app/src/main/java/com/stoutner/privacybrowser/activities/ImportExportActivity.java

   1 /*
   2  * Copyright © 2018 Soren Stoutner <soren@stoutner.com>.
   3  *
   4  * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
   5  *
   6  * Privacy Browser is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Privacy Browser is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with Privacy Browser.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 package com.stoutner.privacybrowser.activities;
  21
  22 import android.Manifest;
  23 import android.app.Activity;
  24 import android.app.DialogFragment;
  25 import android.content.Intent;
  26 import android.content.pm.PackageManager;
  27 import android.net.Uri;
  28 import android.os.Build;
  29 import android.os.Bundle;
  30 import android.os.Environment;
  31 import android.provider.DocumentsContract;
  32 import android.support.annotation.NonNull;
  33 import android.support.design.widget.Snackbar;
  34 import android.support.v4.app.ActivityCompat;
  35 import android.support.v4.content.ContextCompat;
  36 import android.support.v7.app.ActionBar;
  37 import android.support.v7.app.AppCompatActivity;
  38 import android.support.v7.widget.Toolbar;
  39 import android.text.Editable;
  40 import android.text.TextWatcher;
  41 import android.view.View;
  42 import android.view.WindowManager;
  43 import android.widget.Button;
  44 import android.widget.EditText;
  45 import android.widget.TextView;
  46
  47 import com.stoutner.privacybrowser.R;
  48 import com.stoutner.privacybrowser.dialogs.ImportExportStoragePermissionDialog;
  49 import com.stoutner.privacybrowser.helpers.ImportExportDatabaseHelper;
  50
  51 import java.io.File;
  52
  53 public class ImportExportActivity extends AppCompatActivity implements ImportExportStoragePermissionDialog.ImportExportStoragePermissionDialogListener {
  54     private final static int EXPORT_FILE_PICKER_REQUEST_CODE = 1;
  55     private final static int IMPORT_FILE_PICKER_REQUEST_CODE = 2;
  56     private final static int EXPORT_REQUEST_CODE = 3;
  57     private final static int IMPORT_REQUEST_CODE = 4;
  58
  59     @Override
  60     public void onCreate(Bundle savedInstanceState) {
  61         // Disable screenshots if not allowed.
  62         if (!MainWebViewActivity.allowScreenshots) {
  63             getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
  64         }
  65
  66         // Set the activity theme.
  67         if (MainWebViewActivity.darkTheme) {
  68             setTheme(R.style.PrivacyBrowserDark_SecondaryActivity);
  69         } else {
  70             setTheme(R.style.PrivacyBrowserLight_SecondaryActivity);
  71         }
  72
  73         // Run the default commands.
  74         super.onCreate(savedInstanceState);
  75
  76         // Set the content view.
  77         setContentView(R.layout.import_export_coordinatorlayout);
  78
  79         // Use the `SupportActionBar` from `android.support.v7.app.ActionBar` until the minimum API is >= 21.
  80         Toolbar importExportAppBar = findViewById(R.id.import_export_toolbar);
  81         setSupportActionBar(importExportAppBar);
  82
  83         // Display the home arrow on the support action bar.
  84         ActionBar appBar = getSupportActionBar();
  85         assert appBar != null;// This assert removes the incorrect warning in Android Studio on the following line that `appBar` might be null.
  86         appBar.setDisplayHomeAsUpEnabled(true);
  87
  88         // Get handles for the views that need to be modified.
  89         EditText exportFileEditText = findViewById(R.id.export_file_edittext);
  90         Button exportButton = findViewById(R.id.export_button);
  91         EditText importFileEditText = findViewById(R.id.import_file_edittext);
  92         Button importButton = findViewById(R.id.import_button);
  93         TextView storagePermissionTextView = findViewById(R.id.import_export_storage_permission_textview);
  94
  95         // Initially disable the buttons.
  96         exportButton.setEnabled(false);
  97         importButton.setEnabled(false);
  98
  99         // Enable the export button when the export file EditText isn't empty.
 100         exportFileEditText.addTextChangedListener(new TextWatcher() {
 101             @Override
 102             public void beforeTextChanged(CharSequence s, int start, int count, int after) {
 103                 // Do nothing.
 104             }
 105
 106             @Override
 107             public void onTextChanged(CharSequence s, int start, int before, int count) {
 108                 // Do nothing.
 109             }
 110
 111             @Override
 112             public void afterTextChanged(Editable s) {
 113                 exportButton.setEnabled(!exportFileEditText.getText().toString().isEmpty());
 114             }
 115         });
 116
 117         // Enable the import button when the export file EditText isn't empty.
 118         importFileEditText.addTextChangedListener(new TextWatcher() {
 119             @Override
 120             public void beforeTextChanged(CharSequence s, int start, int count, int after) {
 121                 // Do nothing.
 122             }
 123
 124             @Override
 125             public void onTextChanged(CharSequence s, int start, int before, int count) {
 126                 // Do nothing.
 127             }
 128
 129             @Override
 130             public void afterTextChanged(Editable s) {
 131                 importButton.setEnabled(!importFileEditText.getText().toString().isEmpty());
 132             }
 133         });
 134
 135         // Set the initial file paths.
 136         if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // The storage permission has been granted.
 137             // Create a string for the external public path.
 138             String EXTERNAL_PUBLIC_PATH = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS) + "/" + getString(R.string.privacy_browser_settings);
 139
 140             // Set the default path.
 141             exportFileEditText.setText(EXTERNAL_PUBLIC_PATH);
 142             importFileEditText.setText(EXTERNAL_PUBLIC_PATH);
 143         } else {  // The storage permission has not been granted.
 144             // Create a string for the external private path.
 145             String EXTERNAL_PRIVATE_PATH = getApplicationContext().getExternalFilesDir(Environment.DIRECTORY_DOCUMENTS) + "/" + getString(R.string.privacy_browser_settings);
 146
 147             // Set the default path.
 148             exportFileEditText.setText(EXTERNAL_PRIVATE_PATH);
 149             importFileEditText.setText(EXTERNAL_PRIVATE_PATH);
 150         }
 151
 152         // Hide the storage permissions TextView on API < 23 as permissions on older devices are automatically granted.
 153         if (Build.VERSION.SDK_INT < 23) {
 154             storagePermissionTextView.setVisibility(View.GONE);
 155         }
 156     }
 157
 158     public void exportBrowse(View view) {
 159         // Create the file picker intent.
 160         Intent intent = new Intent(Intent.ACTION_CREATE_DOCUMENT);
 161
 162         // Set the intent MIME type to include all files.
 163         intent.setType("*/*");
 164
 165         // Set the initial export file name.
 166         intent.putExtra(Intent.EXTRA_TITLE, getString(R.string.privacy_browser_settings));
 167
 168         // Set the initial directory if API >= 26.
 169         if (Build.VERSION.SDK_INT >= 26) {
 170             intent.putExtra(DocumentsContract.EXTRA_INITIAL_URI, Environment.getExternalStorageDirectory());
 171         }
 172
 173         // Specify that a file that can be opened is requested.
 174         intent.addCategory(Intent.CATEGORY_OPENABLE);
 175
 176         // Launch the file picker.
 177         startActivityForResult(intent, EXPORT_FILE_PICKER_REQUEST_CODE);
 178     }
 179
 180     public void onClickExport(View view) {
 181         // Check to see if the storage permission has been granted.
 182         if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // Storage permission granted.
 183             // Export the settings.
 184             exportSettings();
 185         } else {  // Storage permission not granted.
 186             // Get a handle for the export file EditText.
 187             EditText exportFileEditText = findViewById(R.id.export_file_edittext);
 188
 189             // Get the export file string.
 190             String exportFileString = exportFileEditText.getText().toString();
 191
 192             // Get the external private directory `File`.
 193             File externalPrivateDirectoryFile = getApplicationContext().getExternalFilesDir(null);
 194
 195             // Remove the lint error below that the `File` might be null.
 196             assert externalPrivateDirectoryFile != null;
 197
 198             // Get the external private directory string.
 199             String externalPrivateDirectory = externalPrivateDirectoryFile.toString();
 200
 201             // Check to see if the export file path is in the external private directory.
 202             if (exportFileString.startsWith(externalPrivateDirectory)) {  // The export path is in the external private directory.
 203                 // Export the settings.
 204                 exportSettings();
 205             } else {  // The export path is in a public directory.
 206                 // Check if the user has previously denied the storage permission.
 207                 if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
 208                     // Instantiate the storage permission alert dialog and set the type to EXPORT_SETTINGS.
 209                     DialogFragment importExportStoragePermissionDialogFragment = ImportExportStoragePermissionDialog.type(ImportExportStoragePermissionDialog.EXPORT_SETTINGS);
 210
 211                     // Show the storage permission alert dialog.  The permission will be requested when the dialog is closed.
 212                     importExportStoragePermissionDialogFragment.show(getFragmentManager(), getString(R.string.storage_permission));
 213                 } else {  // Show the permission request directly.
 214                     // Request the storage permission.  The export will be run when it finishes.
 215                     ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, EXPORT_REQUEST_CODE);
 216                 }
 217             }
 218         }
 219     }
 220
 221     public void importBrowse(View view) {
 222         // Create the file picker intent.
 223         Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
 224
 225         // Set the intent MIME type to include all files.
 226         intent.setType("*/*");
 227
 228         // Set the initial directory if API >= 26.
 229         if (Build.VERSION.SDK_INT >= 26) {
 230             intent.putExtra(DocumentsContract.EXTRA_INITIAL_URI, Environment.getExternalStorageDirectory());
 231         }
 232
 233         // Specify that a file that can be opened is requested.
 234         intent.addCategory(Intent.CATEGORY_OPENABLE);
 235
 236         // Launch the file picker.
 237         startActivityForResult(intent, IMPORT_FILE_PICKER_REQUEST_CODE);
 238     }
 239
 240     public void onClickImport(View view) {
 241         // Check to see if the storage permission has been granted.
 242         if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // Storage permission granted.
 243             // Import the settings.
 244             importSettings();
 245         } else {  // Storage permission not granted.
 246             // Get a handle for the import file EditText.
 247             EditText importFileEditText = findViewById(R.id.import_file_edittext);
 248
 249             // Get the import file string.
 250             String importFileString = importFileEditText.getText().toString();
 251
 252             // Get the external private directory `File`.
 253             File externalPrivateDirectoryFile = getApplicationContext().getExternalFilesDir(null);
 254
 255             // Remove the lint error below that `File` might be null.
 256             assert externalPrivateDirectoryFile != null;
 257
 258             // Get the external private directory string.
 259             String externalPrivateDirectory = externalPrivateDirectoryFile.toString();
 260
 261             // Check to see if the import file path is in the external private directory.
 262             if (importFileString.startsWith(externalPrivateDirectory)) {  // The import path is in the external private directory.
 263                 // Import the settings.
 264                 importSettings();
 265             } else {  // The import path is in a public directory.
 266                 // Check if the user has previously denied the storage permission.
 267                 if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.READ_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
 268                     // Instantiate the storage permission alert dialog and set the type to IMPORT_SETTINGS.
 269                     DialogFragment importExportStoragePermissionDialogFragment = ImportExportStoragePermissionDialog.type(ImportExportStoragePermissionDialog.IMPORT_SETTINGS);
 270
 271                     // Show the storage permission alert dialog.  The permission will be requested when the dialog is closed.
 272                     importExportStoragePermissionDialogFragment.show(getFragmentManager(), getString(R.string.storage_permission));
 273                 } else {  // Show the permission request directly.
 274                     // Request the storage permission.  The export will be run when it finishes.
 275                     ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.READ_EXTERNAL_STORAGE}, IMPORT_REQUEST_CODE);
 276                 }
 277             }
 278         }
 279     }
 280
 281     @Override
 282     public void onActivityResult(int requestCode, int resultCode, Intent data) {
 283         // Don't do anything if the user pressed back from the file picker.
 284         if (resultCode == Activity.RESULT_OK) {
 285             // Run the commands for the specific request code.
 286             switch (requestCode) {
 287                 case EXPORT_FILE_PICKER_REQUEST_CODE:
 288                     // Get a handle for the export file EditText.
 289                     EditText exportFileEditText = findViewById(R.id.export_file_edittext);
 290
 291                     // Get the selected export file.
 292                     Uri exportUri = data.getData();
 293
 294                     // Remove the lint warning that the export URI might be null.
 295                     assert exportUri != null;
 296
 297                     // Get the raw export path.
 298                     String rawExportPath = exportUri.getPath();
 299
 300                     // Remove the warning that the raw export path might be null.
 301                     assert rawExportPath != null;
 302
 303                     // Check to see if the rawExportPath includes a valid storage location.
 304                     if (rawExportPath.contains(":")) {  // The path is valid.
 305                         // Split the path into the initial content uri and the path information.
 306                         String exportContentPath = rawExportPath.substring(0, rawExportPath.indexOf(":"));
 307                         String exportFilePath = rawExportPath.substring(rawExportPath.indexOf(":") + 1);
 308
 309                         // Create the export path string.
 310                         String exportPath;
 311
 312                         // Construct the export path.
 313                         switch (exportContentPath) {
 314                             // The documents home has a special content path.
 315                             case "/document/home":
 316                                 exportPath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS) + "/" + exportFilePath;
 317                                 break;
 318
 319                             // Everything else for the primary user should be in `/document/primary`.
 320                             case "/document/primary":
 321                                 exportPath = Environment.getExternalStorageDirectory() + "/" + exportFilePath;
 322                                 break;
 323
 324                             // Just in case, catch everything else and place it in the external storage directory.
 325                             default:
 326                                 exportPath = Environment.getExternalStorageDirectory() + "/" + exportFilePath;
 327                                 break;
 328                         }
 329
 330                         // Set the export file URI as the text for the export file EditText.
 331                         exportFileEditText.setText(exportPath);
 332                     } else {  // The path is invalid.
 333                         Snackbar.make(exportFileEditText, rawExportPath + " + " + getString(R.string.invalid_location), Snackbar.LENGTH_INDEFINITE).show();
 334                     }
 335                     break;
 336
 337                 case IMPORT_FILE_PICKER_REQUEST_CODE:
 338                     // Get a handle for the import file EditText.
 339                     EditText importFileEditText = findViewById(R.id.import_file_edittext);
 340
 341                     // Get the selected import file.
 342                     Uri importUri = data.getData();
 343
 344                     // Remove the lint warning that the import URI might be null.
 345                     assert importUri != null;
 346
 347                     // Get the raw import path.
 348                     String rawImportPath = importUri.getPath();
 349
 350                     // Remove the warning that the raw import path might be null.
 351                     assert rawImportPath != null;
 352
 353                     // Check to see if the rawExportPath includes a valid storage location.
 354                     if (rawImportPath.contains(":")) {  // The path is valid.
 355                         // Split the path into the initial content uri and the path information.
 356                         String importContentPath = rawImportPath.substring(0, rawImportPath.indexOf(":"));
 357                         String importFilePath = rawImportPath.substring(rawImportPath.indexOf(":") + 1);
 358
 359                         // Create the export path string.
 360                         String importPath;
 361
 362                         // Construct the export path.
 363                         switch (importContentPath) {
 364                             // The documents folder has a special content path.
 365                             case "/document/home":
 366                                 importPath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS) + "/" + importFilePath;
 367                                 break;
 368
 369                             // Everything else for the primary user should be in `/document/primary`.
 370                             case "/document/primary":
 371                                 importPath = Environment.getExternalStorageDirectory() + "/" + importFilePath;
 372                                 break;
 373
 374                             // Just in case, catch everything else and place it in the external storage directory.
 375                             default:
 376                                 importPath = Environment.getExternalStorageDirectory() + "/" + importFilePath;
 377                                 break;
 378                         }
 379
 380                         // Set the export file URI as the text for the export file EditText.
 381                         importFileEditText.setText(importPath);
 382                     } else {  // The path is invalid.
 383                         Snackbar.make(importFileEditText, rawImportPath + " + " + getString(R.string.invalid_location), Snackbar.LENGTH_INDEFINITE).show();
 384                     }
 385                     break;
 386             }
 387         }
 388     }
 389
 390     @Override
 391     public void onCloseImportExportStoragePermissionDialog(int type) {
 392         // Request the storage permission based on the button that was pressed.
 393         switch (type) {
 394             case ImportExportStoragePermissionDialog.EXPORT_SETTINGS:
 395                 // Request the storage permission.  The export will be run when it finishes.
 396                 ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, EXPORT_REQUEST_CODE);
 397                 break;
 398
 399             case ImportExportStoragePermissionDialog.IMPORT_SETTINGS:
 400                 // Request the storage permission.  The import will be run when it finishes.
 401                 ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.READ_EXTERNAL_STORAGE}, IMPORT_REQUEST_CODE);
 402                 break;
 403         }
 404     }
 405
 406     @Override
 407     public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
 408         switch (requestCode) {
 409             case EXPORT_REQUEST_CODE:
 410                 // Check to see if the storage permission was granted.  If the dialog was canceled the grant results will be empty.
 411                 if ((grantResults.length > 0) && (grantResults[0] == PackageManager.PERMISSION_GRANTED)) {  // The storage permission was granted.
 412                     // Export the settings.
 413                     exportSettings();
 414                 } else {  // The storage permission was not granted.
 415                     // Get a handle for the export file EditText.
 416                     EditText exportFileEditText = findViewById(R.id.export_file_edittext);
 417
 418                     // Display an error snackbar.
 419                     Snackbar.make(exportFileEditText, getString(R.string.cannot_export), Snackbar.LENGTH_LONG).show();
 420                 }
 421                 break;
 422
 423             case IMPORT_REQUEST_CODE:
 424                 // Check to see if the storage permission was granted.  If the dialog was canceled the grant results will be empty.
 425                 if ((grantResults.length > 0) && (grantResults[0] == PackageManager.PERMISSION_GRANTED)) {  // The storage permission was granted.
 426                     // Import the settings.
 427                     importSettings();
 428                 } else {  // The storage permission was not granted.
 429                     // Get a handle for the import file EditText.
 430                     EditText importFileEditText = findViewById(R.id.import_file_edittext);
 431
 432                     // Display an error snackbar.
 433                     Snackbar.make(importFileEditText, getString(R.string.cannot_import), Snackbar.LENGTH_LONG).show();
 434                 }
 435                 break;
 436         }
 437     }
 438
 439     private void exportSettings() {
 440         // Get a handle for the export file EditText.
 441         EditText exportFileEditText = findViewById(R.id.export_file_edittext);
 442
 443         // Get the export file string.
 444         String exportFileString = exportFileEditText.getText().toString();
 445
 446         // Set the export file.
 447         File exportFile = new File(exportFileString);
 448
 449         // Instantiate the import export database helper.
 450         ImportExportDatabaseHelper importExportDatabaseHelper = new ImportExportDatabaseHelper();
 451
 452         // Export the unencrypted file.
 453         String exportStatus = importExportDatabaseHelper.exportUnencrypted(exportFile, getApplicationContext());
 454
 455         // Show a disposition snackbar.
 456         if (exportStatus.equals(ImportExportDatabaseHelper.EXPORT_SUCCESSFUL)) {
 457             Snackbar.make(exportFileEditText, getString(R.string.export_successful), Snackbar.LENGTH_SHORT).show();
 458         } else {
 459             Snackbar.make(exportFileEditText, getString(R.string.export_failed) + "  " + exportStatus, Snackbar.LENGTH_INDEFINITE).show();
 460         }
 461     }
 462
 463     private void importSettings() {
 464         // Get a handle for the import file EditText.
 465         EditText importFileEditText = findViewById(R.id.import_file_edittext);
 466
 467         // Get the import file string.
 468         String importFileString = importFileEditText.getText().toString();
 469
 470         // Set the import file.
 471         File importFile = new File(importFileString);
 472
 473         // Instantiate the import export database helper.
 474         ImportExportDatabaseHelper importExportDatabaseHelper = new ImportExportDatabaseHelper();
 475
 476         // Import the unencrypted file.
 477         String importStatus = importExportDatabaseHelper.importUnencrypted(importFile, getApplicationContext());
 478
 479         // Respond to the import disposition.
 480         if (importStatus.equals(ImportExportDatabaseHelper.IMPORT_SUCCESSFUL)) {  // The import was successful.
 481             // Create an intent to restart Privacy Browser.
 482             Intent restartIntent = getParentActivityIntent();
 483
 484             // Assert that the intent is not null to remove the lint error below.
 485             assert restartIntent != null;
 486
 487             // `Intent.FLAG_ACTIVITY_CLEAR_TASK` removes all activities from the stack.  It requires `Intent.FLAG_ACTIVITY_NEW_TASK`.
 488             restartIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
 489
 490             // Make it so.
 491             startActivity(restartIntent);
 492         } else {  // The import was not successful.
 493             // Display a snack bar with the import error.
 494             Snackbar.make(importFileEditText, getString(R.string.import_failed) + "  " + importStatus, Snackbar.LENGTH_INDEFINITE).show();
 495         }
 496     }
 497 }