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 *       derived from this software without specific prior written permission.
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namespace OpenSim.Framework.Communications.Limit
{
    /// <summary>
    /// Interface for strategies that can limit requests from the client.  Currently only used in the
    /// texture modules to deal with repeated requests for certain textures.  However, limiting strategies
    /// could be used with other requests.
    /// </summary>
    public interface IRequestLimitStrategy<TId>
    {
        /// <summary>
        /// Should the request be allowed?  If the id is not monitored, then the request is always allowed.
        /// Otherwise, the strategy criteria will be applied.
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        bool AllowRequest(TId id);

        /// <summary>
        /// Has the request been refused just once?
        /// </summary>
        /// <returns>False if the request has not yet been refused, or if the request has been refused more
        /// than once.</returns>
        bool IsFirstRefusal(TId id);

        /// <summary>
        /// Start monitoring for future AllowRequest calls.  If the id is already monitored, then monitoring
        /// continues.
        /// </summary>
        /// <param name="id"></param>
        void MonitorRequests(TId id);

        /// <summary>
        /// Is the id being monitored?
        /// </summary>
        /// <param name="uuid"> </param>
        /// <returns></returns>
        bool IsMonitoringRequests(TId id);
    }
}
