ResetPasswordDialog.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.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.SizedTextBox;
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.KaaAdminSizedTextBox;
import org.kaaproject.kaa.server.admin.client.util.HasErrorMessage;
import org.kaaproject.kaa.server.admin.client.util.Utils;
import org.kaaproject.kaa.server.admin.shared.services.KaaAuthServiceAsync;

public class ResetPasswordDialog extends AvroUiDialog implements HasErrorMessage {

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

  private AlertPanel errorPanel;
  private AlertPanel messagePanel;

  private SizedTextBox usernameOrEmail;
  private Button sendResetPasswordLinkButton;
  private Listener listener;

  /**
   * Instantiates a new ResetPasswordDialog.
   */
  public ResetPasswordDialog(Listener listener) {
    super(false, true);

    this.listener = listener;

    setWidth("500px");

    setTitle(Utils.constants.resetPassword());

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

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

    messagePanel = new AlertPanel(AlertPanel.Type.WARNING);
    messagePanel.setMessage(Utils.messages.resetPasswordMessage());
    dialogContents.add(messagePanel);

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

    int row = 0;
    Widget label = new Label(Utils.constants.usernameOrEmail());
    label.addStyleName(Utils.avroUiStyle.requiredField());
    usernameOrEmail = new KaaAdminSizedTextBox(255);
    table.setWidget(row, 0, label);
    table.setWidget(row, 1, usernameOrEmail);
    usernameOrEmail.addInputHandler(new InputEventHandler() {
      @Override
      public void onInputChanged(InputEvent event) {
        boolean valid = validate();
        sendResetPasswordLinkButton.setEnabled(valid);
      }
    });

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

    dialogContents.add(table);

    sendResetPasswordLinkButton = new Button(
            Utils.constants.sendResetPasswordLink(), new ClickHandler() {
              @Override
              public void onClick(ClickEvent event) {
                validateUsernameOrEmail();
              }
            });

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

    sendResetPasswordLinkButton.setEnabled(false);
  }

  /**
   * Show reset password dialog.
   */
  public static ResetPasswordDialog showResetPasswordDialog(Listener listener) {
    ResetPasswordDialog dialog = new ResetPasswordDialog(listener);
    dialog.center();
    dialog.show();
    return dialog;
  }

  private boolean validate() {
    return !isEmpty(usernameOrEmail.getValue());
  }

  private void validateUsernameOrEmail() {
    String usernameOrEmailText = usernameOrEmail.getValue();
    authService.checkUsernameOrEmailExists(usernameOrEmailText, new AsyncCallback<ResultCode>() {
      @Override
      public void onFailure(Throwable caught) {
        Utils.handleException(caught, ResetPasswordDialog.this);
      }

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

    });
  }

  private void sendResetPasswordLink() {
    String usernameOrEmailText = usernameOrEmail.getValue();
    authService.sendPasswordResetLinkByEmail(usernameOrEmailText, new AsyncCallback<ResultCode>() {
      @Override
      public void onFailure(Throwable caught) {
        Utils.handleException(caught, ResetPasswordDialog.this);
      }

      @Override
      public void onSuccess(ResultCode result) {
        if (ResultCode.OK != result) {
          setErrorMessage(Utils.constants.getString(result.getResourceKey()));
        } else {
          MessageDialog dialog = new MessageDialog(new MessageDialog.Listener() {
            @Override
            public void onOk() {
              hide();
              listener.onSendResetPasswordLink();
            }
          },
              Utils.constants.resetLinkWasSent(),
              Utils.messages.resetPasswordLinkWasSent());
          dialog.show();
          dialog.center();
        }
      }

    });
  }

  @Override
  public void clearError() {
    errorPanel.setMessage("");
    errorPanel.setVisible(false);
  }

  @Override
  public void setErrorMessage(String message) {
    errorPanel.setMessage(message);
    errorPanel.setVisible(true);
  }

  public interface Listener {

    public void onSendResetPasswordLink();

    public void onCancel();

  }

}