Initial download queue fragment. Update progress working

2015-11-04 18:54:07 +01:00
parent 3b9f4cb6f1
commit 999cc0df6e
15 changed files with 374 additions and 27 deletions
@@ -0,0 +1,107 @@
+package eu.kanade.mangafeed.presenter;
+
+import android.os.Bundle;
+
+import java.util.HashMap;
+import java.util.concurrent.TimeUnit;
+
+import javax.inject.Inject;
+
+import eu.kanade.mangafeed.data.helpers.DownloadManager;
+import eu.kanade.mangafeed.data.models.Download;
+import eu.kanade.mangafeed.data.models.DownloadQueue;
+import eu.kanade.mangafeed.data.models.Page;
+import eu.kanade.mangafeed.ui.fragment.DownloadQueueFragment;
+import rx.Observable;
+import rx.Subscription;
+import rx.android.schedulers.AndroidSchedulers;
+import rx.schedulers.Schedulers;
+import timber.log.Timber;
+
+public class DownloadQueuePresenter extends BasePresenter<DownloadQueueFragment> {
+
+    @Inject DownloadManager downloadManager;
+
+    private DownloadQueue downloadQueue;
+    private Subscription statusSubscription;
+    private HashMap<Download, Subscription> progressSubscriptions;
+
+    public final static int GET_DOWNLOAD_QUEUE = 1;
+
+    @Override
+    protected void onCreate(Bundle savedState) {
+        super.onCreate(savedState);
+
+        downloadQueue = downloadManager.getQueue();
+        progressSubscriptions = new HashMap<>();
+
+        restartableLatestCache(GET_DOWNLOAD_QUEUE,
+                () -> Observable.just(downloadQueue.get()),
+                DownloadQueueFragment::onNextDownloads,
+                (view, error) -> Timber.e(error.getMessage()));
+
+        if (savedState == null)
+            start(GET_DOWNLOAD_QUEUE);
+    }
+
+    @Override
+    protected void onTakeView(DownloadQueueFragment view) {
+        super.onTakeView(view);
+
+        statusSubscription = downloadQueue.getStatusObservable()
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(download -> {
+                    processStatus(download, view);
+                });
+    }
+
+    @Override
+    protected void onDropView() {
+        destroySubscriptions();
+        super.onDropView();
+    }
+
+    private void processStatus(Download download, DownloadQueueFragment view) {
+        switch (download.getStatus()) {
+            case Download.DOWNLOADING:
+                observeProgress(download, view);
+                break;
+            case Download.DOWNLOADED:
+                unsubscribeProgress(download);
+                download.totalProgress = download.pages.size() * 100;
+                view.updateProgress(download);
+                break;
+        }
+    }
+
+    private void observeProgress(Download download, DownloadQueueFragment view) {
+        Subscription subscription = Observable.interval(50, TimeUnit.MILLISECONDS, Schedulers.newThread())
+                .flatMap(tick -> Observable.from(download.pages)
+                        .map(Page::getProgress)
+                        .reduce((x, y) -> x + y))
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(progress -> {
+                    download.totalProgress = progress;
+                    view.updateProgress(download);
+                });
+
+        progressSubscriptions.put(download, subscription);
+    }
+
+    private void unsubscribeProgress(Download download) {
+        Subscription subscription = progressSubscriptions.remove(download);
+        if (subscription != null)
+            subscription.unsubscribe();
+    }
+
+    private void destroySubscriptions() {
+        for (Subscription subscription : progressSubscriptions.values()) {
+            subscription.unsubscribe();
+        }
+        progressSubscriptions.clear();
+
+        remove(statusSubscription);
+    }
+
+}