using System;

namespace Wayne.Lib
{
    /// <summary>
    /// Contains extension methods for firing events.
    /// </summary>
    public static class Events
    {
        /// <summary>
        /// Fires the event if it is not null.
        /// </summary>
        /// <typeparam name="TEventArgs"></typeparam>
        /// <param name="eventHandler"></param>
        /// <param name="sender"></param>
        /// <param name="eventArgs"></param>
        public static void Fire<TEventArgs>(this EventHandler<TEventArgs> eventHandler, object sender, TEventArgs eventArgs)
            where TEventArgs : EventArgs
        {
            if (eventHandler != null)
            {
                eventHandler(sender, eventArgs);
            }
        }

        /// <summary>
        /// Fires the event if it is not null.
        /// </summary>
        /// <param name="eventHandler"></param>
        /// <param name="sender"></param>
        /// <param name="eventArgs"></param>
        public static void Fire(this EventHandler eventHandler, object sender, EventArgs eventArgs)
        {
            if (eventHandler != null)
            {
                eventHandler(sender, eventArgs);
            }
        }
    }
}