001/*
002 *  Copyright 2014 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.plugins.pagesubscription;
017
018import java.io.IOException;
019import java.util.HashSet;
020import java.util.Set;
021import java.util.regex.Pattern;
022
023import javax.jcr.Node;
024import javax.jcr.RepositoryException;
025import javax.jcr.Value;
026
027import org.apache.avalon.framework.service.ServiceException;
028import org.apache.avalon.framework.service.ServiceManager;
029import org.apache.cocoon.ProcessingException;
030import org.apache.cocoon.environment.ObjectModelHelper;
031import org.apache.cocoon.environment.Request;
032import org.apache.cocoon.generation.ServiceableGenerator;
033import org.apache.cocoon.xml.AttributesImpl;
034import org.apache.cocoon.xml.XMLUtils;
035import org.xml.sax.SAXException;
036
037import org.ametys.core.user.CurrentUserProvider;
038import org.ametys.core.user.User;
039import org.ametys.core.user.UserIdentity;
040import org.ametys.core.user.UserManager;
041import org.ametys.plugins.repository.AmetysObjectResolver;
042import org.ametys.plugins.repository.RepositoryConstants;
043import org.ametys.plugins.repository.jcr.JCRAmetysObject;
044import org.ametys.web.repository.page.Page;
045
046/**
047 * Generate user info about a page
048 */
049public class InfoSubscriberGenerator extends ServiceableGenerator
050{
051    /** Constant for the attachment node name. */
052    public static final String SUBSCRIBERS_PROPERTY_NAME = RepositoryConstants.NAMESPACE_PREFIX_INTERNAL + ":subscriberMails";
053    
054    /** The pattern to check emails */
055    protected static final Pattern EMAIL_VALIDATOR = Pattern.compile("^([a-z0-9._-]+@[a-z0-9.-]{2,}[.][a-zA-Z0-9]{2,})?$");
056    
057    /** The pattern to check text input */
058    protected static final Pattern TEXT_VALIDATOR = Pattern.compile("^\\s*$");
059    
060    /** Repository content */
061    protected AmetysObjectResolver _resolver;
062    
063    /** FO user manager */
064    protected UserManager _foUserManager;
065    
066    /** The current user provider */
067    protected CurrentUserProvider _currentUserProvider;
068    
069    @Override
070    public void service(ServiceManager smanager) throws ServiceException
071    {
072        super.service(smanager);
073        _resolver = (AmetysObjectResolver) smanager.lookup(AmetysObjectResolver.ROLE);
074        _foUserManager = (UserManager) smanager.lookup(UserManager.ROLE);
075        _currentUserProvider = (CurrentUserProvider) smanager.lookup(CurrentUserProvider.ROLE);
076    }
077
078    public void generate() throws IOException, SAXException, ProcessingException
079    {
080        Request request = ObjectModelHelper.getRequest(objectModel);
081        
082        UserIdentity userIdentity = _currentUserProvider.getUser();
083        User user = _foUserManager.getUser(userIdentity.getPopulationId(), userIdentity.getLogin());
084        
085        contentHandler.startDocument();
086        AttributesImpl attr = new AttributesImpl();
087        if (user == null)
088        {
089            attr.addCDATAAttribute("isLogged", "false");
090            XMLUtils.createElement(contentHandler, "user", attr);
091        }
092        else
093        {
094            attr.addCDATAAttribute("isLogged", "true");
095            String email = user.getEmail();
096          
097            String pageId = request.getParameter("page-id");
098            if (pageId == null) 
099            {
100                throw new IllegalArgumentException("Unable to subscribe or unsubscribe to the page: cannot determine the current page");
101            }
102            else
103            {
104                Page page = _resolver.resolveById(pageId);
105                if (page instanceof JCRAmetysObject)
106                {
107                    Set<String> subscribers = _getSubscribers((JCRAmetysObject) page);
108                    attr.addCDATAAttribute("isRegistered", Boolean.toString(subscribers.contains(email)));
109                }
110                else
111                {
112                    throw new ProcessingException("Unable to subscribe or unsubscribe to the page: the page is not subscribable");
113                }
114            }
115            XMLUtils.createElement(contentHandler, "user", attr, email);    
116        }
117        contentHandler.endDocument();
118    }
119
120    private Set<String> _getSubscribers (JCRAmetysObject page)
121    {
122        Set<String> subscriberMails = new HashSet<>();
123        
124        try
125        {
126            Node node = page.getNode();
127            if (node.hasProperty(SUBSCRIBERS_PROPERTY_NAME))
128            {
129                Value[] values = node.getProperty(SUBSCRIBERS_PROPERTY_NAME).getValues();
130                for (Value value : values)
131                {
132                    subscriberMails.add(value.getString());
133                }
134            }
135        }
136        catch (RepositoryException e)
137        {
138            getLogger().error("Unable to retrieve subscribers for page of id'" + page.getId() + "'", e);
139        }
140        
141        return subscriberMails;
142    }
143
144}