LoginActivity.java :  » Chat-Messenger » geochat-android » org » instedd » geochat » Android Open Source

package org.instedd.geochat;

import org.instedd.geochat.api.GeoChatApi;
import org.instedd.geochat.api.GeoChatApiException;
import org.instedd.geochat.api.IGeoChatApi;
import org.instedd.geochat.api.RestClient;
import org.instedd.geochat.map.LocationTracker;
import org.instedd.geochat.sync.Synchronizer;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class LoginActivity extends Activity {
  
  public final static String EXTRA_WRONG_CREDENTIALS = "WrongCredentials";
  
  private final static int DIALOG_LOGGING_IN = 1;
  private final static int DIALOG_WRONG_CREDENTIALS = 2;
  private final static int DIALOG_UNKNOWN_ERROR = 3;
  
  private final Handler handler = new Handler();
  private ProgressDialog progressDialog;
  private boolean wrongCredentials;
  
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.login);
      
      receiveLocationUpdates();
      
      Intent intent = getIntent();
      wrongCredentials = intent != null && intent.getBooleanExtra(EXTRA_WRONG_CREDENTIALS, false);
      
      final GeoChatSettings settings = new GeoChatSettings(this);
      final String existingUser = settings.getUser();
      final String existingPassword = settings.getPassword();
      
      final EditText uiUser = (EditText) findViewById(R.id.user);
      final EditText uiPassword = (EditText) findViewById(R.id.password);
      final Button uiLogin = (Button) findViewById(R.id.login_button); 
      
      uiUser.setText(existingUser);
      uiPassword.setText(existingPassword);
      
      uiLogin.setOnClickListener(new OnClickListener() {
      public void onClick(View v) {
        new Thread() {
          public void run() {
            handler.post(new Runnable() {
              public void run() {
                showDialog(DIALOG_LOGGING_IN);
                uiLogin.setEnabled(false);
              }
            });
            
            String user = uiUser.getText().toString();
            String password = uiPassword.getText().toString();
            
            boolean userChanged = user != null && !user.equals(existingUser);
            boolean passwordChanged = password != null && !password.equals(existingPassword);
            boolean credentialsAreValid = true;
            
            try {
              if (userChanged || passwordChanged || wrongCredentials) {
                IGeoChatApi api = new GeoChatApi(new RestClient(), user, password);
                credentialsAreValid = api.credentialsAreValid();
              }
              
              if (credentialsAreValid) {
                settings.setUserAndPassword(user, password);
                if (userChanged) {
                  resync();
                }
                Actions.home(LoginActivity.this);
              } else {
                handler.post(new Runnable() {
                  public void run() {
                    uiLogin.setEnabled(true);
                    dismissDialog(DIALOG_LOGGING_IN);
                    showDialog(DIALOG_WRONG_CREDENTIALS);
                  }                  
                });
              }
            } catch (GeoChatApiException e) {
              handler.post(new Runnable() {
                public void run() {
                  uiLogin.setEnabled(true);
                  dismissDialog(DIALOG_LOGGING_IN);
                  showDialog(DIALOG_UNKNOWN_ERROR);
                }
              });
            }
          };
        }.start();
      }      
    });
  }
  
  private void receiveLocationUpdates() {
    LocationTracker.getInstance(this);
  }

  @Override
  protected Dialog onCreateDialog(int id) {
    if (id == DIALOG_LOGGING_IN) {
      String message = getResources().getString(R.string.logging_in_to_geochat);
      
      progressDialog = new ProgressDialog(this);
      progressDialog.setTitle(message);
      progressDialog.setMessage(message);
      progressDialog.setCancelable(false);
      return progressDialog;  
    } else {
      int messageResourceId = id == DIALOG_WRONG_CREDENTIALS ? R.string.invalid_credentials : R.string.cannott_login_maybe_no_connection; 

      AlertDialog.Builder builder = new AlertDialog.Builder(this);
      builder.setMessage(messageResourceId)
        .setTitle(R.string.cannot_login_to_geochat)
        .setCancelable(true)
        .setNeutralButton(android.R.string.ok, null);
      return builder.create();
    }
  }
  
  @Override
  public boolean onKeyDown(int keyCode, KeyEvent event) {
    // This is to go HOME when the user presses BACK
    if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
          moveTaskToBack(true);
          return true;
      }
      return super.onKeyDown(keyCode, event);
  }
  
  private void resync() throws GeoChatApiException {
//    handler.post(new Runnable() {
//      public void run() {
//        progressDialog.setMessage(getResources().getString(R.string.first_time_logging_fetching_groups));
//      }
//    });
    
    Synchronizer synchronizer = new Synchronizer(LoginActivity.this, handler);
    synchronizer.clearExistingData();
    
//    long time = System.currentTimeMillis();
//    
//    final Group[] groups = synchronizer.syncGroups();
//    
//    handler.post(new Runnable() {
//      public void run() {
//        progressDialog.setMessage(getResources().getString(R.string.first_time_logging_fetching_users));
//      }
//    });
//    
//    synchronizer.syncUsers(groups, true /* download user icons */);
//    
//    handler.post(new Runnable() {
//      public void run() {
//        progressDialog.setMessage(getResources().getString(R.string.first_time_logging_fetching_messages));
//      }
//    });
//    
//    synchronizer.syncMessages(groups);
//    
//    time = System.currentTimeMillis() - time;
//    System.out.println(time);
  }

}