/*
 * 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 OpenSim 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.Reflection;
using System.Text;
using libsecondlife;
using libsecondlife.Packets;
using log4net;
using OpenSim.Framework;
using OpenSim.Framework.Communications.Cache;
using OpenSim.Region.Environment.Interfaces;

namespace OpenSim.Region.Environment.Scenes
{
    public partial class Scene
    {
        private static readonly ILog m_log
            = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

        /// <summary>
        /// Start all the scripts in the scene which should be started.
        /// </summary>
        public void StartScripts()
        {
            m_log.Info("[PRIM INVENTORY]: Starting scripts in scene");

            foreach (EntityBase group in Entities.Values)
            {
                if (group is SceneObjectGroup)
                {
                    ((SceneObjectGroup) group).StartScripts();
                }
            }
        }

        public void AddUploadedInventoryItem(LLUUID agentID, InventoryItemBase item)
        {
            IMoneyModule money=RequestModuleInterface<IMoneyModule>();
            if (money != null)
            {
                money.ApplyUploadCharge(agentID);
            }

            AddInventoryItem(agentID, item);
        }

        public bool AddInventoryItemReturned(LLUUID AgentId, InventoryItemBase item)
        {
            CachedUserInfo userInfo
                = CommsManager.UserProfileCacheService.GetUserDetails(AgentId);
            if (userInfo != null)
            {
                userInfo.AddItem(item);
                return true;
            }
            else
            {
                m_log.ErrorFormat(
                    "[AGENT INVENTORY]: Agent was not found for add of item {1} {2}", item.Name, item.ID);

                return false;
            }
        }

        public void AddInventoryItem(LLUUID AgentID, InventoryItemBase item)
        {
            CachedUserInfo userInfo
                = CommsManager.UserProfileCacheService.GetUserDetails(AgentID);

            if (userInfo != null)
            {
                userInfo.AddItem(item);

                int userlevel = 0;
                if (ExternalChecks.ExternalChecksCanBeGodLike(AgentID))
                {
                    userlevel = 1;
                }
                if (m_regInfo.MasterAvatarAssignedUUID == AgentID)
                {
                    userlevel = 2;
                }
                EventManager.TriggerOnNewInventoryItemUploadComplete(AgentID, item.AssetID, item.Name, userlevel);
            }
            else
            {
                m_log.ErrorFormat(
                    "[AGENT INVENTORY]: Agent {1} was not found for add of item {2} {3}",
                    AgentID, item.Name, item.ID);

                return;
            }
        }

        /// <summary>
        /// Add an inventory item to an avatar's inventory.
        /// </summary>
        /// <param name="remoteClient">The remote client controlling the avatar</param>
        /// <param name="item">The item.  This structure contains all the item metadata, including the folder
        /// in which the item is to be placed.</param>
        public void AddInventoryItem(IClientAPI remoteClient, InventoryItemBase item)
        {
            CachedUserInfo userInfo
                = CommsManager.UserProfileCacheService.GetUserDetails(remoteClient.AgentId);

            if (userInfo != null)
            {
                AddInventoryItem(remoteClient.AgentId, item);
                remoteClient.SendInventoryItemCreateUpdate(item);
            }
        }

        /// <summary>
        /// Capability originating call to update the asset of an item in an agent's inventory
        /// </summary>
        /// <param name="remoteClient"></param>
        /// <param name="itemID"></param>
        /// <param name="data"></param>
        /// <returns></returns>
        public LLUUID CapsUpdateInventoryItemAsset(IClientAPI remoteClient, LLUUID itemID, byte[] data)
        {
            CachedUserInfo userInfo = CommsManager.UserProfileCacheService.GetUserDetails(remoteClient.AgentId);
            if (userInfo != null)
            {
                if (userInfo.RootFolder != null)
                {
                    InventoryItemBase item = userInfo.RootFolder.FindItem(itemID);

                    if (item != null)
                    {
                        AssetBase asset =
                            CreateAsset(item.Name, item.Description, (sbyte)item.AssetType, data);
                        AssetCache.AddAsset(asset);

                        item.AssetID = asset.FullID;
                        userInfo.UpdateItem(item);

                        // remoteClient.SendInventoryItemCreateUpdate(item);
                        if ((InventoryType) item.InvType == InventoryType.Notecard)
                        {
                            //do we want to know about updated note cards?
                        }
                        else if ((InventoryType) item.InvType == InventoryType.LSL)
                        {
                            // do we want to know about updated scripts
                        }

                        return (asset.FullID);
                    }
                }
            }
            return LLUUID.Zero;
        }

        /// <summary>
        /// <see>CapsUpdatedInventoryItemAsset(IClientAPI, LLUUID, byte[])</see>
        /// </summary>
        private LLUUID CapsUpdateInventoryItemAsset(LLUUID avatarId, LLUUID itemID, byte[] data)
        {
            ScenePresence avatar;

            if (TryGetAvatar(avatarId, out avatar))
            {
                return CapsUpdateInventoryItemAsset(avatar.ControllingClient, itemID, data);
            }
            else
            {
                m_log.ErrorFormat(
                    "[AGENT INVENTORY]: " +
                    "Avatar {0} cannot be found to update its inventory item asset",
                    avatarId);
            }

            return LLUUID.Zero;
        }

        /// <summary>
        /// Capability originating call to update the asset of a script in a prim's (task's) inventory
        /// </summary>
        /// <param name="remoteClient"></param>
        /// <param name="itemID"></param>
        /// <param name="primID">The prim which contains the item to update</param>
        /// <param name="isScriptRunning">Indicates whether the script to update is currently running</param>
        /// <param name="data"></param>
        public void CapsUpdateTaskInventoryScriptAsset(IClientAPI remoteClient, LLUUID itemId,
                                                       LLUUID primId, bool isScriptRunning, byte[] data)
        {
            // Retrieve group
            SceneObjectPart part = GetSceneObjectPart(primId);
            SceneObjectGroup group = part.ParentGroup;
            if (null == group)
            {
                m_log.ErrorFormat(
                    "[PRIM INVENTORY]: " +
                    "Prim inventory update requested for item ID {0} in prim ID {1} but this prim does not exist",
                    itemId, primId);

                return;
            }

            // Retrieve item
            TaskInventoryItem item = group.GetInventoryItem(part.LocalId, itemId);
            if (null == item)
            {
                return;
            }

            AssetBase asset = CreateAsset(item.Name, item.Description, (sbyte)AssetType.LSLText, data);
            AssetCache.AddAsset(asset);

            // Update item with new asset
            item.AssetID = asset.FullID;
            group.UpdateInventoryItem(item);
            part.GetProperties(remoteClient);

            // Trigger rerunning of script (use TriggerRezScript event, see RezScript)
            if (isScriptRunning)
            {
                group.StopScript(part.LocalId, item.ItemID);
                group.StartScript(part.LocalId, item.ItemID);
            }
        }

        /// <summary>
        /// <see>CapsUpdateTaskInventoryScriptAsset(IClientAPI, LLUUID, LLUUID, bool, byte[])</see>
        /// </summary>
        private void CapsUpdateTaskInventoryScriptAsset(LLUUID avatarId, LLUUID itemId,
                                                        LLUUID primId, bool isScriptRunning, byte[] data)
        {
            ScenePresence avatar;

            if (TryGetAvatar(avatarId, out avatar))
            {
                CapsUpdateTaskInventoryScriptAsset(
                    avatar.ControllingClient, itemId, primId, isScriptRunning, data);
            }
            else
            {
                m_log.ErrorFormat(
                    "[PRIM INVENTORY]: " +
                    "Avatar {0} cannot be found to update its prim item asset",
                    avatarId);
            }
        }

        /// <summary>
        /// Update an item which is either already in the client's inventory or is within
        /// a transaction
        /// </summary>
        /// <param name="remoteClient"></param>
        /// <param name="transactionID">The transaction ID.  If this is LLUUID.Zero we will
        /// assume that we are not in a transaction</param>
        /// <param name="itemID">The ID of the updated item</param>
        /// <param name="name">The name of the updated item</param>
        /// <param name="description">The description of the updated item</param>
        /// <param name="nextOwnerMask">The permissions of the updated item</param>
/*        public void UpdateInventoryItemAsset(IClientAPI remoteClient, LLUUID transactionID,
                                             LLUUID itemID, string name, string description,
                                             uint nextOwnerMask)*/
        public void UpdateInventoryItemAsset(IClientAPI remoteClient, LLUUID transactionID,
                                             LLUUID itemID, InventoryItemBase itemUpd)
        {
            CachedUserInfo userInfo
                = CommsManager.UserProfileCacheService.GetUserDetails(remoteClient.AgentId);

            if (userInfo != null && userInfo.RootFolder != null)
            {
                InventoryItemBase item = userInfo.RootFolder.FindItem(itemID);

                if (item != null)
                {
                    if (LLUUID.Zero == transactionID)
                    {
                        item.Name = itemUpd.Name;
                        item.Description = itemUpd.Description;
                        item.NextPermissions = itemUpd.NextPermissions;
                        item.CurrentPermissions |= 8; // Slam!
                        item.EveryOnePermissions = itemUpd.EveryOnePermissions;

                        // TODO: Requires sanity checks
                        //item.GroupID = itemUpd.GroupID;
                        //item.GroupOwned = itemUpd.GroupOwned;
                        //item.CreationDate = itemUpd.CreationDate;

                        // TODO: Check if folder changed and move item
                        //item.NextPermissions = itemUpd.Folder;
                        item.InvType = itemUpd.InvType;
                        item.SalePrice = itemUpd.SalePrice;
                        item.SaleType = itemUpd.SaleType;
                        item.Flags = itemUpd.Flags;

                        userInfo.UpdateItem(item);
                    }
                    else
                    {
                        IAgentAssetTransactions agentTransactions = this.RequestModuleInterface<IAgentAssetTransactions>();
                        if (agentTransactions != null)
                        {
                            agentTransactions.HandleItemUpdateFromTransaction(
                                         remoteClient, transactionID, item);
                        }
                    }
                }
                else
                {
                    m_log.Error(
                        "[AGENTINVENTORY]: Item ID " + itemID + " not found for an inventory item update.");
                }
            }
            else
            {
                m_log.Error(
                    "[AGENT INVENTORY]: Agent ID " + remoteClient.AgentId + " not found for an inventory item update.");
            }
        }

        /// <summary>
        /// Give an inventory item from one avatar to another
        /// </summary>
        /// <param name="recipientClient"></param>
        /// <param name="senderId">ID of the sender of the item</param>
        /// <param name="itemId"></param>
        public void GiveInventoryItem(IClientAPI recipientClient, LLUUID senderId, LLUUID itemId)
        {
            // Retrieve the item from the sender
            CachedUserInfo senderUserInfo = CommsManager.UserProfileCacheService.GetUserDetails(senderId);

            if (senderUserInfo == null)
            {
                m_log.ErrorFormat(
                     "[AGENT INVENTORY]: Failed to find sending user {0} for item {1}", senderId, itemId);

                return;
            }

            if (senderUserInfo.RootFolder != null)
            {
                InventoryItemBase item = senderUserInfo.RootFolder.FindItem(itemId);

                if (item != null)
                {
                    if (!ExternalChecks.ExternalChecksBypassPermissions())
                    {
                        if ((item.CurrentPermissions & (uint)PermissionMask.Transfer) == 0)
                            return;
                    }

                    // TODO get recipient's root folder
                    CachedUserInfo recipientUserInfo
                        = CommsManager.UserProfileCacheService.GetUserDetails(recipientClient.AgentId);

                    if (recipientUserInfo != null)
                    {
                        // Insert a copy of the item into the recipient
                        InventoryItemBase itemCopy = new InventoryItemBase();
                        itemCopy.Owner = recipientClient.AgentId;
                        itemCopy.Creator = senderId;
                        itemCopy.ID = LLUUID.Random();
                        itemCopy.AssetID = item.AssetID;
                        itemCopy.Description = item.Description;
                        itemCopy.Name = item.Name;
                        itemCopy.AssetType = item.AssetType;
                        itemCopy.InvType = item.InvType;
                        itemCopy.Folder = LLUUID.Zero;
                        if (ExternalChecks.ExternalChecksPropagatePermissions())
                        {
                            if (item.InvType == 6)
                            {
                                itemCopy.BasePermissions &= ~(uint)(PermissionMask.Copy | PermissionMask.Modify | PermissionMask.Transfer);
                                itemCopy.BasePermissions |= (item.CurrentPermissions & 7) << 13;
                            }
                            else
                            {
                            Console.WriteLine("Non-Prim item ==>");
                                itemCopy.BasePermissions = item.BasePermissions & item.NextPermissions;
                            }

                            itemCopy.CurrentPermissions = itemCopy.BasePermissions;
                            if ((item.CurrentPermissions & 8) != 0) // Propagate slam bit
                            {
                                itemCopy.CurrentPermissions = item.NextPermissions;
                                itemCopy.BasePermissions=itemCopy.CurrentPermissions;
                                itemCopy.CurrentPermissions |= 8;
                            }

                            itemCopy.NextPermissions = item.NextPermissions;
                            itemCopy.EveryOnePermissions = item.EveryOnePermissions & item.NextPermissions;
                        }
                        else
                        {
                            itemCopy.CurrentPermissions = item.CurrentPermissions;
                            itemCopy.NextPermissions = item.NextPermissions;
                            itemCopy.EveryOnePermissions = item.EveryOnePermissions & item.NextPermissions;
                            itemCopy.BasePermissions = item.BasePermissions;
                        }
                        itemCopy.GroupID = item.GroupID;
                        itemCopy.GroupOwned = item.GroupOwned;
                        itemCopy.Flags = item.Flags;
                        itemCopy.SalePrice = item.SalePrice;
                        itemCopy.SaleType = item.SaleType;

                        recipientUserInfo.AddItem(itemCopy);

                        if (!ExternalChecks.ExternalChecksBypassPermissions())
                        {
                            if ((item.CurrentPermissions & (uint)PermissionMask.Copy) == 0)
                                senderUserInfo.DeleteItem(itemId);
                        }

                        // Let the recipient client know about this new item
                        recipientClient.SendBulkUpdateInventory(itemCopy);
                    }
                    else
                    {
                        m_log.ErrorFormat(
                            "[AGENT INVENTORY]: Could not find userinfo for recipient user {0}, {1} of item {2}, {3} from {4}",
                            recipientClient.Name, recipientClient.AgentId, item.Name,
                            item.ID, senderId);
                    }
                }
                else
                {
                    m_log.ErrorFormat(
                        "[AGENT INVENTORY]: Failed to find item {0} to give to {1}", itemId, senderId);

                    return;
                }
            }
            else
            {
                m_log.Error("[AGENT INVENTORY]: Failed to find item " + itemId.ToString() + ", no root folder");
                return;
            }
        }

        public void CopyInventoryItem(IClientAPI remoteClient, uint callbackID, LLUUID oldAgentID, LLUUID oldItemID,
                                      LLUUID newFolderID, string newName)
        {
            m_log.DebugFormat(
                "[AGENT INVENTORY]: CopyInventoryItem received by {0} with oldAgentID {1}, oldItemID {2}, new FolderID {3}, newName {4}",
                remoteClient.AgentId, oldAgentID, oldItemID, newFolderID, newName);

            InventoryItemBase item = CommsManager.UserProfileCacheService.libraryRoot.FindItem(oldItemID);

            if (item == null)
            {
                CachedUserInfo userInfo = CommsManager.UserProfileCacheService.GetUserDetails(oldAgentID);
                if (userInfo == null)
                {
                    m_log.Error("[AGENT INVENTORY]: Failed to find user " + oldAgentID.ToString());
                    return;
                }

                if (userInfo.RootFolder != null)
                {
                    item = userInfo.RootFolder.FindItem(oldItemID);

                    if (item == null)
                    {
                        m_log.Error("[AGENT INVENTORY]: Failed to find item " + oldItemID.ToString());
                        return;
                    }
                }
                else
                {
                    m_log.Error("[AGENT INVENTORY]: Failed to find item " + oldItemID.ToString());
                    return;
                }
            }

            AssetBase asset
                = AssetCache.GetAsset(
                    item.AssetID, (item.AssetType == (int)AssetType.Texture ? true : false));

            if (asset != null)
            {
                if (newName != String.Empty)
                {
                    asset.Name = newName;
                }

                if (remoteClient.AgentId == oldAgentID)
                {
                    CreateNewInventoryItem(
                        remoteClient, newFolderID, item.Name, item.Flags, callbackID, asset, (sbyte)item.InvType,
                        item.BasePermissions, item.CurrentPermissions, item.EveryOnePermissions, item.NextPermissions);
                }
                else
                {
                    CreateNewInventoryItem(
                        remoteClient, newFolderID, item.Name, item.Flags, callbackID, asset, (sbyte)item.InvType,
                        item.NextPermissions, item.NextPermissions, item.EveryOnePermissions & item.NextPermissions, item.NextPermissions);
                }
            }
            else
            {
                m_log.ErrorFormat(
                    "[AGENT INVENTORY]: Could not copy item {0} since asset {1} could not be found",
                    item.Name, item.AssetID);
            }
        }

        /// <summary>
        /// Create a new asset data structure.
        /// </summary>
        /// <param name="name"></param>
        /// <param name="description"></param>
        /// <param name="invType"></param>
        /// <param name="assetType"></param>
        /// <param name="data"></param>
        /// <returns></returns>
        private AssetBase CreateAsset(string name, string description, sbyte assetType, byte[] data)
        {
            AssetBase asset = new AssetBase();
            asset.Name = name;
            asset.Description = description;
            asset.Type = assetType;
            asset.FullID = LLUUID.Random();
            asset.Data = (data == null) ? new byte[1] : data;
            
            return asset;
        }

        /// <summary>
        /// Move an item within the agent's inventory.
        /// </summary>
        /// <param name="remoteClient"></param>
        /// <param name="folderID"></param>
        /// <param name="itemID"></param>
        /// <param name="length"></param>
        /// <param name="newName"></param>
        public void MoveInventoryItem(IClientAPI remoteClient, LLUUID folderID, LLUUID itemID, int length,
                                      string newName)
        {
            m_log.DebugFormat(
                "[AGENT INVENTORY]: Moving item {0} to {1} for {2}", itemID, folderID, remoteClient.AgentId);

            CachedUserInfo userInfo = CommsManager.UserProfileCacheService.GetUserDetails(remoteClient.AgentId);

            if (userInfo == null)
            {
                m_log.Error("[AGENT INVENTORY]: Failed to find user " + remoteClient.AgentId.ToString());

                return;
            }

            if (userInfo.RootFolder != null)
            {
                InventoryItemBase item = userInfo.RootFolder.FindItem(itemID);

                if (item != null)
                {
                    if (newName != String.Empty)
                    {
                        item.Name = newName;
                    }
                    item.Folder = folderID;

                    userInfo.DeleteItem(item.ID);

                    AddInventoryItem(remoteClient, item);
                }
                else
                {
                    m_log.Error("[AGENT INVENTORY]: Failed to find item " + itemID.ToString());

                    return;
                }
            }
            else
            {
                m_log.Error("[AGENT INVENTORY]: Failed to find item " + itemID.ToString() + ", no root folder");

                return;
            }
        }

        /// <summary>
        /// Create a new inventory item.
        /// </summary>
        /// <param name="remoteClient"></param>
        /// <param name="folderID"></param>
        /// <param name="callbackID"></param>
        /// <param name="asset"></param>
        /// <param name="invType"></param>
        /// <param name="nextOwnerMask"></param>
        private void CreateNewInventoryItem(IClientAPI remoteClient, LLUUID folderID, string name, uint flags, uint callbackID,
                                            AssetBase asset, sbyte invType, uint nextOwnerMask)
        {
            CreateNewInventoryItem(
                remoteClient, folderID, name, flags, callbackID, asset, invType,
                (uint)PermissionMask.All, (uint)PermissionMask.All, 0, nextOwnerMask);
        }

        /// <summary>
        /// Create a new inventory item.
        /// </summary>
        /// <param name="remoteClient"></param>
        /// <param name="folderID"></param>
        /// <param name="callbackID"></param>
        /// <param name="asset"></param>
        /// <param name="invType"></param>
        /// <param name="nextOwnerMask"></param>
        private void CreateNewInventoryItem(
            IClientAPI remoteClient, LLUUID folderID, string name, uint flags, uint callbackID, AssetBase asset, sbyte invType,
            uint baseMask, uint currentMask, uint everyoneMask, uint nextOwnerMask)
        {
            CachedUserInfo userInfo
                = CommsManager.UserProfileCacheService.GetUserDetails(remoteClient.AgentId);

            if (userInfo != null)
            {
                InventoryItemBase item = new InventoryItemBase();
                item.Owner = remoteClient.AgentId;
                item.Creator = remoteClient.AgentId;
                item.ID = LLUUID.Random();
                item.AssetID = asset.FullID;
                item.Description = asset.Description;
                item.Name = name;
                item.Flags = flags;
                item.AssetType = asset.Type;
                item.InvType = invType;
                item.Folder = folderID;
                item.CurrentPermissions = currentMask;
                item.NextPermissions = nextOwnerMask;
                item.EveryOnePermissions = everyoneMask;
                item.BasePermissions = baseMask;

                userInfo.AddItem(item);
                remoteClient.SendInventoryItemCreateUpdate(item);
            }
            else
            {
                m_log.WarnFormat(
                    "No user details associated with client {0} uuid {1} in CreateNewInventoryItem!",
                     remoteClient.Name, remoteClient.AgentId);
            }
        }

        /// <summary>
        /// Create a new inventory item.  Called when the client creates a new item directly within their
        /// inventory (e.g. by selecting a context inventory menu option).
        /// </summary>
        /// <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="wearableType"></param>
        /// <param name="nextOwnerMask"></param>
        public void CreateNewInventoryItem(IClientAPI remoteClient, LLUUID transactionID, LLUUID folderID,
                                           uint callbackID, string description, string name, sbyte invType,
                                           sbyte assetType,
                                           byte wearableType, uint nextOwnerMask)
        {
//            m_log.DebugFormat("[AGENT INVENTORY]: Received request to create inventory item {0} in folder {1}", name, folderID);

            if (transactionID == LLUUID.Zero)
            {
                CachedUserInfo userInfo
                    = CommsManager.UserProfileCacheService.GetUserDetails(remoteClient.AgentId);

                if (userInfo != null)
                {
                    ScenePresence presence;
                    TryGetAvatar(remoteClient.AgentId, out presence);
                    byte[] data = null;
                    if (invType == 3 && presence != null) // libsecondlife.asset.assettype.landmark = 3 - needs to be turned into an enum
                    {
                        LLVector3 pos=presence.AbsolutePosition;
                        string strdata=String.Format("Landmark version 2\nregion_id {0}\nlocal_pos {1} {2} {3}\nregion_handle {4}\n",
                            presence.Scene.RegionInfo.RegionID,
                            pos.X, pos.Y, pos.Z,
                            presence.RegionHandle);
                        data=Encoding.ASCII.GetBytes(strdata);
                    }

                    AssetBase asset = CreateAsset(name, description, assetType, data);
                    AssetCache.AddAsset(asset);

                    CreateNewInventoryItem(remoteClient, folderID, asset.Name, 0, callbackID, asset, invType, nextOwnerMask);
                }
                else
                {
                    m_log.ErrorFormat(
                        "userInfo for agent uuid {0} unexpectedly null in CreateNewInventoryItem",
                        remoteClient.AgentId);
                }
            }
            else
            {
                IAgentAssetTransactions agentTransactions = this.RequestModuleInterface<IAgentAssetTransactions>();
                if (agentTransactions != null)
                {
                    agentTransactions.HandleItemCreationFromTransaction(
                    remoteClient, transactionID, folderID, callbackID, description,
                    name, invType, assetType, wearableType, nextOwnerMask);
                }


            }
        }

        /// <summary>
        /// Remove an inventory item for the client's inventory
        /// </summary>
        /// <param name="remoteClient"></param>
        /// <param name="itemID"></param>
        private void RemoveInventoryItem(IClientAPI remoteClient, LLUUID itemID)
        {
            CachedUserInfo userInfo
                = CommsManager.UserProfileCacheService.GetUserDetails(remoteClient.AgentId);

            if (userInfo == null)
            {
                m_log.WarnFormat(
                    "[AGENT INVENTORY]: Failed to find user {0} {1} to delete inventory item {2}",
                    remoteClient.Name, remoteClient.AgentId, itemID);

                return;
            }

            userInfo.DeleteItem(itemID);
        }

        /// <summary>
        /// Removes an inventory folder.  Although there is a packet in the Linden protocol for this, it may be
        /// legacy and not currently used (purge folder is used to remove folders from trash instead).
        /// </summary>
        /// <param name="remoteClient"></param>
        /// <param name="folderID"></param>
        private void RemoveInventoryFolder(IClientAPI remoteClient, LLUUID folderID)
        {
            CachedUserInfo userInfo
                = CommsManager.UserProfileCacheService.GetUserDetails(remoteClient.AgentId);

            if (userInfo == null)
            {
                m_log.Warn("[AGENT INVENTORY]: Failed to find user " + remoteClient.AgentId.ToString());
                return;
            }

            if (userInfo.RootFolder != null)
            {
                InventoryItemBase folder = userInfo.RootFolder.FindItem(folderID);

                if (folder != null)
                {
                    m_log.WarnFormat(
                         "[AGENT INVENTORY]: Remove folder not implemented in request by {0} {1} for {2}",
                         remoteClient.Name, remoteClient.AgentId, folderID);

                    // doesn't work just yet, commented out. will fix in next patch.
                    // userInfo.DeleteItem(folder);
                }
            }
        }

        private SceneObjectGroup GetGroupByPrim(uint localID)
        {
            List<EntityBase> EntityList = GetEntities();

            foreach (EntityBase ent in EntityList)
            {
                if (ent is SceneObjectGroup)
                {
                    if (((SceneObjectGroup) ent).HasChildPrim(localID))
                        return (SceneObjectGroup) ent;
                }
            }
            return null;
        }

        /// <summary>
        /// Send the details of a prim's inventory to the client.
        /// </summary>
        /// <param name="remoteClient"></param>
        /// <param name="primLocalID"></param>
        public void RequestTaskInventory(IClientAPI remoteClient, uint primLocalID)
        {
            SceneObjectGroup group = GetGroupByPrim(primLocalID);
            if (group != null)
            {
                bool fileChange = group.GetPartInventoryFileName(remoteClient, primLocalID);
                if (fileChange)
                {
                    if (XferManager != null)
                    {
                        group.RequestInventoryFile(remoteClient, primLocalID, XferManager);
                    }
                }
            }
            else
            {
                m_log.ErrorFormat(
                    "[PRIM INVENTORY]: Inventory requested of prim {0} which doesn't exist", primLocalID);
            }
        }

        /// <summary>
        /// Remove an item from a prim (task) inventory
        /// </summary>
        /// <param name="remoteClient">Unused at the moment but retained since the avatar ID might
        /// be necessary for a permissions check at some stage.</param>
        /// <param name="itemID"></param>
        /// <param name="localID"></param>
        public void RemoveTaskInventory(IClientAPI remoteClient, LLUUID itemID, uint localID)
        {
            SceneObjectPart part = GetSceneObjectPart(localID);
            SceneObjectGroup group = part.ParentGroup;
            if (group != null)
            {
                int type = group.RemoveInventoryItem(localID, itemID);
                part.GetProperties(remoteClient);
                if (type == 10)
                {
                    EventManager.TriggerRemoveScript(localID, itemID);
                }
            }
            else
            {
                m_log.ErrorFormat(
                    "[PRIM INVENTORY]: " +
                    "Removal of item {0} requested of prim {1} but this prim does not exist",
                    itemID,
                    localID);
            }
        }

        private InventoryItemBase CreateAgentInventoryItemFromTask(LLUUID destAgent, SceneObjectPart part, LLUUID itemId)
        {
            TaskInventoryItem taskItem = part.GetInventoryItem(itemId);

            if (null == taskItem)
            {
                // Console already notified of error in GetInventoryItem
                return null;
            }

            InventoryItemBase agentItem = new InventoryItemBase();

            agentItem.ID = LLUUID.Random();
            agentItem.Creator = taskItem.CreatorID;
            agentItem.Owner = destAgent;
            agentItem.AssetID = taskItem.AssetID;
            agentItem.Description = taskItem.Description;
            agentItem.Name = taskItem.Name;
            agentItem.AssetType = taskItem.Type;
            agentItem.InvType = taskItem.InvType;
            agentItem.Flags = taskItem.Flags;

            if ((destAgent != taskItem.OwnerID) && ExternalChecks.ExternalChecksPropagatePermissions())
            {
                agentItem.BasePermissions = taskItem.NextOwnerMask;
                agentItem.CurrentPermissions = taskItem.NextOwnerMask;
                agentItem.NextPermissions = taskItem.NextOwnerMask;
                agentItem.EveryOnePermissions = taskItem.EveryoneMask & taskItem.NextOwnerMask;
            }
            else
            {
                agentItem.BasePermissions = taskItem.BaseMask;
                agentItem.CurrentPermissions = taskItem.OwnerMask;
                agentItem.NextPermissions = taskItem.NextOwnerMask;
                agentItem.EveryOnePermissions = taskItem.EveryoneMask;
            }

            if (!ExternalChecks.ExternalChecksBypassPermissions())
            {
                if ((taskItem.OwnerMask & (uint)PermissionMask.Copy) == 0)
                    part.RemoveInventoryItem(itemId);
            }

            return agentItem;
        }

        /// <summary>
        /// Move the given item in the given prim to a folder in the client's inventory
        /// </summary>
        /// <param name="remoteClient"></param>
        /// <param name="folderID"></param>
        /// <param name="part"></param>
        /// <param name="itemID"></param>
        public void MoveTaskInventoryItem(IClientAPI remoteClient, LLUUID folderId, SceneObjectPart part, LLUUID itemId)
        {

            InventoryItemBase agentItem = CreateAgentInventoryItemFromTask(remoteClient.AgentId, part, itemId);

            agentItem.Folder = folderId;
            AddInventoryItem(remoteClient, agentItem);
        }
        
        /// <summary>
        /// <see>ClientMoveTaskInventoryItem</see>
        /// </summary>
        /// <param name="remoteClient"></param>
        /// <param name="folderID"></param>
        /// <param name="primLocalID"></param>
        /// <param name="itemID"></param>
        public void ClientMoveTaskInventoryItem(IClientAPI remoteClient, LLUUID folderId, uint primLocalId, LLUUID itemId)
        {
            SceneObjectPart part = GetSceneObjectPart(primLocalId);

            if (null == part)
            {
                m_log.WarnFormat(
                    "[PRIM INVENTORY]: " +
                    "Move of inventory item {0} from prim with local id {1} failed because the prim could not be found",
                    itemId, primLocalId);

                return;
            }

            TaskInventoryItem taskItem = part.GetInventoryItem(itemId);

            // Only owner can copy
            if (remoteClient.AgentId != taskItem.OwnerID)
            {
                return;
            }

            MoveTaskInventoryItem(remoteClient, folderId, part, itemId);
        }
        
        /// <summary>
        /// <see>MoveTaskInventoryItem</see>
        /// </summary>
        /// <param name="remoteClient"></param>
        /// <param name="folderID"></param>
        /// <param name="part"></param>
        /// <param name="itemID"></param>
        public void MoveTaskInventoryItem(LLUUID avatarId, LLUUID folderId, SceneObjectPart part, LLUUID itemId)
        {
            ScenePresence avatar;

            if (TryGetAvatar(avatarId, out avatar))
            {
                MoveTaskInventoryItem(avatar.ControllingClient, folderId, part, itemId);
            }
            else
            {
                CachedUserInfo profile = CommsManager.UserProfileCacheService.GetUserDetails(avatarId);
                if(profile == null || profile.RootFolder == null)
                {
                    m_log.ErrorFormat(
                        "[PRIM INVENTORY]: " +
                        "Avatar {0} cannot be found to add item",
                        avatarId);
                }
                InventoryItemBase agentItem = CreateAgentInventoryItemFromTask(avatarId, part, itemId);
                agentItem.Folder = folderId;

                AddInventoryItem(avatarId, agentItem);
            }
        }
        
        /// <summary>
        /// Copy a task (prim) inventory item to another task (prim)
        /// </summary>
        /// <param name="destId"></param>
        /// <param name="part"></param>
        /// <param name="itemId"></param>
        public void MoveTaskInventoryItem(LLUUID destId, SceneObjectPart part, LLUUID itemId)
        {
            TaskInventoryItem srcTaskItem = part.GetInventoryItem(itemId);

            if (srcTaskItem == null)
            {
                // error was already logged
                return;
            }
            
            SceneObjectPart destPart = GetSceneObjectPart(destId);

            if (destPart == null)
            {
                m_log.ErrorFormat(
                        "[PRIM INVENTORY]: " +
                        "Could not find prim for ID {0}",
                        destId);
                return;
            }
            
            // todo: also check llAllowInventoryDrop when implemented
            if(part.OwnerID != destPart.OwnerID)
            {
                // object cannot copy items to an object owned by a different owner
                // unless llAllowInventoryDrop has been called

                return;
            }

            // must have both move and modify permission to put an item in an object
            if((part.OwnerMask & ((uint)PermissionMask.Move | (uint)PermissionMask.Modify)) == 0 )
            {
                return;
            }

            TaskInventoryItem destTaskItem = new TaskInventoryItem();
            
            destTaskItem.ItemID = LLUUID.Random();
            destTaskItem.CreatorID = srcTaskItem.CreatorID;
            destTaskItem.AssetID = srcTaskItem.AssetID;
            destTaskItem.GroupID = destPart.GroupID;
            destTaskItem.OwnerID = destPart.OwnerID;
            destTaskItem.ParentID = destPart.UUID;
            destTaskItem.ParentPartID = destPart.UUID;

            destTaskItem.BaseMask = srcTaskItem.BaseMask;
            destTaskItem.EveryoneMask = srcTaskItem.EveryoneMask;
            destTaskItem.GroupMask = srcTaskItem.GroupMask;
            destTaskItem.OwnerMask = srcTaskItem.OwnerMask;
            destTaskItem.NextOwnerMask = srcTaskItem.NextOwnerMask;
            destTaskItem.Flags = srcTaskItem.Flags;
            
            if (destPart.OwnerID != part.OwnerID)
            {
                if (ExternalChecks.ExternalChecksPropagatePermissions())
                {
                    destTaskItem.OwnerMask = srcTaskItem.OwnerMask &
                            srcTaskItem.NextOwnerMask;
                    destTaskItem.GroupMask = srcTaskItem.GroupMask &
                            srcTaskItem.NextOwnerMask;
                    destTaskItem.EveryoneMask = srcTaskItem.EveryoneMask &
                            srcTaskItem.NextOwnerMask;
                    destTaskItem.BaseMask = srcTaskItem.BaseMask &
                            srcTaskItem.NextOwnerMask;
                    destTaskItem.OwnerMask |= 8; // Slam!
                }
            }

            destTaskItem.Description = srcTaskItem.Description;
            destTaskItem.Name = srcTaskItem.Name;
            destTaskItem.InvType = srcTaskItem.InvType;
            destTaskItem.Type = srcTaskItem.Type;
            
            destPart.AddInventoryItem(destTaskItem);

            if ((srcTaskItem.OwnerMask & (uint)PermissionMask.Copy) == 0)
                part.RemoveInventoryItem(itemId);

            ScenePresence avatar;
            
            if(TryGetAvatar(srcTaskItem.OwnerID, out avatar))
            {
                destPart.GetProperties(avatar.ControllingClient);
            }
        }
        
        public void MoveTaskInventoryItems(LLUUID destID, string category, SceneObjectPart host, List<LLUUID> items)
        {
            CachedUserInfo profile = CommsManager.UserProfileCacheService.GetUserDetails(destID);
            if(profile == null || profile.RootFolder == null)
            {
                m_log.ErrorFormat(
                    "[PRIM INVENTORY]: " +
                    "Avatar {0} cannot be found to add items",
                    destID);
                return;
            }

            LLUUID newFolderID = LLUUID.Random();
            
            profile.CreateFolder(category, newFolderID, 0xffff, profile.RootFolder.ID);

            foreach (LLUUID itemID in items)
            {
                InventoryItemBase agentItem = CreateAgentInventoryItemFromTask(destID, host, itemID);
                agentItem.Folder = newFolderID;

                AddInventoryItem(destID, agentItem);
            }

            ScenePresence avatar;

            if (TryGetAvatar(destID, out avatar))
            {
                profile.SendInventoryDecendents(avatar.ControllingClient,
                        profile.RootFolder.ID, true, false);
                profile.SendInventoryDecendents(avatar.ControllingClient,
                        newFolderID, false, true);
            }
        }

        /// <summary>
        /// Update an item in a prim (task) inventory.
        /// This method does not handle scripts, <see>RezScript(IClientAPI, LLUUID, unit)</see>
        /// </summary>
        /// <param name="remoteClient"></param>
        /// <param name="transactionID"></param>
        /// <param name="itemInfo"></param>
        /// <param name="primLocalID"></param>
        public void UpdateTaskInventory(IClientAPI remoteClient, LLUUID transactionID, TaskInventoryItem itemInfo,
                                        uint primLocalID)
        {
            LLUUID itemID = itemInfo.ItemID;

            // Find the prim we're dealing with
            SceneObjectPart part = GetSceneObjectPart(primLocalID);

            if (part != null)
            {
                TaskInventoryItem currentItem=part.GetInventoryItem(itemID);
                if (currentItem == null)
                {
                    LLUUID copyID = LLUUID.Random();
                    if (itemID != LLUUID.Zero)
                    {
                        CachedUserInfo userInfo = CommsManager.UserProfileCacheService.GetUserDetails(remoteClient.AgentId);

                        if (userInfo != null && userInfo.RootFolder != null)
                        {
                            InventoryItemBase item = userInfo.RootFolder.FindItem(itemID);

                            // Try library
                            // XXX clumsy, possibly should be one call
                            if (null == item)
                            {
                                item = CommsManager.UserProfileCacheService.libraryRoot.FindItem(itemID);
                            }

                            if (item != null)
                            {
                                part.ParentGroup.AddInventoryItem(remoteClient, primLocalID, item, copyID);
                                m_log.InfoFormat(
                                    "[PRIM INVENTORY]: Update with item {0} requested of prim {1} for {2}",
                                    item.Name, primLocalID, remoteClient.Name);
                                part.GetProperties(remoteClient);
                                if (!ExternalChecks.ExternalChecksBypassPermissions())
                                {
                                    if ((item.CurrentPermissions & (uint)PermissionMask.Copy) == 0)
                                        RemoveInventoryItem(remoteClient, itemID);
                                }
                            }
                            else
                            {
                                m_log.ErrorFormat(
                                    "[PRIM INVENTORY]: Could not find inventory item {0} to update for {1}!",
                                    itemID, remoteClient.Name);
                            }
                        }
                    }
                }
                else // Updating existing item with new perms etc
                {
                    TaskInventoryItem prevItem=part.GetInventoryItem(itemID);
                    itemInfo.AssetID = prevItem.AssetID;
                    if (part.UpdateInventoryItem(itemInfo))
                        part.GetProperties(remoteClient);
                }
            }
            else
            {
                m_log.WarnFormat(
                    "[PRIM INVENTORY]: " +
                    "Update with item {0} requested of prim {1} for {2} but this prim does not exist",
                    itemID, primLocalID, remoteClient.Name);
            }
        }

        /// <summary>
        /// Rez a script into a prim's inventory
        /// </summary>
        /// <param name="remoteClient"></param>
        /// <param name="itemID"> </param>
        /// <param name="localID"></param>
        public void RezScript(IClientAPI remoteClient, InventoryItemBase itemBase, LLUUID transactionID, uint localID)
        {
            LLUUID itemID=itemBase.ID;
            LLUUID copyID = LLUUID.Random();

            if (itemID != LLUUID.Zero)
            {
                CachedUserInfo userInfo = CommsManager.UserProfileCacheService.GetUserDetails(remoteClient.AgentId);

                if (userInfo != null && userInfo.RootFolder != null)
                {
                    InventoryItemBase item = userInfo.RootFolder.FindItem(itemID);

                    // Try library
                    // XXX clumsy, possibly should be one call
                    if (null == item)
                    {
                        item = CommsManager.UserProfileCacheService.libraryRoot.FindItem(itemID);
                    }

                    if (item != null)
                    {
                        SceneObjectPart part = GetSceneObjectPart(localID);
                        if (part != null)
                        {
                            if (ExternalChecks.ExternalChecksCanRunScript(item.ID, part.UUID, remoteClient.AgentId))
                            {
                                part.ParentGroup.AddInventoryItem(remoteClient, localID, item, copyID);
                                part.ParentGroup.StartScript(localID, copyID);
                                part.GetProperties(remoteClient);

                                //                        m_log.InfoFormat("[PRIMINVENTORY]: " +
                                //                                         "Rezzed script {0} into prim local ID {1} for user {2}",
                                //                                         item.inventoryName, localID, remoteClient.Name);
                            }
                        }
                        else
                        {
                            m_log.ErrorFormat(
                                "[PRIM INVENTORY]: " +
                                "Could not rez script {0} into prim local ID {1} for user {2}"
                                + " because the prim could not be found in the region!",
                                item.Name, localID, remoteClient.Name);
                        }
                    }
                    else
                    {
                        m_log.ErrorFormat(
                            "[PRIM INVENTORY]: Could not find script inventory item {0} to rez for {1}!",
                            itemID, remoteClient.Name);
                    }
                }
            }
            else  // If the itemID is zero then the script has been rezzed directly in an object's inventory
            {
                SceneObjectPart part=GetSceneObjectPart(itemBase.Folder);
                if (part == null)
                    return;

                AssetBase asset = CreateAsset(itemBase.Name, itemBase.Description, (sbyte)itemBase.AssetType, Encoding.ASCII.GetBytes("default\n{\n    state_entry()\n    {\n        llSay(0, \"Script running\");\n    }\n}"));
                AssetCache.AddAsset(asset);

                TaskInventoryItem taskItem=new TaskInventoryItem();

                taskItem.ResetIDs(itemBase.Folder);
                taskItem.ParentID = itemBase.Folder;
                taskItem.CreationDate = (uint)itemBase.CreationDate;
                taskItem.Name = itemBase.Name;
                taskItem.Description = itemBase.Description;
                taskItem.Type = itemBase.AssetType;
                taskItem.InvType = itemBase.InvType;
                taskItem.OwnerID = itemBase.Owner;
                taskItem.CreatorID = itemBase.Creator;
                taskItem.BaseMask = itemBase.BasePermissions;
                taskItem.OwnerMask = itemBase.CurrentPermissions;
                taskItem.EveryoneMask = itemBase.EveryOnePermissions;
                taskItem.NextOwnerMask = itemBase.NextPermissions;
                taskItem.GroupID = itemBase.GroupID;
                taskItem.GroupMask = 0;
                taskItem.Flags = itemBase.Flags;
                taskItem.PermsGranter = LLUUID.Zero;
                taskItem.PermsMask = 0;
                taskItem.AssetID = asset.ID;

                part.AddInventoryItem(taskItem);
                part.GetProperties(remoteClient);
                
                if (ExternalChecks.ExternalChecksCanRunScript(taskItem.AssetID, part.UUID, remoteClient.AgentId))
                {
                    part.StartScript(taskItem);
                }
            }
        }


        /// <summary>
        /// Called when an object is removed from the environment into inventory.
        /// </summary>
        /// <param name="packet"></param>
        /// <param name="simClient"></param>
        public virtual void DeRezObject(Packet packet, IClientAPI remoteClient)
        {
            DeRezObjectPacket DeRezPacket = (DeRezObjectPacket) packet;

            LLUUID folderID = LLUUID.Zero;

            foreach (DeRezObjectPacket.ObjectDataBlock Data in DeRezPacket.ObjectData)
            {
//                    m_log.DebugFormat(
//                        "[AGENT INVENTORY]: Received request to derez {0} into folder {1}",
//                        Data.ObjectLocalID, DeRezPacket.AgentBlock.DestinationID);

                EntityBase selectedEnt = null;
                //m_log.Info("[CLIENT]: LocalID:" + Data.ObjectLocalID.ToString());

                List<EntityBase> EntityList = GetEntities();

                foreach (EntityBase ent in EntityList)
                {
                    if (ent.LocalId == Data.ObjectLocalID)
                    {
                        selectedEnt = ent;
                        break;
                    }
                }
                if (selectedEnt != null)
                {
                    bool permissionToTake = false;
                    bool permissionToDelete = false;
                    if (DeRezPacket.AgentBlock.Destination == 1)// Take Copy
                    {
                        permissionToTake = ExternalChecks.ExternalChecksCanTakeCopyObject(((SceneObjectGroup)selectedEnt).UUID, remoteClient.AgentId);
                        permissionToDelete = false; //Just taking copy!

                    }
                    else if (DeRezPacket.AgentBlock.Destination == 4) //Take
                    {
                        // Take
                        permissionToTake = ExternalChecks.ExternalChecksCanTakeObject(((SceneObjectGroup)selectedEnt).UUID, remoteClient.AgentId);
                        permissionToDelete = permissionToTake; //If they can take, they can delete!
                    }

                    else if (DeRezPacket.AgentBlock.Destination == 6) //Delete
                    {
                        permissionToTake = ExternalChecks.ExternalChecksCanDeleteObject(((SceneObjectGroup)selectedEnt).UUID, remoteClient.AgentId);
                        permissionToDelete = ExternalChecks.ExternalChecksCanDeleteObject(((SceneObjectGroup)selectedEnt).UUID, remoteClient.AgentId);
                    }
                    else if (DeRezPacket.AgentBlock.Destination == 9) //Return
                    {
                        permissionToTake = ExternalChecks.ExternalChecksCanDeleteObject(((SceneObjectGroup)selectedEnt).UUID, remoteClient.AgentId);
                        permissionToDelete = ExternalChecks.ExternalChecksCanDeleteObject(((SceneObjectGroup)selectedEnt).UUID, remoteClient.AgentId);
                    }

                    SceneObjectGroup objectGroup = (SceneObjectGroup)selectedEnt;

                    if (permissionToTake)
                    {
                        string sceneObjectXml = objectGroup.ToXmlString();

                        CachedUserInfo userInfo =
                            CommsManager.UserProfileCacheService.GetUserDetails(remoteClient.AgentId);
                        if (userInfo != null)
                        {
//                            string searchFolder = "";

//                            if (DeRezPacket.AgentBlock.Destination == 6)
//                                searchFolder = "Trash";
//                            else if (DeRezPacket.AgentBlock.Destination == 9)
//                                searchFolder = "Lost And Found";

                            // If we're deleting someone else's item, it goes back to their deleted items folder
                            // If we're returning someone's item, it goes back to the owner's Lost And Found folder.

                            if (DeRezPacket.AgentBlock.DestinationID == LLUUID.Zero || (DeRezPacket.AgentBlock.Destination == 6 && objectGroup.OwnerID != remoteClient.AgentId))
                            {
                                List<InventoryFolderBase> subrootfolders = userInfo.RootFolder.RequestListOfFolders();
                                foreach (InventoryFolderBase flder in subrootfolders)
                                {
                                    if (flder.Name == "Lost And Found")
                                    {
                                        folderID = flder.ID;
                                        break;
                                    }
                                }

                                if (folderID == LLUUID.Zero)
                                {
                                    folderID = userInfo.RootFolder.ID;
                                }
                                //currently following code not used (or don't know of any case of destination being zero
                            }
                            else
                            {
                                folderID = DeRezPacket.AgentBlock.DestinationID;
                            }

                            AssetBase asset = CreateAsset(
                                ((SceneObjectGroup) selectedEnt).GetPartName(selectedEnt.LocalId),
                                ((SceneObjectGroup) selectedEnt).GetPartDescription(selectedEnt.LocalId),
                                (sbyte)AssetType.Object,
                                Helpers.StringToField(sceneObjectXml));
                            AssetCache.AddAsset(asset);

                            InventoryItemBase item = new InventoryItemBase();
                            item.Creator = objectGroup.RootPart.CreatorID;

                            if (DeRezPacket.AgentBlock.Destination == 1 || DeRezPacket.AgentBlock.Destination == 4)// Take / Copy
                                item.Owner = remoteClient.AgentId;
                            else // Delete / Return
                                item.Owner = objectGroup.OwnerID;

                            item.ID = LLUUID.Random();
                            item.AssetID = asset.FullID;
                            item.Description = asset.Description;
                            item.Name = asset.Name;
                            item.AssetType = asset.Type;
                            item.InvType = (int)InventoryType.Object;
                            item.Folder = folderID;
                            if ((remoteClient.AgentId != objectGroup.RootPart.OwnerID) && ExternalChecks.ExternalChecksPropagatePermissions())
                            {
                                uint perms=objectGroup.GetEffectivePermissions();
                                uint nextPerms=(perms & 7) << 13;
                                if ((nextPerms & (uint)PermissionMask.Copy) == 0)
                                    perms &= ~(uint)PermissionMask.Copy;
                                if ((nextPerms & (uint)PermissionMask.Transfer) == 0)
                                    perms &= ~(uint)PermissionMask.Transfer;
                                if ((nextPerms & (uint)PermissionMask.Modify) == 0)
                                    perms &= ~(uint)PermissionMask.Modify;

                                item.BasePermissions = perms & objectGroup.RootPart.NextOwnerMask;
                                item.CurrentPermissions = item.BasePermissions;
                                item.NextPermissions = objectGroup.RootPart.NextOwnerMask;
                                item.EveryOnePermissions = objectGroup.RootPart.EveryoneMask & objectGroup.RootPart.NextOwnerMask;
                                item.CurrentPermissions |= 8; // Slam!
                            }
                            else
                            {
                                item.BasePermissions = objectGroup.GetEffectivePermissions();
                                item.CurrentPermissions = objectGroup.GetEffectivePermissions();
                                item.NextPermissions = objectGroup.RootPart.NextOwnerMask;
                                item.EveryOnePermissions = objectGroup.RootPart.EveryoneMask;
                            }

                            // TODO: add the new fields (Flags, Sale info, etc)

                            userInfo.AddItem(item);
                            if (item.Owner == remoteClient.AgentId)
                            {
                                remoteClient.SendInventoryItemCreateUpdate(item);
                            }
                            else
                            {
                                ScenePresence notifyUser = GetScenePresence(item.Owner);
                                if (notifyUser != null)
                                {
                                    notifyUser.ControllingClient.SendInventoryItemCreateUpdate(item);
                                }
                            }
                        }
                    }

                    if (permissionToDelete)
                    {
                        DeleteSceneObject(objectGroup);
                    }
                }
            }
        }

        public void updateKnownAsset(IClientAPI remoteClient, SceneObjectGroup grp, LLUUID assetID, LLUUID agentID)
        {
            SceneObjectGroup objectGroup = grp;
            if (objectGroup != null)
            {
                string sceneObjectXml = objectGroup.ToXmlString();

                CachedUserInfo userInfo =
                    CommsManager.UserProfileCacheService.GetUserDetails(agentID);
                if (userInfo != null)
                {
                    Queue<InventoryFolderImpl> searchfolders = new Queue<InventoryFolderImpl>();
                    searchfolders.Enqueue(userInfo.RootFolder);

                    LLUUID foundFolder = userInfo.RootFolder.ID;

                    // search through folders to find the asset.
                    while (searchfolders.Count > 0)
                    {
                        InventoryFolderImpl fld = searchfolders.Dequeue();
                        lock (fld)
                        {
                            if (fld != null)
                            {
                                if (fld.Items.ContainsKey(assetID))
                                {
                                    foundFolder = fld.ID;
                                    searchfolders.Clear();
                                    break;
                                }
                                else
                                {
                                    foreach (InventoryFolderImpl subfld in fld.SubFolders.Values)
                                    {
                                        searchfolders.Enqueue(subfld);
                                    }
                                }
                            }
                        }
                    }
                    
                    AssetBase asset = CreateAsset(
                        objectGroup.GetPartName(objectGroup.LocalId),
                        objectGroup.GetPartDescription(objectGroup.LocalId),
                        (sbyte)AssetType.Object,
                        Helpers.StringToField(sceneObjectXml));
                    AssetCache.AddAsset(asset);

                    InventoryItemBase item = new InventoryItemBase();
                    item.Creator = objectGroup.RootPart.CreatorID;
                    item.Owner = agentID;
                    item.ID = assetID;
                    item.AssetID = asset.FullID;
                    item.Description = asset.Description;
                    item.Name = asset.Name;
                    item.AssetType = asset.Type;
                    item.InvType = (int)InventoryType.Object;

                    // Sticking it in root folder for now..    objects folder later?

                    item.Folder = foundFolder;// DeRezPacket.AgentBlock.DestinationID;
                    if ((agentID != objectGroup.RootPart.OwnerID) && ExternalChecks.ExternalChecksPropagatePermissions())
                    {
                        item.BasePermissions = objectGroup.RootPart.NextOwnerMask;
                        item.CurrentPermissions = objectGroup.RootPart.NextOwnerMask;
                        item.NextPermissions = objectGroup.RootPart.NextOwnerMask;
                        item.EveryOnePermissions = objectGroup.RootPart.EveryoneMask & objectGroup.RootPart.NextOwnerMask;
                    }
                    else
                    {
                        item.BasePermissions = objectGroup.GetEffectivePermissions();
                        item.CurrentPermissions = objectGroup.GetEffectivePermissions();
                        item.NextPermissions = objectGroup.RootPart.NextOwnerMask;
                        item.EveryOnePermissions = objectGroup.RootPart.EveryoneMask;
                    }

                    userInfo.AddItem(item);

                    // this gets called when the agent loggs off!
                    if (remoteClient != null)
                    {
                        remoteClient.SendInventoryItemCreateUpdate(item);
                    }

                }
            }
        }
        public LLUUID attachObjectAssetStore(IClientAPI remoteClient, SceneObjectGroup grp, LLUUID AgentId)
        {
            SceneObjectGroup objectGroup = grp;
            if (objectGroup != null)
            {
                string sceneObjectXml = objectGroup.ToXmlString();

                CachedUserInfo userInfo =
                    CommsManager.UserProfileCacheService.GetUserDetails(AgentId);
                if (userInfo != null)
                {
                    AssetBase asset = CreateAsset(
                        objectGroup.GetPartName(objectGroup.LocalId),
                        objectGroup.GetPartDescription(objectGroup.LocalId),
                        (sbyte)AssetType.Object,
                        Helpers.StringToField(sceneObjectXml));
                    AssetCache.AddAsset(asset);

                    InventoryItemBase item = new InventoryItemBase();
                    item.Creator = objectGroup.RootPart.CreatorID;
                    item.Owner = remoteClient.AgentId;
                    item.ID = LLUUID.Random();
                    item.AssetID = asset.FullID;
                    item.Description = asset.Description;
                    item.Name = asset.Name;
                    item.AssetType = asset.Type;
                    item.InvType = (int)InventoryType.Object;

                    // Sticking it in root folder for now..    objects folder later?

                    item.Folder = userInfo.RootFolder.ID;// DeRezPacket.AgentBlock.DestinationID;
                    if ((remoteClient.AgentId != objectGroup.RootPart.OwnerID) && ExternalChecks.ExternalChecksPropagatePermissions())
                    {
                        item.BasePermissions = objectGroup.RootPart.NextOwnerMask;
                        item.CurrentPermissions = objectGroup.RootPart.NextOwnerMask;
                        item.NextPermissions = objectGroup.RootPart.NextOwnerMask;
                        item.EveryOnePermissions = objectGroup.RootPart.EveryoneMask & objectGroup.RootPart.NextOwnerMask;
                    }
                    else
                    {
                        item.BasePermissions = objectGroup.RootPart.BaseMask;
                        item.CurrentPermissions = objectGroup.RootPart.OwnerMask;
                        item.NextPermissions = objectGroup.RootPart.NextOwnerMask;
                        item.EveryOnePermissions = objectGroup.RootPart.EveryoneMask;
                    }

                    userInfo.AddItem(item);
                    remoteClient.SendInventoryItemCreateUpdate(item);
                    return item.AssetID;
                }
                return LLUUID.Zero;
            }
            return LLUUID.Zero;

        }

        /// <summary>
        /// Event Handler Rez an object into a scene
        /// Calls the non-void event handler
        /// </summary>
        /// <param name="remoteClient"></param>
        /// <param name="itemID"></param>
        /// <param name="RayEnd"></param>
        /// <param name="RayStart"></param>
        /// <param name="RayTargetID"></param>
        /// <param name="BypassRayCast"></param>
        /// <param name="RayEndIsIntersection"></param>
        /// <param name="EveryoneMask"></param>
        /// <param name="GroupMask"></param>
        /// <param name="NextOwnerMask"></param>
        /// <param name="ItemFlags"></param>
        /// <param name="RezSelected"></param>
        /// <param name="RemoveItem"></param>
        /// <param name="fromTaskID"></param>
        public virtual void RezObject(IClientAPI remoteClient, LLUUID itemID, LLVector3 RayEnd, LLVector3 RayStart,
                                    LLUUID RayTargetID, byte BypassRayCast, bool RayEndIsIntersection,
                                    uint EveryoneMask, uint GroupMask, uint NextOwnerMask, uint ItemFlags,
                                    bool RezSelected, bool RemoveItem, LLUUID fromTaskID)
        {
            RezObject(
                remoteClient, itemID, RayEnd, RayStart, RayTargetID, BypassRayCast, RayEndIsIntersection,
                EveryoneMask, GroupMask, NextOwnerMask, ItemFlags, RezSelected, RemoveItem, fromTaskID, false);
        }

       /// <summary>
       /// Returns SceneObjectGroup or null from asset request.
       /// </summary>
       /// <param name="remoteClient"></param>
       /// <param name="itemID"></param>
       /// <param name="RayEnd"></param>
       /// <param name="RayStart"></param>
       /// <param name="RayTargetID"></param>
       /// <param name="BypassRayCast"></param>
       /// <param name="RayEndIsIntersection"></param>
       /// <param name="EveryoneMask"></param>
       /// <param name="GroupMask"></param>
       /// <param name="NextOwnerMask"></param>
       /// <param name="ItemFlags"></param>
       /// <param name="RezSelected"></param>
       /// <param name="RemoveItem"></param>
       /// <param name="fromTaskID"></param>
       /// <param name="difference"></param>
       /// <returns></returns>
        public virtual SceneObjectGroup RezObject(IClientAPI remoteClient, LLUUID itemID, LLVector3 RayEnd, LLVector3 RayStart,
                                    LLUUID RayTargetID, byte BypassRayCast, bool RayEndIsIntersection,
                                    uint EveryoneMask, uint GroupMask, uint NextOwnerMask, uint ItemFlags,
                                    bool RezSelected, bool RemoveItem, LLUUID fromTaskID, bool attachment)
        {
            // Work out position details
            byte bRayEndIsIntersection = (byte)0;

            if (RayEndIsIntersection)
            {
                bRayEndIsIntersection = (byte)1;
            }
            else
            {
                bRayEndIsIntersection = (byte)0;
            }

            LLVector3 scale = new LLVector3(0.5f, 0.5f, 0.5f);


            LLVector3 pos = GetNewRezLocation(
                      RayStart, RayEnd, RayTargetID, new LLQuaternion(0, 0, 0, 1),
                      BypassRayCast, bRayEndIsIntersection,true,scale, false);

            // Rez object
            CachedUserInfo userInfo = CommsManager.UserProfileCacheService.GetUserDetails(remoteClient.AgentId);
            if (userInfo != null)
            {
                if (userInfo.RootFolder != null)
                {
                    InventoryItemBase item = userInfo.RootFolder.FindItem(itemID);

                    if (item != null)
                    {
                        AssetBase rezAsset = AssetCache.GetAsset(item.AssetID, false);

                        if (rezAsset != null)
                        {
                            string xmlData = Helpers.FieldToUTF8String(rezAsset.Data);
                            SceneObjectGroup group = new SceneObjectGroup(this, m_regionHandle, xmlData);
                            if (!ExternalChecks.ExternalChecksCanRezObject(group.Children.Count, remoteClient.AgentId, pos) && !attachment)
                            {
                                return null;
                            }

                            group.ResetIDs();

                            AddSceneObject(group, true);

                            // if attachment we set it's asset id so object updates can reflect that
                            // if not, we set it's position in world.
                            if (!attachment)
                            {
                                pos = GetNewRezLocation(
                                    RayStart, RayEnd, RayTargetID, new LLQuaternion(0, 0, 0, 1),
                                    BypassRayCast, bRayEndIsIntersection, true, group.GroupScale(), false);
                                group.AbsolutePosition = pos;
                            }
                            else
                            {
                                group.SetFromAssetID(itemID);
                            }

                            SceneObjectPart rootPart = null;
                            try
                            {
                                rootPart = group.GetChildPart(group.UUID);
                            }
                            catch (NullReferenceException)
                            {
                                string isAttachment = "";

                                if (attachment)
                                    isAttachment = " Object was an attachment";

                                m_log.Error("[OJECTREZ]: Error rezzing ItemID: " + itemID + " object has no rootpart." + isAttachment);
                            }

                            // Since renaming the item in the inventory does not affect the name stored
                            // in the serialization, transfer the correct name from the inventory to the
                            // object itself before we rez.
                            rootPart.Name = item.Name;
                            rootPart.Description = item.Description;

                            List<SceneObjectPart> partList = new List<SceneObjectPart>(group.Children.Values);

                            if (rootPart.OwnerID != item.Owner)
                            {
                                if ((item.CurrentPermissions & 8) != 0)
                                {
                                    foreach (SceneObjectPart part in partList)
                                    {
                                        part.EveryoneMask = item.EveryOnePermissions;
                                        part.NextOwnerMask = item.NextPermissions;
                                    }
                                }
                                group.ApplyNextOwnerPermissions();
                            }

                            foreach (SceneObjectPart part in partList)
                            {
                                if (part.OwnerID != item.Owner)
                                {
                                    part.LastOwnerID = part.OwnerID;
                                    part.OwnerID = item.Owner;
                                    part.ChangeInventoryOwner(item.Owner);
                                }
                                else if (((item.CurrentPermissions & 8) != 0) && (!attachment)) // Slam!
                                {
                                    part.EveryoneMask = item.EveryOnePermissions;
                                    part.NextOwnerMask = item.NextPermissions;
                                }
                            }

                            rootPart.TrimPermissions();

                            if (!attachment)
                            {
                                if (group.RootPart.Shape.PCode == (byte)PCode.Prim)
                                {
                                    group.ClearPartAttachmentData();
                                }
                                // Ghost prim if this is enabled!
                                //group.ApplyPhysics(m_physicalPrim);
                            }

                            group.StartScripts();

                            if (!attachment)
                                rootPart.ScheduleFullUpdate();

                            return rootPart.ParentGroup;
                        }
                    }
                }
            }

            return null;
        }

        /// <summary>
        /// Rez an object in the scene
        /// </summary>
        /// <param name="item"></param>
        /// <param name="pos"></param>
        /// <param name="rot"></param>
        /// <param name="vel"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public virtual SceneObjectGroup RezObject(TaskInventoryItem item, LLVector3 pos, LLQuaternion rot, LLVector3 vel, int param)
        {
            // Rez object
            if (item != null)
            {
                LLUUID ownerID = item.OwnerID;

                AssetBase rezAsset = AssetCache.GetAsset(item.AssetID, false);

                if (rezAsset != null)
                {
                    string xmlData = Helpers.FieldToUTF8String(rezAsset.Data);
                    SceneObjectGroup group = new SceneObjectGroup(this, m_regionHandle, xmlData);

                    if (!ExternalChecks.ExternalChecksCanRezObject(group.Children.Count, ownerID, pos))
                    {
                        return null;
                    }
                    group.ResetIDs();

                    AddSceneObject(group, true);

                    // Set the startup parameter for on_rez event and llGetStartParameter() function
                    group.StartParameter = param;

                    // we set it's position in world.
                    group.AbsolutePosition = pos;

                    SceneObjectPart rootPart = group.GetChildPart(group.UUID);

                    // Since renaming the item in the inventory does not affect the name stored
                    // in the serialization, transfer the correct name from the inventory to the
                    // object itself before we rez.
                    rootPart.Name = item.Name;
                    rootPart.Description = item.Description;

                    List<SceneObjectPart> partList = new List<SceneObjectPart>(group.Children.Values);

                    if (rootPart.OwnerID != item.OwnerID)
                    {
                        if ((item.OwnerMask & 8) != 0)
                        {
                            foreach (SceneObjectPart part in partList)
                            {
                                part.EveryoneMask = item.EveryoneMask;
                                part.NextOwnerMask = item.NextOwnerMask;
                            }
                        }
                        group.ApplyNextOwnerPermissions();
                    }

                    foreach (SceneObjectPart part in partList)
                    {
                        if (part.OwnerID != item.OwnerID)
                        {
                            part.LastOwnerID = part.OwnerID;
                            part.OwnerID = item.OwnerID;
                            part.ChangeInventoryOwner(item.OwnerID);
                        }
                        else if ((item.OwnerMask & 8) != 0) // Slam!
                        {
                            part.EveryoneMask = item.EveryoneMask;
                            part.NextOwnerMask = item.NextOwnerMask;
                        }
                    }
                    rootPart.TrimPermissions();
                    if (group.RootPart.Shape.PCode == (byte)PCode.Prim)
                    {
                        group.ClearPartAttachmentData();
                    }
                    group.UpdateGroupRotation(rot);
                    group.ApplyPhysics(m_physicalPrim);
                    group.Velocity = vel;
                    group.StartScripts(param);
                    rootPart.ScheduleFullUpdate();
                    return rootPart.ParentGroup;
                }
            }
            
            return null;
        }
        
        public virtual bool returnObjects(SceneObjectGroup[] returnobjects, LLUUID AgentId)
        {
            string message = "";
            if (returnobjects.Length <= 0)
                return false;

            // for the moment we're going to store them individually..   however, in the future, the rezObject
            // will be able to have more items.

            //string returnstring = "";
            //returnstring += "<scene>\n";
            //for (int i = 0; i < returnobjects.Length; i++)
            //{
            //    returnstring += grp.ToXmlString2();
            //}
            //returnstring += "</scene>\n";

            bool permissionToDelete = false;

            for (int i = 0; i < returnobjects.Length; i++)
            {
                CachedUserInfo userInfo =
                    CommsManager.UserProfileCacheService.GetUserDetails(returnobjects[i].OwnerID);
                if (userInfo == null)
                {
                    CommsManager.UserProfileCacheService.AddNewUser(returnobjects[i].OwnerID);

                }
                if (userInfo != null)
                {
                    if (userInfo.HasInventory)
                    {
                        LLUUID folderID = LLUUID.Zero;

                        List<InventoryFolderBase> subrootfolders = userInfo.RootFolder.RequestListOfFolders();
                        foreach (InventoryFolderBase flder in subrootfolders)
                        {
                            if (flder.Name == "Lost And Found")
                            {
                                folderID = flder.ID;
                                break;
                            }
                        }

                        if (folderID == LLUUID.Zero)
                        {
                            folderID = userInfo.RootFolder.ID;
                        }
                        permissionToDelete = ExternalChecks.ExternalChecksCanDeleteObject(returnobjects[i].UUID, AgentId);

                        // If the user doesn't have permission, go on to the next one.
                        if (!permissionToDelete)
                            continue;

                        string sceneObjectXml = returnobjects[i].ToXmlString2();
                        AssetBase asset = CreateAsset(
                            returnobjects[i].GetPartName(returnobjects[i].LocalId),
                            returnobjects[i].GetPartDescription(returnobjects[i].LocalId),
                            (sbyte)AssetType.Object,
                            Helpers.StringToField(sceneObjectXml));
                        AssetCache.AddAsset(asset);

                        InventoryItemBase item = new InventoryItemBase();
                        item.Creator = returnobjects[i].RootPart.CreatorID;
                        item.Owner = returnobjects[i].OwnerID;
                        item.ID = LLUUID.Random();
                        item.AssetID = asset.FullID;
                        item.Description = asset.Description;
                        item.Name = asset.Name;
                        item.AssetType = asset.Type;
                        item.InvType = (int)InventoryType.Object;
                        item.Folder = folderID;
                        
                        if ((AgentId != returnobjects[i].RootPart.OwnerID) && ExternalChecks.ExternalChecksPropagatePermissions())
                        {
                            uint perms = returnobjects[i].GetEffectivePermissions();
                            uint nextPerms = (perms & 7) << 13;
                            if ((nextPerms & (uint)PermissionMask.Copy) == 0)
                                perms &= ~(uint)PermissionMask.Copy;
                            if ((nextPerms & (uint)PermissionMask.Transfer) == 0)
                                perms &= ~(uint)PermissionMask.Transfer;
                            if ((nextPerms & (uint)PermissionMask.Modify) == 0)
                                perms &= ~(uint)PermissionMask.Modify;

                            item.BasePermissions = perms & returnobjects[i].RootPart.NextOwnerMask;
                            item.CurrentPermissions = item.BasePermissions;
                            item.NextPermissions = returnobjects[i].RootPart.NextOwnerMask;
                            item.EveryOnePermissions = returnobjects[i].RootPart.EveryoneMask & returnobjects[i].RootPart.NextOwnerMask;
                            item.CurrentPermissions |= 8; // Slam!
                        }
                        else
                        {
                            item.BasePermissions = returnobjects[i].GetEffectivePermissions();
                            item.CurrentPermissions = returnobjects[i].GetEffectivePermissions();
                            item.NextPermissions = returnobjects[i].RootPart.NextOwnerMask;
                            item.EveryOnePermissions = returnobjects[i].RootPart.EveryoneMask;
                        }

                        // TODO: add the new fields (Flags, Sale info, etc)

                        userInfo.AddItem(item);

                        ScenePresence notifyUser = GetScenePresence(item.Owner);
                        if (notifyUser != null)
                        {
                            notifyUser.ControllingClient.SendInventoryItemCreateUpdate(item);
                        }

                        SceneObjectGroup ObjectDeleting = returnobjects[i];

                        returnobjects[i] = null;

                        DeleteSceneObject(ObjectDeleting);
                        ObjectDeleting = null;
                    }
                    else
                    {
                        CommsManager.UserProfileCacheService.RequestInventoryForUser(returnobjects[i].OwnerID);
                        message = "Still waiting on the inventory service, some of the items won't be returned until the inventory services completes it's task.  Try again shortly.";
                    }
                }
                else
                {
                    message = "Still waiting on the inventory service, some of the items won't be returned until the inventory services completes it's task.  Try again shortly.";
                }
                //return true;
            }

            if (message.Length != 0)
            {
                ScenePresence returningavatar = GetScenePresence(AgentId);
                if (returningavatar != null)
                {
                    returningavatar.ControllingClient.SendAlertMessage(message);
                }
                return false;
            }
            return true;

        }

    }
}