org.cloudcoder.app.client.view.UserAccountView.java Source code

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Here is the source code for org.cloudcoder.app.client.view.UserAccountView.java

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// CloudCoder - a web-based pedagogical programming environment
// Copyright (C) 2011-2012, Jaime Spacco <jspacco@knox.edu>
// Copyright (C) 2011-2012, David H. Hovemeyer <david.hovemeyer@gmail.com>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package org.cloudcoder.app.client.view;

import java.util.LinkedList;
import java.util.List;

import org.cloudcoder.app.client.model.Session;
import org.cloudcoder.app.client.model.StatusMessage;
import org.cloudcoder.app.client.page.SessionObserver;
import org.cloudcoder.app.client.rpc.RPC;
import org.cloudcoder.app.shared.model.Course;
import org.cloudcoder.app.shared.model.CourseSelection;
import org.cloudcoder.app.shared.model.User;
import org.cloudcoder.app.shared.util.Publisher;
import org.cloudcoder.app.shared.util.Subscriber;
import org.cloudcoder.app.shared.util.SubscriptionRegistrar;

import com.google.gwt.user.cellview.client.DataGrid;
import com.google.gwt.user.cellview.client.TextColumn;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.ResizeComposite;
import com.google.gwt.view.client.SelectionChangeEvent;
import com.google.gwt.view.client.SelectionChangeEvent.Handler;
import com.google.gwt.view.client.SingleSelectionModel;

/**
 * @author jaimespacco
 * @author Andrei Papancea
 */
public class UserAccountView extends ResizeComposite implements Subscriber, SessionObserver {
    private DataGrid<User> grid;
    private Session session;

    /**
     * Constructor.
     */
    public UserAccountView() {
        grid = new DataGrid<User>();
        grid.addColumn(new TextColumn<User>() {
            @Override
            public String getValue(User user) {
                return user.getUsername();
            }
        }, "Username");
        grid.addColumn(new TextColumn<User>() {
            @Override
            public String getValue(User user) {
                return user.getFirstname();
            }
        }, "Firstname");
        grid.addColumn(new TextColumn<User>() {
            @Override
            public String getValue(User user) {
                return user.getLastname();
            }
        }, "Lastname");
        grid.addColumn(new TextColumn<User>() {
            @Override
            public String getValue(User user) {
                return user.getEmail();
            }
        }, "Email");

        initWidget(grid);
    }

    /* (non-Javadoc)
     * @see org.cloudcoder.app.client.page.SessionObserver#activate(org.cloudcoder.app.client.model.Session, org.cloudcoder.app.shared.util.SubscriptionRegistrar)
     */
    @Override
    public void activate(final Session session, SubscriptionRegistrar subscriptionRegistrar) {
        this.session = session;

        // Set selection model.
        // When a User record is selected, it will be added to the Session.
        final SingleSelectionModel<User> selectionModel = new SingleSelectionModel<User>();
        selectionModel.addSelectionChangeHandler(new Handler() {
            @Override
            public void onSelectionChange(SelectionChangeEvent event) {
                User selected = selectionModel.getSelectedObject();
                if (selected != null) {
                    session.add(selected);
                }
            }
        });
        grid.setSelectionModel(selectionModel);

        // If the session contains a list of Users, display them.
        // Otherwise, initiate loading of users for this course.
        User[] userList = session.get(User[].class);

        //ProblemAndSubmissionReceipt[] problemAndSubmissionReceiptList = session.get(ProblemAndSubmissionReceipt[].class);
        if (userList != null) {
            displayUser(userList);
        } else {
            loadUser(session);
        }

    }

    /* (non-Javadoc)
     * @see org.cloudcoder.app.shared.util.Subscriber#eventOccurred(java.lang.Object, org.cloudcoder.app.shared.util.Publisher, java.lang.Object)
     */
    @Override
    public void eventOccurred(Object key, Publisher publisher, Object hint) {
        //        if (key == Session.Event.USER_ACCOUNT && (hint instanceof Course)) {
        //            // load all the users for the current course
        //            loadUser(session);
        //        }
    }

    public void loadUser(final Session session) {
        CourseSelection courseSelection = session.get(CourseSelection.class);
        Course course = courseSelection.getCourse();
        int courseId = course.getId();
        RPC.usersService.getUsers(courseId, 0, new AsyncCallback<User[]>() {
            @Override
            public void onSuccess(User[] result) {
                displayUser(result);
            }

            @Override
            public void onFailure(Throwable caught) {
                session.add(new StatusMessage(StatusMessage.Category.ERROR, "Could not load user account"));
            }
        });
    }

    protected void displayUser(User[] result) {
        User user = session.get(User.class);
        for (User u : result) {
            if (u.getUsername().equals(user.getUsername())) {
                grid.setRowCount(1);
                List<User> list = new LinkedList<User>();
                list.add(u);
                grid.setRowData(list);
                return;
            }
        }
    }
}