Private/Resolve-PortString.ps1

function Resolve-PortString {
    [CmdletBinding()]
    Param (
        [Parameter(Mandatory = $True, Position = 0)]
        [String]$PortString,

        [Parameter(Mandatory = $True, Position = 1)]
        [ValidateSet("Eos", "Exos", "Brocade")]
        [String]$SwitchType
    )

    $VerbosePrefix = "Resolve-PortString: "

    $ReturnArray = @()
    switch ($SwitchType) {
        'Eos' {
            $BladeModuleRx = [regex] '(?<bm>\w+\.\d+\.)(?<number>\d+)'
            $SemicolonSplit = $PortString.Split(';')
            foreach ($sc in $SemicolonSplit) {
                $BladeModuleMatch = $BladeModuleRx.Match($sc)
                $BladeModule = $BladeModuleMatch.Groups['bm'].Value
                $CommaSplit = $sc.Split(',')
                foreach ($c in $CommaSplit) {
                    $DashSplit = $c.Split('-')
                    $BladeModuleMatch = $BladeModuleRx.Match($DashSplit[0])
                    if ($DashSplit.Count -eq 2) {
                        if ($BladeModuleMatch.Success) {
                            $Number = $BladeModuleMatch.Groups['number'].Value
                        } else {
                            $Number = $DashSplit[0]
                        }
                        for ( $d = [int]($Number); $d -le [int]($DashSplit[1]); $d++ ) {
                            $ReturnArray += "$BladeModule$d"
                        }
                    } else {
                        if ($BladeModuleMatch.Success) {
                            $ReturnArray += $DashSplit
                        } else {
                            $ReturnArray += "$BladeModule$DashSplit"
                        }
                    }
                }
            }
            continue
        }
        'Exos' {
            $BladeModuleRx = [regex] '(?<bm>\d+:)(?<number>\d+)'
            $CommaSplit = $PortString.Split(',')
            foreach ($c in $CommaSplit) {
                $DashSplit = $c.Split('-')
                $BladeModuleMatch = $BladeModuleRx.Match($c)
                $BladeModule = $BladeModuleMatch.Groups['bm'].Value
                if ($DashSplit.Count -eq 2) {
                    if ($BladeModuleMatch.Success) {
                        $Number = $BladeModuleMatch.Groups['number'].Value
                    } else {
                        $Number = $DashSplit[0]
                    }
                    for ( $d = [int]($Number); $d -le [int]($DashSplit[1]); $d++ ) {
                        $ReturnArray += "$BladeModule$d"
                    }
                } else {
                    if ($BladeModuleMatch.Success) {
                        $ReturnArray += $DashSplit
                    } else {
                        $ReturnArray += "$BladeModule$DashSplit"
                    }
                }
            }
            continue
        }
        'Brocade' {
            Write-Verbose "$VerbosePrefix Evaluating Brocade PortString: $PortString"
            $EtheSplit = $PortString.Split('ethe ')
            foreach ($e in $EtheSplit) {
                if ($e -eq '') {
                    continue
                } else {
                    Write-Verbose "$VerbosePrefix EtheSplit: $e"
                    $BladeModuleRx = [regex] '^(?<blade>\d+\/(\d+\/)?)(?<startport>\d+)(\ to\ \d+\/(\d+\/)?(?<stopport>\d+))?'
                    $BladeModuleMatch = $BladeModuleRx.Match($e)
                    $ThisBlade = $BladeModuleMatch.Groups['blade'].Value
                    $StartPort = [int]$BladeModuleMatch.Groups['startport'].Value
                    if ($BladeModuleMatch.Groups['stopport'].Success) {
                        $StopPort = [int]$BladeModuleMatch.Groups['stopport'].Value
                    } else {
                        $StopPort = $StartPort
                    }
                    for ($p = $StartPort; $p -le $StopPort; $p++) {
                        Write-Verbose "$VerbosePrefix p: $p"
                        $ThisPort = "ethernet " + $ThisBlade + $p
                        $ReturnArray += $ThisPort
                    }
                }
            }
        }
    }

    $ReturnArray
}