DownloadsPresenter.java

package org.bookdash.android.presentation.downloads;

import org.bookdash.android.data.book.BookService;
import org.bookdash.android.data.book.DownloadService;
import org.bookdash.android.data.tracking.Analytics;
import org.bookdash.android.domain.model.firebase.FireBookDetails;
import org.bookdash.android.presentation.base.BasePresenter;

import java.util.List;

import rx.Scheduler;
import rx.Subscriber;

class DownloadsPresenter extends BasePresenter<DownloadsContract.View> implements DownloadsContract.Presenter {
    private final BookService bookService;
    private final Scheduler ioScheduler, mainScheduler, computationScheduler;
    private final DownloadService downloadService;
    private final Analytics analytics;

    DownloadsPresenter(BookService bookService, DownloadService downloadService, Analytics analytics, Scheduler io,
                       Scheduler main, Scheduler compScheduler) {
        this.bookService = bookService;
        this.ioScheduler = io;
        this.mainScheduler = main;
        this.computationScheduler = compScheduler;
        this.downloadService = downloadService;
        this.analytics = analytics;
    }

    public void loadListDownloads() {
        getView().showLoading(true);
        addSubscription(bookService.getDownloadedBooks().subscribeOn(ioScheduler).observeOn(mainScheduler)
                .subscribe(new Subscriber<List<FireBookDetails>>() {
                    @Override
                    public void onCompleted() {

                    }

                    @Override
                    public void onError(Throwable e) {
                        getView().showErrorScreen(true, e.getMessage(), true);
                        getView().showLoading(false);
                    }

                    @Override
                    public void onNext(List<FireBookDetails> books) {
                        getView().showLoading(false);
                        if (books.isEmpty() || books.size() == 0) {
                            getView().showNoBooksDownloadedMessage();
                            return;
                        }
                        getView().showDownloadedBooks(books);
                    }
                }));

    }

    @Override
    public void deleteDownload(final FireBookDetails bookDetail) {
        getView().showLoading(true);
        addSubscription(
                downloadService.deleteDownload(bookDetail).subscribeOn(computationScheduler).observeOn(mainScheduler)
                        .subscribe(new Subscriber<Boolean>() {
                            @Override
                            public void onCompleted() {

                            }

                            @Override
                            public void onError(Throwable e) {
                                analytics.trackDeleteBookFailed(bookDetail, e.getMessage());
                                getView().showLoading(false);
                                getView().showSnackBarError(e.getMessage());
                            }

                            @Override
                            public void onNext(Boolean aBoolean) {
                                analytics.trackDeleteBook(bookDetail);
                                loadListDownloads();
                            }
                        }));

    }
}