org.mklab.taskit.client.activity.LoginActivity.java Source code

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Here is the source code for org.mklab.taskit.client.activity.LoginActivity.java

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/*
 * 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.mklab.taskit.client.activity;

import org.mklab.taskit.client.ClientFactory;
import org.mklab.taskit.client.place.Student;
import org.mklab.taskit.client.place.StudentList;
import org.mklab.taskit.client.ui.LoginView;
import org.mklab.taskit.shared.UserProxy;

import java.util.Date;

import com.google.gwt.activity.shared.AbstractActivity;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.shared.EventBus;
import com.google.gwt.user.client.Cookies;
import com.google.gwt.user.client.ui.AcceptsOneWidget;
import com.google.web.bindery.requestfactory.shared.Receiver;
import com.google.web.bindery.requestfactory.shared.ServerFailure;

/**
 * ????
 * 
 * @author Yuhi Ishikura
 * @version $Revision$, Jan 22, 2011
 */
public final class LoginActivity extends AbstractActivity {

    /** ?????????????? */
    static final String COOKIE_AUTO_LOGIN_KEY = "taskitAutoLogin"; //$NON-NLS-1$
    private ClientFactory clientFactory;

    /**
     * {@link LoginActivity}???
     * 
     * @param clientFactory 
     */
    public LoginActivity(ClientFactory clientFactory) {
        if (clientFactory == null)
            throw new NullPointerException();
        this.clientFactory = clientFactory;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void start(AcceptsOneWidget panel, @SuppressWarnings("unused") EventBus eventBus) {
        if (isAutoLoginEnabledClient()) {
            tryAutoLoginAsync();
        }
        final LoginView view = createLoginView();

        panel.setWidget(view);
        view.requestFocus();
    }

    /**
     * ?????????????
     * 
     * @return ???????
     */
    private static boolean isAutoLoginEnabledClient() {
        String enabled = Cookies.getCookie(COOKIE_AUTO_LOGIN_KEY);
        if (enabled == null)
            return false;
        return enabled.toUpperCase().equals("TRUE"); //$NON-NLS-1$
    }

    private LoginView createLoginView() {
        final LoginView view = this.clientFactory.getLoginView();

        view.getSubmitButton().addClickHandler(new ClickHandler() {

            @Override
            public void onClick(@SuppressWarnings("unused") ClickEvent event) {
                tryLoginAsync(view);
            }

        });
        return view;
    }

    /**
     * ??????
     * <p>
     * ?????????????????????????
     */
    void tryAutoLoginAsync() {
        this.clientFactory.getRequestFactory().userRequest().getLoginUser().fire(new Receiver<UserProxy>() {

            @SuppressWarnings("synthetic-access")
            @Override
            public void onSuccess(UserProxy response) {
                if (response == null)
                    return;
                startApplication(response);
            }

        });
    }

    /**
     * ??????
     * <p>
     * ????????????????????????????
     * 
     * @param view ??????????
     */
    void tryLoginAsync(final LoginView view) {
        final String id = view.getId();
        final String password = view.getPassword();
        this.clientFactory.getRequestFactory().accountRequest().login(id, password).fire(new Receiver<UserProxy>() {

            @SuppressWarnings("synthetic-access")
            @Override
            public void onSuccess(UserProxy loginUser) {
                view.setStatusText(LoginActivity.this.clientFactory.getMessages().loginSuccessMessage());

                final boolean autoLoginEnabled = view.isAutoLoginEnabled();
                storeAutoLoginState(autoLoginEnabled);

                startApplication(loginUser);
            }

            private void storeAutoLoginState(final boolean autoLoginEnabled) {
                final int A_DAY_IN_MILLIS = 24 * 60 * 60 * 1000;
                final Date expire = new Date(System.currentTimeMillis() + 10 * A_DAY_IN_MILLIS);
                Cookies.setCookie(COOKIE_AUTO_LOGIN_KEY, String.valueOf(autoLoginEnabled), expire);
            }

            /**
             * {@inheritDoc}
             */
            @Override
            public void onFailure(ServerFailure error) {
                view.setStatusText("Login failure. " + error.getMessage()); //$NON-NLS-1$
            }
        });
    }

    /**
     * ????????
     * 
     * @param user 
     */
    private void startApplication(UserProxy user) {
        goToTopPage(user);
    }

    /**
     * ??????????
     * 
     * @param user 
     */
    void goToTopPage(UserProxy user) {
        switch (user.getType()) {
        case TA:
        case TEACHER:
            this.clientFactory.getPlaceController().goTo(StudentList.INSTANCE);
            break;
        case STUDENT:
            this.clientFactory.getPlaceController().goTo(Student.INSTANCE);
        }
    }

}