Artemis/src/Artemis.Core/Stores/LogStore.cs

using System;
using System.Collections.Generic;
using System.Linq;
using Serilog.Events;

namespace Artemis.Core
{
    /// <summary>
    ///     A static store containing the last 500 logging events
    /// </summary>
    public static class LogStore
    {
        private static readonly LinkedList<LogEvent> LinkedList = new();

        /// <summary>
        ///     Gets a list containing the last 500 log events.
        /// </summary>
        public static List<LogEvent> Events => LinkedList.ToList();

        /// <summary>
        ///     Occurs when a new <see cref="LogEvent" /> was received.
        /// </summary>
        public static event EventHandler<LogEventEventArgs>? EventAdded;

        internal static void Emit(LogEvent logEvent)
        {
            LinkedList.AddLast(logEvent);
            while (LinkedList.Count > 500)
                LinkedList.RemoveFirst();

            OnEventAdded(new LogEventEventArgs(logEvent));
        }

        private static void OnEventAdded(LogEventEventArgs e)
        {
            EventAdded?.Invoke(null, e);
        }
    }

    /// <summary>
    ///     Contains log event related data
    /// </summary>
    public class LogEventEventArgs : EventArgs
    {
        internal LogEventEventArgs(LogEvent logEvent)
        {
            LogEvent = logEvent;
        }

        /// <summary>
        ///     Gets the log event
        /// </summary>
        public LogEvent LogEvent { get; }
    }
}