RaspberryIO_26/Swan.Lite/Logging/ConsoleLogger.cs

using System;
using Swan.Lite.Logging;

namespace Swan.Logging {
  /// <summary>
  /// Represents a Console implementation of <c>ILogger</c>.
  /// </summary>
  /// <seealso cref="ILogger" />
  public class ConsoleLogger : TextLogger, ILogger {
    /// <summary>
    /// Initializes a new instance of the <see cref="ConsoleLogger"/> class.
    /// </summary>
    protected ConsoleLogger() {
      // Empty
    }

    /// <summary>
    /// Gets the current instance of ConsoleLogger.
    /// </summary>
    /// <value>
    /// The instance.
    /// </value>
    public static ConsoleLogger Instance { get; } = new ConsoleLogger();

    /// <summary>
    /// Gets or sets the debug logging prefix.
    /// </summary>
    /// <value>
    /// The debug prefix.
    /// </value>
    public static String DebugPrefix { get; set; } = "DBG";

    /// <summary>
    /// Gets or sets the trace logging prefix.
    /// </summary>
    /// <value>
    /// The trace prefix.
    /// </value>
    public static String TracePrefix { get; set; } = "TRC";

    /// <summary>
    /// Gets or sets the warning logging prefix.
    /// </summary>
    /// <value>
    /// The warn prefix.
    /// </value>
    public static String WarnPrefix { get; set; } = "WRN";

    /// <summary>
    /// Gets or sets the fatal logging prefix.
    /// </summary>
    /// <value>
    /// The fatal prefix.
    /// </value>
    public static String FatalPrefix { get; set; } = "FAT";

    /// <summary>
    /// Gets or sets the error logging prefix.
    /// </summary>
    /// <value>
    /// The error prefix.
    /// </value>
    public static String ErrorPrefix { get; set; } = "ERR";

    /// <summary>
    /// Gets or sets the information logging prefix.
    /// </summary>
    /// <value>
    /// The information prefix.
    /// </value>
    public static String InfoPrefix { get; set; } = "INF";

    /// <summary>
    /// Gets or sets the color of the information output logging.
    /// </summary>
    /// <value>
    /// The color of the information.
    /// </value>
    public static ConsoleColor InfoColor { get; set; } = ConsoleColor.Cyan;

    /// <summary>
    /// Gets or sets the color of the debug output logging.
    /// </summary>
    /// <value>
    /// The color of the debug.
    /// </value>
    public static ConsoleColor DebugColor { get; set; } = ConsoleColor.Gray;

    /// <summary>
    /// Gets or sets the color of the trace output logging.
    /// </summary>
    /// <value>
    /// The color of the trace.
    /// </value>
    public static ConsoleColor TraceColor { get; set; } = ConsoleColor.DarkGray;

    /// <summary>
    /// Gets or sets the color of the warning logging.
    /// </summary>
    /// <value>
    /// The color of the warn.
    /// </value>
    public static ConsoleColor WarnColor { get; set; } = ConsoleColor.Yellow;

    /// <summary>
    /// Gets or sets the color of the error logging.
    /// </summary>
    /// <value>
    /// The color of the error.
    /// </value>
    public static ConsoleColor ErrorColor { get; set; } = ConsoleColor.DarkRed;

    /// <summary>
    /// Gets or sets the color of the error logging.
    /// </summary>
    /// <value>
    /// The color of the error.
    /// </value>
    public static ConsoleColor FatalColor { get; set; } = ConsoleColor.Red;

    /// <inheritdoc />
    public LogLevel LogLevel { get; set; } = DebugLogger.IsDebuggerAttached ? LogLevel.Trace : LogLevel.Info;

    /// <inheritdoc />
    public void Log(LogMessageReceivedEventArgs logEvent) {
      // Select the writer based on the message type
      TerminalWriters writer = logEvent.MessageType == LogLevel.Error ? TerminalWriters.StandardError : TerminalWriters.StandardOutput;

      (String outputMessage, ConsoleColor color) = this.GetOutputAndColor(logEvent);

      Terminal.Write(outputMessage, color, writer);
    }

    /// <inheritdoc />
    public void Dispose() {
      // Do nothing
    }
  }
}