Send message to telegram on new Windows Server RDP connection

telegramNotify.ps1

# .\telegramNotify.ps1 -WindowStyle Hidden -botToken "{YOUR_BOTTOKEN}" -chatId "{YOUR_CHAT_ID}"
param ($botToken, $chatId)

Add-Type -AssemblyName System.Web
[string]$dateFormat = "yyyy/MM/dd HH:mm"
[string]$endPoint = "https://api.telegram.org/bot$botToken/sendMessage"

# Unicode chars
[char]$nl = [char]::ConvertFromUtf32(0x000A)
[String]$computerEmoji = [char]::ConvertFromUtf32(0x1F5A5)
[String]$userEmoji = [char]::ConvertFromUtf32(0x1F464)
[String]$calEmoji = [char]::ConvertFromUtf32(0x1F4C5)

[string]$logname = 'Microsoft-Windows-TerminalServices-LocalSessionManager/Operational'
[int32]$logid = 21
# Get the last item and convert to xml
$eventVal = Get-WinEvent -FilterHashtable @{Logname=$logname;ID=$logid} -MaxEvents 1
[xml]$evt = $eventVal[0].ToXml()

# Event details
[string]$dateTime = [datetime]::Parse($evt.Event.System.TimeCreated.GetAttribute('SystemTime')).ToString($dateFormat)
[string]$userName = $evt.Event.UserData.EventXML.User
[string]$userIp = $evt.Event.UserData.EventXML.Address

# Message lines
[string]$firstString = "New RDP connection"
[string]$dateString = $calEmoji +' `' + $dateTime + '`'
[string]$userString = $userEmoji +' `' + $userName + '`'
[string]$ipString = $computerEmoji +' `' + $userIp + '`'

# Final string
[string]$messageString = $firstString + $nl + $dateString + $nl +  $userString + $nl + $ipString

$messageString = [System.Web.HTTPUtility]::UrlEncode($messageString)

# Building request url
$requestUrl = $endPoint +"?chat_id=$chatId" +"&parse_mode=Markdown" + "&text=" + $messageString
Invoke-WebRequest -Method GET -Uri $requestUrl