Firebase integration

[illia-romanenko]

Saw a message from @kevmoo in the firebase_interop group about Firebase integration and I think it would be great to start a discussion. I think that if it's available now, we would use it today for:

1. Triggers of all sorts (DB, auth/user)
2. Cron
3. Callable/HTTP functions

[jimmyff]

Hi @illia-romanenko,
I think the majority of what you're wanting is already available:

1. Triggers of all sorts (DB, auth/user)

Event Arc + Cloud run seems to be the solution for this, although for firestore events it's bleedin-edge. See this discussion for details: #249

2. Cron

Scheduler would be the solution for this: https://cloud.google.com/scheduler/docs/creating

3. Callable/HTTP functions

I'm using Cloud Run http instances for this. My flutter app calls these rather than firestore cloud functions. The only complication is I need to authorise the Firebase authentication JWT token myself. GCP docs relating to this are here:
https://firebase.google.com/docs/auth/admin/verify-id-tokens#verify_id_tokens_using_a_third-party_jwt_library
I used the following packages: jose & x509. Jose does most of the work and has a JsonWebToken class which provides a verify method.

[ericq]

can you share where do you place the code to initialize the firebase store connection. It should be outside of the function, but where?