New-ReusableCommandArgs.ps1

function New-ReusableCommandArgs {

    <#
    .SYNOPSIS
        Creates a hashtable from the pararmters supplied to the function that has called this function
    .DESCRIPTION
        Determines which values are actually being used and returns them as a hash table
        which can be easily platted to other commands
        https://www.briantist.com/how-to/splatting-psboundparameters-default-values-optional-parameters/
    #>

    [cmdletbinding()]
    param (

        # List of string corresponding to paramters that should be included
        # in the returned hashtable
        [string[]]
        $Only

        # A paramter which, if found, will return INSTEAD of the params
        # specified in "only"
        # This allows for variable logic when calling this in a variety of functions
        #[string]
        #$Or

    )

    $FunctionThatCalledThisOne = ( Get-PSCallStack )[1]
    $BoundParamsFromCallingFunction = $FunctionThatCalledThisOne.InvocationInfo.MyCommand.Parameters.GetEnumerator()

    # Get all user supplied params and the data
    $AllParams = @{}
    foreach ( $Param in $BoundParamsFromCallingFunction ) {

        $Key = $Param.Key

        try {

            $Variable = Get-Variable -Name $Key -ErrorAction Stop
            $Val = $Variable | Select-Object -ExpandProperty Value -ErrorAction Stop

            if ( ([String]::IsNullOrEmpty( $Val ) -and ( -not $PSBoundParameters.ContainsKey($key))) ) {

                throw "A blank value that wasn't supplied by the caller."

            }

            Write-LogMessage "Key: {0}. Val: {1}" $Key, $Val -Type Debug

            $AllParams[$Key] = $Val

        }

        catch {}

    }

    # return only the keys matching the string
    if ( $Only ) {

        $ReturnHashtable = @{}

        foreach ( $Key in $Only ) {

            if ( $AllParams.ContainsKey( $Key )) {

                $ReturnHashtable.$Key = $AllParams.$Key

            }

        }

        return $ReturnHashtable

    }
    else {

        return $AllParams

    }
}