michael@0: /**
michael@0:  * Copyright (c) 2012-2013, Gerald Garcia
michael@8:  *
michael@0:  * This file is part of Andoid Caldav Sync Adapter Free.
michael@0:  *
michael@0:  * Andoid Caldav Sync Adapter Free is free software: you can redistribute 
michael@0:  * it and/or modify it under the terms of the GNU General Public License 
michael@0:  * as published by the Free Software Foundation, either version 3 of the 
michael@0:  * License, or at your option any later version.
michael@0:  *
michael@0:  * Andoid Caldav Sync Adapter Free is distributed in the hope that 
michael@0:  * it will be useful, but WITHOUT ANY WARRANTY; without even the implied 
michael@0:  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
michael@0:  * GNU General Public License for more details.
michael@0:  *
michael@0:  * You should have received a copy of the GNU General Public License
michael@0:  * along with Andoid Caldav Sync Adapter Free.  
michael@0:  * If not, see <http://www.gnu.org/licenses/>.
michael@8:  *
michael@0:  */
michael@0: 
michael@0: package org.gege.caldavsyncadapter.authenticator;
michael@0: 
michael@0: import android.accounts.Account;
michael@0: import android.accounts.AccountManager;
michael@0: import android.animation.Animator;
michael@0: import android.animation.AnimatorListenerAdapter;
michael@0: import android.annotation.TargetApi;
michael@0: import android.app.Activity;
michael@0: import android.content.Context;
michael@0: import android.content.pm.PackageManager.NameNotFoundException;
michael@0: import android.os.AsyncTask;
michael@0: import android.os.Build;
michael@0: import android.os.Bundle;
michael@8: import android.text.Editable;
michael@0: import android.text.TextUtils;
michael@8: import android.text.TextWatcher;
michael@0: import android.util.Log;
michael@0: import android.view.KeyEvent;
michael@0: import android.view.Menu;
michael@0: import android.view.View;
michael@0: import android.view.inputmethod.EditorInfo;
michael@8: import android.widget.CheckBox;
michael@0: import android.widget.EditText;
michael@0: import android.widget.TextView;
michael@0: import android.widget.Toast;
michael@0: 
michael@8: import org.apache.http.conn.HttpHostConnectException;
michael@8: import org.gege.caldavsyncadapter.Constants;
michael@8: import org.gege.caldavsyncadapter.R;
michael@8: import org.gege.caldavsyncadapter.caldav.CaldavFacade;
michael@8: import org.gege.caldavsyncadapter.caldav.CaldavFacade.TestConnectionResult;
michael@8: import org.xml.sax.SAXException;
michael@8: 
michael@8: import java.io.IOException;
michael@8: import java.io.UnsupportedEncodingException;
michael@8: import java.net.MalformedURLException;
michael@8: import java.net.URISyntaxException;
michael@8: import java.util.Locale;
michael@8: 
michael@8: import javax.xml.parsers.ParserConfigurationException;
michael@8: 
michael@0: /**
michael@0:  * Activity which displays a login screen to the user, offering registration as
michael@0:  * well.
michael@0:  */
michael@0: public class AuthenticatorActivity extends Activity {
michael@0: 
michael@8:     private static final String TAG = "AuthenticatorActivity";
michael@0: 
michael@8:     private static final String ACCOUNT_TYPE = "org.gege.caldavsyncadapter.account";
michael@0: 
michael@8:     public static final String USER_DATA_URL_KEY = "USER_DATA_URL_KEY";
michael@8:     public static final String USER_DATA_USERNAME = "USER_DATA_USERNAME";
michael@8:     public static final String USER_DATA_VERSION = "USER_DATA_VERSION";
michael@8:     public static final String CURRENT_USER_DATA_VERSION = "1";
michael@0: 
michael@8:     public static final String ACCOUNT_NAME_SPLITTER = "@";
michael@0: 
michael@8:     /**
michael@8:      * The default email to populate the email field with.
michael@8:      */
michael@8:     public static final String EXTRA_EMAIL = "com.example.android.authenticatordemo.extra.EMAIL";
michael@0: 
michael@8:     /**
michael@8:      * Keep track of the login task to ensure we can cancel it if requested.
michael@8:      */
michael@8:     private UserLoginTask mAuthTask = null;
michael@0: 
michael@8:     // Values for email and password at the time of the login attempt.
michael@8:     private String mUser;
michael@8:     private String mPassword;
michael@8:     private String mTrustAll;
michael@8:     private Context mContext;
michael@0: 
michael@8:     // UI references.
michael@8:     private EditText mUserView;
michael@8:     private EditText mPasswordView;
michael@8:     private View mLoginFormView;
michael@8:     private View mLoginStatusView;
michael@8:     private TextView mLoginStatusMessageView;
michael@8:     private CheckBox mTrustCheckBox;
michael@0: 
michael@8:     private AccountManager mAccountManager;
michael@0: 
michael@8:     private String mURL;
michael@8:     private EditText mURLView;
michael@0: 
michael@8:     private String mAccountname;
michael@8:     private EditText mAccountnameView;
michael@0: 
michael@8:     public AuthenticatorActivity() {
michael@8:         super();
michael@0: 
michael@8:     }
michael@0: 
michael@8:     @Override
michael@8:     protected void onCreate(Bundle savedInstanceState) {
michael@8:         super.onCreate(savedInstanceState);
michael@0: 
michael@8:         mAccountManager = AccountManager.get(this);
michael@0: 
michael@8:         setContentView(R.layout.activity_authenticator);
michael@0: 
michael@8:         // Set up the login form.
michael@8:         mUser = getIntent().getStringExtra(EXTRA_EMAIL);
michael@8:         mUserView = (EditText) findViewById(R.id.user);
michael@8:         mUserView.setText(mUser);
michael@0: 
michael@8:         mContext = getBaseContext();
michael@0: 
michael@8:         mPasswordView = (EditText) findViewById(R.id.password);
michael@8:         mPasswordView
michael@8:                 .setOnEditorActionListener(new TextView.OnEditorActionListener() {
michael@8:                     @Override
michael@8:                     public boolean onEditorAction(TextView textView, int id,
michael@8:                                                   KeyEvent keyEvent) {
michael@8:                         if (id == R.id.login || id == EditorInfo.IME_NULL) {
michael@8:                             attemptLogin();
michael@8:                             return true;
michael@8:                         }
michael@8:                         return false;
michael@8:                     }
michael@8:                 });
michael@0: 
michael@0: 
michael@8:         mURLView = (EditText) findViewById(R.id.url);
michael@8:         // if the URL start with "https" show the option to disable SSL host verification
michael@8:         mURLView.addTextChangedListener(new TextWatcher() {
michael@8:             @Override
michael@8:             public void onTextChanged(CharSequence s, int start, int before, int count) {
michael@8:                 String url = ((EditText) findViewById(R.id.url)).getText().toString();
michael@8:                 int visible = url.toLowerCase(Locale.getDefault())
michael@8:                         .startsWith("https") ? View.VISIBLE : View.GONE;
michael@8:                 ((CheckBox) findViewById(R.id.trustall)).setVisibility(visible);
michael@8:             }
michael@0: 
michael@8:             @Override
michael@8:             public void beforeTextChanged(CharSequence s, int start, int count,
michael@8:                                           int after) {
michael@8:             }
michael@0: 
michael@8:             @Override
michael@8:             public void afterTextChanged(Editable s) {
michael@8:             }
michael@8:         });
michael@0: 
michael@8:         mAccountnameView = (EditText) findViewById(R.id.accountname);
michael@0: 
michael@8:         mLoginFormView = findViewById(R.id.login_form);
michael@8:         mLoginStatusView = findViewById(R.id.login_status);
michael@8:         mLoginStatusMessageView = (TextView) findViewById(R.id.login_status_message);
michael@0: 
michael@8:         findViewById(R.id.sign_in_button).setOnClickListener(
michael@8:                 new View.OnClickListener() {
michael@8:                     @Override
michael@8:                     public void onClick(View view) {
michael@8:                         attemptLogin();
michael@8:                     }
michael@8:                 }
michael@8:         );
michael@0: 
michael@8:         mTrustCheckBox = (CheckBox) findViewById(R.id.trustall);
michael@0: 
michael@0: 
michael@8:     }
michael@0: 
michael@8:     @Override
michael@8:     public boolean onCreateOptionsMenu(Menu menu) {
michael@8:         super.onCreateOptionsMenu(menu);
michael@8:         return true;
michael@8:     }
michael@0: 
michael@8:     /**
michael@8:      * Attempts to sign in or register the account specified by the login form.
michael@8:      * If there are form errors (invalid email, missing fields, etc.), the
michael@8:      * errors are presented and no actual login attempt is made.
michael@8:      */
michael@8:     public void attemptLogin() {
michael@8:         if (mAuthTask != null) {
michael@8:             return;
michael@8:         }
michael@0: 
michael@8:         // Reset errors.
michael@8:         mUserView.setError(null);
michael@8:         mPasswordView.setError(null);
michael@8: 
michael@8:         // Store values at the time of the login attempt.
michael@8:         mUser = mUserView.getText().toString();
michael@8:         mPassword = mPasswordView.getText().toString();
michael@8:         mURL = mURLView.getText().toString();
michael@8:         mAccountname = mAccountnameView.getText().toString();
michael@8:         mTrustAll = (mTrustCheckBox.isChecked() ? "false" : "true");
michael@8:         boolean cancel = false;
michael@8:         View focusView = null;
michael@8: 
michael@8:         if (!mAccountname.equals("")) {
michael@8:             Account TestAccount = new Account(mAccountname, ACCOUNT_TYPE);
michael@8:             String TestUrl = mAccountManager.getUserData(TestAccount, AuthenticatorActivity.USER_DATA_URL_KEY);
michael@8:             if (TestUrl != null) {
michael@8:                 mAccountnameView.setError(getString(R.string.error_account_already_in_use));
michael@8:                 focusView = mAccountnameView;
michael@8:                 cancel = true;
michael@8:             }
michael@8:         }
michael@8: 
michael@8:         // Check for a valid password.
michael@8:         if (TextUtils.isEmpty(mPassword)) {
michael@8:             mPasswordView.setError(getString(R.string.error_field_required));
michael@8:             focusView = mPasswordView;
michael@8:             cancel = true;
michael@8:         }
michael@8: 
michael@8:         // Check for a valid email address.
michael@8:         if (TextUtils.isEmpty(mUser)) {
michael@8:             mUserView.setError(getString(R.string.error_field_required));
michael@8:             focusView = mUserView;
michael@8:             cancel = true;
michael@8:         }
michael@8:         //else if (!mUser.contains("@")) {
michael@8:         //	mUserView.setError(getString(R.string.error_invalid_email));
michael@8:         //	focusView = mUserView;
michael@8:         //	cancel = true;
michael@8:         //}
michael@8: 
michael@8:         if (cancel) {
michael@8:             // There was an error; don't attempt login and focus the first
michael@8:             // form field with an error.
michael@8:             focusView.requestFocus();
michael@8:         } else {
michael@8:             // Show a progress spinner, and kick off a background task to
michael@8:             // perform the user login attempt.
michael@8:             mLoginStatusMessageView.setText(R.string.login_progress_signing_in);
michael@8:             showProgress(true);
michael@8:             mAuthTask = new UserLoginTask();
michael@8:             mAuthTask.execute((Void) null);
michael@8:         }
michael@8:     }
michael@8: 
michael@8:     /**
michael@8:      * Shows the progress UI and hides the login form.
michael@8:      */
michael@8:     @TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
michael@8:     private void showProgress(final boolean show) {
michael@8:         // On Honeycomb MR2 we have the ViewPropertyAnimator APIs, which allow
michael@8:         // for very easy animations. If available, use these APIs to fade-in
michael@8:         // the progress spinner.
michael@8:         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
michael@8:             int shortAnimTime = getResources().getInteger(
michael@8:                     android.R.integer.config_shortAnimTime);
michael@8: 
michael@8:             mLoginStatusView.setVisibility(View.VISIBLE);
michael@8:             mLoginStatusView.animate().setDuration(shortAnimTime)
michael@8:                     .alpha(show ? 1 : 0)
michael@8:                     .setListener(new AnimatorListenerAdapter() {
michael@8:                         @Override
michael@8:                         public void onAnimationEnd(Animator animation) {
michael@8:                             mLoginStatusView.setVisibility(show ? View.VISIBLE
michael@8:                                     : View.GONE);
michael@8:                         }
michael@8:                     });
michael@8: 
michael@8:             mLoginFormView.setVisibility(View.VISIBLE);
michael@8:             mLoginFormView.animate().setDuration(shortAnimTime)
michael@8:                     .alpha(show ? 0 : 1)
michael@8:                     .setListener(new AnimatorListenerAdapter() {
michael@8:                         @Override
michael@8:                         public void onAnimationEnd(Animator animation) {
michael@8:                             mLoginFormView.setVisibility(show ? View.GONE
michael@8:                                     : View.VISIBLE);
michael@8:                         }
michael@8:                     });
michael@8:         } else {
michael@8:             // The ViewPropertyAnimator APIs are not available, so simply show
michael@8:             // and hide the relevant UI components.
michael@8:             mLoginStatusView.setVisibility(show ? View.VISIBLE : View.GONE);
michael@8:             mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE);
michael@8:         }
michael@8:     }
michael@8: 
michael@8: 
michael@8:     protected enum LoginResult {
michael@8:         MalformedURLException,
michael@8:         GeneralSecurityException,
michael@8:         UnkonwnException,
michael@8:         WrongCredentials,
michael@8:         InvalidResponse,
michael@8:         WrongUrl,
michael@8:         ConnectionRefused,
michael@8:         Success_Calendar,
michael@8:         Success_Collection,
michael@8:         UNTRUSTED_CERT,
michael@8:         Account_Already_In_Use
michael@8:     }
michael@8: 
michael@8: 
michael@8:     /**
michael@8:      * Represents an asynchronous login/registration task used to authenticate
michael@8:      * the user.
michael@8:      */
michael@8:     public class UserLoginTask extends AsyncTask<Void, Void, LoginResult> {
michael@8: 
michael@8:         @Override
michael@8:         protected LoginResult doInBackground(Void... params) {
michael@8: 
michael@8:             TestConnectionResult result = null;
michael@8: 
michael@8:             try {
michael@8:                 CaldavFacade facade = new CaldavFacade(mUser, mPassword, mURL, mTrustAll);
michael@8:                 String version = "";
michael@8:                 try {
michael@8:                     version = mContext.getPackageManager()
michael@8:                             .getPackageInfo(mContext.getPackageName(), 0).versionName;
michael@8:                 } catch (NameNotFoundException e) {
michael@8:                     version = "unknown";
michael@8:                     e.printStackTrace();
michael@8:                 }
michael@8:                 facade.setVersion(version);
michael@8:                 result = facade.testConnection();
michael@8:                 Log.i(TAG, "testConnection status=" + result);
michael@8:             } catch (HttpHostConnectException e) {
michael@8:                 Log.w(TAG, "testConnection", e);
michael@8:                 return LoginResult.ConnectionRefused;
michael@8:             } catch (MalformedURLException e) {
michael@8:                 Log.w(TAG, "testConnection", e);
michael@8:                 return LoginResult.MalformedURLException;
michael@8:             } catch (UnsupportedEncodingException e) {
michael@8:                 Log.w(TAG, "testConnection", e);
michael@8:                 return LoginResult.UnkonwnException;
michael@8:             } catch (ParserConfigurationException e) {
michael@8:                 Log.w(TAG, "testConnection", e);
michael@8:                 return LoginResult.UnkonwnException;
michael@8:             } catch (SAXException e) {
michael@8:                 Log.w(TAG, "testConnection", e);
michael@8:                 return LoginResult.InvalidResponse;
michael@8:             } catch (IOException e) {
michael@8:                 Log.w(TAG, "testConnection", e);
michael@8:                 return LoginResult.UnkonwnException;
michael@8:             } catch (URISyntaxException e) {
michael@8:                 Log.w(TAG, "testConnection", e);
michael@8:                 return LoginResult.MalformedURLException;
michael@8:             }
michael@8: 
michael@8:             if (result == null) {
michael@8:                 return LoginResult.UnkonwnException;
michael@8:             }
michael@8: 
michael@8:             switch (result) {
michael@8: 
michael@8:                 case SSL_ERROR:
michael@8:                     return LoginResult.UNTRUSTED_CERT;
michael@8:                 case SUCCESS:
michael@8:                     boolean OldAccount = false;
michael@8:                     LoginResult Result = LoginResult.Success_Calendar;
michael@8: 
michael@8:                     if (OldAccount) {
michael@8:                         final Account account = new Account(mUser, ACCOUNT_TYPE);
michael@8:                         if (mAccountManager.addAccountExplicitly(account, mPassword, null)) {
michael@8:                             Log.v(TAG, "new account created");
michael@8:                             mAccountManager.setUserData(account, USER_DATA_URL_KEY, mURL);
michael@8:                         } else {
michael@8:                             Log.v(TAG, "no new account created");
michael@8:                             Result = LoginResult.Account_Already_In_Use;
michael@8:                         }
michael@8:                     } else {
michael@8:                         final Account account;
michael@8:                         if (mAccountname.equals("")) {
michael@8:                             account = new Account(mUser + ACCOUNT_NAME_SPLITTER + mURL, ACCOUNT_TYPE);
michael@8:                         } else {
michael@8:                             account = new Account(mAccountname, ACCOUNT_TYPE);
michael@8:                         }
michael@8:                         if (mAccountManager.addAccountExplicitly(account, mPassword, null)) {
michael@8:                             Log.v(TAG, "new account created");
michael@8:                             mAccountManager.setUserData(account, USER_DATA_URL_KEY, mURL);
michael@8:                             mAccountManager.setUserData(account, USER_DATA_USERNAME, mUser);
michael@8:                             mAccountManager.setUserData(account, USER_DATA_VERSION, CURRENT_USER_DATA_VERSION);
michael@8:                             mAccountManager.setUserData(account, Constants.USER_DATA_TRUST_ALL_KEY, mTrustAll);
michael@8:                         } else {
michael@8:                             Log.v(TAG, "no new account created");
michael@8:                             Result = LoginResult.Account_Already_In_Use;
michael@8:                         }
michael@8:                     }
michael@8: 
michael@8:                     return Result;
michael@8: 
michael@8:                 case WRONG_CREDENTIAL:
michael@8:                     return LoginResult.WrongCredentials;
michael@8: 
michael@8:                 case WRONG_SERVER_STATUS:
michael@8:                     return LoginResult.InvalidResponse;
michael@8: 
michael@8:                 case WRONG_URL:
michael@8:                     return LoginResult.WrongUrl;
michael@8: 
michael@8:                 case WRONG_ANSWER:
michael@8:                     return LoginResult.InvalidResponse;
michael@8: 
michael@8:                 default:
michael@8:                     return LoginResult.UnkonwnException;
michael@8: 
michael@8:             }
michael@8: 
michael@8:         }
michael@8: 
michael@8: 
michael@8:         @Override
michael@8:         protected void onPostExecute(final LoginResult result) {
michael@8:             mAuthTask = null;
michael@8:             showProgress(false);
michael@8: 
michael@8:             int duration = Toast.LENGTH_SHORT;
michael@8:             Toast toast = null;
michael@8: 
michael@8:             switch (result) {
michael@8:                 case Success_Calendar:
michael@8:                     toast = Toast.makeText(getApplicationContext(), R.string.success_calendar, duration);
michael@8:                     toast.show();
michael@8:                     finish();
michael@8:                     break;
michael@8: 
michael@8:                 case Success_Collection:
michael@8:                     toast = Toast.makeText(getApplicationContext(), R.string.success_collection, duration);
michael@8:                     toast.show();
michael@8:                     finish();
michael@8:                     break;
michael@8: 
michael@8:                 case MalformedURLException:
michael@8: 
michael@8:                     toast = Toast.makeText(getApplicationContext(), R.string.error_incorrect_url_format, duration);
michael@8:                     toast.show();
michael@8:                     mURLView.setError(getString(R.string.error_incorrect_url_format));
michael@8:                     mURLView.requestFocus();
michael@8:                     break;
michael@8:                 case InvalidResponse:
michael@8:                     toast = Toast.makeText(getApplicationContext(), R.string.error_invalid_server_answer, duration);
michael@8:                     toast.show();
michael@8:                     mURLView.setError(getString(R.string.error_invalid_server_answer));
michael@8:                     mURLView.requestFocus();
michael@8:                     break;
michael@8:                 case WrongUrl:
michael@8:                     toast = Toast.makeText(getApplicationContext(), R.string.error_wrong_url, duration);
michael@8:                     toast.show();
michael@8:                     mURLView.setError(getString(R.string.error_wrong_url));
michael@8:                     mURLView.requestFocus();
michael@8:                     break;
michael@8: 
michael@8:                 case GeneralSecurityException:
michael@8:                     break;
michael@8:                 case UnkonwnException:
michael@8:                     break;
michael@8:                 case WrongCredentials:
michael@8:                     mPasswordView.setError(getString(R.string.error_incorrect_password));
michael@8:                     mPasswordView.requestFocus();
michael@8:                     break;
michael@8: 
michael@8:                 case ConnectionRefused:
michael@8:                     toast = Toast.makeText(getApplicationContext(), R.string.error_connection_refused, duration);
michael@8:                     toast.show();
michael@8:                     mURLView.setError(getString(R.string.error_connection_refused));
michael@8:                     mURLView.requestFocus();
michael@8:                     break;
michael@8:                 case UNTRUSTED_CERT:
michael@8:                     toast = Toast.makeText(getApplicationContext(), getString(R.string.error_untrusted_certificate), duration);
michael@8:                     toast.show();
michael@8:                     mURLView.setError(getString(R.string.error_ssl));
michael@8:                     mURLView.requestFocus();
michael@8:                     break;
michael@8:                 case Account_Already_In_Use:
michael@8:                     toast = Toast.makeText(getApplicationContext(), R.string.error_account_already_in_use, duration);
michael@8:                     toast.show();
michael@8:                     mURLView.setError(getString(R.string.error_account_already_in_use));
michael@8:                     mURLView.requestFocus();
michael@8:                     break;
michael@8:                 default:
michael@8:                     toast = Toast.makeText(getApplicationContext(), R.string.error_unkown_error, duration);
michael@8:                     toast.show();
michael@8:                     mURLView.setError(getString(R.string.error_unkown_error));
michael@8:                     mURLView.requestFocus();
michael@8:                     break;
michael@8:             }
michael@8: 
michael@8: 
michael@8:         }
michael@8: 
michael@8:         @Override
michael@8:         protected void onCancelled() {
michael@8:             mAuthTask = null;
michael@8:             showProgress(false);
michael@8:         }
michael@8:     }
michael@8: }