Add custom action feature

#18

src/ShutdownTimer/Countdown.cs

@@ -18,6 +18,7 @@ public partial class Countdown : Form
         public bool Forced { get; set; } // disables all UI controls and exit dialogs
         public string Password { get; set; } // if value is not empty then a password will be required to change or disable the countdown
         public bool UserLaunch { get; set; } // false if launched from CLI
+        public string Command { get; set; } // for executing a custom command instead of a power action
 
         //private
         private FormWindowState lastStateUIFormWindowState; // used to update UI immediately after WindowState change
@@ -729,6 +730,10 @@ private void ExecutePowerAction(string choosenAction)
                 case "Lock":
                     ExitWindows.Lock();
                     break;
+
+                case "Custom Command":
+                    Process.Start(Command);
+                    break;
             }
 
             if (PreventSystemSleep)

src/ShutdownTimer/Menu.cs

@@ -18,6 +18,7 @@ public partial class Menu : Form
 
         private string checkResult;
         private string password; // used for password protection
+        private string command; // used for custom command
 
         public Menu()
         {
@@ -94,6 +95,21 @@ private void StartButton_Click(object sender, EventArgs e)
 
                 SaveSettings();
 
+                if (actionComboBox.Text.Equals("Custom Command"))
+                {
+                    ExceptionHandler.LogEvent("[Menu] Entering custom command setup");
+                    using (var form = new InputBox())
+                    {
+                        form.Title = "Custom Command";
+                        form.Message = "Please enter the command you want to have executed. If you wish to launch a file, just enter the full file path.\n\n" +
+                            "Note: Execution will use this user's permissions.";
+                        ExceptionHandler.LogEvent("[Menu] Requesting custom command from user...");
+                        var result = form.ShowDialog();
+                        ExceptionHandler.LogEvent("[Menu] Saving command");
+                        command = form.ReturnValue;
+                    }
+                }
+
                 if (SettingsProvider.Settings.PasswordProtection)
                 {
                     ExceptionHandler.LogEvent("[Menu] Enabeling password protection");
@@ -280,7 +296,8 @@ private void StartCountdown()
                 PreventSystemSleep = preventSleepCheckBox.Checked,
                 UI = !backgroundCheckBox.Checked,
                 Password = password,
-                UserLaunch = true
+                UserLaunch = true,
+                Command = command
             })
             {
                 countdown.Owner = this;