// Npgsql.NpgsqlNotificationEventArgs.cs
//
// Author:
//  Wojtek Wierzbicki
//
//    Copyright (C) 2002 The Npgsql Development Team
//    npgsql-general@gborg.postgresql.org
//    http://gborg.postgresql.org/project/npgsql/projdisplay.php
//
//
// Permission to use, copy, modify, and distribute this software and its
// documentation for any purpose, without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph and the following two paragraphs appear in all copies.
//
// IN NO EVENT SHALL THE NPGSQL DEVELOPMENT TEAM BE LIABLE TO ANY PARTY
// FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
// INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
// DOCUMENTATION, EVEN IF THE NPGSQL DEVELOPMENT TEAM HAS BEEN ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
//
// THE NPGSQL DEVELOPMENT TEAM SPECIFICALLY DISCLAIMS ANY WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
// ON AN "AS IS" BASIS, AND THE NPGSQL DEVELOPMENT TEAM HAS NO OBLIGATIONS
// TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

using System;
using System.IO;

namespace Npgsql
{
    /// <summary>
    /// EventArgs class to send Notification parameters.
    /// </summary>
    public class NpgsqlNotificationEventArgs : EventArgs
    {
        /// <summary>
        /// Process ID of the PostgreSQL backend that sent this notification.
        /// </summary>
        public readonly int PID;

        /// <summary>
        /// Condition that triggered that notification.
        /// </summary>
        public readonly string Condition;

        /// <summary>
        /// Additional Information From Notifiying Process (for future use, currently postgres always sets this to an empty string)
        /// </summary>
        public readonly string AdditionalInformation;

        internal NpgsqlNotificationEventArgs(Stream stream, bool readAdditional)
        {
            PID = PGUtil.ReadInt32(stream);
            Condition = PGUtil.ReadString(stream);
            AdditionalInformation = readAdditional ? PGUtil.ReadString(stream) : string.Empty;
        }
    }
}
