection

This worker takes a ably-provided callback that is given to subscriber.start(), this callback expects a Result with either a success or error information.

The worker first of all calls to update all trackable states.

Then, asyncronously:

• Connect to Ably
• Attach to channel
• Enter presence

If any of these steps fail, the callback function is called with a failure Result.

Finally, the worker posts SubscribeForPresenceMessages work, passing down the callback function.

This work depends on:

• https://github.com/ably/ably-asset-tracking-swift/issues/564
• https://github.com/ably/ably-asset-tracking-swift/issues/589
• https://github.com/ably/ably-asset-tracking-swift/issues/588

[sync-by-unito[bot]]

➤ Automation for Jira commented:

The link to the corresponding Jira issue is https://ably.atlassian.net/browse/SDK-3408