/*
 * 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 OpenMetaverse;
using OpenSim.Framework;
using System.Collections.Generic;

namespace OpenSim.Region.Framework.Interfaces
{
    public struct FriendInfo
    {
        public UUID PrincipalID;
        public string Friend;
        int MyRights;
        int TheirRights;
    }

    public interface IFriendsModule
    {
        /// <summary>
        /// Offer a friendship to a user from the server end rather than by direct initiation from a client.
        /// </summary>
        /// <param name="fromUserId">
        /// A user with this id must existing in the user data store, but need not be logged on.
        /// </param>
        /// <param name="toUserClient">
        /// An actually logged in client to which the offer is being made.
        /// FIXME: This is somewhat too tightly coupled - it should arguably be possible to offer friendships even if the 
        /// receiving user is not currently online. 
        /// </param>
        /// <param name="offerMessage"></param>
        void OfferFriendship(UUID fromUserId, IClientAPI toUserClient, string offerMessage);
        uint GetFriendPerms(UUID PrincipalID, UUID FriendID);
        FriendInfo[] GetFriends(UUID PrincipalID);
    }
}