ChangePasswordDialog.java

/*
 * Copyright 2014-2016 CyberVision, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.kaaproject.kaa.server.admin.client.mvp.view.dialog;

import static org.kaaproject.kaa.server.admin.shared.util.Utils.isEmpty;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyDownEvent;
import com.google.gwt.event.dom.client.KeyDownHandler;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.FlexTable;
import com.google.gwt.user.client.ui.HasHorizontalAlignment;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;

import org.kaaproject.avro.ui.gwt.client.input.InputEvent;
import org.kaaproject.avro.ui.gwt.client.input.InputEventHandler;
import org.kaaproject.avro.ui.gwt.client.widget.AlertPanel;
import org.kaaproject.avro.ui.gwt.client.widget.dialog.AvroUiDialog;
import org.kaaproject.kaa.common.dto.admin.ResultCode;
import org.kaaproject.kaa.server.admin.client.mvp.view.widget.ExtendedPasswordTextBox;
import org.kaaproject.kaa.server.admin.client.util.Utils;
import org.kaaproject.kaa.server.admin.shared.services.KaaAuthServiceAsync;

public class ChangePasswordDialog extends AvroUiDialog {

  private static final String REQUIRED = Utils.avroUiStyle.requiredField();

  private KaaAuthServiceAsync authService = KaaAuthServiceAsync.Util.getInstance();

  private AlertPanel errorPanel;

  private ExtendedPasswordTextBox oldPassword;
  private ExtendedPasswordTextBox newPassword;
  private ExtendedPasswordTextBox newPasswordAgain;

  private String username;

  private Button changePasswordButton;

  /**
   * Instantiates a new ChangePasswordDialog.
   */
  public ChangePasswordDialog(final Listener listener, String username, String message) {
    super(false, true);

    this.username = username;

    setWidth("500px");

    setTitle(Utils.constants.changePassword());

    VerticalPanel dialogContents = new VerticalPanel();
    dialogContents.setSpacing(4);
    setWidget(dialogContents);

    errorPanel = new AlertPanel(AlertPanel.Type.ERROR);
    errorPanel.setVisible(false);
    dialogContents.add(errorPanel);

    if (message != null) {
      AlertPanel warningPanel = new AlertPanel(AlertPanel.Type.WARNING);
      warningPanel.setMessage(message);
      dialogContents.add(warningPanel);
    }

    FlexTable table = new FlexTable();
    table.setCellSpacing(6);

    int row = 0;
    Widget label = new Label(Utils.constants.oldPassword());
    label.addStyleName(REQUIRED);
    oldPassword = new ExtendedPasswordTextBox();
    table.setWidget(row, 0, label);
    table.setWidget(row, 1, oldPassword);
    InputChangeHandler handler = new InputChangeHandler(listener);
    oldPassword.addInputHandler(handler);
    oldPassword.addKeyDownHandler(handler);

    table.getCellFormatter().setHorizontalAlignment(row, 0, HasHorizontalAlignment.ALIGN_RIGHT);
    row++;
    label = new Label(Utils.constants.newPassword());
    label.addStyleName(REQUIRED);
    newPassword = new ExtendedPasswordTextBox();
    table.setWidget(row, 0, label);
    table.setWidget(row, 1, newPassword);
    newPassword.addInputHandler(handler);
    newPassword.addKeyDownHandler(handler);

    table.getCellFormatter().setHorizontalAlignment(row, 0, HasHorizontalAlignment.ALIGN_RIGHT);
    row++;
    label = new Label(Utils.constants.newPasswordAgain());
    label.addStyleName(REQUIRED);
    newPasswordAgain = new ExtendedPasswordTextBox();
    table.setWidget(row, 0, label);
    table.setWidget(row, 1, newPasswordAgain);
    newPasswordAgain.addInputHandler(handler);
    newPasswordAgain.addKeyDownHandler(handler);

    table.getCellFormatter().setHorizontalAlignment(row, 0, HasHorizontalAlignment.ALIGN_RIGHT);

    dialogContents.add(table);

    changePasswordButton = new Button(Utils.constants.changePassword(), handler);

    Button cancelButton = new Button(Utils.constants.cancel(), new ClickHandler() {
      @Override
      public void onClick(ClickEvent event) {
        hide();
        listener.onCancel();
      }
    });
    addButton(changePasswordButton);
    addButton(cancelButton);

    changePasswordButton.setEnabled(false);
  }

  /**
   * Show change password dialog.
   */
  public static ChangePasswordDialog showChangePasswordDialog(Listener listener,
                                                              String username,
                                                              String message) {
    ChangePasswordDialog dialog = new ChangePasswordDialog(listener, username, message);
    dialog.center();
    dialog.show();
    return dialog;
  }

  private boolean validate() {
    boolean result = !isEmpty(oldPassword.getValue());
    result &= !isEmpty(newPassword.getValue());
    result &= !isEmpty(newPasswordAgain.getValue());
    return result;
  }

  private boolean validatePasswords() {
    String oldPasswordText = oldPassword.getValue();
    String newPasswordText = newPassword.getValue();
    String newPasswordAgainText = newPasswordAgain.getValue();

    if (oldPasswordText.equals(newPasswordText)) {
      setError(Utils.messages.newPasswordShouldDifferent());
      return false;
    } else if (!newPasswordText.equals(newPasswordAgainText)) {
      setError(Utils.messages.newPasswordsNotMatch());
      return false;
    }
    return true;
  }

  private void performChangePassword(final AsyncCallback<ResultCode> callback) {
    if (validatePasswords()) {
      String oldPasswordText = oldPassword.getValue();
      String newPasswordText = newPassword.getValue();
      authService.changePassword(
          username, oldPasswordText, newPasswordText, new AsyncCallback<ResultCode>() {
            @Override
            public void onFailure(Throwable caught) {
              callback.onFailure(caught);
            }

            @Override
            public void onSuccess(ResultCode result) {
              if (ResultCode.OK != result) {
                setError(Utils.constants.getString(result.getResourceKey()));
              }
              callback.onSuccess(result);
            }
          });
    }
  }

  private void setError(String error) {
    if (error != null) {
      errorPanel.setMessage(error);
      errorPanel.setVisible(true);
    } else {
      errorPanel.setMessage("");
      errorPanel.setVisible(false);
    }
  }

  public interface Listener {

    public void onChangePassword();

    public void onCancel();

  }

  class InputChangeHandler implements ClickHandler, KeyDownHandler, InputEventHandler {

    final Listener listener;

    public InputChangeHandler(Listener listener) {
      this.listener = listener;
    }

    @Override
    public void onClick(ClickEvent event) {
      performChangePassword(new AsyncCallback<ResultCode>() {
        @Override
        public void onFailure(Throwable caught) {
        }

        @Override
        public void onSuccess(ResultCode result) {
          if (result == ResultCode.OK) {
            hide();
            listener.onChangePassword();
          }
        }
      });
    }

    @Override
    public void onKeyDown(KeyDownEvent event) {
      if (event.getNativeKeyCode() == KeyCodes.KEY_ENTER && validate()) {
        onClick(null);
      }
    }

    @Override
    public void onInputChanged(InputEvent event) {
      boolean valid = validate();
      changePasswordButton.setEnabled(valid);
    }
  }

}