AzureFunctionRefreshCard.ps1

using namespace System.Net

# Input bindings are passed in via param block.
param($Request, $TriggerMetadata)

$action = $Request.Body.action

$uri = ""

$body = @'
{
"@context": "https://schema.org/extensions",
"@type": "MessageCard",
"themeColor": "00A4EF",
"title": "Config Change Request Received",
"text": "Your change has been submitted to the Azure Runbook. The Auto Attendant will be actionPlaceholder."
}
'@

if ($action -eq "open") {
    $actionFriendly = "opened"
}
else {
    $actionFriendly = "closed"
}

$body = $body.Replace("actionPlaceholder","$actionFriendly")

$runBookBody = @"
{
"action": "$action"
}
"@

Invoke-RestMethod -uri $uri -Method Post -ContentType "application/json" -Body $runBookBody

# Associate values to output bindings by calling 'Push-OutputBinding'.
Push-OutputBinding -Name Response -Value ([HttpResponseContext]@{
    headers = @{'content-type'='application/json'; 'charset'='utf8'; 'CARD-UPDATE-IN-BODY'='true'}
    StatusCode = [HttpStatusCode]::OK
    Body = $body
})