com.socialsite.course.AddNotePanel.java Source code

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Here is the source code for com.socialsite.course.AddNotePanel.java

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/**
 *     Copyright SocialSite (C) 2009
 *
 *     This program is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU 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 General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.socialsite.course;

import java.util.Date;
import java.util.HashSet;

import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.markup.html.form.RequiredTextField;
import org.apache.wicket.markup.html.form.SubmitLink;
import org.apache.wicket.markup.html.form.upload.FileUpload;
import org.apache.wicket.markup.html.form.upload.FileUploadField;
import org.apache.wicket.markup.html.panel.FeedbackPanel;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.PropertyModel;
import org.apache.wicket.spring.injection.annot.SpringBean;

import com.socialsite.BasePanel;
import com.socialsite.dao.CourseDao;
import com.socialsite.dao.MessageDao;
import com.socialsite.dao.NoteDao;
import com.socialsite.persistence.Course;
import com.socialsite.persistence.CourseNoteMsg;
import com.socialsite.persistence.Message;
import com.socialsite.persistence.Note;
import com.socialsite.persistence.Staff;
import com.socialsite.persistence.User;

/**
 * @author Ananth
 */
public class AddNotePanel extends BasePanel {

    private FileUploadField fileUploadField;
    private String description;

    /** feedback panel */
    FeedbackPanel feedback;

    private final Course course;
    @SpringBean(name = "noteDao")
    NoteDao noteDao;

    @SpringBean(name = "messageDao")
    MessageDao<Message> messageDao;

    @SpringBean(name = "courseDao")
    CourseDao courseDao;

    public AddNotePanel(String id, final IModel<Course> model) {
        super(id);
        this.course = model.getObject();
        Form<Void> form = new Form<Void>("form");
        add(form);
        form.add(fileUploadField = new FileUploadField("file"));
        form.add(new RequiredTextField<String>("description", new PropertyModel<String>(this, "description")));
        form.add(new SubmitLink("submit") {
            /**
             * 
             */
            private static final long serialVersionUID = 1L;

            @Override
            public void onSubmit() {
                final FileUpload upload = fileUploadField.getFileUpload();
                if (upload == null || upload.getSize() == 0) {
                    error("upload a file");
                } else if (upload.getSize() > 1024 * 1024) {
                    // TODO change this to 10MB
                    error("file size too large");
                } else {
                    final Course course = courseDao.load(model.getObject().getId());
                    Note note = new Note();
                    note.setCourse(course);
                    note.setTime(new Date());
                    note.setDescription(description);
                    note.setFileName(upload.getClientFileName());
                    note.setData(upload.getBytes());
                    note.setContentType(upload.getContentType());
                    noteDao.save(note);

                    CourseNoteMsg noteMsg = new CourseNoteMsg();
                    noteMsg.setTime(new Date());
                    noteMsg.setNote(note);
                    noteMsg.setUsers(new HashSet<User>(course.getStudents()));

                    messageDao.save(noteMsg);

                }
            }
        });

        add(feedback = new FeedbackPanel("feedback"));
    }

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    @Override
    public boolean isVisible() {
        User user = getSessionUser();
        if (user instanceof Staff) {
            return ((Staff) user).getCourses().contains(course);
        }
        return false;
    }

}