opus.gwt.management.console.client.AuthenticationPanel.java Source code

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Here is the source code for opus.gwt.management.console.client.AuthenticationPanel.java

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/*############################################################################
# Copyright 2010 North Carolina State University                             #
#                                                                            #
#   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 opus.gwt.management.console.client;

import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyPressEvent;
import com.google.gwt.http.client.Request;
import com.google.gwt.http.client.RequestBuilder;
import com.google.gwt.http.client.RequestCallback;
import com.google.gwt.http.client.RequestException;
import com.google.gwt.http.client.Response;
import com.google.gwt.http.client.URL;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.uibinder.client.UiHandler;
import com.google.gwt.user.client.Cookies;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FormPanel;
import com.google.gwt.user.client.ui.Hidden;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.PasswordTextBox;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.Widget;

public class AuthenticationPanel extends Composite {

    private static AuthenticationUiBinder uiBinder = GWT.create(AuthenticationUiBinder.class);

    interface AuthenticationUiBinder extends UiBinder<Widget, AuthenticationPanel> {
    }

    private final String loginURL = "/accounts/login/";

    private boolean loggedIn;
    private boolean firstLoginAttempt;
    private ClientFactory clientFactory;

    @UiField
    Hidden csrftoken;
    @UiField
    Button loginButton;
    @UiField
    TextBox usernameTextBox;
    @UiField
    PasswordTextBox passwordTextBox;
    @UiField
    FormPanel authenticationForm;
    @UiField
    Label errorLabel;

    public AuthenticationPanel(ClientFactory clientFactory) {
        initWidget(uiBinder.createAndBindUi(this));
        this.clientFactory = clientFactory;
        loggedIn = false;
        firstLoginAttempt = true;
        if (!clientFactory.getJSVariableHandler().getUser().equals("")) {
            loginSucceeded();
        } else {
            RootPanel.get().add(this);
        }
    }

    private void onLogin(boolean success) {
        if (!success) {
            if (firstLoginAttempt)
                firstLoginAttempt = false;
            Window.alert("Fialed login");
            loginFailed();
        } else {
            Window.alert("Succeed Login");
            loginSucceeded();
        }
    }

    private void loginFailed() {
        loggedIn = false;
        usernameTextBox.setFocus(true);
        if (!firstLoginAttempt) {
            errorLabel.setVisible(true);
            usernameTextBox.setText("");
            passwordTextBox.setText("");
        }
    }

    private void loginSucceeded() {
        loggedIn = true;
        ManagementConsoleController mcc = new ManagementConsoleController(clientFactory);
    }

    private void submitLogin() {
        StringBuffer formBuilder = new StringBuffer();
        formBuilder.append("csrfmiddlewaretoken=");
        formBuilder.append(URL.encodeQueryString(clientFactory.getJSVariableHandler().getCSRFTokenURL()));

        formBuilder.append("&username=");
        formBuilder.append(URL.encodeQueryString(usernameTextBox.getText()));
        formBuilder.append("&password=");
        formBuilder.append(URL.encodeQueryString(passwordTextBox.getText()));

        RequestBuilder builder = new RequestBuilder(RequestBuilder.POST, loginURL);
        builder.setHeader("Content-type", "application/x-www-form-urlencoded");

        try {
            Request request = builder.sendRequest(formBuilder.toString(), new RequestCallback() {
                public void onError(Request request, Throwable exception) {
                    Window.alert(exception.getMessage());
                }

                public void onResponseReceived(Request request, Response response) {
                    if (response.getText().contains("Please try again.")) {
                        onLogin(false);
                    } else {
                        onLogin(true);
                    }
                }
            });
        } catch (RequestException e) {

        }

    }

    @UiHandler("loginButton")
    void onLoginClick(ClickEvent event) {
        submitLogin();
    }

    @UiHandler("loginButton")
    void onKeyPressLogin(KeyPressEvent event) {
        if (event.getCharCode() == KeyCodes.KEY_ENTER) {
            loginButton.click();
        }
    }

    @UiHandler("usernameTextBox")
    void onKeyPressUsername(KeyPressEvent event) {
        if (event.getCharCode() == KeyCodes.KEY_ENTER) {
            loginButton.click();
        }
    }

    @UiHandler("passwordTextBox")
    void onKeyPressPassword(KeyPressEvent event) {
        if (event.getCharCode() == KeyCodes.KEY_ENTER) {
            loginButton.click();
        }
    }

    public boolean isLoggedIn() {
        return loggedIn;
    }
}