Get-VEValueFormatter.ps1

function Get-VEValueFormatter {
    <#
        .SYNOPSIS
            Return value formatting object for a code from a site
        .DESCRIPTION
            Return value formatting object for a code from a site
        .INPUTS
            The code string can be piped to the function
        .EXAMPLE
            $Code | Get-VEValueFormatter
            Example of how to get value formatting object for a code from a site using the VRM API
        .NOTES
            Author: Decembry Quentin
    #>

    [CmdletBinding(DefaultParameterSetName='Object')]
    [OutputType([PSCustomObject])]
    [Alias()]
    param(
        # The VE site
        [Parameter(Mandatory=$true,ParameterSetName='Object')] [PSTypeName('VictronEnergy.Site')] $Site,
        
        # The VE site id
        [Parameter(Mandatory=$true,ParameterSetName='Property')] [String] $SiteId,
        
        # The code
        [Parameter(Mandatory=$true,ValueFromPipeline=$true)] [string] $Code
    )

    begin {
        if ($PSBoundParameters['Debug']) {
            $DebugPreference = 'Continue'
        }
        
        if ($MyInvocation.MyCommand.ModuleName) { 
            $Private:ThisFunction = '{0}::{1}' -f $MyInvocation.MyCommand.ModuleName, $MyInvocation.MyCommand.Name
        } else {
            $Private:ThisFunction = '{0}::{1}' -f (Get-PSCallStack)[0].ScriptName, $MyInvocation.MyCommand.Name
        }
        
        Write-Debug "[$Private:ThisFunction] Begin"
        
        if (!$SiteId) {
            $SiteId = $Site.IdSite
        }
    }
    
    process {
        Write-Debug "[$Private:ThisFunction] Process code $Code"
        
        if (!$Script:VE_ValueFormatter.$SiteId) {
            try {
                Write-Debug "[$Private:ThisFunction] Get diagnostics to fill the table with value formatting objects"
                $null = Get-VEDiagnostics -SiteId $SiteId
            } catch {
                $_ | ForEach-Object {
                    Write-Warning "[$Private:ThisFunction] $_"
                }
            }
        }
        
        if ($VF = $Script:VE_ValueFormatter.$SiteId.$Code) {
            Write-Debug "[$Private:ThisFunction] Return value formatting object"
            Write-Output -NoEnumerate -InputObject $VF
        } else {
            if ($Code -notin $Script:VE_MeasurementAttributes.Code) {
                throw "Invalid code '$Code'"
            } else {
                Write-Error "Code '$Code' unavailable"
            }
        }
    }
    
    end {
        Write-Debug "[$Private:ThisFunction] End"
    }
}

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