Foursquare Search (MVP - Model-View-Presenter)

Demo video can be checked from here: https://youtu.be/6cp580Eb908

Running the project

Before running the app, make sure to add following values to the local.properties file:

api.client=CLIENT
api.secret=SECRET
# version can be changed if needed
api.version=20180323

Technologies:

• Dagger Hilt for Dependency Injection and easy to use

• MvpPresenter: I used ViewModel as a base of MvpPresenter as it's provided by the platform and because of the Dagger Hilt support. I implemented MvpPresenter by extending ViewModel. I tried not to over-engineer the solution, that's why I think solution is maintainable with current requirements and architecture. I wrote unit tests for the complex part of SearchPresenter. Presenter directly uses injected LocationRepository and SearchVenuesUseCase. I wrote some unit tests for SearchVenuesUseCase since it has page related calculation.

• RxJava 2: To use publish-subscribe pattern and make threading easy, I used RxJava 2. Mainly used Observable and Single. Besides those, I used RxBinding and RxRelay2.

• Retrofit and Moshi: used for fetching data from API and deserializing JSON. At work I use GSON as well but I have read often that Moshi is faster than GSON, that's why, I used it. I also wrote test for FoursquareRequestInterceptorTest which adds client id, secret and API version to all requests by default.

• Utilized DiffUtil to prevent unnecessary updates in RecyclerView

• Paging 3: it was first time I used new Paging 3 library. I have used previously Paging 2 but compared to that one, it was simpler to implement pagination using Paging 3.

• Github Actions: used this for creating basic CI with validate, build and test workflows.

Some future to do:

• Unfortunately, I didn't have time to polish UI. UI definitely needs some polishing, extracting styles to make it more reusable. Also, it'd be nice to implement more explaining screen for the location permission.

• Implement offline-first approach

• Dark theme implementation

• UI tests for activity to make sure correct states are displayed

• Change logo :D

• ...