[CmdletBinding()]
param(
    [Parameter(Mandatory = $true)]
    [string]$SiteUrl,

    [Parameter(Mandatory = $true)]
    [string]$ListTitle,

    [Parameter(Mandatory = $true)]
    [string]$ExpiryFieldInternalName
)

$isapiPath = Join-Path ([Environment]::GetFolderPath('CommonProgramFiles')) 'microsoft shared\Web Server Extensions\16\ISAPI'
Add-Type -Path (Join-Path $isapiPath 'Microsoft.SharePoint.Client.Runtime.dll')
Add-Type -Path (Join-Path $isapiPath 'Microsoft.SharePoint.Client.dll')

$context = New-Object Microsoft.SharePoint.Client.ClientContext($SiteUrl)
$context.Credentials = [System.Net.CredentialCache]::DefaultNetworkCredentials

try {
    $list = $context.Web.Lists.GetByTitle($ListTitle)
    $field = $list.Fields.GetByInternalNameOrTitle($ExpiryFieldInternalName)
    $customActions = $list.UserCustomActions
    $context.Load($list)
    $context.Load($field)
    $context.Load($customActions)
    $context.ExecuteQuery()

    Write-Host "Liste: $($list.Title)"
    Write-Host "Feld: $($field.InternalName)"
    Write-Host "Field Customizer: $($field.ClientSideComponentId)"
    Write-Host ''
    Write-Host 'List User Custom Actions:'

    $actions = @($customActions | Where-Object {
        $_.Location -like 'ClientSideExtension.ListViewCommandSet*' -or
        $_.Name -like 'ExpiryIndicator*'
    })

    if ($actions.Count -eq 0) {
        Write-Warning 'Kein ExpiryIndicator Command Set an der Liste registriert.'
    }
    else {
        $actions | Select-Object Name, Title, Location, ClientSideComponentId, ClientSideComponentProperties |
            Format-List
    }
}
finally {
    $context.Dispose()
}