Simplify and explain login flow

[cypress[bot]]

group-income    Run #3100

Run Properties:   Passed #3100  •  0cdc4d2044 ℹ️: Merge 20f94273df2b9e72cdc2d8ac544ad4f0d57a3596 into e341e652a02766143f1a084f3547...

Project	group-income
Branch Review	2271-simplify-login-flow
Run status	Passed #3100
Run duration	09m 36s
Commit	0cdc4d2044 ℹ️: Merge 20f94273df2b9e72cdc2d8ac544ad4f0d57a3596 into e341e652a02766143f1a084f3547...
Committer	Ricardo Iván Vieitez Parra
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Failures	0
Flaky	0
Pending	10
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Passing	111
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[corrideat]

Question: is this PR finished or is there more work to do?

As mentioned on Slack, the only thing missing (other than feedback) is completing the LOGIN_FLOW.md file.

I ask because as far as the jumping around between events related to login that happens when following the logic of actions/identity.js and app/identity.js, that seems unchained. Is there no way to simplify that part / make it clearer?

I'm going to assume you mean unchanged other than unchained. Even then, I'm still unsure what you're asking specifically.

If you're talking about where the event listeners are defined, they are in those files as per your request when those event listeners were defined. There's no particular reason why they couldn't be in a different location.

If you're talking about the events themselves, that's the result of the service worker and the app being different contexts entirely and of both needing to know about the currently logged in user.

[taoeffect]

I'm going to assume you mean unchanged other than unchained.

Yes, that was a typo.

This PR does a great job of simplifying main.js. As-is, it's an improvement over what we have.

What I'm wondering is, is it possible in any way at all, to simplify the logic that's inside of gi.app/identity/login and gi.actions/identity/login (and related code)? Is this something you can take a closer look at? If nothing can be done to simplify it, then I suppose we'll have to live with it as-is, but if something can be done to simplify it, it would be awesome and also this would probably be the time to do it.

[corrideat]

gi.app/identity/login and gi.actions/identity/login

I've taken a look and it looks pretty simple to me already (both about 100 lines with relatively straightforward logic). I'll add some brief additional comments to the uncommented sections.

[corrideat]

I consider this PR complete now unless there are additional requests. I highly recommend taking the time to read through LOGIN_FLOW.md. It's an extensive file that presents in detail the motivations behind everything, documents where things happen and why and walks though specific scenarios.

[corrideat]

Thanks! Updated as requested.