PSFramework

1.1.59

functions/utility/Select-PSFPropertyValue.ps1

function Select-PSFPropertyValue
{
<#
    .SYNOPSIS
        Expand specific property values based on selection logic.
     
    .DESCRIPTION
        This command allows picking a set of properties and then returning ...
        - All their values
        - The value that meets specific rules
        - A composite value
     
    .PARAMETER Property
        The properties to work with, in the order they should be considered.
     
    .PARAMETER Fallback
        Whether to fall back on other properties if the first one doesn't contain values.
        This picks the value of the first property that actually has a value.
     
    .PARAMETER Select
        Select either the largest or lowest propertyvalue in the Propertynames specified.
     
    .PARAMETER JoinBy
        Joins the selected properties by the string specified.
     
    .PARAMETER FormatWith
        Formats the selected properties into the specified format string.
     
    .PARAMETER InputObject
        The object(s) whose properties to inspect.
     
    .EXAMPLE
        PS C:\> Get-ADComputer -Filter * | Select-PSFPropertyValue -Property 'DNSHostName', 'Name' -Fallback
         
        For each computer in the domain, it will pick the DNSHostName if available, otherwise the Name.
#>
    [CmdletBinding(DefaultParameterSetName = 'Default')]
    param (
        [Parameter(Mandatory = $true, Position = 0)]
        [string[]]
        $Property,
        
        [Parameter(ParameterSetName = 'Fallback')]
        [switch]
        $Fallback,
        
        [Parameter(ParameterSetName = 'Select')]
        [ValidateSet('Lowest', 'Largest')]
        [string]
        $Select,
        
        [Parameter(ParameterSetName = 'Join')]
        [string]
        $JoinBy,
        
        [Parameter(ParameterSetName = 'Format')]
        [string]
        $FormatWith,
        
        [Parameter(ValueFromPipeline = $true)]
        $InputObject
    )
    
    process
    {
        foreach ($object in $InputObject)
        {
            switch ($PSCmdlet.ParameterSetName)
            {
                'Default'
                {
                    foreach ($prop in $Property)
                    {
                        $object.$Prop
                    }
                }
                'Fallback'
                {
                    foreach ($prop in $Property)
                    {
                        if ($null -ne ($object.$Prop | Remove-PSFNull -Enumerate))
                        {
                            $object.$prop
                            break
                        }
                    }
                }
                'Select'
                {
                    $values = @()
                    foreach ($prop in $Property)
                    {
                        $values += $object.$Prop
                    }
                    if ($Select -eq 'Largest') { $values | Sort-Object -Descending | Select-Object -First 1 }
                    else { $values | Sort-Object | Select-Object -First 1 }
                    
                }
                'Join'
                {
                    $values = @()
                    foreach ($prop in $Property)
                    {
                        $values += $object.$Prop
                    }
                    $values -join $JoinBy
                }
                'Format'
                {
                    $values = @()
                    foreach ($prop in $Property)
                    {
                        $values += $object.$Prop
                    }
                    $FormatWith -f $values
                }
            }
        }
    }
}