001/*
002 *  Copyright 2022 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.workspaces.chat;
017
018import java.io.IOException;
019import java.util.Map;
020import java.util.Set;
021import java.util.stream.Collectors;
022
023import org.apache.avalon.framework.logger.AbstractLogEnabled;
024import org.apache.avalon.framework.service.ServiceException;
025import org.apache.avalon.framework.service.ServiceManager;
026import org.apache.avalon.framework.service.Serviceable;
027
028import org.ametys.core.group.Group;
029import org.ametys.core.group.GroupIdentity;
030import org.ametys.core.group.GroupManager;
031import org.ametys.core.observation.Event;
032import org.ametys.core.observation.Observer;
033import org.ametys.core.user.UserIdentity;
034import org.ametys.plugins.workspaces.ObservationConstants;
035import org.ametys.plugins.workspaces.members.JCRProjectMember.MemberType;
036import org.ametys.plugins.workspaces.members.ProjectMemberManager;
037import org.ametys.plugins.workspaces.members.ProjectMemberManager.ProjectMember;
038import org.ametys.plugins.workspaces.project.objects.Project;
039import org.ametys.runtime.config.Config;
040
041/**
042 * Kick a Chat user from a room when it is removed from a project
043 */
044public class MemberRemovedObserver extends AbstractLogEnabled implements Observer, Serviceable 
045{
046    /** Chat helper */
047    protected ChatHelper _chatHelper;
048    private GroupManager _groupManager;
049    private ProjectMemberManager _projectMemberManager;
050
051    public void service(ServiceManager manager) throws ServiceException
052    {
053        _chatHelper = (ChatHelper) manager.lookup(ChatHelper.ROLE);
054        _groupManager = (GroupManager) manager.lookup(GroupManager.ROLE);
055        _projectMemberManager = (ProjectMemberManager) manager.lookup(ProjectMemberManager.ROLE);
056    }
057
058    public boolean supports(Event event)
059    {
060        return ObservationConstants.EVENT_MEMBER_DELETED.equals(event.getId()) && Config.getInstance().<Boolean>getValue("workspaces.chat.active");
061    }
062
063    public int getPriority(Event event)
064    {
065        return MAX_PRIORITY; // Yes, "MAX PRIORITY" is the lowest priority...
066    }
067
068    public void observe(Event event, Map<String, Object> transientVars) throws Exception
069    {
070        Project project = (Project) event.getArguments().get(ObservationConstants.ARGS_PROJECT);
071
072        String memberIdentity = (String) event.getArguments().get(ObservationConstants.ARGS_MEMBER_IDENTITY);
073        MemberType memberType = (MemberType) event.getArguments().get(ObservationConstants.ARGS_MEMBER_IDENTITY_TYPE);
074
075        Set<UserIdentity> users;
076        
077        if (memberType == MemberType.USER)
078        {
079            users = Set.of(UserIdentity.stringToUserIdentity(memberIdentity));
080        }
081        else
082        {
083            GroupIdentity groupIdentity = GroupIdentity.stringToGroupIdentity(memberIdentity);
084            Group group = _groupManager.getGroup(groupIdentity);
085            users = group.getUsers();
086        }
087        
088        Set<ProjectMember> projectMembers = _projectMemberManager.getProjectMembers(project, true);
089        Set<UserIdentity> stillMembers = projectMembers.stream().map(m -> m.getUser().getIdentity()).collect(Collectors.toSet());
090        
091        for (UserIdentity user : users)
092        {
093            // A user can be still member via another group or directly...
094            if (!stillMembers.contains(user))
095            {
096                try
097                {
098                    _chatHelper.removeUserFromRoom(user, project.getName());
099                }
100                catch (IOException e)
101                {
102                    getLogger().error("An error occurred that prevented the user " + UserIdentity.userIdentityToString(user) + " to be removed from the room " + project.getName(), e);
103                }
104            }
105        }
106    }
107
108}