9 files changed, 599 insertions, 52 deletions

diff --git a/OpenSim/Region/CoreModules/Avatar/Friends/FriendsModule.cs b/OpenSim/Region/CoreModules/Avatar/Friends/FriendsModule.cs
index 7d94813..f82716d 100644
--- a/OpenSim/Region/CoreModules/Avatar/Friends/FriendsModule.cs
+++ b/OpenSim/Region/CoreModules/Avatar/Friends/FriendsModule.cs
@@ -139,7 +139,6 @@ namespace OpenSim.Region.CoreModules.Avatar.Friends
             if (moduleConfig != null)
             {
                 string name = moduleConfig.GetString("FriendsModule", "FriendsModule");
-                m_log.DebugFormat("[XXX] {0} compared to {1}", name, Name);
                 if (name == Name)
                 {
                     InitModule(config);
@@ -183,7 +182,7 @@ namespace OpenSim.Region.CoreModules.Avatar.Friends
         {
         }
 
-        public void AddRegion(Scene scene)
+        public virtual void AddRegion(Scene scene)
         {
             if (!m_Enabled)
                 return;
@@ -302,6 +301,7 @@ namespace OpenSim.Region.CoreModules.Avatar.Friends
         {
             UUID agentID = client.AgentId;
 
+            //m_log.DebugFormat("[XXX]: OnClientLogin!");
             // Inform the friends that this user is online
             StatusChange(agentID, true);
             
@@ -405,19 +405,22 @@ namespace OpenSim.Region.CoreModules.Avatar.Friends
             }
 
             if (friendList.Count > 0)
-            {
-                PresenceInfo[] presence = PresenceService.GetAgents(friendList.ToArray());
-                foreach (PresenceInfo pi in presence)
-                {
-                    UUID presenceID;
-                    if (UUID.TryParse(pi.UserID, out presenceID))
-                        online.Add(presenceID);
-                }
-            }
+                GetOnlineFriends(userID, friendList, online);
 
             return online;
         }
 
+        protected virtual void GetOnlineFriends(UUID userID, List<string> friendList, /*collector*/ List<UUID> online)
+        {
+            PresenceInfo[] presence = PresenceService.GetAgents(friendList.ToArray());
+            foreach (PresenceInfo pi in presence)
+            {
+                UUID presenceID;
+                if (UUID.TryParse(pi.UserID, out presenceID))
+                    online.Add(presenceID);
+            }
+        }
+
         /// <summary>
         /// Find the client for a ID
         /// </summary>
@@ -472,51 +475,51 @@ namespace OpenSim.Region.CoreModules.Avatar.Friends
                 Util.FireAndForget(
                     delegate
                     {
-                        foreach (FriendInfo fi in friendList)
-                        {
-                            //m_log.DebugFormat("[FRIENDS]: Notifying {0}", fi.PrincipalID);
-                            // Notify about this user status
-                            StatusNotify(fi, agentID, online);
-                        }
+                        m_log.DebugFormat("[FRIENDS MODULE]: Notifying {0} friends", friendList.Count);
+                        // Notify about this user status
+                        StatusNotify(friendList, agentID, online);
                     }
                 );
             }
         }
 
-        private void StatusNotify(FriendInfo friend, UUID userID, bool online)
+        protected virtual void StatusNotify(List<FriendInfo> friendList, UUID userID, bool online)
         {
-            UUID friendID;
-            if (UUID.TryParse(friend.Friend, out friendID))
+            foreach (FriendInfo friend in friendList)
             {
-                // Try local
-                if (LocalStatusNotification(userID, friendID, online))
-                    return;
-
-                // The friend is not here [as root]. Let's forward.
-                PresenceInfo[] friendSessions = PresenceService.GetAgents(new string[] { friendID.ToString() });
-                if (friendSessions != null && friendSessions.Length > 0)
+                UUID friendID;
+                if (UUID.TryParse(friend.Friend, out friendID))
                 {
-                    PresenceInfo friendSession = null; 
-                    foreach (PresenceInfo pinfo in friendSessions)
-                        if (pinfo.RegionID != UUID.Zero) // let's guard against sessions-gone-bad
-                        {
-                            friendSession = pinfo;
-                            break;
-                        }
+                    // Try local
+                    if (LocalStatusNotification(userID, friendID, online))
+                        return;
 
-                    if (friendSession != null)
+                    // The friend is not here [as root]. Let's forward.
+                    PresenceInfo[] friendSessions = PresenceService.GetAgents(new string[] { friendID.ToString() });
+                    if (friendSessions != null && friendSessions.Length > 0)
                     {
-                        GridRegion region = GridService.GetRegionByUUID(m_Scenes[0].RegionInfo.ScopeID, friendSession.RegionID);
-                        //m_log.DebugFormat("[FRIENDS]: Remote Notify to region {0}", region.RegionName);
-                        m_FriendsSimConnector.StatusNotify(region, userID, friendID, online);
+                        PresenceInfo friendSession = null;
+                        foreach (PresenceInfo pinfo in friendSessions)
+                            if (pinfo.RegionID != UUID.Zero) // let's guard against sessions-gone-bad
+                            {
+                                friendSession = pinfo;
+                                break;
+                            }
+
+                        if (friendSession != null)
+                        {
+                            GridRegion region = GridService.GetRegionByUUID(m_Scenes[0].RegionInfo.ScopeID, friendSession.RegionID);
+                            //m_log.DebugFormat("[FRIENDS]: Remote Notify to region {0}", region.RegionName);
+                            m_FriendsSimConnector.StatusNotify(region, userID, friendID, online);
+                        }
                     }
-                }
 
-                // Friend is not online. Ignore.
-            }
-            else
-            {
-                m_log.WarnFormat("[FRIENDS]: Error parsing friend ID {0}", friend.Friend);
+                    // Friend is not online. Ignore.
+                }
+                else
+                {
+                    m_log.WarnFormat("[FRIENDS]: Error parsing friend ID {0}", friend.Friend);
+                }
             }
         }
 
@@ -670,7 +673,6 @@ namespace OpenSim.Region.CoreModules.Avatar.Friends
             FriendInfo[] friends = GetFriends(remoteClient.AgentId);
             if (friends.Length == 0)
             {
-                m_log.DebugFormat("[XXX]: agent {0} has no friends", requester);
                 return;
             }
 
diff --git a/OpenSim/Region/CoreModules/Avatar/Friends/HGFriendsModule.cs b/OpenSim/Region/CoreModules/Avatar/Friends/HGFriendsModule.cs
index c55839f..b0a7567 100644
--- a/OpenSim/Region/CoreModules/Avatar/Friends/HGFriendsModule.cs
+++ b/OpenSim/Region/CoreModules/Avatar/Friends/HGFriendsModule.cs
@@ -46,7 +46,7 @@ using GridRegion = OpenSim.Services.Interfaces.GridRegion;
 namespace OpenSim.Region.CoreModules.Avatar.Friends
 {
     [Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule")]
-    public class HGFriendsModule : FriendsModule, ISharedRegionModule, IFriendsModule
+    public class HGFriendsModule : FriendsModule, ISharedRegionModule, IFriendsModule, IFriendsSimConnector
     {
         private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
 
@@ -56,6 +56,31 @@ namespace OpenSim.Region.CoreModules.Avatar.Friends
             get { return "HGFriendsModule"; }
         }
 
+        public override void AddRegion(Scene scene)
+        {
+            if (!m_Enabled)
+                return;
+
+            base.AddRegion(scene);
+            scene.RegisterModuleInterface<IFriendsSimConnector>(this);
+        }
+
+        #endregion
+
+        #region IFriendsSimConnector
+
+        /// <summary>
+        /// Notify the user that the friend's status changed
+        /// </summary>
+        /// <param name="userID">user to be notified</param>
+        /// <param name="friendID">friend whose status changed</param>
+        /// <param name="online">status</param>
+        /// <returns></returns>
+        public bool StatusNotify(UUID userID, UUID friendID, bool online)
+        {
+            return LocalStatusNotification(friendID, userID, online);
+        }
+
         #endregion
 
         protected override bool FetchFriendslist(IClientAPI client)
@@ -103,6 +128,140 @@ namespace OpenSim.Region.CoreModules.Avatar.Friends
             return false;
         }
 
+        protected override void GetOnlineFriends(UUID userID, List<string> friendList, /*collector*/ List<UUID> online)
+        {
+            // Let's single out the UUIs
+            List<string> localFriends = new List<string>();
+            List<string> foreignFriends = new List<string>();
+            string tmp = string.Empty;
+
+            foreach (string s in friendList)
+            {
+                UUID id;
+                if (UUID.TryParse(s, out id))
+                    localFriends.Add(s);
+                else if (Util.ParseUniversalUserIdentifier(s, out id, out tmp, out tmp, out tmp, out tmp))
+                {
+                    foreignFriends.Add(s);
+                    // add it here too, who knows maybe the foreign friends happens to be on this grid
+                    localFriends.Add(id.ToString());
+                }
+            }
+
+            // OK, see who's present on this grid
+            List<string> toBeRemoved = new List<string>();
+            PresenceInfo[] presence = PresenceService.GetAgents(localFriends.ToArray());
+            foreach (PresenceInfo pi in presence)
+            {
+                UUID presenceID;
+                if (UUID.TryParse(pi.UserID, out presenceID))
+                {
+                    online.Add(presenceID);
+                    foreach (string s in foreignFriends)
+                        if (s.StartsWith(pi.UserID))
+                            toBeRemoved.Add(s);
+                }
+            }
+
+            foreach (string s in toBeRemoved)
+                foreignFriends.Remove(s);
+
+            // OK, let's send this up the stack, and leave a closure here
+            // collecting online friends in other grids
+            Util.FireAndForget(delegate { CollectOnlineFriendsElsewhere(userID, foreignFriends); });
+
+        }
+
+        private void CollectOnlineFriendsElsewhere(UUID userID, List<string> foreignFriends)
+        {
+            // let's divide the friends on a per-domain basis
+            Dictionary<string, List<string>> friendsPerDomain = new Dictionary<string, List<string>>();
+            foreach (string friend in foreignFriends)
+            {
+                UUID friendID;
+                if (!UUID.TryParse(friend, out friendID))
+                {
+                    // it's a foreign friend
+                    string url = string.Empty, tmp = string.Empty;
+                    if (Util.ParseUniversalUserIdentifier(friend, out friendID, out url, out tmp, out tmp, out tmp))
+                    {
+                        if (!friendsPerDomain.ContainsKey(url))
+                            friendsPerDomain[url] = new List<string>();
+                        friendsPerDomain[url].Add(friend);
+                    }
+                }
+            }
+
+            // Now, call those worlds
+            
+            foreach (KeyValuePair<string, List<string>> kvp in friendsPerDomain)
+            {
+                List<string> ids = new List<string>();
+                foreach (string f in kvp.Value)
+                    ids.Add(f);
+                UserAgentServiceConnector uConn = new UserAgentServiceConnector(kvp.Key);
+                List<UUID> online = uConn.GetOnlineFriends(userID, ids);
+                // Finally send the notifications to the user
+                // this whole process may take a while, so let's check at every
+                // iteration that the user is still here
+                IClientAPI client = LocateClientObject(userID);
+                if (client != null)
+                    client.SendAgentOnline(online.ToArray());
+                else
+                    break;
+            }
+
+        }
+
+        protected override void StatusNotify(List<FriendInfo> friendList, UUID userID, bool online)
+        {
+            // First, let's divide the friends on a per-domain basis
+            Dictionary<string, List<FriendInfo>> friendsPerDomain = new Dictionary<string, List<FriendInfo>>();
+            foreach (FriendInfo friend in friendList)
+            {
+                UUID friendID;
+                if (UUID.TryParse(friend.Friend, out friendID))
+                {
+                    if (!friendsPerDomain.ContainsKey("local"))
+                        friendsPerDomain["local"] = new List<FriendInfo>();
+                    friendsPerDomain["local"].Add(friend);
+                }
+                else
+                {
+                    // it's a foreign friend
+                    string url = string.Empty, tmp = string.Empty;
+                    if (Util.ParseUniversalUserIdentifier(friend.Friend, out friendID, out url, out tmp, out tmp, out tmp))
+                    {
+                        // Let's try our luck in the local sim. Who knows, maybe it's here
+                        if (LocalStatusNotification(userID, friendID, online))
+                            continue;
+
+                        if (!friendsPerDomain.ContainsKey(url))
+                            friendsPerDomain[url] = new List<FriendInfo>();
+                        friendsPerDomain[url].Add(friend);
+                    }
+                }
+            }
+
+            // For the local friends, just call the base method
+            // Let's do this first of all
+            if (friendsPerDomain.ContainsKey("local"))
+                base.StatusNotify(friendsPerDomain["local"], userID, online);
+
+            foreach (KeyValuePair<string, List<FriendInfo>> kvp in friendsPerDomain)
+            {
+                if (kvp.Key != "local")
+                {
+                    // For the others, call the user agent service 
+                    List<string> ids = new List<string>();
+                    foreach (FriendInfo f in kvp.Value)
+                        ids.Add(f.Friend);
+                    UserAgentServiceConnector uConn = new UserAgentServiceConnector(kvp.Key);
+                    uConn.StatusNotification(ids, userID, online);
+                }
+            }
+        }
+
         protected override bool GetAgentInfo(UUID scopeID, string fid, out UUID agentID, out string first, out string last)
         {
             first = "Unknown"; last = "User";
@@ -172,7 +331,6 @@ namespace OpenSim.Region.CoreModules.Avatar.Friends
             {
                 string agentUUI = Util.ProduceUserUniversalIdentifier(agentClientCircuit);
 
-                m_log.DebugFormat("[XXX] GetFriendsFromService to {0}", agentUUI);
                 finfos = FriendsService.GetFriends(agentUUI);
                 m_log.DebugFormat("[HGFRIENDS MODULE]: Fetched {0} local friends for visitor {1}", finfos.Length, agentUUI);
             }
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsIn/Hypergrid/HypergridServiceInConnectorModule.cs b/OpenSim/Region/CoreModules/ServiceConnectorsIn/Hypergrid/HypergridServiceInConnectorModule.cs
index f5b6817..a5b5637 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsIn/Hypergrid/HypergridServiceInConnectorModule.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsIn/Hypergrid/HypergridServiceInConnectorModule.cs
@@ -113,7 +113,8 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsIn.Hypergrid
                 ISimulationService simService = scene.RequestModuleInterface<ISimulationService>();
                 m_HypergridHandler = new GatekeeperServiceInConnector(m_Config, MainServer.Instance, simService);
 
-                new UserAgentServerConnector(m_Config, MainServer.Instance);
+                IFriendsSimConnector friendsConn = scene.RequestModuleInterface<IFriendsSimConnector>();
+                new UserAgentServerConnector(m_Config, MainServer.Instance, friendsConn);
                 new HeloServiceInConnector(m_Config, MainServer.Instance, "HeloService");
                 new HGFriendsServerConnector(m_Config, MainServer.Instance, "HGFriendsService");
             }
diff --git a/OpenSim/Server/Handlers/Hypergrid/HGFriendsServerPostHandler.cs b/OpenSim/Server/Handlers/Hypergrid/HGFriendsServerPostHandler.cs
index a83d0e8..841811e 100644
--- a/OpenSim/Server/Handlers/Hypergrid/HGFriendsServerPostHandler.cs
+++ b/OpenSim/Server/Handlers/Hypergrid/HGFriendsServerPostHandler.cs
@@ -140,16 +140,20 @@ namespace OpenSim.Server.Handlers.Hypergrid
 
         byte[] NewFriendship(Dictionary<string, object> request)
         {
+            m_log.DebugFormat("[XXX] 1");
             if (!VerifyServiceKey(request))
                 return FailureResult();
 
+            m_log.DebugFormat("[XXX] 2");
             // OK, can proceed
             FriendInfo friend = new FriendInfo(request);
             UUID friendID;
             string tmp = string.Empty;
+            m_log.DebugFormat("[XXX] 3");
             if (!Util.ParseUniversalUserIdentifier(friend.Friend, out friendID, out tmp, out tmp, out tmp, out tmp))
                 return FailureResult();
 
+
             m_log.DebugFormat("[HGFRIENDS HANDLER]: New friendship {0} {1}", friend.PrincipalID, friend.Friend);
 
             // If the friendship already exists, return fail
diff --git a/OpenSim/Server/Handlers/Hypergrid/UserAgentServerConnector.cs b/OpenSim/Server/Handlers/Hypergrid/UserAgentServerConnector.cs
index 0e8ce80..7a9fb4b 100644
--- a/OpenSim/Server/Handlers/Hypergrid/UserAgentServerConnector.cs
+++ b/OpenSim/Server/Handlers/Hypergrid/UserAgentServerConnector.cs
@@ -54,13 +54,19 @@ namespace OpenSim.Server.Handlers.Hypergrid
         private IUserAgentService m_HomeUsersService;
 
         public UserAgentServerConnector(IConfigSource config, IHttpServer server) :
+                this(config, server, null)
+        {            
+        }
+
+        public UserAgentServerConnector(IConfigSource config, IHttpServer server, IFriendsSimConnector friendsConnector) :
                 base(config, server, String.Empty)
         {
             IConfig gridConfig = config.Configs["UserAgentService"];
             if (gridConfig != null)
             {
                 string serviceDll = gridConfig.GetString("LocalServiceModule", string.Empty);
-                Object[] args = new Object[] { config };
+
+                Object[] args = new Object[] { config, friendsConnector };
                 m_HomeUsersService = ServerUtils.LoadPlugin<IUserAgentService>(serviceDll, args);
             }
             if (m_HomeUsersService == null)
@@ -75,6 +81,9 @@ namespace OpenSim.Server.Handlers.Hypergrid
             server.AddXmlRPCHandler("verify_client", VerifyClient, false);
             server.AddXmlRPCHandler("logout_agent", LogoutAgent, false);
 
+            server.AddXmlRPCHandler("status_notification", StatusNotification, false);
+            server.AddXmlRPCHandler("get_online_friends", GetOnlineFriends, false);
+
             server.AddHTTPHandler("/homeagent/", new HomeAgentHandler(m_HomeUsersService, loginServerIP, proxy).Handler);
         }
 
@@ -194,5 +203,78 @@ namespace OpenSim.Server.Handlers.Hypergrid
 
         }
 
+        public XmlRpcResponse StatusNotification(XmlRpcRequest request, IPEndPoint remoteClient)
+        {
+            Hashtable hash = new Hashtable();
+            hash["result"] = "false";
+
+            Hashtable requestData = (Hashtable)request.Params[0];
+            //string host = (string)requestData["host"];
+            //string portstr = (string)requestData["port"];
+            if (requestData.ContainsKey("userID") && requestData.ContainsKey("online"))
+            {
+                string userID_str = (string)requestData["userID"];
+                UUID userID = UUID.Zero;
+                UUID.TryParse(userID_str, out userID);
+                List<string> ids = new List<string>();
+                foreach (object key in requestData.Keys)
+                {
+                    if (key is string && ((string)key).StartsWith("friend_") && requestData[key] != null)
+                        ids.Add(requestData[key].ToString());
+                }
+                bool online = false;
+                bool.TryParse(requestData["online"].ToString(), out online);
+
+                hash["result"] = "true";
+
+                // let's spawn a thread for this, because it may take a long time...
+                Util.FireAndForget(delegate { m_HomeUsersService.StatusNotification(ids, userID, online); });
+            }
+
+            XmlRpcResponse response = new XmlRpcResponse();
+            response.Value = hash;
+            return response;
+
+        }
+
+        public XmlRpcResponse GetOnlineFriends(XmlRpcRequest request, IPEndPoint remoteClient)
+        {
+            Hashtable hash = new Hashtable();
+
+            Hashtable requestData = (Hashtable)request.Params[0];
+            //string host = (string)requestData["host"];
+            //string portstr = (string)requestData["port"];
+            if (requestData.ContainsKey("userID"))
+            {
+                string userID_str = (string)requestData["userID"];
+                UUID userID = UUID.Zero;
+                UUID.TryParse(userID_str, out userID);
+                List<string> ids = new List<string>();
+                foreach (object key in requestData.Keys)
+                {
+                    if (key is string && ((string)key).StartsWith("friend_") && requestData[key] != null)
+                        ids.Add(requestData[key].ToString());
+                }
+
+                // let's spawn a thread for this, because it may take a long time...
+                List<UUID> online = m_HomeUsersService.GetOnlineFriends(userID, ids);
+                if (online.Count > 0)
+                {
+                    int i = 0;
+                    foreach (UUID id in online)
+                    {
+                        hash["friend_" + i.ToString()] = id.ToString();
+                        i++;
+                    }
+
+                }
+            }
+
+            XmlRpcResponse response = new XmlRpcResponse();
+            response.Value = hash;
+            return response;
+
+        }
+
     }
 }
diff --git a/OpenSim/Services/Connectors/Hypergrid/UserAgentServiceConnector.cs b/OpenSim/Services/Connectors/Hypergrid/UserAgentServiceConnector.cs
index c40a347..46d30df 100644
--- a/OpenSim/Services/Connectors/Hypergrid/UserAgentServiceConnector.cs
+++ b/OpenSim/Services/Connectors/Hypergrid/UserAgentServiceConnector.cs
@@ -404,6 +404,97 @@ namespace OpenSim.Services.Connectors.Hypergrid
             GetBoolResponse(request, out reason);
         }
 
+        public void StatusNotification(List<string> friends, UUID userID, bool online)
+        {
+            Hashtable hash = new Hashtable();
+            hash["userID"] = userID.ToString();
+            hash["online"] = online.ToString();
+            int i = 0;
+            foreach (string s in friends)
+            {
+                hash["friend_" + i.ToString()] = s;
+                i++;
+            }
+
+            IList paramList = new ArrayList();
+            paramList.Add(hash);
+
+            XmlRpcRequest request = new XmlRpcRequest("status_notification", paramList);
+            string reason = string.Empty;
+            GetBoolResponse(request, out reason);
+
+        }
+
+        public List<UUID> GetOnlineFriends(UUID userID, List<string> friends)
+        {
+            Hashtable hash = new Hashtable();
+            hash["userID"] = userID.ToString();
+            int i = 0;
+            foreach (string s in friends)
+            {
+                hash["friend_" + i.ToString()] = s;
+                i++;
+            }
+
+            IList paramList = new ArrayList();
+            paramList.Add(hash);
+
+            XmlRpcRequest request = new XmlRpcRequest("get_online_friends", paramList);
+            string reason = string.Empty;
+            
+            // Send and get reply
+            List<UUID> online = new List<UUID>();
+            XmlRpcResponse response = null;
+            try
+            {
+                response = request.Send(m_ServerURL, 10000);
+            }
+            catch (Exception e)
+            {
+                m_log.DebugFormat("[USER AGENT CONNECTOR]: Unable to contact remote server {0}", m_ServerURL);
+                reason = "Exception: " + e.Message;
+                return online;
+            }
+
+            if (response.IsFault)
+            {
+                m_log.ErrorFormat("[USER AGENT CONNECTOR]: remote call to {0} returned an error: {1}", m_ServerURL, response.FaultString);
+                reason = "XMLRPC Fault";
+                return online;
+            }
+
+            hash = (Hashtable)response.Value;
+            //foreach (Object o in hash)
+            //    m_log.Debug(">> " + ((DictionaryEntry)o).Key + ":" + ((DictionaryEntry)o).Value);
+            try
+            {
+                if (hash == null)
+                {
+                    m_log.ErrorFormat("[USER AGENT CONNECTOR]: Got null response from {0}! THIS IS BAAAAD", m_ServerURL);
+                    reason = "Internal error 1";
+                    return online;
+                }
+
+                // Here is the actual response
+                foreach (object key in hash.Keys)
+                {
+                    if (key is string && ((string)key).StartsWith("friend_") && hash[key] != null)
+                    {
+                        UUID uuid;
+                        if (UUID.TryParse(hash[key].ToString(), out uuid))
+                            online.Add(uuid);
+                    }
+                }
+
+            }
+            catch (Exception e)
+            {
+                m_log.ErrorFormat("[USER AGENT CONNECTOR]: Got exception on GetOnlineFriends response.");
+                reason = "Exception: " + e.Message;
+            }
+
+            return online;
+        }
 
         private bool GetBoolResponse(XmlRpcRequest request, out string reason)
         {
diff --git a/OpenSim/Services/HypergridService/UserAgentService.cs b/OpenSim/Services/HypergridService/UserAgentService.cs
index 445d45e..0181533 100644
--- a/OpenSim/Services/HypergridService/UserAgentService.cs
+++ b/OpenSim/Services/HypergridService/UserAgentService.cs
@@ -31,10 +31,12 @@ using System.Net;
 using System.Reflection;
 
 using OpenSim.Framework;
+using OpenSim.Services.Connectors.Friends;
 using OpenSim.Services.Connectors.Hypergrid;
 using OpenSim.Services.Interfaces;
 using GridRegion = OpenSim.Services.Interfaces.GridRegion;
 using OpenSim.Server.Base;
+using FriendInfo = OpenSim.Services.Interfaces.FriendInfo;
 
 using OpenMetaverse;
 using log4net;
@@ -63,19 +65,34 @@ namespace OpenSim.Services.HypergridService
         protected static IGridService m_GridService;
         protected static GatekeeperServiceConnector m_GatekeeperConnector;
         protected static IGatekeeperService m_GatekeeperService;
+        protected static IFriendsService m_FriendsService;
+        protected static IPresenceService m_PresenceService;
+        protected static IFriendsSimConnector m_FriendsLocalSimConnector; // standalone, points to HGFriendsModule
+        protected static FriendsSimConnector m_FriendsSimConnector; // grid
 
         protected static string m_GridName;
 
         protected static bool m_BypassClientVerification;
 
-        public UserAgentService(IConfigSource config)
+        public UserAgentService(IConfigSource config) : this(config, null)
         {
+        }
+
+        public UserAgentService(IConfigSource config, IFriendsSimConnector friendsConnector)
+        {
+            // Let's set this always, because we don't know the sequence
+            // of instantiations
+            if (friendsConnector != null)
+                m_FriendsLocalSimConnector = friendsConnector;
+
             if (!m_Initialized)
             {
                 m_Initialized = true;
 
                 m_log.DebugFormat("[HOME USERS SECURITY]: Starting...");
-                
+
+                m_FriendsSimConnector = new FriendsSimConnector();
+
                 IConfig serverConfig = config.Configs["UserAgentService"];
                 if (serverConfig == null)
                     throw new Exception(String.Format("No section UserAgentService in config file"));
@@ -83,6 +100,8 @@ namespace OpenSim.Services.HypergridService
                 string gridService = serverConfig.GetString("GridService", String.Empty);
                 string gridUserService = serverConfig.GetString("GridUserService", String.Empty);
                 string gatekeeperService = serverConfig.GetString("GatekeeperService", String.Empty);
+                string friendsService = serverConfig.GetString("FriendsService", String.Empty);
+                string presenceService = serverConfig.GetString("PresenceService", String.Empty);
 
                 m_BypassClientVerification = serverConfig.GetBoolean("BypassClientVerification", false);
 
@@ -94,6 +113,8 @@ namespace OpenSim.Services.HypergridService
                 m_GridUserService = ServerUtils.LoadPlugin<IGridUserService>(gridUserService, args);
                 m_GatekeeperConnector = new GatekeeperServiceConnector();
                 m_GatekeeperService = ServerUtils.LoadPlugin<IGatekeeperService>(gatekeeperService, args);
+                m_FriendsService = ServerUtils.LoadPlugin<IFriendsService>(friendsService, args);
+                m_PresenceService = ServerUtils.LoadPlugin<IPresenceService>(presenceService, args);
 
                 m_GridName = serverConfig.GetString("ExternalName", string.Empty);
                 if (m_GridName == string.Empty)
@@ -156,11 +177,16 @@ namespace OpenSim.Services.HypergridService
             string gridName = gatekeeper.ServerURI;
 
             m_log.DebugFormat("[USER AGENT SERVICE]: this grid: {0}, desired grid: {1}", m_GridName, gridName);
-            
+
             if (m_GridName == gridName)
                 success = m_GatekeeperService.LoginAgent(agentCircuit, finalDestination, out reason);
             else
+            {
                 success = m_GatekeeperConnector.CreateAgent(region, agentCircuit, (uint)Constants.TeleportFlags.ViaLogin, out myExternalIP, out reason);
+                if (success)
+                    // Report them as nowhere
+                    m_PresenceService.ReportAgent(agentCircuit.SessionID, UUID.Zero);
+            }
 
             if (!success)
             {
@@ -179,6 +205,7 @@ namespace OpenSim.Services.HypergridService
             if (clientIP != null)
                 m_TravelingAgents[agentCircuit.SessionID].ClientIPAddress = clientIP.Address.ToString();
             m_TravelingAgents[agentCircuit.SessionID].MyIpAddress = myExternalIP;
+
             return true;
         }
 
@@ -291,6 +318,145 @@ namespace OpenSim.Services.HypergridService
             return false;
         }
 
+        public void StatusNotification(List<string> friends, UUID foreignUserID, bool online)
+        {
+            if (m_FriendsService == null || m_PresenceService == null)
+            {
+                m_log.WarnFormat("[USER AGENT SERVICE]: Unable to perform status notifications because friends or presence services are missing");
+                return;
+            }
+
+            m_log.DebugFormat("[USER AGENT SERVICE]: Status notification: foreign user {0} wants to notify {1} local friends", foreignUserID, friends.Count);
+
+            // First, let's double check that the reported friends are, indeed, friends of that user
+            // And let's check that the secret matches
+            List<string> usersToBeNotified = new List<string>();
+            foreach (string uui in friends)
+            {
+                UUID localUserID;
+                string secret = string.Empty, tmp = string.Empty;
+                if (Util.ParseUniversalUserIdentifier(uui, out localUserID, out tmp, out tmp, out tmp, out secret))
+                {
+                    FriendInfo[] friendInfos = m_FriendsService.GetFriends(localUserID);
+                    foreach (FriendInfo finfo in friendInfos)
+                    {
+                        if (finfo.Friend.StartsWith(foreignUserID.ToString()) && finfo.Friend.EndsWith(secret))
+                        {
+                            // great!
+                            usersToBeNotified.Add(localUserID.ToString());
+                        }
+                    }
+                }
+            }
+
+            // Now, let's send the notifications
+            m_log.DebugFormat("[USER AGENT SERVICE]: Status notification: user has {0} local friends", usersToBeNotified.Count);
+
+            // First, let's send notifications to local users who are online in the home grid
+            PresenceInfo[] friendSessions = m_PresenceService.GetAgents(usersToBeNotified.ToArray());
+            if (friendSessions != null && friendSessions.Length > 0)
+            {
+                PresenceInfo friendSession = null;
+                foreach (PresenceInfo pinfo in friendSessions)
+                    if (pinfo.RegionID != UUID.Zero) // let's guard against traveling agents
+                    {
+                        friendSession = pinfo;
+                        break;
+                    }
+
+                if (friendSession != null)
+                {
+                    ForwardStatusNotificationToSim(friendSession.RegionID, friendSession.UserID, foreignUserID, online);
+                    usersToBeNotified.Remove(friendSession.UserID.ToString());
+                }
+            }
+
+            // Lastly, let's notify the rest who may be online somewhere else
+            foreach (string user in usersToBeNotified)
+            {
+                UUID id = new UUID(user);
+                if (m_TravelingAgents.ContainsKey(id) && m_TravelingAgents[id].GridExternalName != m_GridName)
+                {
+                    string url = m_TravelingAgents[id].GridExternalName;
+                    // forward
+                    m_log.WarnFormat("[USER AGENT SERVICE]: User {0} is visiting {1}. HG Status notifications still not implemented.", user, url);
+                }
+            }
+        }
+
+        protected void ForwardStatusNotificationToSim(UUID regionID, string user, UUID foreignUserID, bool online)
+        {
+            UUID userID;
+            if (UUID.TryParse(user, out userID))
+            {
+                if (m_FriendsLocalSimConnector != null)
+                {
+                    m_log.DebugFormat("[USER AGENT SERVICE]: Local Notify, user {0} is {1}", foreignUserID, (online ? "online" : "offline"));
+                    m_FriendsLocalSimConnector.StatusNotify(userID, foreignUserID, online);
+                }
+                else
+                {
+                    GridRegion region = m_GridService.GetRegionByUUID(UUID.Zero /* !!! */, regionID);
+                    if (region != null)
+                    {
+                        m_log.DebugFormat("[USER AGENT SERVICE]: Remote Notify to region {0}, user {1} is {2}", region.RegionName, user, foreignUserID, (online ? "online" : "offline"));
+                        m_FriendsSimConnector.StatusNotify(region, userID, foreignUserID, online);
+                    }
+                }
+            }
+        }
+
+        public List<UUID> GetOnlineFriends(UUID foreignUserID, List<string> friends)
+        {
+            List<UUID> online = new List<UUID>();
+
+            if (m_FriendsService == null || m_PresenceService == null)
+            {
+                m_log.WarnFormat("[USER AGENT SERVICE]: Unable to get online friends because friends or presence services are missing");
+                return online;
+            }
+
+            m_log.DebugFormat("[USER AGENT SERVICE]: Foreign user {0} wants to know status of {1} local friends", foreignUserID, friends.Count);
+
+            // First, let's double check that the reported friends are, indeed, friends of that user
+            // And let's check that the secret matches and the rights
+            List<string> usersToBeNotified = new List<string>();
+            foreach (string uui in friends)
+            {
+                UUID localUserID;
+                string secret = string.Empty, tmp = string.Empty;
+                if (Util.ParseUniversalUserIdentifier(uui, out localUserID, out tmp, out tmp, out tmp, out secret))
+                {
+                    FriendInfo[] friendInfos = m_FriendsService.GetFriends(localUserID);
+                    foreach (FriendInfo finfo in friendInfos)
+                    {
+                        if (finfo.Friend.StartsWith(foreignUserID.ToString()) && finfo.Friend.EndsWith(secret) && 
+                            (finfo.TheirFlags & (int)FriendRights.CanSeeOnline) != 0 && (finfo.TheirFlags != -1))
+                        {
+                            // great!
+                            usersToBeNotified.Add(localUserID.ToString());
+                        }
+                    }
+                }
+            }
+
+            // Now, let's find out their status
+            m_log.DebugFormat("[USER AGENT SERVICE]: GetOnlineFriends: user has {0} local friends with status rights", usersToBeNotified.Count);
+
+            // First, let's send notifications to local users who are online in the home grid
+            PresenceInfo[] friendSessions = m_PresenceService.GetAgents(usersToBeNotified.ToArray());
+            if (friendSessions != null && friendSessions.Length > 0)
+            {
+                foreach (PresenceInfo pi in friendSessions)
+                {
+                    UUID presenceID;
+                    if (UUID.TryParse(pi.UserID, out presenceID))
+                        online.Add(presenceID);
+                }
+            }
+
+            return online;
+        }
     }
 
     class TravelingAgentInfo
diff --git a/OpenSim/Services/Interfaces/IGatekeeperService.cs b/OpenSim/Services/Interfaces/IGatekeeperService.cs
index aac8293..fa1ab1c 100644
--- a/OpenSim/Services/Interfaces/IGatekeeperService.cs
+++ b/OpenSim/Services/Interfaces/IGatekeeperService.cs
@@ -55,6 +55,9 @@ namespace OpenSim.Services.Interfaces
         void LogoutAgent(UUID userID, UUID sessionID);
         GridRegion GetHomeRegion(UUID userID, out Vector3 position, out Vector3 lookAt);
 
+        void StatusNotification(List<string> friends, UUID userID, bool online);
+        List<UUID> GetOnlineFriends(UUID userID, List<string> friends);
+
         bool AgentIsComingHome(UUID sessionID, string thisGridExternalName);
         bool VerifyAgent(UUID sessionID, string token);
         bool VerifyClient(UUID sessionID, string reportedIP);
diff --git a/OpenSim/Services/Interfaces/ISimulatorSocialService.cs b/OpenSim/Services/Interfaces/ISimulatorSocialService.cs
new file mode 100644
index 0000000..0b7aefc
--- /dev/null
+++ b/OpenSim/Services/Interfaces/ISimulatorSocialService.cs
@@ -0,0 +1,40 @@
+/*
+ * 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 OpenSimulator 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 OpenSim.Framework;
+using OpenMetaverse;
+
+using GridRegion = OpenSim.Services.Interfaces.GridRegion;
+
+namespace OpenSim.Services.Interfaces
+{
+    public interface IFriendsSimConnector
+    {
+        bool StatusNotify(UUID userID, UUID friendID, bool online);
+    }
+}