Split import/export and storage preferences

1 files changed, 191 insertions, 0 deletions

diff --git a/app/src/main/java/de/danoeh/antennapod/fragment/preferences/ImportExportPreferencesFragment.java b/app/src/main/java/de/danoeh/antennapod/fragment/preferences/ImportExportPreferencesFragment.java
new file mode 100644
index 000000000..ca69414f1
--- /dev/null
+++ b/app/src/main/java/de/danoeh/antennapod/fragment/preferences/ImportExportPreferencesFragment.java
@@ -0,0 +1,191 @@
+package de.danoeh.antennapod.fragment.preferences;
+
+import android.annotation.SuppressLint;
+import android.app.Activity;
+import android.app.ProgressDialog;
+import android.content.ActivityNotFoundException;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Bundle;
+import android.util.Log;
+import androidx.appcompat.app.AlertDialog;
+import androidx.core.content.FileProvider;
+import androidx.documentfile.provider.DocumentFile;
+import androidx.preference.PreferenceFragmentCompat;
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.activity.ImportExportActivity;
+import de.danoeh.antennapod.activity.OpmlImportFromPathActivity;
+import de.danoeh.antennapod.activity.PreferenceActivity;
+import de.danoeh.antennapod.asynctask.DocumentFileExportWorker;
+import de.danoeh.antennapod.asynctask.ExportWorker;
+import de.danoeh.antennapod.core.export.ExportWriter;
+import de.danoeh.antennapod.core.export.html.HtmlWriter;
+import de.danoeh.antennapod.core.export.opml.OpmlWriter;
+import io.reactivex.Observable;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.schedulers.Schedulers;
+
+import java.io.File;
+import java.util.List;
+
+public class ImportExportPreferencesFragment extends PreferenceFragmentCompat {
+    private static final String TAG = "ImportExPrefFragment";
+    private static final String PREF_OPML_EXPORT = "prefOpmlExport";
+    private static final String PREF_OPML_IMPORT = "prefOpmlImport";
+    private static final String PREF_HTML_EXPORT = "prefHtmlExport";
+    private static final String IMPORT_EXPORT = "importExport";
+    private static final int CHOOSE_OPML_EXPORT_PATH = 1;
+    private static final String DEFAULT_OPML_OUTPUT_NAME = "antennapod-feeds.opml";
+    private static final String CONTENT_TYPE_OPML = "text/x-opml";
+    private static final int CHOOSE_HTML_EXPORT_PATH = 2;
+    private static final String DEFAULT_HTML_OUTPUT_NAME = "antennapod-feeds.html";
+    private static final String CONTENT_TYPE_HTML = "text/html";
+    private Disposable disposable;
+
+    @Override
+    public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
+        addPreferencesFromResource(R.xml.preferences_import_export);
+        setupStorageScreen();
+    }
+
+    @Override
+    public void onStart() {
+        super.onStart();
+        ((PreferenceActivity) getActivity()).getSupportActionBar().setTitle(R.string.import_export_pref);
+    }
+
+    @Override
+    public void onStop() {
+        super.onStop();
+        if (disposable != null) {
+            disposable.dispose();
+        }
+    }
+
+    private void setupStorageScreen() {
+        final Activity activity = getActivity();
+
+        findPreference(IMPORT_EXPORT).setOnPreferenceClickListener(
+                preference -> {
+                    activity.startActivity(new Intent(activity, ImportExportActivity.class));
+                    return true;
+                }
+        );
+        findPreference(PREF_OPML_EXPORT).setOnPreferenceClickListener(
+                preference -> {
+                    openExportPathPicker(CONTENT_TYPE_OPML, DEFAULT_OPML_OUTPUT_NAME,
+                            CHOOSE_OPML_EXPORT_PATH, new OpmlWriter());
+                    return true;
+                }
+        );
+        findPreference(PREF_HTML_EXPORT).setOnPreferenceClickListener(
+                preference -> {
+                    openExportPathPicker(CONTENT_TYPE_HTML, DEFAULT_HTML_OUTPUT_NAME,
+                            CHOOSE_HTML_EXPORT_PATH, new HtmlWriter());
+                    return true;
+                });
+        findPreference(PREF_OPML_IMPORT).setOnPreferenceClickListener(
+                preference -> {
+                    activity.startActivity(new Intent(activity, OpmlImportFromPathActivity.class));
+                    return true;
+                });
+    }
+
+    private boolean export(ExportWriter exportWriter, final Uri uri) {
+        Context context = getActivity();
+        final ProgressDialog progressDialog = new ProgressDialog(context);
+        progressDialog.setMessage(context.getString(R.string.exporting_label));
+        progressDialog.setIndeterminate(true);
+        progressDialog.show();
+        if (uri == null) {
+            Observable<File> observable = new ExportWorker(exportWriter, getContext()).exportObservable();
+            disposable = observable.subscribeOn(Schedulers.io())
+                    .observeOn(AndroidSchedulers.mainThread())
+                    .subscribe(output -> {
+                        Uri fileUri = FileProvider.getUriForFile(context.getApplicationContext(),
+                                context.getString(R.string.provider_authority), output);
+                        showExportSuccessDialog(context.getString(R.string.export_success_sum, output.toString()), fileUri);
+                    }, this::showExportErrorDialog, progressDialog::dismiss);
+        } else {
+            Observable<DocumentFile> observable = new DocumentFileExportWorker(exportWriter, context, uri).exportObservable();
+            disposable = observable.subscribeOn(Schedulers.io())
+                    .observeOn(AndroidSchedulers.mainThread())
+                    .subscribe(output -> {
+                        showExportSuccessDialog(context.getString(R.string.export_success_sum, output.getUri()), output.getUri());
+                    }, this::showExportErrorDialog, progressDialog::dismiss);
+        }
+        return true;
+    }
+
+    private void showExportSuccessDialog(final String message, final Uri streamUri) {
+        final AlertDialog.Builder alert = new AlertDialog.Builder(getContext())
+                .setNeutralButton(android.R.string.ok, (dialog, which) -> dialog.dismiss());
+        alert.setTitle(R.string.export_success_title);
+        alert.setMessage(message);
+        alert.setPositiveButton(R.string.send_label, (dialog, which) -> {
+            Intent sendIntent = new Intent(Intent.ACTION_SEND);
+            sendIntent.putExtra(Intent.EXTRA_SUBJECT, getString(R.string.opml_export_label));
+            sendIntent.putExtra(Intent.EXTRA_STREAM, streamUri);
+            sendIntent.setType("text/plain");
+            sendIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
+            if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) {
+                List<ResolveInfo> resInfoList = getContext().getPackageManager()
+                        .queryIntentActivities(sendIntent, PackageManager.MATCH_DEFAULT_ONLY);
+                for (ResolveInfo resolveInfo : resInfoList) {
+                    String packageName = resolveInfo.activityInfo.packageName;
+                    getContext().grantUriPermission(packageName, streamUri, Intent.FLAG_GRANT_READ_URI_PERMISSION);
+                }
+            }
+            getContext().startActivity(Intent.createChooser(sendIntent, getString(R.string.send_label)));
+        });
+        alert.create().show();
+    }
+
+    private void showExportErrorDialog(final Throwable error) {
+        final AlertDialog.Builder alert = new AlertDialog.Builder(getContext())
+                .setNeutralButton(android.R.string.ok, (dialog, which) -> dialog.dismiss());
+        alert.setTitle(R.string.export_error_label);
+        alert.setMessage(error.getMessage());
+        alert.show();
+    }
+
+    @SuppressLint("NewApi")
+    public void onActivityResult(int requestCode, int resultCode, Intent data) {
+        if (resultCode == Activity.RESULT_OK && requestCode == CHOOSE_OPML_EXPORT_PATH) {
+            Uri uri = data.getData();
+            export(new OpmlWriter(), uri);
+        }
+
+        if (resultCode == Activity.RESULT_OK && requestCode == CHOOSE_HTML_EXPORT_PATH) {
+            Uri uri = data.getData();
+            export(new HtmlWriter(), uri);
+        }
+    }
+
+    private void openExportPathPicker(String contentType, String title, int requestCode, ExportWriter writer) {
+        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.JELLY_BEAN_MR2) {
+            Intent intentPickAction = new Intent(Intent.ACTION_CREATE_DOCUMENT)
+                    .addCategory(Intent.CATEGORY_OPENABLE)
+                    .setType(contentType)
+                    .putExtra(Intent.EXTRA_TITLE, title);
+
+            // Creates an implicit intent to launch a file manager which lets
+            // the user choose a specific directory to export to.
+            try {
+                startActivityForResult(intentPickAction, requestCode);
+                return;
+            } catch (ActivityNotFoundException e) {
+                Log.e(TAG, "No activity found. Should never happen...");
+            }
+        }
+
+        // If we are using a SDK lower than API 21 or the implicit intent failed
+        // fallback to the legacy export process
+        export(writer, null);
+    }
+}