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package de.danoeh.antennapod.asynctask;
import android.content.Context;
import androidx.annotation.NonNull;
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.export.ExportWriter;
import de.danoeh.antennapod.core.preferences.UserPreferences;
import de.danoeh.antennapod.core.storage.DBReader;
import de.danoeh.antennapod.core.util.LangUtils;
import io.reactivex.Observable;
/**
* Writes an OPML file into the export directory in the background.
*/
public class ExportWorker {
private static final String EXPORT_DIR = "export/";
private static final String TAG = "ExportWorker";
private static final String DEFAULT_OUTPUT_NAME = "antennapod-feeds";
private final @NonNull ExportWriter exportWriter;
private final @NonNull File output;
private final Context context;
public ExportWorker(@NonNull ExportWriter exportWriter, Context context) {
this(exportWriter, new File(UserPreferences.getDataFolder(EXPORT_DIR),
DEFAULT_OUTPUT_NAME + "." + exportWriter.fileExtension()), context);
}
private ExportWorker(@NonNull ExportWriter exportWriter, @NonNull File output, Context context) {
this.exportWriter = exportWriter;
this.output = output;
this.context = context;
}
public Observable<File> exportObservable() {
if (output.exists()) {
Log.w(TAG, "Overwriting previously exported file.");
output.delete();
}
return Observable.create(subscriber -> {
OutputStreamWriter writer = null;
try {
writer = new OutputStreamWriter(new FileOutputStream(output), LangUtils.UTF_8);
exportWriter.writeDocument(DBReader.getFeedList(), writer, context);
subscriber.onNext(output);
} catch (IOException e) {
subscriber.onError(e);
} finally {
if (writer != null) {
try {
writer.close();
} catch (IOException e) {
subscriber.onError(e);
}
}
subscriber.onComplete();
}
});
}
}
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