FFXIVLauncher-Netmaui

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using System;
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using Serilog.Core;
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using Serilog.Events;
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namespace XIVLauncher.Common.Support
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{
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    /// <summary>
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    /// Serilog event sink.
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    /// </summary>
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    public class SerilogEventSink : ILogEventSink
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    {
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        private static SerilogEventSink instance;
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        private readonly IFormatProvider formatProvider;
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        /// <summary>
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        /// Initializes a new instance of the <see cref="SerilogEventSink"/> class.
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        /// </summary>
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        /// <param name="formatProvider">Logging format provider.</param>
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        private SerilogEventSink(IFormatProvider formatProvider)
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        {
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            this.formatProvider = formatProvider;
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        }
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        /// <summary>
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        /// Event on a log line being emitted.
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        /// </summary>
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        public event EventHandler<(string Line, LogEventLevel Level, DateTimeOffset TimeStamp, Exception? Exception)>? LogLine;
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        /// <summary>
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        /// Gets the default instance.
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        /// </summary>
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        public static SerilogEventSink Instance => instance ??= new SerilogEventSink(null);
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        /// <summary>
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        /// Emit a log event.
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        /// </summary>
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        /// <param name="logEvent">Log event to be emitted.</param>
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        public void Emit(LogEvent logEvent)
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        {
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            var message = logEvent.RenderMessage(this.formatProvider);
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            if (logEvent.Exception != null)
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            {
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                message += "\n" + logEvent.Exception;
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            }
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            this.LogLine?.Invoke(this, (message, logEvent.Level, logEvent.Timestamp, logEvent.Exception));
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        }
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    }
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}