Add a script for managing setup options

scripts/Windows/Scripts/SetupConfig.ps1

@@ -0,0 +1,102 @@
+using namespace Microsoft.Win32;
+using namespace System.Security.AccessControl;
+using namespace System.Security.Principal;
+
+$null = New-Module {
+    [string] $configRoot = "HKLM:\Software\PortValhalla";
+    [string] $stageOption = "Stage";
+    [RegistryKey] $key = $null;
+
+    <#
+        .SYNOPSIS
+        Gets the registry key containing options related to the setup.
+    #>
+    function Get-SetupConfigKey() {
+        if (-not (Test-Path $configRoot)) {
+            $key = New-Item $configRoot;
+            $acl = Get-Acl $configRoot;
+
+            $acl.AddAccessRule(
+                [RegistryAccessRule]::new(
+                    [SecurityIdentifier]::new([WellKnownSidType]::BuiltinUsersSid, $null),
+                    [RegistryRights]::FullControl,
+                    [InheritanceFlags]::ObjectInherit -bor [InheritanceFlags]::ContainerInherit,
+                    [PropagationFlags]::None,
+                    [AccessControlType]::Allow));
+
+            Set-Acl $configRoot $acl;
+        } else {
+            $key = Get-Item $configRoot;
+        }
+
+        return $key;
+    }
+
+    <#
+        .SYNOPSIS
+        Gets the value of an option related to the setup.
+
+        .PARAMETER Name
+        The name of the option value to get.
+    #>
+    function Get-SetupOption() {
+        param(
+            [string] $Name
+        )
+
+        $key = Get-SetupConfigKey;
+
+        if ($key.GetValueNames().Contains($Name)) {
+            return $key.GetValue($Name);
+        } else {
+            return $null;
+        }
+    }
+
+    <#
+        .SYNOPSIS
+        Sets the value of an option related to the setup.
+
+        .PARAMETER Name
+        The name of the option to set.
+
+        .PARAMETER Value
+        The value to set the option to.
+    #>
+    function Set-SetupOption() {
+        param(
+            [string] $Name,
+            $Value
+        )
+
+        if ($Value -is [string]) {
+
+        }
+
+        $key = Get-SetupConfigKey;
+        return $key.SetValue($Value);
+    }
+
+    <#
+        .SYNOPSIS
+        Gets the name of the current setup stage.
+    #>
+    function Get-Stage() {
+        return Get-SetupOption $stageOption;
+    }
+
+    <#
+        .SYNOPSIS
+        Sets the current stage.
+
+        .PARAMETER Name
+        The name to set the current stage to.
+    #>
+    function Set-Stage() {
+        param(
+            [string] $Name
+        )
+
+        $null = Set-SetupOption $stageOption $Name;
+    }
+}