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ProcessProgressStatus.cs

//
// ProcessProgressStatus.cs
//
// Author:
//   Lluis Sanchez Gual
//
// Copyright (C) 2007 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//


using System;
using System.Collections.Specialized;
using System.IO;

namespace Mono.Addins.Database
{
      internal class ProcessProgressStatus: MarshalByRefObject, IProgressStatus
      {
            bool canceled;
            int logLevel;
            
            public ProcessProgressStatus (int logLevel)
            {
                  this.logLevel = logLevel;
            }
            
            public void SetMessage (string msg)
            {
                  Console.WriteLine ("process-ps-msg:" + Encode (msg));
            }
            
            public void SetProgress (double progress)
            {
                  Console.WriteLine ("process-ps-progress:" + progress.ToString ());
            }
            
            public void Log (string msg)
            {
                  if (msg.StartsWith ("plog:"))
                        // This is an special type of log that will be provided to the
                        // main process in case of a crash in the setup process
                        Console.WriteLine ("process-ps-plog:" + Encode (msg.Substring (5)));
                  else
                        Console.WriteLine ("process-ps-log:" + Encode (msg));
            }
            
            public void ReportWarning (string message)
            {
                  Console.WriteLine ("process-ps-warning:" + Encode (message));
            }
            
            public void ReportError (string message, Exception exception)
            {
                  if (message == null) message = string.Empty;
                  string et;
                  if (logLevel > 1)
                        et = exception != null ? exception.ToString () : string.Empty;
                  else
                        et = exception != null ? exception.Message : string.Empty;
                  
                  Console.WriteLine ("process-ps-exception:" + Encode (et));
                  Console.WriteLine ("process-ps-error:" + Encode (message));
            }
            
            public bool IsCanceled {
                  get { return canceled; }
            }
            
            public int LogLevel {
                  get { return logLevel; }
            }
            
            public void Cancel ()
            {
                  canceled = true;
                  Console.WriteLine ("process-ps-cancel:");
            }
            
            static string Encode (string msg)
            {
                  msg = msg.Replace ("&", "&a");
                  return msg.Replace ("\n", "&n");
            }
            
            static string Decode (string msg)
            {
                  msg = msg.Replace ("&n", "\n");
                  return msg.Replace ("&a", "&");
            }
            
            public static void MonitorProcessStatus (IProgressStatus monitor, TextReader reader, StringCollection progessLog)
            {
                  string line;
                  string exceptionText = null;
                  while ((line = reader.ReadLine ()) != null) {
                        int i = line.IndexOf (':');
                        if (i != -1) {
                              string tag = line.Substring (0, i);
                              string txt = line.Substring (i+1);
                              bool wasTag = true;
                              
                              switch (tag) {
                                    case "process-ps-msg":
                                          monitor.SetMessage (Decode (txt));
                                          break;
                                    case "process-ps-progress":
                                          monitor.SetProgress (double.Parse (txt));
                                          break;
                                    case "process-ps-log":
                                          monitor.Log (Decode (txt));
                                          break;
                                    case "process-ps-warning":
                                          monitor.ReportWarning (Decode (txt));
                                          break;
                                    case "process-ps-exception":
                                          exceptionText = Decode (txt);
                                          if (exceptionText == string.Empty)
                                                exceptionText = null;
                                          break;
                                    case "process-ps-error":
                                          string err = Decode (txt);
                                          if (err == string.Empty) err = null;
                                          monitor.ReportError (err, exceptionText != null ? new Exception (exceptionText) : null);
                                          break;
                                    case "process-ps-cancel":
                                          monitor.Cancel ();
                                          break;
                                    case "process-ps-plog":
                                          progessLog.Add (Decode (txt));
                                          break;
                                    default:
                                          wasTag = false;
                                          break;
                              }
                              if (wasTag)
                                    continue;
                        }
                        Console.WriteLine (line);
                  }
            }
      }
}

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