Add shared-data for things like auth

[tmartin8080]

Add shared data that will be loaded on every request for auth and other data.

https://inertiajs.com/shared-data

[tmartin8080]

@zimt28 Any suggestions on how to implement this?

[zimt28]

The only sane way I see to get something similar is a function that adds a key/value pair to conn.assigns.inertia_props or similar and InertiaPhoenix.Controller.render_inertia would merge these with regular props. This way data could be added from plugs etc.

[tmartin8080]

That makes sense, the developer will just create a custom plug. It's not much different from the way the official rails adapter handles it. Gonna try to stick to their naming of things for consistency.

[bigx333]

conn.private should be used for this I believe?:

This storage is meant to be used by libraries and frameworks to avoid writing to the user storage (the :assigns field). It is recommended for libraries/frameworks to prefix the keys with the library name.:

https://hexdocs.pm/plug/Plug.Conn.html#put_private/3

[tmartin8080]

Thanks @bigx333. Good thinking.

Let me know if anyone wants to stab at this.

[zimt28]

@bigx333 Yes, much better! Totally forgot about it :)

[zimt28]

@tmartin314 On it, will send a PR tomorrow

[tmartin8080]

@zimt28 great! I'll jump on something else

[zimt28]

The Laravel implementation uses strings as keys and even allows nesting, eg Inertia::share('auth.user', $user). I guess auth.user will then be used to create something like nested maps (or arrays in PHP?) to allow access via $page.auth.user.name.

I'd prefer atom keys over binary, but we cannot support nesting like Laravel then, which I don't see as an issue. What's your opinion on this, should we support atoms, binaries or both?

[tmartin8080]

I think we may need to support both as some data might be dynamically generated, but atoms are preferable for sure.

[tmartin8080]

@zimt28 This was added in v0.2.0

Thanks alot!
cc: @bigx333

[zimt28]

@tmartin314 Sorry for the missing PR, different time zone and I went to bed first 😄 Thanks for merging the code!