Presenter (Moxy) Example

EditProfilePresenter.java

@InjectViewState
public class EditProfilePresenter extends BasePresenter<EditProfileView> {

    @Inject EditProfileInteractor profileInteractor;
    private EditProfileViewModel model;

    public EditProfilePresenter() {
        App.get().getAppComponent().inject(this);
    }

    @Override protected void onFirstViewAttach() {
        super.onFirstViewAttach();

        loadViewModel();
    }

    public Subscription observeApplies(Observable<EditProfileViewModel> applies) {
        return applies.map(EditProfileViewModel::getProfile)
                .subscribe(this::updateProfile, getViewState()::showError);
    }

    public Subscription observePhotoPath(Observable<String> imageChanges) {
        return imageChanges.subscribe(this::uploadPhoto, getViewState()::showError);
    }

    private void uploadPhoto(String path) {
        addSubscription(profileInteractor.uploadPhoto(path)
                .observeOn(AndroidSchedulers.mainThread())
                .doOnSubscribe(getViewState()::showPhotoProgress)
                .doOnUnsubscribe(getViewState()::hidePhotoProgress)
                .subscribe(model::setImage, getViewState()::showError)
        );
    }

    private void updateProfile(Profile profile) {
        addSubscription(profileInteractor.updateProfile(profile)
                .observeOn(AndroidSchedulers.mainThread())
                .doOnSubscribe(subscription -> getViewState().showProgress())
                .doOnUnsubscribe(getViewState()::hideProgress)
                .subscribe(getViewState()::showUpdateComplete, getViewState()::showError)
        );
    }

    private void loadViewModel() {
        addSubscription(profileInteractor.getEditProfileViewModel()
                .observeOn(AndroidSchedulers.mainThread())
                .doOnSubscribe(getViewState()::showProgress)
                .doOnUnsubscribe(getViewState()::hideProgress)
                .subscribe(this::handleProfileModel, getViewState()::showError)
        );
    }

    private void handleProfileModel(EditProfileViewModel model) {
        this.model = model;
        getViewState().showProfile(this.model);
    }
}