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using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Diagnostics;

using System.IO;

using System.Linq;

using System.Net.Http;

using System.Net.Http.Headers;

using System.Runtime.InteropServices;

using System.ServiceProcess;

using System.Text;

using System.Xml;

namespace SyncThingTray

{

public partial class SyngThingService : ServiceBase

{

Process syncthing;

List<DateTime> shutdowns;

public SyngThingService()

{

InitializeComponent();

}

public void TestStart() { OnStart(null); }

protected override void OnStart(string[] args)

{

if (Program.IsConfigured)

{

shutdowns = null;

StartSyncThing();

}

}

void StartSyncThing()

{

ProcessStartInfo pinfo = new ProcessStartInfo(Program.SyncExePath, "-home=\"" + Program.SyncConfigPath + "\"");

pinfo.WindowStyle = ProcessWindowStyle.Hidden;

pinfo.RedirectStandardOutput = true;

pinfo.RedirectStandardInput = true;

pinfo.UseShellExecute = false;

syncthing = new Process();

syncthing.EnableRaisingEvents = true;

syncthing.OutputDataReceived += syncthing_OutputDataReceived;

syncthing.Exited += syncthing_Exited;

syncthing.StartInfo = pinfo;

syncthing.Start();

syncthing.BeginOutputReadLine();

syncthing.PriorityClass = Program.SyncPriority;

}

void syncthing_Exited(object sender, EventArgs e)

{

string reason;

if (Program.AutoRestart)

{

if (Program.AutoRestartCount > 0)

{

if (shutdowns == null) shutdowns = new List<DateTime>();

shutdowns.Add(DateTime.Now);

shutdowns.RemoveAll(d => d < (DateTime.Now - Program.AutoRestartPeriod));

reason = shutdowns.Count <= Program.AutoRestartCount ? null : "The maximum number of shutdown has been reached";

}

else

reason = null;

}

else

reason = "The service is not configured to restart";

if (reason == null)

{

EventLog.WriteEntry("Syncthing has stopped and is being restarted", EventLogEntryType.Warning);

syncthing.OutputDataReceived -= syncthing_OutputDataReceived;

syncthing.Exited -= syncthing_Exited;

syncthing.Dispose();

StartSyncThing();

}

else

{

EventLog.WriteEntry("Syncthing has stopped and will not be restarted:\n" + reason, EventLogEntryType.Warning);

Stop();

}

}

void syncthing_OutputDataReceived(object sender, DataReceivedEventArgs e)

{

File.AppendAllLines(Program.MonitorFile, new string[] { e.Data });

}

protected override void OnStop()

{

if (!syncthing.HasExited)

{

syncthing.CancelOutputRead();

syncthing.OutputDataReceived -= syncthing_OutputDataReceived;

syncthing.Exited -= syncthing_Exited;

var res = ShutdownProgram();

if (res == null)

{

syncthing.WaitForExit(2000);

}

else

{

this.EventLog.WriteEntry("An error occured when trying to shutdown the syncthing.exe process.\n" + res, EventLogEntryType.Error);

}

if (!syncthing.HasExited)

{

try

{

StopProgram(syncthing);

}

catch (Exception x)

{

this.EventLog.WriteEntry("An error occured when trying to stop the syncthing.exe process.\nException: (" + x.GetType().ToString() + ") " + x.Message, EventLogEntryType.Error);

}

if (!syncthing.HasExited)

{

syncthing.Kill();

foreach (var proc in Process.GetProcesses().Where(p => p.StartInfo.FileName == Program.SyncExePath))

if (!proc.HasExited)

proc.Kill();

this.EventLog.WriteEntry("The syncthing.exe process could not be stopped gracefully and had to be killed", EventLogEntryType.Error);

syncthing.WaitForExit(1500);

}

else

this.EventLog.WriteEntry("The syncthing.exe process could not be shutdown and had to be closed gracefully", EventLogEntryType.Warning);

}

}

syncthing.Dispose();

File.Delete(Program.MonitorFile);

}

enum CtrlTypes : uint

{

CTRL_C_EVENT = 0,

CTRL_BREAK_EVENT,

CTRL_CLOSE_EVENT,

CTRL_LOGOFF_EVENT = 5,

CTRL_SHUTDOWN_EVENT

}

[DllImport("kernel32.dll")]

[return: MarshalAs(UnmanagedType.Bool)]

private static extern bool GenerateConsoleCtrlEvent(CtrlTypes dwCtrlEvent, uint dwProcessGroupId);

[DllImport("kernel32.dll", SetLastError = true)]

static extern bool AttachConsole(uint dwProcessId);

[DllImport("kernel32.dll", SetLastError = true, ExactSpelling = true)]

static extern bool FreeConsole();

[DllImport("Kernel32")]

private static extern bool SetConsoleCtrlHandler(EventHandler handler, bool add);

static void StopProgram(Process proc)

{

if (AttachConsole((uint)proc.Id))

{

SetConsoleCtrlHandler(null, true);

GenerateConsoleCtrlEvent(CtrlTypes.CTRL_C_EVENT, 0);

proc.WaitForExit(2000);

FreeConsole();

SetConsoleCtrlHandler(null, false);

}

}

static string ShutdownProgram()

{

string res= Program.ReadConfiguration();

if (res != null) return res;

var apires = API.CallAPIPost("shutdown");

if (!apires.Wait(2000)) return null;

return apires.Result;

}

}

}