App to detect current user of mobile device that is rented. Technologies: Kotlin coroutines, LiveData, ViewModel, Hilt, Jetpack Navigation, etc.

View layer is implemented in single activity style (MainActivity) that has a fragment view container The fragments that are inserted into container implement BaseFragment interface, which contains:

1. onSetupLayout() - for layout operations
2. onBindViewModel() - for LiveData and other bindings with VM
3. observeOperations() - for observing live events from VM - initialized once the fragment is created (otherwise caused bug with multiple observe of one event)
4. onCodeRecognized(code: String) - for futher operations with recognized rfid code. Each fragment has its own implementation of this method
5. showFloatingActionButton: Boolean - for show/hide fab with rfid dialog

Is implemented in BaseViewModel interface that has no methods. Logic is here

Domain layer is implemented in UseCases each of them contain only one remote method. There are two types of UseCases: simple UseCase (that receives no params from user) and UseCaseWithRequestedParams (waits for params from user)

Remote layer contains two sources of information: Preferences and Retrofit service Preferences is implemented in single file PreferencesStorage.kt and has simple SharedPreferences implementation Retrofit service contains factory (ApiServiceFactory.kt) implementation and ApiService.kt interface that contains all the methods

1. Implement multiple operations in one observe method