D-Net

package eu.dnetlib.repo.manager.client;

import com.google.gwt.core.client.GWT;

import com.google.gwt.dom.client.Document;

import com.google.gwt.dom.client.Style;

import com.google.gwt.event.dom.client.ClickEvent;

import com.google.gwt.event.dom.client.ClickHandler;

import com.google.gwt.user.client.Cookies;

import com.google.gwt.user.client.DOM;

import com.google.gwt.user.client.Window;

import com.google.gwt.user.client.rpc.AsyncCallback;

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.datepicker.client.CalendarUtil;

import eu.dnetlib.domain.functionality.UserProfile;

import eu.dnetlib.gwt.client.MyFormGroup;

import eu.dnetlib.repo.manager.client.services.UserService;

import eu.dnetlib.repo.manager.client.services.UserServiceAsync;

import eu.dnetlib.repo.manager.shared.Tuple;

import eu.dnetlib.repo.manager.shared.UserAccessException;

import org.gwtbootstrap3.client.ui.Alert;

import org.gwtbootstrap3.client.ui.Anchor;

import org.gwtbootstrap3.client.ui.Form;

import org.gwtbootstrap3.client.ui.SubmitButton;

import org.gwtbootstrap3.client.ui.constants.AlertType;

import org.gwtbootstrap3.client.ui.constants.ButtonType;

import org.gwtbootstrap3.client.ui.html.Paragraph;

import java.util.Date;

/**

 * Created by stefania on 12/2/15.

 */

public class LoginPage {

    private static LoginPage instance = null;

    private Form userLoginForm = new Form();

    private Alert successLabel = new Alert();

    private Alert errorLabel = new Alert();

    private TextBox email;

    private PasswordTextBox password;

    private SubmitButton login = new SubmitButton();

    private Anchor forgotYourPassword = new Anchor();

    private Paragraph paragraph = new Paragraph();

    private Anchor register = new Anchor();

    private UserServiceAsync userService = GWT.create(UserService.class);

    private LoginListener loginListener;

    private LoginPage() {

        successLabel.setType(AlertType.SUCCESS);

        successLabel.setVisible(false);

        successLabel.setDismissable(false);

        userLoginForm.add(successLabel);

        errorLabel.setType(AlertType.DANGER);

        errorLabel.setVisible(false);

        errorLabel.setDismissable(false);

        userLoginForm.add(errorLabel);

        userLoginForm.addStyleName("m-t");

        email = TextBox.wrap(DOM.getElementById("creds_username"));

        email.getElement().setPropertyString("placeholder", "Username / Email");

        email.addStyleName("form-control");

        userLoginForm.add(new MyFormGroup(false, null, email));

        password = PasswordTextBox.wrap(DOM.getElementById("creds_password"));

        password.getElement().setPropertyString("placeholder", "Password");

        password.addStyleName("form-control");

        userLoginForm.add(new MyFormGroup(false, null, password));

        login.setType(ButtonType.PRIMARY);

        login.setText("Login");

        login.addStyleName("block full-width m-b");

        login.addClickHandler(new ClickHandler() {

            @Override

            public void onClick(ClickEvent event) {

                successLabel.setVisible(false);

                errorLabel.setVisible(false);

                if(email.getValue().trim().isEmpty() || password.getValue().trim().isEmpty()) {

                    errorLabel.setText("Both username / email and password fields are required");

                    errorLabel.setVisible(true);

                } else {

                    userService.login(email.getValue(), password.getValue(), new AsyncCallback<Tuple<UserProfile, String>>() {

                        @Override

                        public void onFailure(Throwable throwable) {

                            if (throwable instanceof UserAccessException) {

                                UserAccessException uae = (UserAccessException) throwable;

                                errorLabel.setText(uae.getMessage());

                                errorLabel.setVisible(true);

                            } else {

                                errorLabel.setText("Login failed - Something went wrong, please try again.");

                                errorLabel.setVisible(true);

                            }

                        }

                        @Override

                        public void onSuccess(Tuple<UserProfile, String> result) {

                            RepositoryManager.currentUser = result.getFirst();

                            RepositoryManager.currentUserRole = result.getSecond();

                            Date expireDate = new Date();

                            CalendarUtil.addDaysToDate(expireDate, 1);

                            Cookies.setCookie("currentUser", Crypto.encrypt(result.getFirst().getEmail()), expireDate);

                            if (loginListener != null)

                                loginListener.loginSucceeded(result.getFirst());

                        }

                    });

                }

            }

        });

        userLoginForm.add(login);

        forgotYourPassword.setHTML("<small>Forgot password?</small>");

        userLoginForm.add(forgotYourPassword);

        paragraph.setHTML("<small>Do not have an account?</small>");

        paragraph.addStyleName("text-muted text-center");

        userLoginForm.add(paragraph);

        register.setHref("#register");

        register.setText("Create an account");

        register.addStyleName("btn btn-sm btn-white btn-block");

        userLoginForm.add(register);

        RootPanel.get("loginForm").add(userLoginForm);

    }

    public static final LoginPage getInstance() {

        if(instance==null)

            instance = new LoginPage();

        return instance;

    }

    public void showLoginPage() {

        Document.get().getElementById("landingPage").getStyle().setDisplay(Style.Display.NONE);

        Document.get().getElementById("register").getStyle().setDisplay(Style.Display.NONE);

        Document.get().getElementById("wrapper").getStyle().setDisplay(Style.Display.NONE);

        Document.get().getElementById("login").getStyle().setDisplay(Style.Display.BLOCK);

//        Document.get().getBody().removeClassName("landing-page");

//        Document.get().getBody().addClassName("gray-bg");

    }

    public interface LoginListener {

        void loginSucceeded(UserProfile userProfile);

    }

    public void setLoginListener(LoginListener loginListener) {

        this.loginListener = loginListener;

    }

    public void showSuccessfulMessage(String message) {

        Window.alert("showing successful activation message");

        successLabel.setText(message);

        successLabel.setVisible(true);

    }

}