001/*
002 *  Copyright 2016 Anyware Services
003 *
004 *  Licensed under the Apache License, Version 2.0 (the "License");
005 *  you may not use this file except in compliance with the License.
006 *  You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 *  Unless required by applicable law or agreed to in writing, software
011 *  distributed under the License is distributed on an "AS IS" BASIS,
012 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *  See the License for the specific language governing permissions and
014 *  limitations under the License.
015 */
016package org.ametys.web.content;
017
018import java.util.Map;
019
020import org.apache.avalon.framework.parameters.Parameters;
021import org.apache.avalon.framework.service.ServiceException;
022import org.apache.avalon.framework.service.ServiceManager;
023import org.apache.cocoon.ResourceNotFoundException;
024import org.apache.cocoon.acting.ServiceableAction;
025import org.apache.cocoon.environment.ObjectModelHelper;
026import org.apache.cocoon.environment.Redirector;
027import org.apache.cocoon.environment.Request;
028import org.apache.cocoon.environment.SourceResolver;
029
030import org.ametys.cms.transformation.xslt.ResolveURIComponent;
031import org.ametys.plugins.explorer.resources.Resource;
032import org.ametys.plugins.repository.AmetysObject;
033import org.ametys.plugins.repository.AmetysObjectResolver;
034import org.ametys.plugins.repository.UnknownAmetysObjectException;
035import org.ametys.runtime.authentication.AccessDeniedException;
036import org.ametys.web.WebConstants;
037import org.ametys.web.repository.page.Page;
038
039/**
040 * Get the page attachment uri from the id of a resource.
041 * Tests if the current asked resource exists and it is an resource of a page.<br>
042 * <ul>
043 * <li>If the resource does not exist, an {@link ResourceNotFoundException} is thrown.</li>
044 * <li>If the resource is not an resource of a page, an {@link AccessDeniedException} is thrown.</li>
045 * <li>If the resource exists and is a page's attachment, redirect to the page attachment uri.</li>
046 * </ul>
047 */
048public class GetPageAttachmentAction extends ServiceableAction
049{
050    private AmetysObjectResolver _resolver;
051    
052    @Override
053    public void service(ServiceManager smanager) throws ServiceException
054    {
055        super.service(smanager);
056        _resolver = (AmetysObjectResolver) smanager.lookup(AmetysObjectResolver.ROLE);
057    }
058    
059    public Map act(Redirector redirector, SourceResolver resolver, Map objectModel, String source, Parameters parameters) throws Exception
060    {
061        Request request = ObjectModelHelper.getRequest(objectModel);
062        Page currentPage = (Page) request.getAttribute(WebConstants.REQUEST_ATTR_PAGE);
063        
064        String id = parameters.getParameter("id", null);
065        boolean download = parameters.getParameterAsBoolean("download", false);
066        
067        try
068        {
069            Resource resource = _resolver.resolveById(id);
070         
071            Page page = _getParentPage(resource);
072            if (page == null)
073            {
074                throw new AccessDeniedException(String.format("Access denied to resource with id '%s' which is not an attachment of a page", id));
075            }
076            
077            request.setAttribute(WebConstants.REQUEST_ATTR_PAGE, page);
078            
079            String uri = ResolveURIComponent.resolve("attachment-page", id, download);
080            redirector.globalRedirect(true, uri);
081            
082            return EMPTY_MAP;
083            
084        }
085        catch (UnknownAmetysObjectException e)
086        {
087            throw new ResourceNotFoundException(String.format("The attachment with id '%s' does not exist", id));
088        }
089        finally 
090        {
091            request.setAttribute(WebConstants.REQUEST_ATTR_PAGE, currentPage);
092        }
093    }
094    
095    private Page _getParentPage (Resource resource)
096    {
097        AmetysObject parent = resource.getParent();
098        while (parent != null)
099        {
100            if (parent instanceof Page)
101            {
102                return (Page) parent;
103            }
104            parent = parent.getParent();
105        }
106        
107        return null;
108    }
109}