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package de.danoeh.antennapod.asynctask;
import android.content.Context;
import android.net.Uri;
import androidx.annotation.NonNull;
import androidx.documentfile.provider.DocumentFile;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import de.danoeh.antennapod.core.export.ExportWriter;
import de.danoeh.antennapod.core.storage.DBReader;
import de.danoeh.antennapod.core.util.LangUtils;
import io.reactivex.Observable;
/**
* Writes an OPML file into the user selected export directory in the background.
*/
public class DocumentFileExportWorker {
private final @NonNull ExportWriter exportWriter;
private @NonNull Context context;
private @NonNull Uri outputFileUri;
public DocumentFileExportWorker(@NonNull ExportWriter exportWriter, @NonNull Context context, @NonNull Uri outputFileUri) {
this.exportWriter = exportWriter;
this.context = context;
this.outputFileUri = outputFileUri;
}
public Observable<DocumentFile> exportObservable() {
DocumentFile output = DocumentFile.fromSingleUri(context, outputFileUri);
return Observable.create(subscriber -> {
OutputStream outputStream = null;
OutputStreamWriter writer = null;
try {
Uri uri = output.getUri();
if (uri == null) {
throw new FileNotFoundException("Export file not found.");
}
outputStream = context.getContentResolver().openOutputStream(uri);
if (outputStream == null) {
throw new IOException();
}
writer = new OutputStreamWriter(outputStream, LangUtils.UTF_8);
exportWriter.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);
}
}
if (outputStream != null) {
try {
outputStream.close();
} catch (IOException e) {
subscriber.onError(e);
}
}
subscriber.onComplete();
}
});
}
}
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