win_shortcut: Clean up parameter handling (#21378)

* win_shortcut: Clean up parameter handling

Minor changes.

* Implemented -WhatIf:$check_mode support

lib/ansible/modules/windows/win_shortcut.ps1

@@ -26,17 +26,17 @@ $ErrorActionPreference = "Stop"
 $params = Parse-Args $args -supports_check_mode $true
 $check_mode = Get-AnsibleParam -obj $params -name "_ansible_check_mode" -type "bool" -default $false
 
-$src = Get-AnsibleParam -obj $params -name "src" -type "path" -default $null
+$src = Get-AnsibleParam -obj $params -name "src" -type "path"
 $dest = Get-AnsibleParam -obj $params -name "dest" -type "path" -failifempty $true
-$state = Get-AnsibleParam -obj $params -name "state" -type "string" -default "present"
-$orig_args = Get-AnsibleParam -obj $params -name "args" -type "string" -default $null
-$directory = Get-AnsibleParam -obj $params -name "directory" -type "path" -default $null
-$hotkey = Get-AnsibleParam -obj $params -name "hotkey" -type "string" -default $null
-$icon = Get-AnsibleParam -obj $params -name "icon" -type "path" -default $null
-$orig_description = Get-AnsibleParam -obj $params -name "description" -type "string" -default $null
-$windowstyle = Get-AnsibleParam -obj $params -name "windowstyle" -type "string" -validateset "normal","maximized","minimized" -default $null
-
-# Expand environment variables on non-path types (Beware: turns $null into "")
+$state = Get-AnsibleParam -obj $params -name "state" -type "string" -default "present" -validateset "present","absent"
+$orig_args = Get-AnsibleParam -obj $params -name "args" -type "string"
+$directory = Get-AnsibleParam -obj $params -name "directory" -type "path"
+$hotkey = Get-AnsibleParam -obj $params -name "hotkey" -type "string"
+$icon = Get-AnsibleParam -obj $params -name "icon" -type "path"
+$orig_description = Get-AnsibleParam -obj $params -name "description" -type "string"
+$windowstyle = Get-AnsibleParam -obj $params -name "windowstyle" -type "string" -validateset "normal","maximized","minimized"
+
+# Expand environment variables on non-path types
 $args = Expand-Environment($orig_args)
 $description = Expand-Environment($orig_description)
 
@@ -58,15 +58,13 @@ $windowstyleids = @( "", "normal", "", "maximized", "", "", "", "minimized" )
 
 If ($state -eq "absent") {
     If (Test-Path -Path $dest) {
-        If ($check_mode -ne $true) {
         # If the shortcut exists, try to remove it
         Try {
-                Remove-Item -Path $dest
+            Remove-Item -Path $dest -WhatIf:$check_mode
         } Catch {
             # Report removal failure
             Fail-Json $result "Failed to remove shortcut $dest. (" + $_.Exception.Message + ")"
         }
-        }
         # Report removal success
         $result.changed = $true
     } Else {