Added ProgressMessaging through nlog

NzbDrone.Core/ProgressMessaging/ProgressMessagingTarget.cs

@@ -0,0 +1,82 @@
+using System;
+using NLog.Config;
+using NLog;
+using NLog.Layouts;
+using NLog.Targets;
+using NzbDrone.Common.Messaging;
+using NzbDrone.Core.Lifecycle;
+
+namespace NzbDrone.Core.ProgressMessaging
+{
+
+    public class ProgressMessagingTarget : TargetWithLayout, IHandle<ApplicationStartedEvent>, IHandle<ApplicationShutdownRequested>
+    {
+        private readonly IMessageAggregator _messageAggregator;
+        public LoggingRule Rule { get; set; }
+
+        public ProgressMessagingTarget(IMessageAggregator messageAggregator)
+        {
+            _messageAggregator = messageAggregator;
+        }
+
+        public void Register()
+        {
+            Layout = new SimpleLayout("${callsite:className=false:fileName=false:includeSourcePath=false:methodName=true}");
+
+            Rule = new LoggingRule("*", this);
+            Rule.EnableLoggingForLevel(LogLevel.Info);
+
+            LogManager.Configuration.AddTarget("ProgressMessagingLogger", this);
+            LogManager.Configuration.LoggingRules.Add(Rule);
+            LogManager.ConfigurationReloaded += OnLogManagerOnConfigurationReloaded;
+            LogManager.ReconfigExistingLoggers();
+        }
+
+        public void UnRegister()
+        {
+            LogManager.ConfigurationReloaded -= OnLogManagerOnConfigurationReloaded;
+            LogManager.Configuration.RemoveTarget("ProgressMessagingLogger");
+            LogManager.Configuration.LoggingRules.Remove(Rule);
+            LogManager.ReconfigExistingLoggers();
+            Dispose();
+        }
+
+        private void OnLogManagerOnConfigurationReloaded(object sender, LoggingConfigurationReloadedEventArgs args)
+        {
+            Register();
+        }
+
+        protected override void Write(LogEventInfo logEvent)
+        {
+            var commandId = MappedDiagnosticsContext.Get("CommandId");
+
+            if (String.IsNullOrWhiteSpace(commandId))
+            {
+                return;
+            }
+
+            var message = new ProgressMessage();
+            message.Time = logEvent.TimeStamp;
+            message.CommandId = commandId;
+            message.Message = logEvent.FormattedMessage;
+
+            _messageAggregator.PublishEvent(new NewProgressMessageEvent(message));
+        }
+
+        public void Handle(ApplicationStartedEvent message)
+        {
+            if (!LogManager.Configuration.LoggingRules.Contains(Rule))
+            {
+                Register();
+            }
+        }
+
+        public void Handle(ApplicationShutdownRequested message)
+        {
+            if (LogManager.Configuration.LoggingRules.Contains(Rule))
+            {
+                UnRegister();
+            }
+        }
+    }
+}