From 32c4e1a850fc271808f2e80c79c628ddc82e0206 Mon Sep 17 00:00:00 2001
From: Melanie <melanie@t-data.com>
Date: Thu, 14 Feb 2013 08:40:15 +0100
Subject: [PATCH] Add an event and some logic to allow customizing Simulator
 Features by avatar

---
 .../Linden/Caps/SimulatorFeaturesModule.cs    | 25 ++++++++++++++++---
 .../Interfaces/ISimulatorFeaturesModule.cs    |  6 ++++-
 2 files changed, 26 insertions(+), 5 deletions(-)

diff --git a/OpenSim/Region/ClientStack/Linden/Caps/SimulatorFeaturesModule.cs b/OpenSim/Region/ClientStack/Linden/Caps/SimulatorFeaturesModule.cs
index 8f38737005..6ef8815026 100644
--- a/OpenSim/Region/ClientStack/Linden/Caps/SimulatorFeaturesModule.cs
+++ b/OpenSim/Region/ClientStack/Linden/Caps/SimulatorFeaturesModule.cs
@@ -59,6 +59,8 @@ namespace OpenSim.Region.ClientStack.Linden
 //        private static readonly ILog m_log =
 //            LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
 
+        public event SimulatorFeaturesRequestDelegate OnSimulatorFeaturesRequest;
+
         private Scene m_scene;
 
         /// <summary>
@@ -158,7 +160,7 @@ namespace OpenSim.Region.ClientStack.Linden
             IRequestHandler reqHandler
                 = new RestHTTPHandler(
                     "GET", "/CAPS/" + UUID.Random(),
-                    HandleSimulatorFeaturesRequest, "SimulatorFeatures", agentID.ToString());
+                    x => { return HandleSimulatorFeaturesRequest(x, agentID); }, "SimulatorFeatures", agentID.ToString());
 
             caps.RegisterHandler("SimulatorFeatures", reqHandler);
         }
@@ -187,18 +189,33 @@ namespace OpenSim.Region.ClientStack.Linden
                 return new OSDMap(m_features);
         }
 
-        private Hashtable HandleSimulatorFeaturesRequest(Hashtable mDhttpMethod)
+        private OSDMap DeepCopy()
+        {
+            // This isn't the cheapest way of doing this but the rate
+            // of occurrence is low (on sim entry only) and it's a sure
+            // way to get a true deep copy.
+            OSD copy = OSDParser.DeserializeLLSDXml(OSDParser.SerializeLLSDXmlString(m_features));
+
+            return (OSDMap)copy;
+        }
+
+        private Hashtable HandleSimulatorFeaturesRequest(Hashtable mDhttpMethod, UUID agentID)
         {
 //            m_log.DebugFormat("[SIMULATOR FEATURES MODULE]: SimulatorFeatures request");
 
+            OSDMap copy = DeepCopy();
+
+            SimulatorFeaturesRequestDelegate handlerOnSimulatorFeaturesRequest = OnSimulatorFeaturesRequest;
+            if (handlerOnSimulatorFeaturesRequest != null)
+                handlerOnSimulatorFeaturesRequest(agentID, ref copy);
+
             //Send back data
             Hashtable responsedata = new Hashtable();
             responsedata["int_response_code"] = 200; 
             responsedata["content_type"] = "text/plain";
             responsedata["keepalive"] = false;
 
-            lock (m_features)
-                responsedata["str_response_string"] = OSDParser.SerializeLLSDXmlString(m_features);
+            responsedata["str_response_string"] = OSDParser.SerializeLLSDXmlString(copy);
 
             return responsedata;
         }
diff --git a/OpenSim/Region/Framework/Interfaces/ISimulatorFeaturesModule.cs b/OpenSim/Region/Framework/Interfaces/ISimulatorFeaturesModule.cs
index 8cef14e932..6effcc1d5c 100644
--- a/OpenSim/Region/Framework/Interfaces/ISimulatorFeaturesModule.cs
+++ b/OpenSim/Region/Framework/Interfaces/ISimulatorFeaturesModule.cs
@@ -26,18 +26,22 @@
  */
 
 using System;
+using OpenMetaverse;
 using OpenMetaverse.StructuredData;
 
 namespace OpenSim.Region.Framework.Interfaces
 {
+    public delegate void SimulatorFeaturesRequestDelegate(UUID agentID, ref OSDMap features);
+
     /// <summary>
     /// Add remove or retrieve Simulator Features that will be given to a viewer via the SimulatorFeatures capability.
     /// </summary>
     public interface ISimulatorFeaturesModule
     {
+        event SimulatorFeaturesRequestDelegate OnSimulatorFeaturesRequest;
         void AddFeature(string name, OSD value);
         bool RemoveFeature(string name);
         bool TryGetFeature(string name, out OSD value);
         OSDMap GetFeatures();
     }
-}
\ No newline at end of file
+}