Display results from Piscal processing

Error handling for Piscal processing

Core/Remote/IPiscalClient.cs

@@ -8,5 +8,6 @@ namespace LeafWeb.Core.Remote
 		PiscalStatus GetLeafInputFileStatus(PiscalLeafInputFile file);
 		IEnumerable<PiscalLeafOutputFile> RetrieveLeafOutput(PiscalLeafInputFile file);
 		void CleanupLeafProcess(PiscalLeafInputFile file);
+		string GetErrorMessage(PiscalLeafInputFile file);
 	}
 }

Core/Remote/PiscalSshClient.cs

@@ -16,6 +16,7 @@ namespace LeafWeb.Core.Remote
 
 		private const string StatusSuccess = "success";
 		private const string StatusRunning = "running";
+		private const string StatusNotStarted = "not started";
 		private const string StatusError = "error";
 
 		public PiscalSshClient(string connectionString)
@@ -62,7 +63,7 @@ namespace LeafWeb.Core.Remote
 				ssh.Disconnect();
 
 				if (command.ExitStatus != 0)
-					throw new PiscalClientException(command.Error);
+					throw new PiscalClientException(command.Result);
 
 				Console.Write(command.Result);
 			}
@@ -78,6 +79,8 @@ namespace LeafWeb.Core.Remote
 					return PiscalStatus.Running;
 				case StatusSuccess:
 					return PiscalStatus.Success;
+				case StatusNotStarted:
+					return PiscalStatus.NotStarted;
 				default:
 					return PiscalStatus.Error;
 			}
@@ -94,7 +97,7 @@ namespace LeafWeb.Core.Remote
 				ssh.Disconnect();
 
 				if (command.ExitStatus != 0)
-					throw new PiscalClientException(command.Error);
+					throw new PiscalClientException(command.Result);
 
 				return command.Result
 					.SplitNewLine()
@@ -137,6 +140,16 @@ namespace LeafWeb.Core.Remote
 			}
 		}
 
+		public string GetErrorMessage(PiscalLeafInputFile file)
+		{
+			var status = GetLeafInputStatusRaw(file);
+			if (status[0] != StatusError)
+				return string.Empty;
+
+			var errorLines = status.Skip(1).ToArray();
+			return errorLines.Join(Environment.NewLine);
+		}
+
 		public void CleanupLeafProcess(PiscalLeafInputFile file)
 		{
 			var status = GetLeafInputStatusRaw(file);

Core/Remote/PiscalStatus.cs

@@ -4,6 +4,7 @@ namespace LeafWeb.Core.Remote
 	{
 		Running,
 		Success,
+		NotStarted,
 		Error
 	}
 }

Core/Utility/StringExtensions.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Globalization;
 using System.Linq;
 using System.Text.RegularExpressions;
@@ -50,5 +51,10 @@ namespace LeafWeb.Core.Utility
 		{
 			return Regex.Replace(path, @".*/([^/]*$)", "$1");
 		}
+
+		public static string Join<T>(this IEnumerable<T> enumerable, string separator)
+		{
+			return string.Join(separator, enumerable);
+		}
 	}
 }