Private/TestCsvHeaderExists.ps1
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function TestCsvHeaderExists { [OutputType([bool])] [CmdletBinding()] param ( [Parameter(Mandatory)] [ValidateNotNullOrEmpty()] [string]$CsvFilePath, [Parameter()] [ValidateNotNullOrEmpty()] [object[]]$Header, [Parameter()] [ValidateNotNullOrEmpty()] [switch]$ParseScriptBlockHeaders ) $csvHeaders = GetCsvColumnHeaders -CsvFilePath $CsvFilePath ## Parse out the CSV headers used if the field is a scriptblock $commonHeaders = @($Header).foreach({ $_ | ForEach-Object { if ($_ -is 'scriptblock') { ## It's extremely hard to figure out what values inside of the scriptblock are actual CSV headers ## Give the option here. if ($ParseScriptBlockHeaders.IsPresent) { ParseScriptBlockHeaders -FieldScriptBlock $_ } } else { $_ } } }) ## Assuming that ParseScriptBlockHeaders was not used and all of the headers ## are scriptblocks. We check nothing but still return true. if (-not ($commonHeaders = $commonHeaders | Select-Object -Unique)) { $true } else { $matchedHeaders = $csvHeaders | Where-Object { $_ -in $commonHeaders } if (@($matchedHeaders).Count -ne @($commonHeaders).Count) { $false } else { $true } } } |