I'm trying to level up as a developer, and am currently building an app using RxSwift with MVVM. Most of my view models need access to the current user object. In just about every view controller, before I do anything, I have to fetch info for current user from database, and only then, can all other code be executed ( because so much of the logic depends on the state of the User). This also means most code is at least nested one level since fetching user is async. I actually input User into initializer of view model. There must be a better way to persist the current user throughout app. Ive recall reading a bit about dependency injection and how it allows data to be passed along as dependencies to other objects. Is this a scenario where injection could be a viable solution? Im open to other suggestions as well!
Potential solutions I've thought of since time of post
just pass along User through segues and assign to currentUser property in each view controller
after login, create a shared observable of type Observable<User> in RootViewController, and subscribe to it wherever need be. But i'd still have to put code into subscription block wherever i subscribe.