src/com/owncloud/android/authentication/AuthenticatorActivity.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012  Bartek Przybylski
   3  *   Copyright (C) 2012-2013 ownCloud Inc.
   4  *
   5  *   This program is free software: you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License version 2,
   7  *   as published by the Free Software Foundation.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  */
  18
  19 package com.owncloud.android.authentication;
  20
  21 import com.owncloud.android.Log_OC;
  22 import com.owncloud.android.ui.dialog.SslValidatorDialog;
  23 import com.owncloud.android.ui.dialog.SslValidatorDialog.OnSslValidatorListener;
  24 import com.owncloud.android.utils.OwnCloudVersion;
  25 import com.owncloud.android.network.OwnCloudClientUtils;
  26 import com.owncloud.android.operations.OwnCloudServerCheckOperation;
  27 import com.owncloud.android.operations.ExistenceCheckOperation;
  28 import com.owncloud.android.operations.OAuth2GetAccessToken;
  29 import com.owncloud.android.operations.OnRemoteOperationListener;
  30 import com.owncloud.android.operations.RemoteOperation;
  31 import com.owncloud.android.operations.RemoteOperationResult;
  32 import com.owncloud.android.operations.RemoteOperationResult.ResultCode;
  33
  34 import android.accounts.Account;
  35 import android.accounts.AccountAuthenticatorActivity;
  36 import android.accounts.AccountManager;
  37 import android.app.AlertDialog;
  38 import android.app.Dialog;
  39 import android.app.ProgressDialog;
  40 import android.content.ContentResolver;
  41 import android.content.DialogInterface;
  42 import android.content.Intent;
  43 import android.content.SharedPreferences;
  44 import android.graphics.Rect;
  45 import android.graphics.drawable.Drawable;
  46 import android.net.Uri;
  47 import android.os.Bundle;
  48 import android.os.Handler;
  49 import android.preference.PreferenceManager;
  50 import android.text.Editable;
  51 import android.text.InputType;
  52 import android.text.TextWatcher;
  53 import android.view.KeyEvent;
  54 import android.view.MotionEvent;
  55 import android.view.View;
  56 import android.view.View.OnFocusChangeListener;
  57 import android.view.View.OnTouchListener;
  58 import android.view.Window;
  59 import android.view.inputmethod.EditorInfo;
  60 import android.widget.CheckBox;
  61 import android.widget.EditText;
  62 import android.widget.Button;
  63 import android.widget.TextView;
  64 import android.widget.Toast;
  65 import android.widget.TextView.OnEditorActionListener;
  66
  67 import com.owncloud.android.R;
  68
  69 import eu.alefzero.webdav.WebdavClient;
  70
  71 /**
  72  * This Activity is used to add an ownCloud account to the App
  73  *
  74  * @author Bartek Przybylski
  75  * @author David A. Velasco
  76  */
  77 public class AuthenticatorActivity extends AccountAuthenticatorActivity
  78 implements  OnRemoteOperationListener, OnSslValidatorListener, OnFocusChangeListener, OnEditorActionListener {
  79
  80     private static final String TAG = AuthenticatorActivity.class.getSimpleName();
  81
  82     public static final String EXTRA_ACCOUNT = "ACCOUNT";
  83     public static final String EXTRA_USER_NAME = "USER_NAME";
  84     public static final String EXTRA_HOST_NAME = "HOST_NAME";
  85     public static final String EXTRA_ACTION = "ACTION";
  86
  87     private static final String KEY_HOST_URL_TEXT = "HOST_URL_TEXT";
  88     private static final String KEY_OC_VERSION = "OC_VERSION";
  89     private static final String KEY_ACCOUNT = "ACCOUNT";
  90     private static final String KEY_SERVER_VALID = "SERVER_VALID";
  91     private static final String KEY_SERVER_CHECKED = "SERVER_CHECKED";
  92     private static final String KEY_SERVER_CHECK_IN_PROGRESS = "SERVER_CHECK_IN_PROGRESS";
  93     private static final String KEY_SERVER_STATUS_TEXT = "SERVER_STATUS_TEXT";
  94     private static final String KEY_SERVER_STATUS_ICON = "SERVER_STATUS_ICON";
  95     private static final String KEY_IS_SSL_CONN = "IS_SSL_CONN";
  96     private static final String KEY_PASSWORD_VISIBLE = "PASSWORD_VISIBLE";
  97     private static final String KEY_AUTH_STATUS_TEXT = "AUTH_STATUS_TEXT";
  98     private static final String KEY_AUTH_STATUS_ICON = "AUTH_STATUS_ICON";
  99     private static final String KEY_REFRESH_BUTTON_ENABLED = "KEY_REFRESH_BUTTON_ENABLED";
 100
 101     private static final String OAUTH_MODE_ON = "on";
 102     private static final String OAUTH_MODE_OFF = "off";
 103     private static final String OAUTH_MODE_OPTIONAL = "optional";
 104
 105     private static final int DIALOG_LOGIN_PROGRESS = 0;
 106     private static final int DIALOG_SSL_VALIDATOR = 1;
 107     private static final int DIALOG_CERT_NOT_SAVED = 2;
 108     private static final int DIALOG_OAUTH2_LOGIN_PROGRESS = 3;
 109
 110     public static final byte ACTION_CREATE = 0;
 111     public static final byte ACTION_UPDATE_TOKEN = 1;
 112
 113     private String mHostBaseUrl;
 114     private OwnCloudVersion mDiscoveredVersion;
 115
 116     private int mServerStatusText, mServerStatusIcon;
 117     private boolean mServerIsChecked, mServerIsValid, mIsSslConn;
 118     private int mAuthStatusText, mAuthStatusIcon;
 119
 120     private final Handler mHandler = new Handler();
 121     private Thread mOperationThread;
 122     private OwnCloudServerCheckOperation mOcServerChkOperation;
 123     private ExistenceCheckOperation mAuthCheckOperation;
 124     private RemoteOperationResult mLastSslUntrustedServerResult;
 125
 126     private Uri mNewCapturedUriFromOAuth2Redirection;
 127
 128     private AccountManager mAccountMgr;
 129     private boolean mJustCreated;
 130     private byte mAction;
 131     private Account mAccount;
 132
 133     private EditText mHostUrlInput;
 134     private EditText mUsernameInput;
 135     private EditText mPasswordInput;
 136     private CheckBox mOAuth2Check;
 137     private String mOAuthAccessToken;
 138     private View mOkButton;
 139     private TextView mAuthStatusLayout;
 140
 141     private TextView mOAuthAuthEndpointText;
 142     private TextView mOAuthTokenEndpointText;
 143
 144     private boolean mRefreshButtonEnabled;
 145
 146
 147     /**
 148      * {@inheritDoc}
 149      *
 150      * IMPORTANT ENTRY POINT 1: activity is shown to the user
 151      */
 152     @Override
 153     protected void onCreate(Bundle savedInstanceState) {
 154         super.onCreate(savedInstanceState);
 155         getWindow().requestFeature(Window.FEATURE_NO_TITLE);
 156
 157         /// set view and get references to view elements
 158         setContentView(R.layout.account_setup);
 159         mHostUrlInput = (EditText) findViewById(R.id.hostUrlInput);
 160         mUsernameInput = (EditText) findViewById(R.id.account_username);
 161         mPasswordInput = (EditText) findViewById(R.id.account_password);
 162         mOAuthAuthEndpointText = (TextView)findViewById(R.id.oAuthEntryPoint_1);
 163         mOAuthTokenEndpointText = (TextView)findViewById(R.id.oAuthEntryPoint_2);
 164         mOAuth2Check = (CheckBox) findViewById(R.id.oauth_onOff_check);
 165         mOkButton = findViewById(R.id.buttonOK);
 166         mAuthStatusLayout = (TextView) findViewById(R.id.auth_status_text);
 167
 168         /// complete label for 'register account' button
 169         Button b = (Button) findViewById(R.id.account_register);
 170         if (b != null) {
 171             b.setText(String.format(getString(R.string.auth_register), getString(R.string.app_name)));
 172         }
 173
 174         /// initialization
 175         mAccountMgr = AccountManager.get(this);
 176         mNewCapturedUriFromOAuth2Redirection = null;
 177         mAction = getIntent().getByteExtra(EXTRA_ACTION, ACTION_CREATE);
 178         mAccount = null;
 179         mHostBaseUrl = "";
 180
 181         if (savedInstanceState == null) {
 182             /// connection state and info
 183             mServerStatusText = mServerStatusIcon = 0;
 184             mServerIsValid = false;
 185             mServerIsChecked = false;
 186             mIsSslConn = false;
 187             mAuthStatusText = mAuthStatusIcon = 0;
 188
 189             /// retrieve extras from intent
 190             String tokenType = getIntent().getExtras().getString(AccountAuthenticator.KEY_AUTH_TOKEN_TYPE);
 191             boolean oAuthRequired = AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN.equals(tokenType) || OAUTH_MODE_ON.equals(getString(R.string.oauth2_mode));
 192
 193             mAccount = getIntent().getExtras().getParcelable(EXTRA_ACCOUNT);
 194             if (mAccount != null) {
 195                 String ocVersion = mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_OC_VERSION);
 196                 if (ocVersion != null) {
 197                     mDiscoveredVersion = new OwnCloudVersion(ocVersion);
 198                 }
 199                 mHostBaseUrl = normalizeUrl(mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_OC_BASE_URL));
 200                 mHostUrlInput.setText(mHostBaseUrl);
 201                 String userName = mAccount.name.substring(0, mAccount.name.lastIndexOf('@'));
 202                 mUsernameInput.setText(userName);
 203                 oAuthRequired = (mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_SUPPORTS_OAUTH2) != null);
 204             }
 205             mOAuth2Check.setChecked(oAuthRequired);
 206             changeViewByOAuth2Check(oAuthRequired);
 207
 208
 209         } else {
 210             /// connection state and info
 211             mServerIsValid = savedInstanceState.getBoolean(KEY_SERVER_VALID);
 212             mServerIsChecked = savedInstanceState.getBoolean(KEY_SERVER_CHECKED);
 213             mServerStatusText = savedInstanceState.getInt(KEY_SERVER_STATUS_TEXT);
 214             mServerStatusIcon = savedInstanceState.getInt(KEY_SERVER_STATUS_ICON);
 215             mIsSslConn = savedInstanceState.getBoolean(KEY_IS_SSL_CONN);
 216             mAuthStatusText = savedInstanceState.getInt(KEY_AUTH_STATUS_TEXT);
 217             mAuthStatusIcon = savedInstanceState.getInt(KEY_AUTH_STATUS_ICON);
 218             if (savedInstanceState.getBoolean(KEY_PASSWORD_VISIBLE, false)) {
 219                 showPassword();
 220             }
 221
 222             /// server data
 223             String ocVersion = savedInstanceState.getString(KEY_OC_VERSION);
 224             if (ocVersion != null) {
 225                 mDiscoveredVersion = new OwnCloudVersion(ocVersion);
 226             }
 227             mHostBaseUrl = savedInstanceState.getString(KEY_HOST_URL_TEXT);
 228
 229             // account data, if updating
 230             mAccount = savedInstanceState.getParcelable(KEY_ACCOUNT);
 231
 232             // check if server check was interrupted by a configuration change
 233             if (savedInstanceState.getBoolean(KEY_SERVER_CHECK_IN_PROGRESS, false)) {
 234                 checkOcServer();
 235             }
 236
 237             // refresh button enabled
 238             mRefreshButtonEnabled = savedInstanceState.getBoolean(KEY_REFRESH_BUTTON_ENABLED);
 239
 240         }
 241
 242         showServerStatus();
 243         showAuthStatus();
 244         if (mServerIsChecked && !mServerIsValid && mRefreshButtonEnabled) showRefreshButton();
 245         mOkButton.setEnabled(mServerIsValid); // state not automatically recovered in configuration changes
 246
 247         if (!OAUTH_MODE_OPTIONAL.equals(getString(R.string.oauth2_mode))) {
 248             mOAuth2Check.setVisibility(View.GONE);
 249         }
 250
 251         if (mAction == ACTION_UPDATE_TOKEN) {
 252             /// lock things that should not change
 253             mHostUrlInput.setEnabled(false);
 254             mUsernameInput.setEnabled(false);
 255             mOAuth2Check.setVisibility(View.GONE);
 256             if (!mServerIsValid && mOcServerChkOperation == null) {
 257                 checkOcServer();
 258             }
 259         }
 260
 261         mPasswordInput.setText("");     // clean password to avoid social hacking (disadvantage: password in removed if the device is turned aside)
 262         mJustCreated = true;
 263
 264         /// bind view elements to listeners
 265         mHostUrlInput.setOnFocusChangeListener(this);
 266         mHostUrlInput.setOnTouchListener(new RightDrawableOnTouchListener() {
 267             @Override
 268             public boolean onDrawableTouch(final MotionEvent event) {
 269                 if (event.getAction() == MotionEvent.ACTION_UP) {
 270                     AuthenticatorActivity.this.onRefreshClick();
 271                 }
 272                 return true;
 273             }
 274         });
 275         mHostUrlInput.addTextChangedListener(new TextWatcher() {
 276
 277             @Override
 278             public void afterTextChanged(Editable s) {
 279                 if (!mHostBaseUrl.equals(normalizeUrl(mHostUrlInput.getText().toString()))) {
 280                     mOkButton.setEnabled(false);
 281                 }
 282             }
 283
 284             @Override
 285             public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
 286
 287             @Override
 288             public void onTextChanged(CharSequence s, int start, int before, int count) {}
 289
 290         });
 291         mPasswordInput.setOnFocusChangeListener(this);
 292         mPasswordInput.setImeOptions(EditorInfo.IME_ACTION_DONE);
 293         mPasswordInput.setOnEditorActionListener(this);
 294         mPasswordInput.setOnTouchListener(new RightDrawableOnTouchListener() {
 295             @Override
 296             public boolean onDrawableTouch(final MotionEvent event) {
 297                 if (event.getAction() == MotionEvent.ACTION_UP) {
 298                     AuthenticatorActivity.this.onViewPasswordClick();
 299                 }
 300                 return true;
 301             }
 302         });
 303     }
 304
 305     /**
 306      * Saves relevant state before {@link #onPause()}
 307      *
 308      * Do NOT save {@link #mNewCapturedUriFromOAuth2Redirection}; it keeps a temporal flag, intended to defer the
 309      * processing of the redirection caught in {@link #onNewIntent(Intent)} until {@link #onResume()}
 310      *
 311      * See {@link #loadSavedInstanceState(Bundle)}
 312      */
 313     @Override
 314     protected void onSaveInstanceState(Bundle outState) {
 315         super.onSaveInstanceState(outState);
 316
 317         /// connection state and info
 318         outState.putInt(KEY_SERVER_STATUS_TEXT, mServerStatusText);
 319         outState.putInt(KEY_SERVER_STATUS_ICON, mServerStatusIcon);
 320         outState.putBoolean(KEY_SERVER_VALID, mServerIsValid);
 321         outState.putBoolean(KEY_SERVER_CHECKED, mServerIsChecked);
 322         outState.putBoolean(KEY_SERVER_CHECK_IN_PROGRESS, (!mServerIsValid && mOcServerChkOperation != null));
 323         outState.putBoolean(KEY_IS_SSL_CONN, mIsSslConn);
 324         outState.putBoolean(KEY_PASSWORD_VISIBLE, isPasswordVisible());
 325         outState.putInt(KEY_AUTH_STATUS_ICON, mAuthStatusIcon);
 326         outState.putInt(KEY_AUTH_STATUS_TEXT, mAuthStatusText);
 327
 328         /// server data
 329         if (mDiscoveredVersion != null) {
 330             outState.putString(KEY_OC_VERSION, mDiscoveredVersion.toString());
 331         }
 332         outState.putString(KEY_HOST_URL_TEXT, mHostBaseUrl);
 333
 334         /// account data, if updating
 335         if (mAccount != null) {
 336             outState.putParcelable(KEY_ACCOUNT, mAccount);
 337         }
 338
 339         // refresh button enabled
 340         outState.putBoolean(KEY_REFRESH_BUTTON_ENABLED, mRefreshButtonEnabled);
 341
 342     }
 343
 344
 345     /**
 346      * The redirection triggered by the OAuth authentication server as response to the GET AUTHORIZATION request
 347      * is caught here.
 348      *
 349      * To make this possible, this activity needs to be qualified with android:launchMode = "singleTask" in the
 350      * AndroidManifest.xml file.
 351      */
 352     @Override
 353     protected void onNewIntent (Intent intent) {
 354         Log_OC.d(TAG, "onNewIntent()");
 355         Uri data = intent.getData();
 356         if (data != null && data.toString().startsWith(getString(R.string.oauth2_redirect_uri))) {
 357             mNewCapturedUriFromOAuth2Redirection = data;
 358         }
 359     }
 360
 361
 362     /**
 363      * The redirection triggered by the OAuth authentication server as response to the GET AUTHORIZATION, and
 364      * deferred in {@link #onNewIntent(Intent)}, is processed here.
 365      */
 366     @Override
 367     protected void onResume() {
 368         super.onResume();
 369         // the state of mOAuth2Check is automatically recovered between configuration changes, but not before onCreate() finishes; so keep the next lines here
 370         changeViewByOAuth2Check(mOAuth2Check.isChecked());
 371         if (mAction == ACTION_UPDATE_TOKEN && mJustCreated) {
 372             if (mOAuth2Check.isChecked())
 373                 Toast.makeText(this, R.string.auth_expired_oauth_token_toast, Toast.LENGTH_LONG).show();
 374             else
 375                 Toast.makeText(this, R.string.auth_expired_basic_auth_toast, Toast.LENGTH_LONG).show();
 376         }
 377
 378         if (mNewCapturedUriFromOAuth2Redirection != null) {
 379             getOAuth2AccessTokenFromCapturedRedirection();
 380         }
 381
 382         mJustCreated = false;
 383     }
 384
 385
 386     /**
 387      * Parses the redirection with the response to the GET AUTHORIZATION request to the
 388      * oAuth server and requests for the access token (GET ACCESS TOKEN)
 389      */
 390     private void getOAuth2AccessTokenFromCapturedRedirection() {
 391         /// Parse data from OAuth redirection
 392         String queryParameters = mNewCapturedUriFromOAuth2Redirection.getQuery();
 393         mNewCapturedUriFromOAuth2Redirection = null;
 394
 395         /// Showing the dialog with instructions for the user.
 396         showDialog(DIALOG_OAUTH2_LOGIN_PROGRESS);
 397
 398         /// GET ACCESS TOKEN to the oAuth server
 399         RemoteOperation operation = new OAuth2GetAccessToken(   getString(R.string.oauth2_client_id),
 400                 getString(R.string.oauth2_redirect_uri),
 401                 getString(R.string.oauth2_grant_type),
 402                 queryParameters);
 403         //WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(getString(R.string.oauth2_url_endpoint_access)), getApplicationContext());
 404         WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mOAuthTokenEndpointText.getText().toString().trim()), getApplicationContext());
 405         operation.execute(client, this, mHandler);
 406     }
 407
 408
 409
 410     /**
 411      * Handles the change of focus on the text inputs for the server URL and the password
 412      */
 413     public void onFocusChange(View view, boolean hasFocus) {
 414         if (view.getId() == R.id.hostUrlInput) {
 415             if (!hasFocus) {
 416                 onUrlInputFocusLost((TextView) view);
 417                 if (!mServerIsValid) {
 418                     showRefreshButton();
 419                 }
 420             }
 421             else {
 422                 hideRefreshButton();
 423             }
 424
 425         } else if (view.getId() == R.id.account_password) {
 426             onPasswordFocusChanged((TextView) view, hasFocus);
 427         }
 428     }
 429
 430
 431     /**
 432      * Handles changes in focus on the text input for the server URL.
 433      *
 434      * IMPORTANT ENTRY POINT 2: When (!hasFocus), user wrote the server URL and changed to
 435      * other field. The operation to check the existence of the server in the entered URL is
 436      * started.
 437      *
 438      * When hasFocus:    user 'comes back' to write again the server URL.
 439      *
 440      * @param hostInput     TextView with the URL input field receiving the change of focus.
 441      */
 442     private void onUrlInputFocusLost(TextView hostInput) {
 443         if (!mHostBaseUrl.equals(normalizeUrl(mHostUrlInput.getText().toString()))) {
 444             checkOcServer();
 445         } else {
 446             mOkButton.setEnabled(mServerIsValid);
 447         }
 448     }
 449
 450
 451     private void checkOcServer() {
 452         String uri = trimUrlWebdav(mHostUrlInput.getText().toString().trim());
 453         mServerIsValid = false;
 454         mServerIsChecked = false;
 455         mOkButton.setEnabled(false);
 456         mDiscoveredVersion = null;
 457         hideRefreshButton();
 458         if (uri.length() != 0) {
 459             mServerStatusText = R.string.auth_testing_connection;
 460             mServerStatusIcon = R.drawable.progress_small;
 461             showServerStatus();
 462             mOcServerChkOperation = new  OwnCloudServerCheckOperation(uri, this);
 463             WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(uri), this);
 464             mOperationThread = mOcServerChkOperation.execute(client, this, mHandler);
 465         } else {
 466             mServerStatusText = 0;
 467             mServerStatusIcon = 0;
 468             showServerStatus();
 469         }
 470     }
 471
 472
 473     /**
 474      * Handles changes in focus on the text input for the password (basic authorization).
 475      *
 476      * When (hasFocus), the button to toggle password visibility is shown.
 477      *
 478      * When (!hasFocus), the button is made invisible and the password is hidden.
 479      *
 480      * @param passwordInput    TextView with the password input field receiving the change of focus.
 481      * @param hasFocus          'True' if focus is received, 'false' if is lost
 482      */
 483     private void onPasswordFocusChanged(TextView passwordInput, boolean hasFocus) {
 484         if (hasFocus) {
 485             showViewPasswordButton();
 486         } else {
 487             hidePassword();
 488             hidePasswordButton();
 489         }
 490     }
 491
 492
 493     private void showViewPasswordButton() {
 494         //int drawable = android.R.drawable.ic_menu_view;
 495         int drawable = R.drawable.ic_view;
 496         if (isPasswordVisible()) {
 497             //drawable = android.R.drawable.ic_secure;
 498             drawable = R.drawable.ic_hide;
 499         }
 500         mPasswordInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, drawable, 0);
 501     }
 502
 503     private boolean isPasswordVisible() {
 504         return ((mPasswordInput.getInputType() & InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD) == InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
 505     }
 506
 507     private void hidePasswordButton() {
 508         mPasswordInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0);
 509     }
 510
 511     private void showPassword() {
 512         mPasswordInput.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
 513         showViewPasswordButton();
 514     }
 515
 516     private void hidePassword() {
 517         mPasswordInput.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
 518         showViewPasswordButton();
 519     }
 520
 521
 522     /**
 523      * Cancels the authenticator activity
 524      *
 525      * IMPORTANT ENTRY POINT 3: Never underestimate the importance of cancellation
 526      *
 527      * This method is bound in the layout/acceoun_setup.xml resource file.
 528      *
 529      * @param view      Cancel button
 530      */
 531     public void onCancelClick(View view) {
 532         setResult(RESULT_CANCELED);     // TODO review how is this related to AccountAuthenticator (debugging)
 533         finish();
 534     }
 535
 536
 537
 538     /**
 539      * Checks the credentials of the user in the root of the ownCloud server
 540      * before creating a new local account.
 541      *
 542      * For basic authorization, a check of existence of the root folder is
 543      * performed.
 544      *
 545      * For OAuth, starts the flow to get an access token; the credentials test
 546      * is postponed until it is available.
 547      *
 548      * IMPORTANT ENTRY POINT 4
 549      *
 550      * @param view      OK button
 551      */
 552     public void onOkClick(View view) {
 553         // this check should be unnecessary
 554         if (mDiscoveredVersion == null || !mDiscoveredVersion.isVersionValid()  || mHostBaseUrl == null || mHostBaseUrl.length() == 0) {
 555             mServerStatusIcon = R.drawable.common_error;
 556             mServerStatusText = R.string.auth_wtf_reenter_URL;
 557             showServerStatus();
 558             mOkButton.setEnabled(false);
 559             Log_OC.wtf(TAG,  "The user was allowed to click 'connect' to an unchecked server!!");
 560             return;
 561         }
 562
 563         if (mOAuth2Check.isChecked()) {
 564             startOauthorization();
 565
 566         } else {
 567             checkBasicAuthorization();
 568         }
 569     }
 570
 571
 572     /**
 573      * Tests the credentials entered by the user performing a check of existence on
 574      * the root folder of the ownCloud server.
 575      */
 576     private void checkBasicAuthorization() {
 577         /// get the path to the root folder through WebDAV from the version server
 578         String webdav_path = AccountUtils.getWebdavPath(mDiscoveredVersion, false);
 579
 580         /// get basic credentials entered by user
 581         String username = mUsernameInput.getText().toString();
 582         String password = mPasswordInput.getText().toString();
 583
 584         /// be gentle with the user
 585         showDialog(DIALOG_LOGIN_PROGRESS);
 586
 587         /// test credentials accessing the root folder
 588         mAuthCheckOperation = new  ExistenceCheckOperation("", this, false);
 589         WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mHostBaseUrl + webdav_path), this);
 590         client.setBasicCredentials(username, password);
 591         mOperationThread = mAuthCheckOperation.execute(client, this, mHandler);
 592     }
 593
 594
 595     /**
 596      * Starts the OAuth 'grant type' flow to get an access token, with
 597      * a GET AUTHORIZATION request to the BUILT-IN authorization server.
 598      */
 599     private void startOauthorization() {
 600         // be gentle with the user
 601         mAuthStatusIcon = R.drawable.progress_small;
 602         mAuthStatusText = R.string.oauth_login_connection;
 603         showAuthStatus();
 604
 605         // GET AUTHORIZATION request
 606         //Uri uri = Uri.parse(getString(R.string.oauth2_url_endpoint_auth));
 607         Uri uri = Uri.parse(mOAuthAuthEndpointText.getText().toString().trim());
 608         Uri.Builder uriBuilder = uri.buildUpon();
 609         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_RESPONSE_TYPE, getString(R.string.oauth2_response_type));
 610         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_REDIRECT_URI, getString(R.string.oauth2_redirect_uri));
 611         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_CLIENT_ID, getString(R.string.oauth2_client_id));
 612         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_SCOPE, getString(R.string.oauth2_scope));
 613         //uriBuilder.appendQueryParameter(OAuth2Constants.KEY_STATE, whateverwewant);
 614         uri = uriBuilder.build();
 615         Log_OC.d(TAG, "Starting browser to view " + uri.toString());
 616         Intent i = new Intent(Intent.ACTION_VIEW, uri);
 617         startActivity(i);
 618     }
 619
 620
 621     /**
 622      * Callback method invoked when a RemoteOperation executed by this Activity finishes.
 623      *
 624      * Dispatches the operation flow to the right method.
 625      */
 626     @Override
 627     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 628
 629         if (operation instanceof OwnCloudServerCheckOperation) {
 630             onOcServerCheckFinish((OwnCloudServerCheckOperation) operation, result);
 631
 632         } else if (operation instanceof OAuth2GetAccessToken) {
 633             onGetOAuthAccessTokenFinish((OAuth2GetAccessToken)operation, result);
 634
 635         } else if (operation instanceof ExistenceCheckOperation)  {
 636             onAuthorizationCheckFinish((ExistenceCheckOperation)operation, result);
 637
 638         }
 639     }
 640
 641
 642     /**
 643      * Processes the result of the server check performed when the user finishes the enter of the
 644      * server URL.
 645      *
 646      * @param operation     Server check performed.
 647      * @param result        Result of the check.
 648      */
 649     private void onOcServerCheckFinish(OwnCloudServerCheckOperation operation, RemoteOperationResult result) {
 650         if (operation.equals(mOcServerChkOperation)) {
 651             /// save result state
 652             mServerIsChecked = true;
 653             mServerIsValid = result.isSuccess();
 654             mIsSslConn = (result.getCode() == ResultCode.OK_SSL);
 655             mOcServerChkOperation = null;
 656
 657             /// update status icon and text
 658             if (mServerIsValid) {
 659                 hideRefreshButton();
 660             } else {
 661                 showRefreshButton();
 662             }
 663             updateServerStatusIconAndText(result);
 664             showServerStatus();
 665
 666             /// very special case (TODO: move to a common place for all the remote operations)
 667             if (result.getCode() == ResultCode.SSL_RECOVERABLE_PEER_UNVERIFIED) {
 668                 mLastSslUntrustedServerResult = result;
 669                 showDialog(DIALOG_SSL_VALIDATOR);
 670             }
 671
 672             /// retrieve discovered version and normalize server URL
 673             mDiscoveredVersion = operation.getDiscoveredVersion();
 674             mHostBaseUrl = normalizeUrl(mHostUrlInput.getText().toString());
 675
 676             /// allow or not the user try to access the server
 677             mOkButton.setEnabled(mServerIsValid);
 678
 679         }   // else nothing ; only the last check operation is considered;
 680         // multiple can be triggered if the user amends a URL before a previous check can be triggered
 681     }
 682
 683
 684     private String normalizeUrl(String url) {
 685         if (url != null && url.length() > 0) {
 686             url = url.trim();
 687             if (!url.toLowerCase().startsWith("http://") &&
 688                     !url.toLowerCase().startsWith("https://")) {
 689                 if (mIsSslConn) {
 690                     url = "https://" + url;
 691                 } else {
 692                     url = "http://" + url;
 693                 }
 694             }
 695
 696             // OC-208: Add suffix remote.php/webdav to normalize (OC-34)
 697             url = trimUrlWebdav(url);
 698
 699             if (url.endsWith("/")) {
 700                 url = url.substring(0, url.length() - 1);
 701             }
 702
 703         }
 704         Log_OC.d(TAG, "URL Normalize " + url);
 705         return (url != null ? url : "");
 706     }
 707
 708
 709     private String trimUrlWebdav(String url){
 710         if(url.toLowerCase().endsWith(AccountUtils.WEBDAV_PATH_4_0)){
 711             url = url.substring(0, url.length() - AccountUtils.WEBDAV_PATH_4_0.length());
 712         } else if(url.toLowerCase().endsWith(AccountUtils.WEBDAV_PATH_2_0)){
 713             url = url.substring(0, url.length() - AccountUtils.WEBDAV_PATH_2_0.length());
 714         } else if (url.toLowerCase().endsWith(AccountUtils.WEBDAV_PATH_1_2)){
 715             url = url.substring(0, url.length() - AccountUtils.WEBDAV_PATH_1_2.length());
 716         }
 717         return (url != null ? url : "");
 718     }
 719
 720
 721     /**
 722      * Chooses the right icon and text to show to the user for the received operation result.
 723      *
 724      * @param result    Result of a remote operation performed in this activity
 725      */
 726     private void updateServerStatusIconAndText(RemoteOperationResult result) {
 727         mServerStatusIcon = R.drawable.common_error;    // the most common case in the switch below
 728
 729         switch (result.getCode()) {
 730         case OK_SSL:
 731             mServerStatusIcon = android.R.drawable.ic_secure;
 732             mServerStatusText = R.string.auth_secure_connection;
 733             break;
 734
 735         case OK_NO_SSL:
 736         case OK:
 737             if (mHostUrlInput.getText().toString().trim().toLowerCase().startsWith("http://") ) {
 738                 mServerStatusText = R.string.auth_connection_established;
 739                 mServerStatusIcon = R.drawable.ic_ok;
 740             } else {
 741                 mServerStatusText = R.string.auth_nossl_plain_ok_title;
 742                 mServerStatusIcon = android.R.drawable.ic_partial_secure;
 743             }
 744             break;
 745
 746         case NO_NETWORK_CONNECTION:
 747             mServerStatusIcon = R.drawable.no_network;
 748             mServerStatusText = R.string.auth_no_net_conn_title;
 749             break;
 750
 751         case SSL_RECOVERABLE_PEER_UNVERIFIED:
 752             mServerStatusText = R.string.auth_ssl_unverified_server_title;
 753             break;
 754         case BAD_OC_VERSION:
 755             mServerStatusText = R.string.auth_bad_oc_version_title;
 756             break;
 757         case WRONG_CONNECTION:
 758             mServerStatusText = R.string.auth_wrong_connection_title;
 759             break;
 760         case TIMEOUT:
 761             mServerStatusText = R.string.auth_timeout_title;
 762             break;
 763         case INCORRECT_ADDRESS:
 764             mServerStatusText = R.string.auth_incorrect_address_title;
 765             break;
 766         case SSL_ERROR:
 767             mServerStatusText = R.string.auth_ssl_general_error_title;
 768             break;
 769         case UNAUTHORIZED:
 770             mServerStatusText = R.string.auth_unauthorized;
 771             break;
 772         case HOST_NOT_AVAILABLE:
 773             mServerStatusText = R.string.auth_unknown_host_title;
 774             break;
 775         case INSTANCE_NOT_CONFIGURED:
 776             mServerStatusText = R.string.auth_not_configured_title;
 777             break;
 778         case FILE_NOT_FOUND:
 779             mServerStatusText = R.string.auth_incorrect_path_title;
 780             break;
 781         case OAUTH2_ERROR:
 782             mServerStatusText = R.string.auth_oauth_error;
 783             break;
 784         case OAUTH2_ERROR_ACCESS_DENIED:
 785             mServerStatusText = R.string.auth_oauth_error_access_denied;
 786             break;
 787         case UNHANDLED_HTTP_CODE:
 788         case UNKNOWN_ERROR:
 789             mServerStatusText = R.string.auth_unknown_error_title;
 790             break;
 791         default:
 792             mServerStatusText = 0;
 793             mServerStatusIcon = 0;
 794         }
 795     }
 796
 797
 798     /**
 799      * Chooses the right icon and text to show to the user for the received operation result.
 800      *
 801      * @param result    Result of a remote operation performed in this activity
 802      */
 803     private void updateAuthStatusIconAndText(RemoteOperationResult result) {
 804         mAuthStatusIcon = R.drawable.common_error;    // the most common case in the switch below
 805
 806         switch (result.getCode()) {
 807         case OK_SSL:
 808             mAuthStatusIcon = android.R.drawable.ic_secure;
 809             mAuthStatusText = R.string.auth_secure_connection;
 810             break;
 811
 812         case OK_NO_SSL:
 813         case OK:
 814             if (mHostUrlInput.getText().toString().trim().toLowerCase().startsWith("http://") ) {
 815                 mAuthStatusText = R.string.auth_connection_established;
 816                 mAuthStatusIcon = R.drawable.ic_ok;
 817             } else {
 818                 mAuthStatusText = R.string.auth_nossl_plain_ok_title;
 819                 mAuthStatusIcon = android.R.drawable.ic_partial_secure;
 820             }
 821             break;
 822
 823         case NO_NETWORK_CONNECTION:
 824             mAuthStatusIcon = R.drawable.no_network;
 825             mAuthStatusText = R.string.auth_no_net_conn_title;
 826             break;
 827
 828         case SSL_RECOVERABLE_PEER_UNVERIFIED:
 829             mAuthStatusText = R.string.auth_ssl_unverified_server_title;
 830             break;
 831         case BAD_OC_VERSION:
 832             mAuthStatusText = R.string.auth_bad_oc_version_title;
 833             break;
 834         case WRONG_CONNECTION:
 835             mAuthStatusText = R.string.auth_wrong_connection_title;
 836             break;
 837         case TIMEOUT:
 838             mAuthStatusText = R.string.auth_timeout_title;
 839             break;
 840         case INCORRECT_ADDRESS:
 841             mAuthStatusText = R.string.auth_incorrect_address_title;
 842             break;
 843         case SSL_ERROR:
 844             mAuthStatusText = R.string.auth_ssl_general_error_title;
 845             break;
 846         case UNAUTHORIZED:
 847             mAuthStatusText = R.string.auth_unauthorized;
 848             break;
 849         case HOST_NOT_AVAILABLE:
 850             mAuthStatusText = R.string.auth_unknown_host_title;
 851             break;
 852         case INSTANCE_NOT_CONFIGURED:
 853             mAuthStatusText = R.string.auth_not_configured_title;
 854             break;
 855         case FILE_NOT_FOUND:
 856             mAuthStatusText = R.string.auth_incorrect_path_title;
 857             break;
 858         case OAUTH2_ERROR:
 859             mAuthStatusText = R.string.auth_oauth_error;
 860             break;
 861         case OAUTH2_ERROR_ACCESS_DENIED:
 862             mAuthStatusText = R.string.auth_oauth_error_access_denied;
 863             break;
 864         case UNHANDLED_HTTP_CODE:
 865         case UNKNOWN_ERROR:
 866             mAuthStatusText = R.string.auth_unknown_error_title;
 867             break;
 868         default:
 869             mAuthStatusText = 0;
 870             mAuthStatusIcon = 0;
 871         }
 872     }
 873
 874
 875     /**
 876      * Processes the result of the request for and access token send
 877      * to an OAuth authorization server.
 878      *
 879      * @param operation     Operation performed requesting the access token.
 880      * @param result        Result of the operation.
 881      */
 882     private void onGetOAuthAccessTokenFinish(OAuth2GetAccessToken operation, RemoteOperationResult result) {
 883         try {
 884             dismissDialog(DIALOG_OAUTH2_LOGIN_PROGRESS);
 885         } catch (IllegalArgumentException e) {
 886             // NOTHING TO DO ; can't find out what situation that leads to the exception in this code, but user logs signal that it happens
 887         }
 888
 889         String webdav_path = AccountUtils.getWebdavPath(mDiscoveredVersion, true);
 890         if (result.isSuccess() && webdav_path != null) {
 891             /// be gentle with the user
 892             showDialog(DIALOG_LOGIN_PROGRESS);
 893
 894             /// time to test the retrieved access token on the ownCloud server
 895             mOAuthAccessToken = ((OAuth2GetAccessToken)operation).getResultTokenMap().get(OAuth2Constants.KEY_ACCESS_TOKEN);
 896             Log_OC.d(TAG, "Got ACCESS TOKEN: " + mOAuthAccessToken);
 897             mAuthCheckOperation = new ExistenceCheckOperation("", this, false);
 898             WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mHostBaseUrl + webdav_path), this);
 899             client.setBearerCredentials(mOAuthAccessToken);
 900             mAuthCheckOperation.execute(client, this, mHandler);
 901
 902         } else {
 903             updateAuthStatusIconAndText(result);
 904             showAuthStatus();
 905             Log_OC.d(TAG, "Access failed: " + result.getLogMessage());
 906         }
 907     }
 908
 909
 910     /**
 911      * Processes the result of the access check performed to try the user credentials.
 912      *
 913      * Creates a new account through the AccountManager.
 914      *
 915      * @param operation     Access check performed.
 916      * @param result        Result of the operation.
 917      */
 918     private void onAuthorizationCheckFinish(ExistenceCheckOperation operation, RemoteOperationResult result) {
 919         try {
 920             dismissDialog(DIALOG_LOGIN_PROGRESS);
 921         } catch (IllegalArgumentException e) {
 922             // NOTHING TO DO ; can't find out what situation that leads to the exception in this code, but user logs signal that it happens
 923         }
 924
 925         if (result.isSuccess()) {
 926             Log_OC.d(TAG, "Successful access - time to save the account");
 927
 928             if (mAction == ACTION_CREATE) {
 929                 createAccount();
 930
 931             } else {
 932                 updateToken();
 933             }
 934
 935             finish();
 936
 937         } else {
 938             updateAuthStatusIconAndText(result);
 939             showAuthStatus();
 940             Log_OC.d(TAG, "Access failed: " + result.getLogMessage());
 941         }
 942     }
 943
 944
 945     /**
 946      * Sets the proper response to get that the Account Authenticator that started this activity saves
 947      * a new authorization token for mAccount.
 948      */
 949     private void updateToken() {
 950         Bundle response = new Bundle();
 951         response.putString(AccountManager.KEY_ACCOUNT_NAME, mAccount.name);
 952         response.putString(AccountManager.KEY_ACCOUNT_TYPE, mAccount.type);
 953         boolean isOAuth = mOAuth2Check.isChecked();
 954         if (isOAuth) {
 955             response.putString(AccountManager.KEY_AUTHTOKEN, mOAuthAccessToken);
 956             // the next line is necessary; by now, notifications are calling directly to the AuthenticatorActivity to update, without AccountManager intervention
 957             mAccountMgr.setAuthToken(mAccount, AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN, mOAuthAccessToken);
 958         } else {
 959             response.putString(AccountManager.KEY_AUTHTOKEN, mPasswordInput.getText().toString());
 960             mAccountMgr.setPassword(mAccount, mPasswordInput.getText().toString());
 961         }
 962         setAccountAuthenticatorResult(response);
 963     }
 964
 965
 966     /**
 967      * Creates a new account through the Account Authenticator that started this activity.
 968      *
 969      * This makes the account permanent.
 970      *
 971      * TODO Decide how to name the OAuth accounts
 972      */
 973     private void createAccount() {
 974         /// create and save new ownCloud account
 975         boolean isOAuth = mOAuth2Check.isChecked();
 976
 977         Uri uri = Uri.parse(mHostBaseUrl);
 978         String username = mUsernameInput.getText().toString().trim();
 979         if (isOAuth) {
 980             username = "OAuth_user" + (new java.util.Random(System.currentTimeMillis())).nextLong();
 981         }
 982         String accountName = username + "@" + uri.getHost();
 983         if (uri.getPort() >= 0) {
 984             accountName += ":" + uri.getPort();
 985         }
 986         mAccount = new Account(accountName, AccountAuthenticator.ACCOUNT_TYPE);
 987         if (isOAuth) {
 988             mAccountMgr.addAccountExplicitly(mAccount, "", null);  // with our implementation, the password is never input in the app
 989         } else {
 990             mAccountMgr.addAccountExplicitly(mAccount, mPasswordInput.getText().toString(), null);
 991         }
 992
 993         /// add the new account as default in preferences, if there is none already
 994         Account defaultAccount = AccountUtils.getCurrentOwnCloudAccount(this);
 995         if (defaultAccount == null) {
 996             SharedPreferences.Editor editor = PreferenceManager
 997                     .getDefaultSharedPreferences(this).edit();
 998             editor.putString("select_oc_account", accountName);
 999             editor.commit();
1000         }
1001
1002         /// prepare result to return to the Authenticator
1003         //  TODO check again what the Authenticator makes with it; probably has the same effect as addAccountExplicitly, but it's not well done
1004         final Intent intent = new Intent();
1005         intent.putExtra(AccountManager.KEY_ACCOUNT_TYPE,    AccountAuthenticator.ACCOUNT_TYPE);
1006         intent.putExtra(AccountManager.KEY_ACCOUNT_NAME,    mAccount.name);
1007         if (!isOAuth)
1008             intent.putExtra(AccountManager.KEY_AUTHTOKEN,   AccountAuthenticator.ACCOUNT_TYPE); // TODO check this; not sure it's right; maybe
1009         intent.putExtra(AccountManager.KEY_USERDATA,        username);
1010         if (isOAuth) {
1011             mAccountMgr.setAuthToken(mAccount, AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN, mOAuthAccessToken);
1012         }
1013         /// add user data to the new account; TODO probably can be done in the last parameter addAccountExplicitly, or in KEY_USERDATA
1014         mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_OC_VERSION,    mDiscoveredVersion.toString());
1015         mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_OC_BASE_URL,   mHostBaseUrl);
1016         if (isOAuth)
1017             mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_SUPPORTS_OAUTH2, "TRUE");  // TODO this flag should be unnecessary
1018
1019         setAccountAuthenticatorResult(intent.getExtras());
1020         setResult(RESULT_OK, intent);
1021
1022         /// immediately request for the synchronization of the new account
1023         Bundle bundle = new Bundle();
1024         bundle.putBoolean(ContentResolver.SYNC_EXTRAS_MANUAL, true);
1025         ContentResolver.requestSync(mAccount, AccountAuthenticator.AUTHORITY, bundle);
1026     }
1027
1028
1029     /**
1030      * {@inheritDoc}
1031      *
1032      * Necessary to update the contents of the SSL Dialog
1033      *
1034      * TODO move to some common place for all possible untrusted SSL failures
1035      */
1036     @Override
1037     protected void onPrepareDialog(int id, Dialog dialog, Bundle args) {
1038         switch (id) {
1039         case DIALOG_LOGIN_PROGRESS:
1040         case DIALOG_CERT_NOT_SAVED:
1041         case DIALOG_OAUTH2_LOGIN_PROGRESS:
1042             break;
1043         case DIALOG_SSL_VALIDATOR: {
1044             ((SslValidatorDialog)dialog).updateResult(mLastSslUntrustedServerResult);
1045             break;
1046         }
1047         default:
1048             Log_OC.e(TAG, "Incorrect dialog called with id = " + id);
1049         }
1050     }
1051
1052
1053     /**
1054      * {@inheritDoc}
1055      */
1056     @Override
1057     protected Dialog onCreateDialog(int id) {
1058         Dialog dialog = null;
1059         switch (id) {
1060         case DIALOG_LOGIN_PROGRESS: {
1061             /// simple progress dialog
1062             ProgressDialog working_dialog = new ProgressDialog(this);
1063             working_dialog.setMessage(getResources().getString(R.string.auth_trying_to_login));
1064             working_dialog.setIndeterminate(true);
1065             working_dialog.setCancelable(true);
1066             working_dialog
1067             .setOnCancelListener(new DialogInterface.OnCancelListener() {
1068                 @Override
1069                 public void onCancel(DialogInterface dialog) {
1070                     /// TODO study if this is enough
1071                     Log_OC.i(TAG, "Login canceled");
1072                     if (mOperationThread != null) {
1073                         mOperationThread.interrupt();
1074                         finish();
1075                     }
1076                 }
1077             });
1078             dialog = working_dialog;
1079             break;
1080         }
1081         case DIALOG_OAUTH2_LOGIN_PROGRESS: {
1082             ProgressDialog working_dialog = new ProgressDialog(this);
1083             working_dialog.setMessage(String.format("Getting authorization"));
1084             working_dialog.setIndeterminate(true);
1085             working_dialog.setCancelable(true);
1086             working_dialog
1087             .setOnCancelListener(new DialogInterface.OnCancelListener() {
1088                 @Override
1089                 public void onCancel(DialogInterface dialog) {
1090                     Log_OC.i(TAG, "Login canceled");
1091                     finish();
1092                 }
1093             });
1094             dialog = working_dialog;
1095             break;
1096         }
1097         case DIALOG_SSL_VALIDATOR: {
1098             /// TODO start to use new dialog interface, at least for this (it is a FragmentDialog already)
1099             dialog = SslValidatorDialog.newInstance(this, mLastSslUntrustedServerResult, this);
1100             break;
1101         }
1102         case DIALOG_CERT_NOT_SAVED: {
1103             AlertDialog.Builder builder = new AlertDialog.Builder(this);
1104             builder.setMessage(getResources().getString(R.string.ssl_validator_not_saved));
1105             builder.setCancelable(false);
1106             builder.setPositiveButton(R.string.common_ok, new DialogInterface.OnClickListener() {
1107                 @Override
1108                 public void onClick(DialogInterface dialog, int which) {
1109                     dialog.dismiss();
1110                 };
1111             });
1112             dialog = builder.create();
1113             break;
1114         }
1115         default:
1116             Log_OC.e(TAG, "Incorrect dialog called with id = " + id);
1117         }
1118         return dialog;
1119     }
1120
1121
1122     /**
1123      * Starts and activity to open the 'new account' page in the ownCloud web site
1124      *
1125      * @param view      'Account register' button
1126      */
1127     public void onRegisterClick(View view) {
1128         Intent register = new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.url_account_register)));
1129         setResult(RESULT_CANCELED);
1130         startActivity(register);
1131     }
1132
1133
1134     /**
1135      * Updates the content and visibility state of the icon and text associated
1136      * to the last check on the ownCloud server.
1137      */
1138     private void showServerStatus() {
1139         TextView tv = (TextView) findViewById(R.id.server_status_text);
1140
1141         if (mServerStatusIcon == 0 && mServerStatusText == 0) {
1142             tv.setVisibility(View.INVISIBLE);
1143
1144         } else {
1145             tv.setText(mServerStatusText);
1146             tv.setCompoundDrawablesWithIntrinsicBounds(mServerStatusIcon, 0, 0, 0);
1147             tv.setVisibility(View.VISIBLE);
1148         }
1149
1150     }
1151
1152
1153     /**
1154      * Updates the content and visibility state of the icon and text associated
1155      * to the interactions with the OAuth authorization server.
1156      */
1157     private void showAuthStatus() {
1158         if (mAuthStatusIcon == 0 && mAuthStatusText == 0) {
1159             mAuthStatusLayout.setVisibility(View.INVISIBLE);
1160
1161         } else {
1162             mAuthStatusLayout.setText(mAuthStatusText);
1163             mAuthStatusLayout.setCompoundDrawablesWithIntrinsicBounds(mAuthStatusIcon, 0, 0, 0);
1164             mAuthStatusLayout.setVisibility(View.VISIBLE);
1165         }
1166     }
1167
1168
1169     private void showRefreshButton() {
1170         mHostUrlInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ic_action_refresh_black, 0);
1171         mRefreshButtonEnabled = true;
1172     }
1173
1174     private void hideRefreshButton() {
1175         mHostUrlInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0);
1176         mRefreshButtonEnabled = false;
1177     }
1178
1179     /**
1180      * Called when the refresh button in the input field for ownCloud host is clicked.
1181      *
1182      * Performs a new check on the URL in the input field.
1183      *
1184      * @param view      Refresh 'button'
1185      */
1186     public void onRefreshClick() {
1187         checkOcServer();
1188     }
1189
1190
1191     /**
1192      * Called when the eye icon in the password field is clicked.
1193      *
1194      * Toggles the visibility of the password in the field.
1195      */
1196     public void onViewPasswordClick() {
1197         int selectionStart = mPasswordInput.getSelectionStart();
1198         int selectionEnd = mPasswordInput.getSelectionEnd();
1199         if (isPasswordVisible()) {
1200             hidePassword();
1201         } else {
1202             showPassword();
1203         }
1204         mPasswordInput.setSelection(selectionStart, selectionEnd);
1205     }
1206
1207
1208     /**
1209      * Called when the checkbox for OAuth authorization is clicked.
1210      *
1211      * Hides or shows the input fields for user & password.
1212      *
1213      * @param view      'View password' 'button'
1214      */
1215     public void onCheckClick(View view) {
1216         CheckBox oAuth2Check = (CheckBox)view;
1217         changeViewByOAuth2Check(oAuth2Check.isChecked());
1218
1219     }
1220
1221     /**
1222      * Changes the visibility of input elements depending upon the kind of authorization
1223      * chosen by the user: basic or OAuth
1224      *
1225      * @param checked       'True' when OAuth is selected.
1226      */
1227     public void changeViewByOAuth2Check(Boolean checked) {
1228
1229         if (checked) {
1230             mOAuthAuthEndpointText.setVisibility(View.VISIBLE);
1231             mOAuthTokenEndpointText.setVisibility(View.VISIBLE);
1232             mUsernameInput.setVisibility(View.GONE);
1233             mPasswordInput.setVisibility(View.GONE);
1234         } else {
1235             mOAuthAuthEndpointText.setVisibility(View.GONE);
1236             mOAuthTokenEndpointText.setVisibility(View.GONE);
1237             mUsernameInput.setVisibility(View.VISIBLE);
1238             mPasswordInput.setVisibility(View.VISIBLE);
1239         }
1240
1241     }
1242
1243     /**
1244      * Called from SslValidatorDialog when a new server certificate was correctly saved.
1245      */
1246     public void onSavedCertificate() {
1247         mOperationThread = mOcServerChkOperation.retry(this, mHandler);
1248     }
1249
1250     /**
1251      * Called from SslValidatorDialog when a new server certificate could not be saved
1252      * when the user requested it.
1253      */
1254     @Override
1255     public void onFailedSavingCertificate() {
1256         showDialog(DIALOG_CERT_NOT_SAVED);
1257     }
1258
1259
1260     /**
1261      *  Called when the 'action' button in an IME is pressed ('enter' in software keyboard).
1262      *
1263      *  Used to trigger the authorization check when the user presses 'enter' after writing the password.
1264      */
1265     @Override
1266     public boolean onEditorAction(TextView inputField, int actionId, KeyEvent event) {
1267         if (inputField != null && inputField.equals(mPasswordInput) &&
1268                 actionId == EditorInfo.IME_ACTION_DONE) {
1269             if (mOkButton.isEnabled()) {
1270                 mOkButton.performClick();
1271             }
1272         }
1273         return false;   // always return false to grant that the software keyboard is hidden anyway
1274     }
1275
1276
1277     private abstract static class RightDrawableOnTouchListener implements OnTouchListener  {
1278
1279         private int fuzz = 75;
1280
1281         /**
1282          * {@inheritDoc}
1283          */
1284         @Override
1285         public boolean onTouch(View view, MotionEvent event) {
1286             Drawable rightDrawable = null;
1287             if (view instanceof TextView) {
1288                 Drawable[] drawables = ((TextView)view).getCompoundDrawables();
1289                 if (drawables.length > 2) {
1290                     rightDrawable = drawables[2];
1291                 }
1292             }
1293             if (rightDrawable != null) {
1294                 final int x = (int) event.getX();
1295                 final int y = (int) event.getY();
1296                 final Rect bounds = rightDrawable.getBounds();
1297                 if (x >= (view.getRight() - bounds.width() - fuzz) && x <= (view.getRight() - view.getPaddingRight() + fuzz)
1298                     && y >= (view.getPaddingTop() - fuzz) && y <= (view.getHeight() - view.getPaddingBottom()) + fuzz) {
1299
1300                     return onDrawableTouch(event);
1301                 }
1302             }
1303             return false;
1304         }
1305
1306         public abstract boolean onDrawableTouch(final MotionEvent event);
1307     }
1308
1309 }