2 files changed, 538 insertions, 3 deletions

diff --git a/OpenSim/Services/HypergridService/HGInstantMessageService.cs b/OpenSim/Services/HypergridService/HGInstantMessageService.cs
new file mode 100644
index 0000000..ca0fd7f
--- /dev/null
+++ b/OpenSim/Services/HypergridService/HGInstantMessageService.cs
@@ -0,0 +1,317 @@
+/*
+ * 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 System.Collections.Generic;
+using System.Net;
+using System.Reflection;
+
+using OpenSim.Framework;
+using OpenSim.Services.Connectors.Friends;
+using OpenSim.Services.Connectors.Hypergrid;
+using OpenSim.Services.Interfaces;
+using OpenSim.Services.Connectors.InstantMessage;
+using GridRegion = OpenSim.Services.Interfaces.GridRegion;
+using OpenSim.Server.Base;
+using FriendInfo = OpenSim.Services.Interfaces.FriendInfo;
+
+using OpenMetaverse;
+using log4net;
+using Nini.Config;
+
+namespace OpenSim.Services.HypergridService
+{
+    /// <summary>
+    /// Inter-grid IM
+    /// </summary>
+    public class HGInstantMessageService : IInstantMessage
+    {
+        private static readonly ILog m_log =
+                LogManager.GetLogger(
+                MethodBase.GetCurrentMethod().DeclaringType);
+
+        private const double CACHE_EXPIRATION_SECONDS = 120000.0; // 33 hours
+
+        static bool m_Initialized = false;
+
+        protected static IGridService m_GridService;
+        protected static IPresenceService m_PresenceService;
+        protected static IUserAgentService m_UserAgentService;
+
+        protected static IInstantMessageSimConnector m_IMSimConnector;
+
+        protected static Dictionary<UUID, object> m_UserLocationMap = new Dictionary<UUID, object>();
+        private static ExpiringCache<UUID, GridRegion> m_RegionCache;
+
+        public HGInstantMessageService(IConfigSource config)
+            : this(config, null)
+        {
+        }
+
+        public HGInstantMessageService(IConfigSource config, IInstantMessageSimConnector imConnector)
+        {
+            if (imConnector != null)
+                m_IMSimConnector = imConnector;
+
+            if (!m_Initialized)
+            {
+                m_Initialized = true;
+
+                m_log.DebugFormat("[HG IM SERVICE]: Starting...");
+
+                IConfig serverConfig = config.Configs["HGInstantMessageService"];
+                if (serverConfig == null)
+                    throw new Exception(String.Format("No section HGInstantMessageService in config file"));
+
+                string gridService = serverConfig.GetString("GridService", String.Empty);
+                string presenceService = serverConfig.GetString("PresenceService", String.Empty);
+                string userAgentService = serverConfig.GetString("UserAgentService", String.Empty);
+
+                if (gridService == string.Empty || presenceService == string.Empty)
+                    throw new Exception(String.Format("Incomplete specifications, InstantMessage Service cannot function."));
+
+                Object[] args = new Object[] { config };
+                m_GridService = ServerUtils.LoadPlugin<IGridService>(gridService, args);
+                m_PresenceService = ServerUtils.LoadPlugin<IPresenceService>(presenceService, args);
+                m_UserAgentService = ServerUtils.LoadPlugin<IUserAgentService>(userAgentService, args);
+
+                m_RegionCache = new ExpiringCache<UUID, GridRegion>();
+
+            }
+        }
+
+        public bool IncomingInstantMessage(GridInstantMessage im)
+        {
+            m_log.DebugFormat("[HG IM SERVICE]: Received message {0} from {1} to {2}", im.message, im.fromAgentID, im.toAgentID);
+            UUID toAgentID = new UUID(im.toAgentID);
+
+            if (m_IMSimConnector != null)
+            {
+                m_log.DebugFormat("[XXX] SendIMToRegion local im connector");
+                return m_IMSimConnector.SendInstantMessage(im);
+            }
+            else
+                return TrySendInstantMessage(im, "", true); 
+        }
+
+        public bool OutgoingInstantMessage(GridInstantMessage im, string url)
+        {
+            m_log.DebugFormat("[HG IM SERVICE]: Sending message {0} from {1} to {2}@{3}", im.message, im.fromAgentID, im.toAgentID, url);
+            if (url != string.Empty)
+                return TrySendInstantMessage(im, url, true);
+            else
+            {
+                PresenceInfo upd = new PresenceInfo();
+                upd.RegionID = UUID.Zero;
+                return TrySendInstantMessage(im, upd, true);
+            }
+        }
+
+        protected bool TrySendInstantMessage(GridInstantMessage im, object previousLocation, bool firstTime)
+        {
+            UUID toAgentID = new UUID(im.toAgentID);
+
+            PresenceInfo upd = null;
+            string url = string.Empty;
+
+            bool lookupAgent = false;
+
+            lock (m_UserLocationMap)
+            {
+                if (m_UserLocationMap.ContainsKey(toAgentID))
+                {
+                    object o = m_UserLocationMap[toAgentID];
+                    if (o is PresenceInfo)
+                        upd = (PresenceInfo)o;
+                    else if (o is string)
+                        url = (string)o;
+
+                    // We need to compare the current location with the previous 
+                    // or the recursive loop will never end because it will never try to lookup the agent again
+                    if (!firstTime)
+                    {
+                        lookupAgent = true;
+                        upd = null;
+                        url = string.Empty;
+                    }
+                }
+                else
+                {
+                    lookupAgent = true;
+                }
+            }
+
+            m_log.DebugFormat("[XXX] Neeed lookup ? {0}", (lookupAgent ? "yes" : "no"));
+
+            // Are we needing to look-up an agent?
+            if (lookupAgent)
+            {
+                // Non-cached user agent lookup.
+                PresenceInfo[] presences = m_PresenceService.GetAgents(new string[] { toAgentID.ToString() });
+                if (presences != null && presences.Length > 0)
+                {
+                    foreach (PresenceInfo p in presences)
+                    {
+                        if (p.RegionID != UUID.Zero)
+                        {
+                            m_log.DebugFormat("[XXX]: Found presence in {0}", p.RegionID);
+                            upd = p;
+                            break;
+                        }
+                    }
+                }
+
+                if (upd == null)
+                {
+                    // Let's check with the UAS if the user is elsewhere
+                    m_log.DebugFormat("[HG IM SERVICE]: User is not present. Checking location with User Agent service");
+                    url = m_UserAgentService.LocateUser(toAgentID);
+                }
+
+                if (upd != null || url != string.Empty)
+                {
+                    // check if we've tried this before..
+                    // This is one way to end the recursive loop
+                    //
+                    if (!firstTime && ((previousLocation is PresenceInfo && upd != null && upd.RegionID == ((PresenceInfo)previousLocation).RegionID) ||
+                                        (previousLocation is string && upd == null && previousLocation.Equals(url))))
+                    {
+                        // m_log.Error("[GRID INSTANT MESSAGE]: Unable to deliver an instant message");
+                        m_log.DebugFormat("[HG IM SERVICE]: Fail 2 {0} {1}", previousLocation, url);
+
+                        return false;
+                    }
+                }
+            }
+
+            if (upd != null)
+            {
+                // ok, the user is around somewhere. Let's send back the reply with "success"
+                // even though the IM may still fail. Just don't keep the caller waiting for
+                // the entire time we're trying to deliver the IM
+                return SendIMToRegion(upd, im, toAgentID);
+            }
+            else if (url != string.Empty)
+            {
+                // ok, the user is around somewhere. Let's send back the reply with "success"
+                // even though the IM may still fail. Just don't keep the caller waiting for
+                // the entire time we're trying to deliver the IM
+                return ForwardIMToGrid(url, im, toAgentID);
+            }
+            else if (firstTime && previousLocation is string && (string)previousLocation != string.Empty)
+            {
+                return ForwardIMToGrid((string)previousLocation, im, toAgentID);
+            }
+            else
+                m_log.DebugFormat("[HG IM SERVICE]: Unable to locate user {0}", toAgentID);
+            return false;
+        }
+
+        bool SendIMToRegion(PresenceInfo upd, GridInstantMessage im, UUID toAgentID)
+        {
+            bool imresult = false;
+            GridRegion reginfo = null;
+            if (!m_RegionCache.TryGetValue(upd.RegionID, out reginfo))
+            {
+                reginfo = m_GridService.GetRegionByUUID(UUID.Zero /*!!!*/, upd.RegionID);
+                if (reginfo != null)
+                    m_RegionCache.AddOrUpdate(upd.RegionID, reginfo, CACHE_EXPIRATION_SECONDS);
+            }
+
+            if (reginfo != null)
+            {
+                imresult = InstantMessageServiceConnector.SendInstantMessage(reginfo.ServerURI, im);
+            }
+            else
+            {
+                m_log.DebugFormat("[HG IM SERVICE]: Failed to deliver message to {0}", reginfo.ServerURI);
+                return false;
+            }
+
+            if (imresult)
+            {
+                // IM delivery successful, so store the Agent's location in our local cache.
+                lock (m_UserLocationMap)
+                {
+                    if (m_UserLocationMap.ContainsKey(toAgentID))
+                    {
+                        m_UserLocationMap[toAgentID] = upd;
+                    }
+                    else
+                    {
+                        m_UserLocationMap.Add(toAgentID, upd);
+                    }
+                }
+                return true;
+            }
+            else
+            {
+                // try again, but lookup user this time.
+                // Warning, this must call the Async version
+                // of this method or we'll be making thousands of threads
+                // The version within the spawned thread is SendGridInstantMessageViaXMLRPCAsync
+                // The version that spawns the thread is SendGridInstantMessageViaXMLRPC
+
+                // This is recursive!!!!!
+                return TrySendInstantMessage(im, upd, false);
+            }
+        }
+
+        bool ForwardIMToGrid(string url, GridInstantMessage im, UUID toAgentID)
+        {
+            if (InstantMessageServiceConnector.SendInstantMessage(url, im))
+            {
+                // IM delivery successful, so store the Agent's location in our local cache.
+                lock (m_UserLocationMap)
+                {
+                    if (m_UserLocationMap.ContainsKey(toAgentID))
+                    {
+                        m_UserLocationMap[toAgentID] = url;
+                    }
+                    else
+                    {
+                        m_UserLocationMap.Add(toAgentID, url);
+                    }
+                }
+
+                return true;
+            }
+            else
+            {
+                // try again, but lookup user this time.
+                // Warning, this must call the Async version
+                // of this method or we'll be making thousands of threads
+                // The version within the spawned thread is SendGridInstantMessageViaXMLRPCAsync
+                // The version that spawns the thread is SendGridInstantMessageViaXMLRPC
+
+                // This is recursive!!!!!
+                return TrySendInstantMessage(im, url, false);
+            }
+
+        }
+    }
+}
diff --git a/OpenSim/Services/HypergridService/UserAgentService.cs b/OpenSim/Services/HypergridService/UserAgentService.cs
index 445d45e..387547e 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 +65,35 @@ 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 IUserAccountService m_UserAccountService;
+        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 +101,9 @@ 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);
+                string userAccountService = serverConfig.GetString("UserAccountService", String.Empty);
 
                 m_BypassClientVerification = serverConfig.GetBoolean("BypassClientVerification", false);
 
@@ -94,6 +115,9 @@ 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_UserAccountService = ServerUtils.LoadPlugin<IUserAccountService>(userAccountService, args);
 
                 m_GridName = serverConfig.GetString("ExternalName", string.Empty);
                 if (m_GridName == string.Empty)
@@ -156,11 +180,16 @@ 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 +208,7 @@ 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 +321,194 @@ 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;
+        }
+
+        public Dictionary<string, object> GetServerURLs(UUID userID)
+        {
+            if (m_UserAccountService == null)
+            {
+                m_log.WarnFormat("[USER AGENT SERVICE]: Unable to get server URLs because user account service is missing");
+                return new Dictionary<string, object>();
+            }
+            UserAccount account = m_UserAccountService.GetUserAccount(UUID.Zero /*!!!*/, userID);
+            if (account != null)
+                return account.ServiceURLs;
+
+            return new Dictionary<string, object>();
+        }
+
+        public string LocateUser(UUID userID)
+        {
+            foreach (TravelingAgentInfo t in m_TravelingAgents.Values)
+            {
+                if (t.UserID == userID)
+                    return t.GridExternalName;
+            }
+
+            return string.Empty;
+        }
+
+        public string GetUUI(UUID userID, UUID targetUserID)
+        {
+            // Let's see if it's a local user
+            UserAccount account = m_UserAccountService.GetUserAccount(UUID.Zero, targetUserID);
+            if (account != null)
+                return targetUserID.ToString() + ";" + m_GridName + ";" + account.FirstName + " " + account.LastName ;
+
+            // Let's try the list of friends
+            FriendInfo[] friends = m_FriendsService.GetFriends(userID);
+            if (friends != null && friends.Length > 0)
+            {
+                foreach (FriendInfo f in friends)
+                    if (f.Friend.StartsWith(targetUserID.ToString()))
+                    {
+                        // Let's remove the secret 
+                        UUID id; string tmp = string.Empty, secret = string.Empty;
+                        if (Util.ParseUniversalUserIdentifier(f.Friend, out id, out tmp, out tmp, out tmp, out secret))
+                            return f.Friend.Replace(secret, "0");
+                    }
+            }
+
+            return string.Empty;
+        }
     }
 
     class TravelingAgentInfo