/*
 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public License
 as published by the Free Software Foundation; either version 2.1 of
 the License, or (at your option) any later version.

 This library 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
 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package com.arsdigita.cms.contentassets.ui;

import com.arsdigita.bebop.PageState;
import com.arsdigita.bebop.SimpleComponent;
import com.arsdigita.cms.CMS;
import com.arsdigita.cms.ContentItem;
import com.arsdigita.cms.dispatcher.SimpleXMLGenerator;
import com.arsdigita.domain.DomainObjectFactory;
import com.arsdigita.domain.DomainObjectXMLRenderer;
import com.arsdigita.kernel.ui.ACSObjectSelectionModel;
import com.arsdigita.persistence.DataCollection;
import com.arsdigita.persistence.OID;
import com.arsdigita.util.UncheckedWrapperException;
import com.arsdigita.web.RedirectSignal;
import com.arsdigita.xml.Element;

import com.arsdigita.cms.contentassets.Note;
import com.arsdigita.cms.util.SecurityConstants;
import com.arsdigita.kernel.Kernel;
import com.arsdigita.kernel.User;
import com.arsdigita.workflow.simple.Workflow;

import java.io.IOException;

import org.apache.log4j.Logger;

public class NotesDisplay extends SimpleComponent {

    private static final Logger s_log = Logger.getLogger(NotesDisplay.class);
    private static final String DELETE = "delete";
    private static final String EDIT = "edit";
    private static final String UP = "up";
    private static final String DOWN = "down";
    private NotesStep m_step;
    private ACSObjectSelectionModel m_noteModel;

    public NotesDisplay(NotesStep step,
                        ACSObjectSelectionModel noteModel) {
        super();

        m_step = step;
        m_noteModel = noteModel;
    }

    public void respond(PageState ps) {
        String name = ps.getControlEventName();
        String value = ps.getControlEventValue();

        if (s_log.isDebugEnabled()) {
            s_log.debug("Action " + name + " on note " + value);
        }

        OID oid = OID.valueOf(value);
        Note note = (Note) DomainObjectFactory.newInstance(oid);

        if (DELETE.equals(name)) {
            note.delete();
        } else if (EDIT.equals(name)) {
            m_noteModel.setSelectedObject(ps, note);
            m_step.showComponent(ps, NotesStep.EDIT);
        } else if (UP.equals(name)) {
            note.setRank(note.getRank() - 1);
        } else if (DOWN.equals(name)) {
            note.setRank(note.getRank() + 1);
        }

        ps.clearControlEvent();
        try {
            throw new RedirectSignal(ps.stateAsURL(), true);
        } catch (IOException ex) {
            throw new UncheckedWrapperException(ex);
        }
    }

    public void generateXML(PageState ps, Element parent) {
        Element root = parent.newChildElement("cms:notesDisplay",
                                              CMS.CMS_XML_NS);

        ContentItem item = m_step.getItem(ps);
        DataCollection notes = Note.getNotes(item);

        if (s_log.isDebugEnabled()) {
            s_log.debug("NotesDisplay.generateXML");
        }

        DomainObjectXMLRenderer xr = new DomainObjectXMLRenderer(root);
        xr.setWrapRoot(true);
        xr.setWrapAttributes(true);
        xr.setWrapObjects(true);

        while (notes.next()) {
            Note note = new Note(notes.getDataObject());
            String oid = note.getOID().toString();
            
            if (CMS.getSecurityManager(ps).canAccess(ps.getRequest(), 
                                                     SecurityConstants.EDIT_ITEM, 
                                                     item)) {
                Element edit = root.newChildElement("cms:notesAction",
                                                    CMS.CMS_XML_NS);
                edit.addAttribute("action", EDIT);
                edit.addAttribute("oid", oid);
                ps.setControlEvent(this, EDIT, oid);
                try {
                    edit.addAttribute("href", ps.stateAsURL());
                } catch (IOException ex) {
                    throw new UncheckedWrapperException(ex);
                }

                Element delete = root.newChildElement("cms:notesAction",
                                                      CMS.CMS_XML_NS);
                delete.addAttribute("action", DELETE);
                delete.addAttribute("oid", oid);
                ps.setControlEvent(this, DELETE, oid);
                try {
                    delete.addAttribute("href", ps.stateAsURL());
                } catch (IOException ex) {
                    throw new UncheckedWrapperException(ex);
                }

                Element up = root.newChildElement("cms:notesAction",
                                                  CMS.CMS_XML_NS);
                up.addAttribute("action", UP);
                up.addAttribute("oid", oid);
                ps.setControlEvent(this, UP, oid);
                try {
                    up.addAttribute("href", ps.stateAsURL());
                } catch (IOException ex) {
                    throw new UncheckedWrapperException(ex);
                }

                Element down = root.newChildElement("cms:notesAction",
                                                    CMS.CMS_XML_NS);
                down.addAttribute("action", DOWN);
                down.addAttribute("oid", oid);
                ps.setControlEvent(this, DOWN, oid);
                try {
                    down.addAttribute("href", ps.stateAsURL());
                } catch (IOException ex) {
                    throw new UncheckedWrapperException(ex);
                }
            }

            ps.clearControlEvent();

            xr.walk(note, SimpleXMLGenerator.ADAPTER_CONTEXT);
        }
    }
}