Simian:

* First pass at persistence support
* Fixed a chat crashing bug
* Remove avatars from the scene on logout
* Sanity check before adding objects to the scene in ObjectAdd
* Sanity check in CompleteAgentMovementHandler if the avatar is already in the scene
* Added ContainsKey() to DoubleDictionary

git-svn-id: http://libopenmetaverse.googlecode.com/svn/trunk@2245 52acb1d6-8a22-11de-b505-999d5b087335

Programs/Simian/Extensions/XMLPersistence.cs

@@ -0,0 +1,87 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Xml;
+using OpenMetaverse;
+using OpenMetaverse.StructuredData;
+
+namespace Simian.Extensions
+{
+    public class XMLPersistence : ISimianExtension, IPersistenceProvider
+    {
+        Simian server;
+
+        public XMLPersistence(Simian server)
+        {
+            this.server = server;
+        }
+
+        public void Start()
+        {
+            LLSD llsd;
+
+            try
+            {
+                XmlTextReader reader = new XmlTextReader(File.OpenRead(server.DataDir + "simiandata.xml"));
+                llsd = LLSDParser.DeserializeXml(reader);
+                reader.Close();
+            }
+            catch (FileNotFoundException)
+            {
+                return;
+            }
+            catch (Exception ex)
+            {
+                Logger.Log("Failed to load saved data: " + ex.Message, Helpers.LogLevel.Error);
+                return;
+            }
+
+            if (llsd is LLSDMap)
+            {
+                LLSDMap dictionary = (LLSDMap)llsd;
+
+                for (int i = 0; i < server.PersistentExtensions.Count; i++)
+                {
+                    IPersistable persistable = server.PersistentExtensions[i];
+
+                    LLSD savedData;
+                    if (dictionary.TryGetValue(persistable.ToString(), out savedData))
+                    {
+                        Logger.DebugLog("Loading saved data for " + persistable.ToString());
+                        persistable.Deserialize(savedData);
+                    }
+                    else
+                    {
+                        Logger.DebugLog("No saved data found for " + persistable.ToString());
+                    }
+                }
+            }
+        }
+
+        public void Stop()
+        {
+            LLSDMap dictionary = new LLSDMap(server.PersistentExtensions.Count);
+
+            for (int i = 0; i < server.PersistentExtensions.Count; i++)
+            {
+                IPersistable persistable = server.PersistentExtensions[i];
+
+                Logger.DebugLog("Storing persistant data for " + persistable.ToString());
+                dictionary.Add(persistable.ToString(), persistable.Serialize());
+            }
+
+            try
+            {
+                XmlTextWriter writer = new XmlTextWriter(server.DataDir + "simiandata.xml", System.Text.Encoding.UTF8);
+                writer.WriteStartElement("llsd");
+                LLSDParser.SerializeXmlElement(writer, dictionary);
+                writer.WriteEndElement();
+                writer.Close();
+            }
+            catch (Exception ex)
+            {
+                Logger.Log("Failed to save persistance data: " + ex.Message, Helpers.LogLevel.Error);
+            }
+        }
+    }
+}