settings: add UI options to import/export subscriptions

Author: AndrianaBilali

app/src/main/java/org/schabi/newpipe/settings/BackupRestoreSettingsFragment.java

@@ -34,6 +34,8 @@
 import org.schabi.newpipe.streams.io.StoredFileHelper;
 import org.schabi.newpipe.util.NavigationHelper;
 import org.schabi.newpipe.util.ZipHelper;
+import org.schabi.newpipe.local.subscription.services.SubscriptionsExportService;
+import org.schabi.newpipe.local.subscription.services.SubscriptionsImportService;
 
 import java.io.File;
 import java.io.IOException;
@@ -56,6 +58,13 @@ public class BackupRestoreSettingsFragment extends BasePreferenceFragment {
     private final ActivityResultLauncher<Intent> requestExportPathLauncher =
             registerForActivityResult(new ActivityResultContracts.StartActivityForResult(),
                     this::requestExportPathResult);
+    private final ActivityResultLauncher<Intent> requestExportSubsLauncher =
+            registerForActivityResult(new ActivityResultContracts.StartActivityForResult(),
+                    this::requestExportSubsResult);
+
+    private final ActivityResultLauncher<Intent> requestImportSubsLauncher =
+            registerForActivityResult(new ActivityResultContracts.StartActivityForResult(),
+                    this::requestImportSubsResult);
 
 
     @Override
@@ -123,6 +132,42 @@ ZIP_MIME_TYPE, getImportExportDataUri()),
             alertDialog.show();
             return true;
         });
+
+        final Preference exportSubsPreference = findPreference("export_subscriptions");
+        if (exportSubsPreference != null) {
+            exportSubsPreference.setOnPreferenceClickListener(preference -> {
+                NoFileManagerSafeGuard.launchSafe(
+                        requestExportSubsLauncher,
+                        StoredFileHelper.getNewPicker(
+                                requireContext(),
+                                "newpipe_subscriptions_" + exportDateFormat.format(new Date())
+                                        + ".json",
+                                "application/json",
+                                null
+                        ),
+                        TAG,
+                        getContext()
+                );
+                return true;
+            });
+        }
+
+        final Preference importSubsPreference = findPreference("import_subscriptions");
+        if (importSubsPreference != null) {
+            importSubsPreference.setOnPreferenceClickListener(preference -> {
+                NoFileManagerSafeGuard.launchSafe(
+                        requestImportSubsLauncher,
+                        StoredFileHelper.getPicker(
+                                requireContext(),
+                                "application/json"
+                        ),
+                        TAG,
+                        getContext()
+                );
+                return true;
+            });
+        }
+
     }
 
     private void requestExportPathResult(final ActivityResult result) {
@@ -157,6 +202,36 @@ private void requestImportPathResult(final ActivityResult result) {
         }
     }
 
+    private void requestExportSubsResult(final ActivityResult result) {
+        if (result.getResultCode() == Activity.RESULT_OK && result.getData() != null) {
+            final Uri fileUri = result.getData().getData();
+            if (fileUri != null) {
+                final Intent intent = new Intent(
+                        requireContext(), SubscriptionsExportService.class);
+                intent.putExtra(SubscriptionsExportService.KEY_FILE_PATH, fileUri);
+                requireContext().startService(intent);
+                Toast.makeText(requireContext(), R.string.exporting, Toast.LENGTH_SHORT).show();
+            }
+        }
+    }
+
+    private void requestImportSubsResult(final ActivityResult result) {
+        if (result.getResultCode() == Activity.RESULT_OK && result.getData() != null) {
+            final Uri fileUri = result.getData().getData();
+            if (fileUri != null) {
+                final Intent intent = new Intent(
+                        requireContext(), SubscriptionsImportService.class);
+                intent.putExtra(
+                        SubscriptionsImportService.KEY_MODE,
+                        SubscriptionsImportService.PREVIOUS_EXPORT_MODE
+                );
+                intent.putExtra(SubscriptionsImportService.KEY_VALUE, fileUri);
+                requireContext().startService(intent);
+                Toast.makeText(requireContext(), R.string.importing, Toast.LENGTH_SHORT).show();
+            }
+        }
+    }
+
     private void exportDatabase(final StoredFileHelper file, final Uri exportDataUri) {
         try {
             //checkpoint before export

app/src/main/res/values/strings.xml

@@ -862,4 +862,7 @@
     <string name="show_more">Show more</string>
     <string name="show_less">Show less</string>
     <string name="import_settings_vulnerable_format">The settings in the export being imported use a vulnerable format that was deprecated since NewPipe 0.27.0. Make sure the export being imported is from a trusted source, and prefer using only exports obtained from NewPipe 0.27.0 or newer in the future. Support for importing settings in this vulnerable format will soon be removed completely, and then old versions of NewPipe will not be able to import settings of exports from new versions anymore.</string>
+    <string name="exporting">Exporting subscriptions…</string>
+    <string name="importing">Importing subscriptions…</string>
+
 </resources>

app/src/main/res/xml/backup_restore_settings.xml

@@ -22,4 +22,18 @@
         android:summary="@string/reset_settings_summary"
         app:singleLineTitle="false"
         app:iconSpaceReserved="false" />
+
+    <Preference
+        android:key="export_subscriptions"
+        android:title="Export subscriptions"
+        android:summary="Export your subscriptions to a .json file"
+        app:singleLineTitle="false"
+        app:iconSpaceReserved="false" />
+
+    <Preference
+        android:key="import_subscriptions"
+        android:title="Import subscriptions"
+        android:summary="Import subscriptions from a previous .json export"
+        app:singleLineTitle="false"
+        app:iconSpaceReserved="false" />
 </PreferenceScreen>