internal/functions/test-pathexists.ps1

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<#
    .SYNOPSIS
        The multiple paths
         
    .DESCRIPTION
        Easy way to test multiple paths for public functions and have the same error handling
         
    .PARAMETER Path
        Array of paths you want to test
         
        They have to be the same type, either file/leaf or folder/container
         
    .PARAMETER Type
        Type of path you want to test
         
        Either 'Leaf' or 'Container'
         
    .PARAMETER Create
        Instruct the cmdlet to create the directory if it doesn't exist
         
    .PARAMETER ShouldNotExist
        Instruct the cmdlet to return true if the file doesn't exists
         
    .PARAMETER DontBreak
        Instruct the cmdlet NOT to break execution whenever the test condition normally should
         
    .EXAMPLE
        PS C:\> Test-PathExists "c:\temp","c:\temp\dir" -Type Container
         
        This will test if the mentioned paths (folders) exists and the current context has enough permission.
         
    .NOTES
        Author: Mötz Jensen (@splaxi)
         
#>

function Test-PathExists {
    [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSUseSingularNouns", "")]
    [CmdletBinding()]
    [OutputType([System.Boolean])]
    param (
        [Parameter(Mandatory = $True, Position = 1 )]
        [string[]] $Path,

        [ValidateSet('Leaf', 'Container')]
        [Parameter(Mandatory = $True, Position = 2 )]
        [string] $Type,

        [switch] $Create,

        [switch] $ShouldNotExist,

        [switch] $DontBreak
    )
    
    $res = $false

    $arrList = New-Object -TypeName "System.Collections.ArrayList"
         
    foreach ($item in $Path) {
        Write-PSFMessage -Level Verbose -Message "Testing the path: $item" -Target $item
        $temp = Test-Path -Path $item -Type $Type

        if ((-not $temp) -and ($Create) -and ($Type -eq "Container")) {
            Write-PSFMessage -Level Verbose -Message "Creating the path: $item" -Target $item
            $null = New-Item -Path $item -ItemType Directory -Force -ErrorAction Stop
            $temp = $true
        }
        elseif ($ShouldNotExist) {
            Write-PSFMessage -Level Verbose -Message "The should NOT exists: $item" -Target $item
        }
        elseif (-not $temp ) {
            Write-PSFMessage -Level Host -Message "The <c='em'>$item</c> path wasn't found. Please ensure the path <c='em'>exists</c> and you have enough <c='em'>permission</c> to access the path."
        }
        
        $null = $arrList.Add($temp)
    }

    if ($arrList.Contains($false) -and (-not $ShouldNotExist)) {
        if (-not $DontBreak) {
            Stop-PSFFunction -Message "Stopping because of missing paths." -StepsUpward 1
        }
    }
    elseif ($arrList.Contains($true) -and $ShouldNotExist) {
        if (-not $DontBreak) {
            Stop-PSFFunction -Message "Stopping because file exists." -StepsUpward 1
        }
    }
    else {
        $res = $true
    }

    $res
}