Improve 'Invoke-WPFPopup' by @MyDrift-user

Thanks for the improvements :)

functions/public/Invoke-WPFPopup.ps1

@@ -1,91 +1,54 @@
 function Invoke-WPFPopup {
     param (
-        [Parameter(position=0)]
-        [ValidateSet("Show","Hide","Toggle", ErrorMessage="Action '{0}' is not part of the valid set '{1}'.")]
+        [ValidateSet("Show", "Hide", "Toggle")]
         [string]$Action = "",
 
-        [Parameter(position=1)]
         [string[]]$Popups = @(),
 
-        [Parameter(position=2)]
         [ValidateScript({
-            $PossibleActions = @("Show", "Hide", "Toggle")
-            [hashtable]$UnExpectedPairs = @{}
-            Foreach ($pair in $_.GetEnumerator()) {
-                $key = $pair.Name
-                $value = $pair.Value
-                if (-not ($value -in $PossibleActions)) {
-                    $UnExpectedPairs.Add("$key", "$value")
-                }
+            $invalid = $_.GetEnumerator() | Where-Object { $_.Value -notin @("Show", "Hide", "Toggle") }
+            if ($invalid) {
+                throw "Found invalid Popup-Action pair(s): " + ($invalid | ForEach-Object { "$($_.Key) = $($_.Value)" } -join "; ")
             }
-
-            if ($UnExpectedPairs.Count -gt 0) {
-                $UnExpectedPairsAsString = "@{"
-                Foreach ($pair in $UnExpectedPairs.GetEnumerator()) { $UnExpectedPairsAsString += "`"$($pair.Name)`" = `"$($pair.Value)`"; " }
-                $UnExpectedPairsAsString = $UnExpectedPairsAsString -replace (';\s*$', '')
-                $UnExpectedPairsAsString += "}"
-                throw "Found Unexpected pair(s), these Popup & Action pair(s) are: $UnExpectedPairsAsString"
-            }
-
-            # Return true for passing validation checks
             $true
         })]
         [hashtable]$PopupActionTable = @{}
     )
 
-    if ($PopupActionTable.Count -eq 0 -and $Action -eq "" -and $Popups.Count -eq 0) {
-        throw [GenericException]::new("No Parameter was provided, please use either 'PopupActionTable' on its own, or use 'Action' and 'Popups' on their own, depending on your use case.")
-    }
-    if ($PopupActionTable.Count -gt 0 -and ($Action -ne "" -or $Popups.Count -gt 0)) {
-        throw [GenericException]::new("Only use 'PopupActionTable' on its own, or use 'Action' and 'Popups' on their own, depending on your use case.")
+    if (-not $PopupActionTable.Count -and (-not $Action -or -not $Popups.Count)) {
+        throw "Provide either 'PopupActionTable' or both 'Action' and 'Popups'."
     }
 
-    $PopupsNotFound = [System.Collections.Generic.List[string]]::new($Popups.Count)
+    if ($PopupActionTable.Count -and ($Action -or $Popups.Count)) {
+        throw "Use 'PopupActionTable' on its own, or 'Action' with 'Popups'."
+    }
 
-    if ($PopupActionTable.Count -gt 0) {
-        Foreach ($popupActionPair in $PopupActionTable.GetEnumerator()) {
-            $popup = $popupActionPair.Name + "Popup"
-            $action = $popupActionPair.Value
-            if ($sync.$popup -eq $null) {
-                $PopupsNotFound.Add("$popup") | Out-Null
-                continue
-            }
-            switch ($action) {
-                'Show' { $actionAsBool = $true }
-                'Hide' { $actionAsBool = $false }
-                'Toggle' { $actionAsBool = -not $sync.$popup.IsOpen }
-                default { throw [GenericException]::new("Action can only be `"Show`" or `"Hide`" or `"Toggle`".") }
-            }
-            $sync.$popup.IsOpen = $actionAsBool
-        }
+    # Collect popups and actions
+    $PopupsToProcess = if ($PopupActionTable.Count) {
+        $PopupActionTable.GetEnumerator() | ForEach-Object { [PSCustomObject]@{ Name = "$($_.Key)Popup"; Action = $_.Value } }
     } else {
-        if ($Action -eq "" -or $Popups.Count -eq 0) {
-            throw [GenericException]::new("Please provide both the 'Action' and 'Popups' Parameters, with the appropriate values foreach parameter.")
+        $Popups | ForEach-Object { [PSCustomObject]@{ Name = "$_`Popup"; Action = $Action } }
+    }
+
+    $PopupsNotFound = @()
+
+    # Apply actions
+    foreach ($popupEntry in $PopupsToProcess) {
+        $popupName = $popupEntry.Name
+
+        if (-not $sync.$popupName) {
+            $PopupsNotFound += $popupName
+            continue
         }
-        Foreach ($popup in $Popups) {
-            $popup += "Popup"
-            if ($sync.$popup -eq $null) {
-                $PopupsNotFound.Add("$popup") | Out-Null
-                continue
-            }
-            switch ($action) {
-                'Show' { $actionAsBool = $true }
-                'Hide' { $actionAsBool = $false }
-                'Toggle' { $actionAsBool = -not $sync.$popup.IsOpen }
-                default { throw [GenericException]::new("Action can only be `"Show`" or `"Hide`" or `"Toggle`".") }
-            }
-            $sync.$popup.IsOpen = $actionAsBool
+
+        $sync.$popupName.IsOpen = switch ($popupEntry.Action) {
+            "Show" { $true }
+            "Hide" { $false }
+            "Toggle" { -not $sync.$popupName.IsOpen }
         }
     }
 
     if ($PopupsNotFound.Count -gt 0) {
-        $PopupsNotFoundAsString = "@("
-        Foreach ($popupNotFound in $PopupsNotFound) {
-            $PopupsNotFoundAsString += "$popupNotFound"
-            $PopupsNotFoundAsString += ", "
-        }
-        $PopupsNotFoundAsString = $PopupsNotFoundAsString -replace (',\s*$', '')
-        $PopupsNotFoundAsString += ")"
-        throw [GenericException]::new("Could not find $PopupsNotFoundAsString Popups in `$sync variable.")
+        throw "Could not find the following popups: $($PopupsNotFound -join ', ')"
     }
 }