add: Create public function for merge

source/Private/Merge-CISExcelAndCsvData.ps1

@@ -0,0 +1,47 @@
+function Merge-CISExcelAndCsvData {
+    [CmdletBinding()]
+    param (
+        [Parameter(Mandatory = $true)]
+        [string]$ExcelPath,
+
+        [Parameter(Mandatory = $true)]
+        [string]$WorksheetName,
+
+        [Parameter(Mandatory = $true)]
+        [string]$CsvPath
+    )
+
+    process {
+        # Import data from Excel and CSV
+        $import = Import-Excel -Path $ExcelPath -WorksheetName $WorksheetName
+        $csvData = Import-Csv -Path $CsvPath
+
+        # Define a function to create a merged object
+        function CreateMergedObject($excelItem, $csvRow) {
+            $newObject = New-Object PSObject
+
+            foreach ($property in $excelItem.PSObject.Properties) {
+                $newObject | Add-Member -MemberType NoteProperty -Name $property.Name -Value $property.Value
+            }
+
+            $newObject | Add-Member -MemberType NoteProperty -Name 'CSV_Status' -Value $csvRow.Status
+            $newObject | Add-Member -MemberType NoteProperty -Name 'CSV_Details' -Value $csvRow.Details
+            $newObject | Add-Member -MemberType NoteProperty -Name 'CSV_FailureReason' -Value $csvRow.FailureReason
+
+            return $newObject
+        }
+
+        # Iterate over each item in the imported Excel object and merge with CSV data
+        $mergedData = foreach ($item in $import) {
+            $csvRow = $csvData | Where-Object { $_.Rec -eq $item.'recommendation #' }
+            if ($csvRow) {
+                CreateMergedObject -excelItem $item -csvRow $csvRow
+            } else {
+                CreateMergedObject -excelItem $item -csvRow ([PSCustomObject]@{Status=$null; Details=$null; FailureReason=$null})
+            }
+        }
+
+        # Return the merged data
+        return $mergedData
+    }
+}

source/Private/Update-CISExcelWorksheet.ps1

@@ -0,0 +1,33 @@
+function Update-CISExcelWorksheet {
+    [CmdletBinding()]
+    param (
+        [Parameter(Mandatory = $true)]
+        [string]$ExcelPath,
+
+        [Parameter(Mandatory = $true)]
+        [string]$WorksheetName,
+
+        [Parameter(Mandatory = $true)]
+        [psobject[]]$Data,
+
+        [Parameter(Mandatory = $false)]
+        [int]$StartingRowIndex = 2 # Default starting row index, assuming row 1 has headers
+    )
+
+    process {
+        # Load the existing Excel sheet
+        $excelPackage = Open-ExcelPackage -Path $ExcelPath
+        $worksheet = $excelPackage.Workbook.Worksheets[$WorksheetName]
+
+        if (-not $worksheet) {
+            throw "Worksheet '$WorksheetName' not found in '$ExcelPath'"
+        }
+
+
+        # Update the worksheet with the provided data
+        Update-WorksheetCells -Worksheet $worksheet -Data $Data -StartingRowIndex $StartingRowIndex
+
+        # Save and close the Excel package
+        Close-ExcelPackage $excelPackage
+    }
+}

source/Private/Update-WorksheetCells.ps1

@@ -0,0 +1,28 @@
+        function Update-WorksheetCells {
+            param (
+                $Worksheet,
+                $Data,
+                $StartingRowIndex
+            )
+
+            # Check and set headers
+            $firstItem = $Data[0]
+            $colIndex = 1
+            foreach ($property in $firstItem.PSObject.Properties) {
+                if ($StartingRowIndex -eq 2 -and $Worksheet.Cells[1, $colIndex].Value -eq $null) {
+                    $Worksheet.Cells[1, $colIndex].Value = $property.Name
+                }
+                $colIndex++
+            }
+
+            # Iterate over each row in the data and update cells
+            $rowIndex = $StartingRowIndex
+            foreach ($item in $Data) {
+                $colIndex = 1
+                foreach ($property in $item.PSObject.Properties) {
+                    $Worksheet.Cells[$rowIndex, $colIndex].Value = $property.Value
+                    $colIndex++
+                }
+                $rowIndex++
+            }
+        }