1 files changed, 52 insertions, 4 deletions

diff --git a/OpenSim/Region/Framework/Scenes/Scene.Inventory.cs b/OpenSim/Region/Framework/Scenes/Scene.Inventory.cs
index dfb5846..1c30a35 100644
--- a/OpenSim/Region/Framework/Scenes/Scene.Inventory.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.Inventory.cs
@@ -907,11 +907,29 @@ namespace OpenSim.Region.Framework.Scenes
             }
         }
 
+        /// <summary>
+        /// Link an inventory item to an existing item.
+        /// </summary>
+        /// <remarks>
+        /// The linkee item id is placed in the asset id slot.  This appears to be what the viewer expects when
+        /// it receives inventory information.
+        /// </remarks>
+        /// <param name="remoteClient"></param>
+        /// <param name="transActionID"></param>
+        /// <param name="folderID"></param>
+        /// <param name="callbackID"></param>
+        /// <param name="description"></param>
+        /// <param name="name"></param>
+        /// <param name="invType"></param>
+        /// <param name="type">/param>
+        /// <param name="olditemID"></param>
         private void HandleLinkInventoryItem(IClientAPI remoteClient, UUID transActionID, UUID folderID,
                                              uint callbackID, string description, string name,
                                              sbyte invType, sbyte type, UUID olditemID)
         {
-            m_log.DebugFormat("[AGENT INVENTORY]: Received request to create inventory item link {0} in folder {1} pointing to {2}", name, folderID, olditemID);
+            m_log.DebugFormat(
+                "[AGENT INVENTORY]: Received request from {0} to create inventory item link {1} in folder {2} pointing to {3}",
+                remoteClient.Name, name, folderID, olditemID);
 
             if (!Permissions.CanCreateUserInventory(invType, remoteClient.AgentId))
                 return;
@@ -919,7 +937,20 @@ namespace OpenSim.Region.Framework.Scenes
             ScenePresence presence;
             if (TryGetScenePresence(remoteClient.AgentId, out presence))
             {
-//                byte[] data = null;
+                bool linkAlreadyExists = false;
+                List<InventoryItemBase> existingItems = InventoryService.GetFolderItems(remoteClient.AgentId, folderID);
+                foreach (InventoryItemBase item in existingItems)
+                    if (item.AssetID == olditemID)
+                        linkAlreadyExists = true;
+
+                if (linkAlreadyExists)
+                {
+                    m_log.WarnFormat(
+                        "[AGENT INVENTORY]: Ignoring request from {0} to create item link {1} in folder {2} pointing to {3} since a link already exists",
+                        remoteClient.Name, name, folderID, olditemID);
+
+                    return;
+                }
 
                 AssetBase asset = new AssetBase();
                 asset.FullID = olditemID;
@@ -1370,11 +1401,28 @@ namespace OpenSim.Region.Framework.Scenes
             InventoryFolderBase containingFolder = new InventoryFolderBase(folder.ID, client.AgentId);
             containingFolder = InventoryService.GetFolder(containingFolder);
 
-            //m_log.DebugFormat("[AGENT INVENTORY]: Sending inventory folder contents ({0} nodes) for \"{1}\" to {2} {3}",
-            //    contents.Folders.Count + contents.Items.Count, containingFolder.Name, client.FirstName, client.LastName);
+//            m_log.DebugFormat("[AGENT INVENTORY]: Sending inventory folder contents ({0} nodes) for \"{1}\" to {2} {3}",
+//                contents.Folders.Count + contents.Items.Count, containingFolder.Name, client.FirstName, client.LastName);
 
             if (containingFolder != null && containingFolder != null)
+            {
+                // If the folder requested contains links, then we need to send those folders first, otherwise the links
+                // will be broken in the viewer.
+                HashSet<UUID> linkedItemFolderIdsToSend = new HashSet<UUID>();
+                foreach (InventoryItemBase item in contents.Items)
+                {
+                    if (item.AssetType == (int)AssetType.Link)
+                    {
+                        InventoryItemBase linkedItem = InventoryService.GetItem(new InventoryItemBase(item.AssetID));
+                        linkedItemFolderIdsToSend.Add(linkedItem.Folder);
+                    }
+                }
+
+                foreach (UUID linkedItemFolderId in linkedItemFolderIdsToSend)
+                    SendInventoryUpdate(client, new InventoryFolderBase(linkedItemFolderId), false, true);
+
                 client.SendInventoryFolderDetails(client.AgentId, folder.ID, contents.Items, contents.Folders, containingFolder.Version, fetchFolders, fetchItems);
+            }
         }
 
         /// <summary>