InsertDateHandler.cs

namespace FooBarIde
{
	class InsertDateHandler : CommandHandler
	{
		protected override void Run()
		{
			Document doc = IdeApp.Workbench.ActiveDocument;

			try
			{
				var lineCount = doc.Editor.LineCount;

				var lines = new List<MonoDevelop.Ide.Editor.IDocumentLine>();
				for (var i = 0; i < lineCount; i++)
				{
					var x = doc.Editor.GetLine(i);
					if (x != null)
	                    lines.Add(x);
				}

				var result =
					lines.Where(x =>
					{
						var line = doc.Editor.GetLineText(x.LineNumber);
						return line.Contains("open");
					});
				if (result.Any())
				{
					var lineNumber = result.OrderByDescending(x => x.LineNumber).First();
					var text = "open Foo";
					doc.Editor.InsertText(lineNumber.EndOffsetIncludingDelimiter, text);
					doc.Editor.InsertText(lineNumber.EndOffsetIncludingDelimiter + text.Length, "\n");
				}
				else
				{
					var openeing =
						lines.Where(x =>
						{
							var line = doc.Editor.GetLineText(x.LineNumber);
							return line.Contains("module") || line.Contains("namesapce");
						});
					if (result.Count() != 0)
					{
						var lineNumber = openeing.OrderByDescending(x => x.LineNumber).First();
						doc.Editor.InsertText(lineNumber.Offset + lineNumber.Length + 1, "open Foo\n");
					}
					else
					{
						var lineNumber = openeing.OrderByDescending(x => x.LineNumber).First();
						doc.Editor.InsertText(0, "open Foo");
					}
				}
			}
			catch (Exception e)
			{
				MessageService.ShowError("Something failed", "Error details", e);
				LoggingService.LogInternalError("Something failed...", e);
			}
		}

		protected override void Update(CommandInfo info)
		{
			Document doc = IdeApp.Workbench.ActiveDocument;
			info.Enabled = doc != null && doc.Editor != null;

		}
	}

	public enum DateInserterCommands
	{
		InsertDate,
	}
}