this is step 2 of 2 of the OpenSim.Region.Environment refactor.

NOTHING has been deleted or moved off to forge at this point.  what
has happened is that OpenSim.Region.Environment.Modules has been split
in two:

- OpenSim.Region.CoreModules: all those modules that are either
  directly or indirectly referenced from  other  OpenSim packages, or
  that provide functionality that the OpenSim developer community
  considers core functionality:

      CoreModules/Agent/AssetTransaction
      CoreModules/Agent/Capabilities
      CoreModules/Agent/TextureDownload
      CoreModules/Agent/TextureSender
      CoreModules/Agent/TextureSender/Tests
      CoreModules/Agent/Xfer
      CoreModules/Avatar/AvatarFactory
      CoreModules/Avatar/Chat/ChatModule
      CoreModules/Avatar/Combat
      CoreModules/Avatar/Currency/SampleMoney
      CoreModules/Avatar/Dialog
      CoreModules/Avatar/Friends
      CoreModules/Avatar/Gestures
      CoreModules/Avatar/Groups
      CoreModules/Avatar/InstantMessage
      CoreModules/Avatar/Inventory
      CoreModules/Avatar/Inventory/Archiver
      CoreModules/Avatar/Inventory/Transfer
      CoreModules/Avatar/Lure
      CoreModules/Avatar/ObjectCaps
      CoreModules/Avatar/Profiles
      CoreModules/Communications/Local
      CoreModules/Communications/REST
      CoreModules/Framework/EventQueue
      CoreModules/Framework/InterfaceCommander
      CoreModules/Hypergrid
      CoreModules/InterGrid
      CoreModules/Scripting/DynamicTexture
      CoreModules/Scripting/EMailModules
      CoreModules/Scripting/HttpRequest
      CoreModules/Scripting/LoadImageURL
      CoreModules/Scripting/VectorRender
      CoreModules/Scripting/WorldComm
      CoreModules/Scripting/XMLRPC
      CoreModules/World/Archiver
      CoreModules/World/Archiver/Tests
      CoreModules/World/Estate
      CoreModules/World/Land
      CoreModules/World/Permissions
      CoreModules/World/Serialiser
      CoreModules/World/Sound
      CoreModules/World/Sun
      CoreModules/World/Terrain
      CoreModules/World/Terrain/DefaultEffects
      CoreModules/World/Terrain/DefaultEffects/bin
      CoreModules/World/Terrain/DefaultEffects/bin/Debug
      CoreModules/World/Terrain/Effects
      CoreModules/World/Terrain/FileLoaders
      CoreModules/World/Terrain/FloodBrushes
      CoreModules/World/Terrain/PaintBrushes
      CoreModules/World/Terrain/Tests
      CoreModules/World/Vegetation
      CoreModules/World/Wind
      CoreModules/World/WorldMap

- OpenSim.Region.OptionalModules: all those modules that are not core
  modules:

      OptionalModules/Avatar/Chat/IRC-stuff
      OptionalModules/Avatar/Concierge
      OptionalModules/Avatar/Voice/AsterixVoice
      OptionalModules/Avatar/Voice/SIPVoice
      OptionalModules/ContentManagementSystem
      OptionalModules/Grid/Interregion
      OptionalModules/Python
      OptionalModules/SvnSerialiser
      OptionalModules/World/NPC
      OptionalModules/World/TreePopulator

1 files changed, 223 insertions, 0 deletions

diff --git a/OpenSim/Region/CoreModules/Avatar/Groups/GroupsModule.cs b/OpenSim/Region/CoreModules/Avatar/Groups/GroupsModule.cs
new file mode 100644
index 0000000..92d0fdd
--- /dev/null
+++ b/OpenSim/Region/CoreModules/Avatar/Groups/GroupsModule.cs
@@ -0,0 +1,223 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSim Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System;
+using System.Collections.Generic;
+using System.Reflection;
+using OpenMetaverse;
+using log4net;
+using Nini.Config;
+using OpenSim.Framework;
+using OpenSim.Region.Framework.Interfaces;
+using OpenSim.Region.Framework.Scenes;
+
+namespace OpenSim.Region.CoreModules.Avatar.Groups
+{
+    public class GroupsModule : IRegionModule
+    {
+        private static readonly ILog m_log =
+            LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
+        private Dictionary<UUID, GroupMembershipData> m_GroupMap =
+                new Dictionary<UUID, GroupMembershipData>();
+
+        private Dictionary<UUID, IClientAPI> m_ClientMap =
+                new Dictionary<UUID, IClientAPI>();
+
+        private UUID opensimulatorGroupID =
+                new UUID("00000000-68f9-1111-024e-222222111123");
+
+        private List<Scene> m_SceneList = new List<Scene>();
+
+        private static GroupMembershipData osGroup =
+                new GroupMembershipData();
+
+        #region IRegionModule Members
+
+        public void Initialise(Scene scene, IConfigSource config)
+        {
+            IConfig groupsConfig = config.Configs["Groups"];
+
+            if (groupsConfig == null)
+            {
+                m_log.Info("[GROUPS]: No configuration found. Using defaults");
+            }
+            else
+            {
+                if (!groupsConfig.GetBoolean("Enabled", false))
+                {
+                    m_log.Info("[GROUPS]: Groups disabled in configuration");
+                    return;
+                }
+
+                if (groupsConfig.GetString("Module", "Default") != "Default")
+                    return;
+            }
+
+            lock (m_SceneList)
+            {
+                if (!m_SceneList.Contains(scene))
+                {
+                    if (m_SceneList.Count == 0)
+                    {
+                        osGroup.GroupID = opensimulatorGroupID;
+                        osGroup.GroupName = "OpenSimulator Testing";
+                        osGroup.GroupPowers =
+                                (uint)(GroupPowers.AllowLandmark |
+                                GroupPowers.AllowSetHome);
+                        m_GroupMap[opensimulatorGroupID] = osGroup;
+                    }
+                    m_SceneList.Add(scene);
+                }
+            }
+
+            scene.EventManager.OnNewClient += OnNewClient;
+            scene.EventManager.OnClientClosed += OnClientClosed;
+            scene.EventManager.OnIncomingInstantMessage +=
+                    OnGridInstantMessage;
+        }
+
+        public void PostInitialise()
+        {
+        }
+
+        public void Close()
+        {
+//            m_log.Debug("[GROUPS]: Shutting down group module.");
+            
+            lock (m_ClientMap)
+            {
+                m_ClientMap.Clear();
+            }
+
+            lock (m_GroupMap)
+            {
+                m_GroupMap.Clear();
+            }
+        }
+
+        public string Name
+        {
+            get { return "GroupsModule"; }
+        }
+
+        public bool IsSharedModule
+        {
+            get { return true; }
+        }
+
+        #endregion
+
+        private void OnNewClient(IClientAPI client)
+        {
+            // Subscribe to instant messages
+            client.OnInstantMessage += OnInstantMessage;
+            client.OnAgentDataUpdateRequest += OnAgentDataUpdateRequest;
+            client.OnUUIDGroupNameRequest += HandleUUIDGroupNameRequest;
+            lock (m_ClientMap)
+            {
+                if (!m_ClientMap.ContainsKey(client.AgentId))
+                {
+                    m_ClientMap.Add(client.AgentId, client);
+                }
+            }
+
+            GroupMembershipData[] updateGroups = new GroupMembershipData[1];
+            updateGroups[0] = osGroup;
+
+            client.SendGroupMembership(updateGroups);
+        }
+
+        private void OnAgentDataUpdateRequest(IClientAPI remoteClient,
+                UUID AgentID, UUID SessionID)
+        {
+            UUID ActiveGroupID;
+            string ActiveGroupName;
+            ulong ActiveGroupPowers;
+
+            string firstname = remoteClient.FirstName;
+            string lastname = remoteClient.LastName;
+
+            string ActiveGroupTitle = "I IZ N0T";
+
+            ActiveGroupID = osGroup.GroupID;
+            ActiveGroupName = osGroup.GroupName;
+            ActiveGroupPowers = osGroup.GroupPowers;
+
+            remoteClient.SendAgentDataUpdate(AgentID, ActiveGroupID, firstname,
+                    lastname, ActiveGroupPowers, ActiveGroupName,
+                    ActiveGroupTitle);
+        }
+
+        private void OnInstantMessage(IClientAPI client, GridInstantMessage im)
+        {
+        }
+
+        private void OnGridInstantMessage(GridInstantMessage msg)
+        {
+            // Trigger the above event handler
+            OnInstantMessage(null, msg);
+        }
+
+        private void HandleUUIDGroupNameRequest(UUID id,IClientAPI remote_client)
+        {
+            string groupnamereply = "Unknown";
+            UUID groupUUID = UUID.Zero;
+
+            lock (m_GroupMap)
+            {
+                if (m_GroupMap.ContainsKey(id))
+                {
+                    GroupMembershipData grp = m_GroupMap[id];
+                    groupnamereply = grp.GroupName;
+                    groupUUID = grp.GroupID;
+                }
+            }
+            remote_client.SendGroupNameReply(groupUUID, groupnamereply);
+        }
+
+        private void OnClientClosed(UUID agentID)
+        {
+            lock (m_ClientMap)
+            {
+                if (m_ClientMap.ContainsKey(agentID))
+                {
+//                    IClientAPI cli = m_ClientMap[agentID];
+//                    if (cli != null)
+//                    {
+//                        //m_log.Info("[GROUPS]: Removing all reference to groups for " + cli.Name);
+//                    }
+//                    else
+//                    {
+//                        //m_log.Info("[GROUPS]: Removing all reference to groups for " + agentID.ToString());
+//                    }
+                    m_ClientMap.Remove(agentID);
+                }
+            }
+        }
+    }
+}