Refactor configuration data export and template loading functions

- Updated Export-ConfigurationData to use resolved configuration data directly and added error handling for missing data.
- Enhanced Load-Templates to streamline category loading and improve error handling for missing template directories.
- Removed Merge-ConfigurationData function as it is no longer needed.
- Refactored Merge-Templates to improve merging logic and handle default files more effectively.
- Introduced Get-TemplatePreviewData function to handle template preview data retrieval and merging.
- Added Import-OrderedPowerShellDataFile function to support ordered hashtable imports.
- Updated Update-ParametersPanel to handle parameter and variable tab updates more efficiently.
- Improved Update-TreeView to handle cases where resources are not found.
- Added new parameters to Environment.Default.psd1 for Active Directory configuration.
- Created new template BGW-LAN.psd1 for domain configuration.

Functions/Merge-Templates.ps1

@@ -1,36 +1,74 @@
 function Merge-Templates {
     $Errors = @()
-    [System.Collections.Hashtable] $ConfigurationData = @{}
-    #[System.Collections.Specialized.OrderedDictionary] $ConfigurationData = @{}
+    $MergedConfigurationData = $null
+    $MergeFiles = @()
+    $AddedDefaultFiles = @{}
 
     for ($i = 0; $i -lt $selectionList.Items.Count; $i++) {
         $item = $selectionList.Items[$i]
         $file = $item.FullName
-        if (-not (Test-Path $file)) { $Errors += "Datei nicht gefunden: $file"; continue }
 
+        if (-not (Test-Path $file)) {
+            $Errors += "Datei nicht gefunden: $file"
+            continue
+        }
+
+        $directory = Split-Path -Path $file -Parent
+        $defaultFiles = @(Get-ChildItem -Path $directory -Filter "*.psd1" -File -ErrorAction SilentlyContinue |
+            Where-Object { $_.BaseName -eq "Default" -or $_.BaseName -like "*.Default" } |
+            Sort-Object Name)
+
+        foreach($defaultFile in $defaultFiles){
+            if(-not $AddedDefaultFiles.ContainsKey($defaultFile.FullName)){
+                $MergeFiles += $defaultFile.FullName
+                $AddedDefaultFiles[$defaultFile.FullName] = $true
+            }
+        }
+
+        $MergeFiles += $file
+    }
+
+    foreach($file in $MergeFiles){
         try {
             try {
-                $TemplateData = [TemplateBuilder]::new($file).Template
+                $TemplateData = Import-PowerShellDataFile -Path $file -ErrorAction Stop
             }
             catch {
-                $Errors += "Datei konnte nicht importiert werden"
+                $Errors += "Datei konnte nicht importiert werden: $file"
                 continue
             }
 
-            $ConfigurationData = Merge-ConfigurationData -Template $ConfigurationData -Deployment $TemplateData
+            if($null -eq $MergedConfigurationData){
+                $MergedConfigurationData = $TemplateData
+            }else{
+                $MergedConfigurationData = Merge-DSCConfigurationData -Template $MergedConfigurationData -Deployment $TemplateData
+            }
         }
         catch {
             $Errors += "Fehler beim Verarbeiten $($file): $($_.Exception.Message)"
         }
     }
 
-    if ($null -ne $ConfigurationData) {
-        Update-TreeView -ConfigurationData $([TemplateBuilder]::new($ConfigurationData).ResolveDeploymentDataVariables())
-        $statusBar.SetText("Status", "Merge erfolgreich: $($selectionList.Items.Count) Dateien")
+    if ($null -ne $MergedConfigurationData) {
+        try {
+            $script:MergedConfigurationData = $MergedConfigurationData
+            $script:ResolvedConfigurationData = Resolve-DSCConfigurationData -ConfigurationData $MergedConfigurationData
+        }
+        catch {
+            $Errors += "Fehler beim Auflösen der ConfigurationData: $($_.Exception.Message)"
+            $script:ResolvedConfigurationData = $null
+        }
+
+        if($null -ne $script:ResolvedConfigurationData){
+            Update-TreeView -ConfigurationData $script:ResolvedConfigurationData
+        }else{
+            Update-TreeView -ConfigurationData $MergedConfigurationData
+        }
+
+        $statusBar.SetText("Status", "Merge erfolgreich: $($selectionList.Items.Count) Queue-Dateien, $($MergeFiles.Count) inklusive Defaults")
     }
     else {
-            
-        Update-TreeView -ConfigurationData $ConfigurationData
+        Update-TreeView -ConfigurationData $MergedConfigurationData
         $statusLabel.Text = "Merge ergab kein Ergebnis"
     }
 
@@ -38,7 +76,6 @@ function Merge-Templates {
         [System.Windows.Forms.MessageBox]::Show(($Errors -join "`r`n"), "Merge Warnungen", [System.Windows.Forms.MessageBoxButtons]::OK, [System.Windows.Forms.MessageBoxIcon]::Warning)
         return
     }
-    else {
-        return $ConfigurationData
-    }
+
+    return $script:ResolvedConfigurationData
 }