Large chat and IM support

libremetaverse-core/Libremetaverse/AgentManager.cs

@@ -1561,6 +1561,8 @@ namespace OpenMetaverse
 
         #region Chat and instant messages
 
+        protected int message_chunk_group_id = 0; // a int that starts at 1 goes upto 500 (then back to 1)
+
         /// <summary>
         /// Send a text message from the Agent to the Simulator
         /// </summary>
@@ -1568,7 +1570,29 @@ namespace OpenMetaverse
         /// <param name="channel">The channel to send the message on, 0 is the public channel. Channels above 0
         /// can be used however only scripts listening on the specified channel will see the message</param>
         /// <param name="type">Denotes the type of message being sent, shout, whisper, etc.</param>
-        public void Chat(string message, int channel, ChatType type)
+        /// <param name="allow_split_message">Enables large messages to be split into chunks of 900 with [CHUNKGROUPID|CHUNKID|TOTALCHUNKS] at the start</param>
+        /// <param name="hide_chunk_grouping">Hides [CHUNKGROUPID|CHUNKID|TOTALCHUNKS] at the start of chunked messages</param>
+        public void Chat(string message, int channel, ChatType type, bool allow_split_message = true, bool hide_chunk_grouping = true)
+        {
+            if ((message.Length > 900) && (allow_split_message == true))
+            {
+                int group_id = message_chunk_group_id;
+                message_chunk_group_id++;
+                if (message_chunk_group_id > 500) message_chunk_group_id = 1;
+                string[] chunks = message.SplitBy(900).ToArray();
+                int chunkid = 1;
+                foreach (string C in chunks)
+                {
+                    string chunk_grouping = "";
+                    if (hide_chunk_grouping == false)
+                    {
+                        chunk_grouping = "[" + group_id.ToString() + "|" + chunkid.ToString() + "|" + chunks.Length.ToString() + "]";
+                    }
+                    Chat("" + chunk_grouping + "" + C + "", channel, type, false);
+                    chunkid++;
+                }
+            }
+            else if ((message.Length > 0) && (message.Length < 1000))
             {
                 ChatFromViewerPacket chat = new ChatFromViewerPacket
                 {
@@ -1584,9 +1608,9 @@ namespace OpenMetaverse
                             Type = (byte) type
                         }
                 };
-
                 Client.Network.SendPacket(chat);
             }
+        }
 
         /// <summary>
         /// Request any instant messages sent while the client was offline to be resent.
@@ -1675,6 +1699,9 @@ namespace OpenMetaverse
             byte[] binaryBucket)
         {
             if (target != UUID.Zero)
+            {
+                string[] chunks = message.SplitBy(900).ToArray();
+                foreach (string C in chunks)
                 {
                     ImprovedInstantMessagePacket im = new ImprovedInstantMessagePacket();
 
@@ -1688,7 +1715,9 @@ namespace OpenMetaverse
                     im.MessageBlock.FromAgentName = Utils.StringToBytes(fromName);
                     im.MessageBlock.FromGroup = false;
                     im.MessageBlock.ID = imSessionID;
-                im.MessageBlock.Message = Utils.StringToBytes(message);
+
+                    im.MessageBlock.Message = Utils.StringToBytes(C);
+
                     im.MessageBlock.Offline = (byte)offline;
                     im.MessageBlock.ToAgentID = target;
 
@@ -1701,6 +1730,8 @@ namespace OpenMetaverse
 
                     // Send the message
                     Client.Network.SendPacket(im);
+                    Thread.Sleep(100);
+                }
             }
             else
             {
@@ -3801,7 +3832,8 @@ namespace OpenMetaverse
                 }
             };
 
-            var postData = new OSDMap {
+            var postData = new OSDMap
+            {
                 ["hover_height"] = hoverHeight
             };
             request.BeginGetResponse(postData, OSDFormat.Xml, Client.Settings.CAPS_TIMEOUT);

libremetaverse-core/Libremetaverse/Helpers.cs

@@ -74,6 +74,21 @@ namespace OpenMetaverse
             Debug
         };
 
+
+        public static IEnumerable<string> SplitBy(this string str, int chunkLength)
+        {
+            if (String.IsNullOrEmpty(str)) throw new ArgumentException();
+            if (chunkLength < 1) throw new ArgumentException();
+
+            for (int i = 0; i < str.Length; i += chunkLength)
+            {
+                if (chunkLength + i > str.Length)
+                    chunkLength = str.Length - i;
+
+                yield return str.Substring(i, chunkLength);
+            }
+        }
+
         /// <summary>
         /// 
         /// </summary>