Health Reads

Simple app that lets you browse Health books available via NYTimes API.

Running the sample

Define NYT_API_KEY in ~/.gradle/gradle.properties or in your project root in order to run the app. You can get your own API key here.

Offline mode with local persistence using Room is implemented. Pull-to-refresh by user initiates data refresh from the network and updating local cache.
Current implementation does not paginate results. If I was making a production version, I'd probably go with Jetpack Paging library with BoundaryCallbacks.
I am using Retrofit and its suspend implementation already uses Dispatchers.IO under the hood. Therefore, I am not explicitly switching to background thread anywhere in the app. I would do that if there was a resource-intensive operation or some additional network calls outside of Retrofit.
Originally, both ViewModels in the app used MutableStateFlow for the view to observe. I ran into some issues unit-testing this implementation, so I made one ViewModel being unit-tested use LiveData in the meantime.
I tried handling process death for the BookDetailViewModel but ran into issues getting it to work despite the fact that Koin is supposed to support SavedStateHandle in ViewModels now.
The return type of BookRepository#fetchBook(isbn: String) could be Result<Book> but kotlin Result is not supported in function return types yet so I wrapped it in Flow (even thought it's effectively a one-shot operation, not a stream).