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package de.danoeh.antennapod.asynctask;
import android.util.Log;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import de.danoeh.antennapod.core.opml.OpmlWriter;
import de.danoeh.antennapod.core.preferences.UserPreferences;
import de.danoeh.antennapod.core.storage.DBReader;
import de.danoeh.antennapod.core.util.LangUtils;
import rx.Observable;
/**
* Writes an OPML file into the export directory in the background.
*/
public class OpmlExportWorker {
public static final String EXPORT_DIR = "export/";
private static final String TAG = "OpmlExportWorker";
private static final String DEFAULT_OUTPUT_NAME = "antennapod-feeds.opml";
private File output;
public OpmlExportWorker() {
this(new File(UserPreferences.getDataFolder(EXPORT_DIR), DEFAULT_OUTPUT_NAME));
}
public OpmlExportWorker(File output) {
this.output = output;
}
public Observable<File> exportObservable() {
if (output.exists()) {
Log.w(TAG, "Overwriting previously exported file.");
output.delete();
}
OpmlWriter opmlWriter = new OpmlWriter();
return Observable.create(subscriber -> {
OutputStreamWriter writer = null;
try {
writer = new OutputStreamWriter(new FileOutputStream(output), LangUtils.UTF_8);
opmlWriter.writeDocument(DBReader.getFeedList(), writer);
subscriber.onNext(output);
} catch (IOException e) {
subscriber.onError(e);
} finally {
if (writer != null) {
try {
writer.close();
} catch (IOException e) {
subscriber.onError(e);
}
}
subscriber.onCompleted();
}
});
}
}
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