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GalleryPresenter.java
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GalleryPresenter.java
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package pl.fzymek.simplegallery.gallery;
import net.grandcentrix.thirtyinch.TiConfiguration;
import net.grandcentrix.thirtyinch.TiPresenter;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import pl.fzymek.gettyimagesmodel.gettyimages.GettySearchResult;
import pl.fzymek.gettyimagesmodel.gettyimages.Image;
import pl.fzymek.simplegallery.config.Config;
import pl.fzymek.simplegallery.network.GettyImagesService;
import retrofit2.Retrofit;
import retrofit2.adapter.rxjava.RxJavaCallAdapterFactory;
import retrofit2.converter.gson.GsonConverterFactory;
import rx.Subscription;
import rx.android.schedulers.AndroidSchedulers;
import rx.schedulers.Schedulers;
import timber.log.Timber;
class GalleryPresenter extends TiPresenter<GalleryView> {
private final static TiConfiguration PRESENTER_CONFIGURATION = new TiConfiguration.Builder()
.setRetainPresenterEnabled(true)
.build();
private Subscription mRefreshSubscription;
private GettyImagesService service;
private GettySearchResult result;
private Throwable error;
private boolean loading = false;
GalleryPresenter() {
super(PRESENTER_CONFIGURATION);
Retrofit retrofit = new Retrofit.Builder()
.addCallAdapterFactory(RxJavaCallAdapterFactory.create())
.addConverterFactory(GsonConverterFactory.create())
.baseUrl(Config.GETTYIMAGES_API_URL)
.build();
service = retrofit.create(GettyImagesService.class);
}
public void onRefresh() {
String phrase = Config.QUERIES[new Random().nextInt(Config.QUERIES.length)];
loadData(phrase);
}
@Override
protected void onCreate() {
super.onCreate();
Timber.d("onCreate");
String phrase = Config.QUERIES[new Random().nextInt(Config.QUERIES.length)];
loadData(phrase);
}
@Override
protected void onDestroy() {
super.onDestroy();
Timber.d("onDestroy");
cancelRequest();
}
@Override
protected void onSleep() {
super.onSleep();
Timber.d("onSleep");
}
@Override
protected void onWakeUp() {
super.onWakeUp();
Timber.d("onWakeUp");
updateView();
}
public void loadData(String phrase) {
Timber.d("loadData() called with: phrase = [" + phrase + "]");
cancelRequest();
clearData();
mRefreshSubscription = service.getImages(phrase)
.subscribeOn(Schedulers.newThread())
.observeOn(AndroidSchedulers.mainThread())
.doOnSubscribe(() -> setLoading(true))
.doAfterTerminate(() -> {
setLoading(false);
updateView();
})
.subscribe(
result -> {
GalleryPresenter.this.result = result;
Timber.d("loaded images: " + result.getImages().size());
},
error -> {
GalleryPresenter.this.error = error;
Timber.d("got error: " + error);
}
);
}
private void updateView() {
final GalleryView view = getView();
if (view == null) {
Timber.d("not updating view. view == null");
return;
}
Timber.d("updateView");
view.showError(error);
view.showLoadingIndicator(loading);
List<Image> images = new ArrayList<>();
if (result != null) {
images = result.getImages();
}
view.showGallery(images);
}
private void clearData() {
Timber.d("clear data");
result = null;
error = null;
updateView();
}
private void setLoading(boolean loading) {
this.loading = loading;
updateView();
}
private void cancelRequest() {
if (mRefreshSubscription != null && !mRefreshSubscription.isUnsubscribed()) {
mRefreshSubscription.unsubscribe();
}
}
}