Private/ProcessVirtualDiskPath.ps1

$Script:DirectoryIterationMessage = "Checking directory '{0}' for any virtual hard disks (with Filter '{1}')."

function ProcessVirtualDiskPath {
    [CmdletBinding(SupportsShouldProcess)]
    param (
        [Parameter(Mandatory, Position = 0, ParameterSetName = "Path")]
        [ValidateNotNullOrEmpty()]
        [string]
        $Path,

        [Parameter(Mandatory, Position = 0, ParameterSetName = "LiteralPath")]
        [ValidateNotNullOrEmpty()]
        [string]
        $LiteralPath,

        [Parameter()]
        [string]
        $Filter
    )

    $directoryFilter = if (![string]::IsNullOrWhiteSpace($Filter)) { $Filter } else { "*.vhdx" }

    if ($PSBoundParameters.ContainsKey("Path")) {
        # ErrorAction SilentlyContinue is used here to not output multiple errors.
        $resolvedPaths = Resolve-Path -Path $Path -ErrorAction SilentlyContinue -ErrorVariable err

        if ($err) {
            Write-Error "Failed to resolve path $Path via Resolve-Path. The error was: $err"
            return
        } elseif (!$resolvedPaths) {
            Write-Warning "No items found after resolving path $Path via Resolve-Path."
            return
        }

        foreach ($resolvedPath in $resolvedPaths) {
            if (!(TestVHDFileValid $resolvedPath)) {
                continue
            }

            $item = Get-Item -LiteralPath $resolvedPath

            if ($null -eq $item) {
                Write-Verbose "Get-Item returned `$null for resolved path $resolvedPath."
                continue
            }

            if ($item -is [System.IO.FileInfo]) {
                if ($PSCmdlet.ShouldProcess($item.FullName, "Optimize-VirtualDisk")) {
                    OptimizeVirtualDisk -FilePath $item.FullName
                }
            } elseif ($item -is [System.IO.DirectoryInfo]) {
                $splat = @{
                    "LiteralPath" = "$resolvedPath"
                    "Filter" = $directoryFilter
                    "File" = $true
                }

                $directoryFiles = Get-ChildItem @splat

                if (!$directoryFiles) {
                    Write-Warning "No files found in resolved path '$resolvedPath' matching filter '$directoryFilter'."
                    continue
                }

                Write-Verbose ($Script:DirectoryIterationMessage -f $resolvedPath,$directoryFilter)

                foreach ($directoryFile in $directoryFiles) {
                    if (!(TestVHDFileValid $directoryFile.FullName)) {
                        continue
                    }

                    if ($PSCmdlet.ShouldProcess($directoryFile.FullName, "Optimize-VirtualDisk")) {
                        OptimizeVirtualDisk -FilePath $directoryFile.FullName
                    }
                }
            } else {
                $convertedResult = "$item"
                Write-Warning "Get-Item returned an unhandled type $($item.GetType()) from the path $resolvedPath. Treating it as a string and hoping for the best (it evaluated to '$convertedResult' as a string)."

                if ($PSCmdlet.ShouldProcess($convertedResult, "Optimize-VirtualDisk")) {
                    OptimizeVirtualDisk -FilePath $convertedResult
                }
            }
        }
    } elseif ($PSBoundParameters.ContainsKey("LiteralPath")) {
        if (!(TestVHDFileValid $LiteralPath)) {
            return
        }

        if (!(Test-Path -LiteralPath $LiteralPath)) {
            Write-Error "Failed to find file from literal path $LiteralPath (Test-Path evaluated to false)."
            return
        }

        $item = Get-Item -LiteralPath $LiteralPath

        if ($null -eq $item) {
            Write-Verbose "Get-Item returned `$null for literal path $LiteralPath."
            return
        }

        if ($item -is [System.IO.FileInfo]) {
            if ($PSCmdlet.ShouldProcess($item.FullName, "Optimize-VirtualDisk")) {
                OptimizeVirtualDisk -FilePath $item.FullName
            }
        } elseif ($item -is [System.IO.DirectoryInfo]) {
            $splat = @{
                "LiteralPath" = $LiteralPath
                "Filter" = $directoryFilter
                "File" = $true
            }

            $directoryFiles = Get-ChildItem @splat

            if (!$directoryFiles) {
                Write-Warning "No files found in literal path '$LiteralPath' matching filter '$directoryFilter'."
                continue
            }

            Write-Verbose ($Script:DirectoryIterationMessage -f $LiteralPath,$directoryFilter)

            foreach ($directoryFile in $directoryFiles) {
                if (!(TestVHDFileValid $directoryFile.FullName)) {
                    continue
                }

                if ($PSCmdlet.ShouldProcess($directoryFile.FullName, "Optimize-VirtualDisk")) {
                    OptimizeVirtualDisk -FilePath $directoryFile.FullName
                }
            }
        } else {
            $convertedResult = "$item"
            Write-Warning "Get-Item returned an unhandled type $($item.GetType()) from the literal path $providedLiteralPath. Treating it as a string and hoping for the best (it evaluated to '$convertedResult' as a string)."

            if ($PSCmdlet.ShouldProcess($convertedResult, "Optimize-VirtualDisk")) {
                OptimizeVirtualDisk -FilePath $convertedResult
            }
        }
    } else {
        # Sanity check.
        Write-Error "Missing both Path and LiteralPath parameters in ProcessVirtualDiskPath! Please report this."
    }
}

# Copyright (c) 2024 AJ Tek Corporation. All Rights Reserved.

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