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diff --git a/OpenSim/Services/Interfaces/IAvatarService.cs b/OpenSim/Services/Interfaces/IAvatarService.cs
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+/*
+ * 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 OpenSimulator 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;
+using System.Collections.Generic;
+
+using OpenSim.Framework;
+
+using OpenMetaverse;
+
+namespace OpenSim.Services.Interfaces
+{
+    public interface IAvatarService
+    {
+        /// <summary>
+        /// Called by the login service
+        /// </summary>
+        /// <param name="userID"></param>
+        /// <returns></returns>
+        AvatarData GetAvatar(UUID userID);
+
+        /// <summary>
+        /// Called by everyone who can change the avatar data (so, regions)
+        /// </summary>
+        /// <param name="userID"></param>
+        /// <param name="avatar"></param>
+        /// <returns></returns>
+        bool SetAvatar(UUID userID, AvatarData avatar);
+
+        /// <summary>
+        /// Not sure if it's needed
+        /// </summary>
+        /// <param name="userID"></param>
+        /// <returns></returns>
+        bool ResetAvatar(UUID userID);
+
+        /// <summary>
+        /// These methods raison d'etre: 
+        /// No need to send the entire avatar data (SetAvatar) for changing attachments
+        /// </summary>
+        /// <param name="userID"></param>
+        /// <param name="attach"></param>
+        /// <returns></returns>
+        bool SetItems(UUID userID, string[] names, string[] values);
+        bool RemoveItems(UUID userID, string[] names);
+    }
+
+    /// <summary>
+    /// Each region/client that uses avatars will have a data structure
+    /// of this type representing the avatars.
+    /// </summary>
+    public class AvatarData
+    {
+        // This pretty much determines which name/value pairs will be
+        // present below. The name/value pair describe a part of
+        // the avatar. For SL avatars, these would be "shape", "texture1",
+        // etc. For other avatars, they might be "mesh", "skin", etc.
+        // The value portion is a URL that is expected to resolve to an
+        // asset of the type required by the handler for that field.
+        // It is required that regions can access these URLs. Allowing
+        // direct access by a viewer is not required, and, if provided,
+        // may be read-only. A "naked" UUID can be used to refer to an
+        // asset int he current region's asset service, which is not
+        // portable, but allows legacy appearance to continue to
+        // function. Closed, LL-based  grids will never need URLs here.
+
+        public int AvatarType;
+        public Dictionary<string,string> Data;
+
+        public AvatarData()
+        {
+        }
+
+        public AvatarData(Dictionary<string, object> kvp)
+        {
+            Data = new Dictionary<string, string>();
+
+            if (kvp.ContainsKey("AvatarType"))
+                Int32.TryParse(kvp["AvatarType"].ToString(), out AvatarType);
+
+            foreach (KeyValuePair<string, object> _kvp in kvp)
+            {
+                if (_kvp.Value != null)
+                    Data[_kvp.Key] = _kvp.Value.ToString();
+            }
+        }
+
+        /// <summary>
+        /// </summary>
+        /// <returns></returns>
+        public Dictionary<string, object> ToKeyValuePairs()
+        {
+            Dictionary<string, object> result = new Dictionary<string, object>();
+
+            result["AvatarType"] = AvatarType.ToString();
+            foreach (KeyValuePair<string, string> _kvp in Data)
+            {
+                if (_kvp.Value != null)
+                    result[_kvp.Key] = _kvp.Value;
+            }
+            return null;
+        }
+
+        public AvatarData(AvatarAppearance appearance)
+        {
+            AvatarType = 1; // SL avatars
+            Data = new Dictionary<string, string>();
+
+            // Wearables
+            Data["AvatarHeight"] = appearance.AvatarHeight.ToString();
+            Data["BodyItem"] = appearance.BodyItem.ToString();
+            Data["EyesItem"] = appearance.EyesItem.ToString();
+            Data["GlovesItem"] = appearance.GlovesItem.ToString();
+            Data["HairItem"] = appearance.HairItem.ToString();
+            //Data["HipOffset"] = appearance.HipOffset.ToString();
+            Data["JacketItem"] = appearance.JacketItem.ToString();
+            Data["Owner"] = appearance.Owner.ToString();
+            Data["PantsItem"] = appearance.PantsItem.ToString();
+            Data["Serial"] = appearance.Serial.ToString();
+            Data["ShirtItem"] = appearance.ShirtItem.ToString();
+            Data["ShoesItem"] = appearance.ShoesItem.ToString();
+            Data["SkinItem"] = appearance.SkinItem.ToString();
+            Data["SkirtItem"] = appearance.SkirtItem.ToString();
+            Data["SocksItem"] = appearance.SocksItem.ToString();
+            Data["UnderPantsItem"] = appearance.UnderPantsItem.ToString();
+            Data["UnderShirtItem"] = appearance.UnderShirtItem.ToString();
+
+            // Attachments
+            Hashtable attachs = appearance.GetAttachments();
+            foreach (KeyValuePair<int, Hashtable> kvp in attachs)
+            {
+                Data["_ap_" + kvp.Key] = kvp.Value["item"].ToString();
+            }
+        }
+
+        public AvatarAppearance ToAvatarAppearance()
+        {
+            AvatarAppearance appearance = new AvatarAppearance();
+            // Wearables
+            appearance.AvatarHeight = float.Parse(Data["AvatarHeight"]);
+            appearance.BodyItem = UUID.Parse(Data["BodyItem"]);
+            appearance.EyesItem = UUID.Parse(Data["EyesItem"]);
+            appearance.GlovesItem = UUID.Parse(Data["GlovesItem"]);
+            appearance.HairItem = UUID.Parse(Data["HairItem"]);
+            //appearance.HipOffset = float.Parse(Data["HipOffset"]);
+            appearance.JacketItem = UUID.Parse(Data["JacketItem"]);
+            appearance.Owner = UUID.Parse(Data["Owner"]);
+            appearance.PantsItem = UUID.Parse(Data["PantsItem"]);
+            appearance.Serial = Int32.Parse(Data["Serial"]);
+            appearance.ShirtItem = UUID.Parse(Data["ShirtItem"]);
+            appearance.ShoesItem = UUID.Parse(Data["ShoesItem"]);
+            appearance.SkinItem = UUID.Parse(Data["SkinItem"]);
+            appearance.SkirtItem = UUID.Parse(Data["SkirtItem"]);
+            appearance.SocksItem = UUID.Parse(Data["SocksItem"]);
+            appearance.UnderPantsItem = UUID.Parse(Data["UnderPantsItem"]);
+            appearance.UnderShirtItem = UUID.Parse(Data["UnderShirtItem"]);
+
+            // Attachments
+            Dictionary<string, string> attchs = new Dictionary<string, string>();
+            foreach (KeyValuePair<string, string> _kvp in Data)
+                if (_kvp.Key.StartsWith("_ap_"))
+                    attchs[_kvp.Key] = _kvp.Value;
+            Hashtable aaAttachs = new Hashtable();
+            foreach (KeyValuePair<string, string> _kvp in attchs)
+            {
+                string pointStr = _kvp.Key.Substring(4);
+                int point = 0;
+                if (!Int32.TryParse(pointStr, out point))
+                    continue;
+                Hashtable tmp = new Hashtable();
+                tmp["item"] = _kvp.Value;
+                tmp["asset"] = UUID.Zero.ToString();
+                aaAttachs[point] = tmp;
+            }
+
+            return appearance;
+        }
+    }
+}