Store stages using their name

scripts/Windows/Scripts/SetupConfig.ps1

@@ -3,8 +3,8 @@ using namespace System.Security.AccessControl;
 using namespace System.Security.Principal;
 
 enum SetupStage {
-    Initialize = "init"
-    Install = "install"
+    Initialize
+    Install
 }
 
 $null = New-Module {
@@ -88,7 +88,7 @@ $null = New-Module {
         Gets the name of the current setup stage.
     #>
     function Get-Stage {
-        return Get-SetupOption $stageOption;
+        return [SetupStage](Get-SetupOption $stageOption);
     }
 
     <#
@@ -100,9 +100,13 @@ $null = New-Module {
     #>
     function Set-Stage {
         param(
-            [string] $Name
+            $Name
         )
 
+        if (-not ($Name -is [string])) {
+            $Name = ([SetupStage]$Name).ToString();
+        }
+
         $null = Set-SetupOption $stageOption $Name;
     }
 
@@ -123,4 +127,13 @@ $null = New-Module {
             $Value
         )
     }
+
+    <#
+        .SYNOPSIS
+        Checks whether the active session is executed with admin rights.
+    #>
+    function Test-Admin {
+        net session 2> $null | Out-Null;
+        return $?;
+    }
 }