zoo | zuː | noun

an establishment which maintains a collection of wild animals, typically in a park or gardens, for study, conservation, or display to the public.

• a situation characterized by confusion and disorder: it's a zoo in the lobby.

The app tries to implement an as-simple-as-possible-navigation-concept in SwiftUI for iOS16 and later versions.

Navigation is a crucial part of any app and should be under control of the engineering team of the app. There are great open-source-projects out there that help with the complexity of navigating in SwiftUI, but they also add their biases, assumptions and their own complexity.

Simple things should stay simple. If you want to use a NavigationLink inside a NavigationStack the concept has to allow that and stay out of the way.

The standard navigation in SwiftUI with NavigationLink and NavigationStack assumes exaclty one action, namely navigating; taking the user from one point to another. In our sceanrio we usually want at least two actions, navigating and tracking.

In the Armstrong era we iterated on using publishers for user interactions and other events. Usually a view model defines which events are available and subscribers will take care of navigation and tracking.

SwiftUI previews are a powerful tool to develop part of the app without fully compiling it. Dependency injection is the foundation to control all external dependencies and enable setting up everything to run in SwiftUI previews.

• The current state of the project assumes knowldege of the types needed for navigation. View-A needs to know the type of destination View-B, because the view model has to append an instance of the correct type to trigger navigation.

• Views should not need to set up concrete destination views. The current implementation tries to provide views via Environment. This approach needs to be checked for its dependency-injection-compatibility.