Add option to export subscriptions as HTML

1 files changed, 65 insertions, 0 deletions

diff --git a/app/src/main/java/de/danoeh/antennapod/asynctask/ExportWorker.java b/app/src/main/java/de/danoeh/antennapod/asynctask/ExportWorker.java
new file mode 100644
index 000000000..192df8ca5
--- /dev/null
+++ b/app/src/main/java/de/danoeh/antennapod/asynctask/ExportWorker.java
@@ -0,0 +1,65 @@
+package de.danoeh.antennapod.asynctask;
+
+import android.support.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 rx.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 ExportWriter exportWriter;
+    private File output;
+
+    public ExportWorker(ExportWriter exportWriter) {
+        this(exportWriter, new File(UserPreferences.getDataFolder(EXPORT_DIR),
+                DEFAULT_OUTPUT_NAME + "." + exportWriter.fileExtension()));
+    }
+
+    public ExportWorker(ExportWriter exportWriter, @NonNull File output) {
+        this.exportWriter = exportWriter;
+        this.output = output;
+    }
+
+    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);
+                subscriber.onNext(output);
+            } catch (IOException e) {
+                subscriber.onError(e);
+            } finally {
+                if (writer != null) {
+                    try {
+                        writer.close();
+                    } catch (IOException e) {
+                        subscriber.onError(e);
+                    }
+                }
+                subscriber.onCompleted();
+            }
+        });
+    }
+
+}