Telegram example

gistfile1.txt

# ------------------------------------------------------------------------------------------------------------------------
#                                         Preferences
# ------------------------------------------------------------------------------------------------------------------------

# Setting StrictMode to enforce Coding Best Practices.
Set-StrictMode -Version 2.0 

# Setting the Error Preference variable to stop to make sure that non terminating errors do terminate.
$ErrorActionPreference = 'Stop'

# Verbose preference, should be toggled with the parameter -Verbose.
#$VerbosePreference = 'Continue'

# Debug preference, generates more logging should be toggled with the parameter -Verbose.
#$DebugPreference = 'Continue'

# ------------------------------------------------------------------------------------------------------------------------
#                                               Settings
# ------------------------------------------------------------------------------------------------------------------------

# -----------------------------------------------------------
#                                                   Telegram


$TelegramAuthorizedChats = @(
    @{ID='853881768'; Roles=@('Subscriber', 'Member')}
    @{ID='-336683942'; Roles=@('Subscriber', 'Member')}    
)

# ------------------------------------------------------------------------------------------------------------------------
#                                               Functions
# ------------------------------------------------------------------------------------------------------------------------

# -----------------------------------------------------------
#                                          Connect-TelegramBot

Function Connect-TelegramBot {
    Param (
        [String] $Token
    )


    $Global:TelegramBot = @{
        #Name = 'dd'
        #DisplayName = '..' 
        Token = $Token
    }

    # Make sure thath older updates (messages) arent proccesed by retrieving the latest update from the queu.
    $BotMessagesHistory = (Invoke-RestMethod -Uri "https://api.telegram.org/bot$($Token)/getUpdates").result
    $GLobal:LatestUpdateID = $BotMessagesHistory | Select-Object -Last 1 | Select-Object -ExpandProperty update_id

}
# -----------------------------------------------------------
#                                    Get-TelegramBotMessages

Function Get-TelegramBotMessages {
    
    # Recieve Messages from BotMessageQue
    (Invoke-RestMethod -Uri "https://api.telegram.org/bot$($Global:TelegramBot.Token)/getUpdates").result

}
# -----------------------------------------------------------
#                                 Send-TelegramBotChatMessage

Function Send-TelegramBotChatMessage {
    Param (
        [String] $ChatID,
        [String] $Message,
        [String] $Token = $Global:TelegramBot.Token
    )

    $APICall = @{
        Uri = "https://api.telegram.org/bot$($Token)/sendMessage?chat_id=$($ChatID)&text=$($Message -join '%0A')"    
    }
    
    Return Invoke-RestMethod @APICall

}

# -----------------------------------------------------------
#                                Invoke-MigrationStatusUpdate

Function Invoke-MigrationStatusUpdate {
    Param (
        [Parameter(Mandatory=$true)]
        [ValidateSet("User", "Batch", "MoveRequest")]
        [String] $Type,


        [Parameter(Mandatory=$true)]        
        [ValidateNotNullOrEmpty()]        
        [String] $Name
    )


    $null = Send-TelegramBotChatMessage -ChatID $BotMessage.message.chat.id -Message "A moment please, retrieving results for $($Type) '$($Name)'"



    return "status is failed"
}


Connect-TelegramBot -Token '..'


while ($true) {
    Start-Sleep -s 5

    $BotMessages = Get-TelegramBotMessages
    
    # Filter on new messages from AuthorizedChats
    $BotMessages = $BotMessages | Where-Object {
        $PSItem.update_id -gt $LatestUpdateID -and
        $PSItem.message.chat.id -in $TelegramAuthorizedChats.ID
    }

    Foreach ($BotMessage in $BotMessages) {
        
        Try { 
            Switch -Regex ($BotMessage.message.text) {
                "^/Start" {
                    $Message = @(
                        "Thank you for contacting me, see below for a list of options:"
                        ""
                        "/status user|batch name"
                    )

                }

                "^/status" {
            
                    $Args = $BotMessage.message.text -split ' '
                    $Message = Invoke-MigrationStatusUpdate -Type $Args[1] -Name ($Args[2..$Arg.Length] -join ' ')
                }


                Default {
                    $Message = "Could not answer the question '$($BotMessage.message.text)', please use /start for help."
                }
            }
        } 

        Catch {
            $Message = "$($_)"
        }

        #Format BaseMessage
        $TelegramMessage = @{
            ChatID = $BotMessage.message.chat.id
            Message = $Message
        }

        # Send Message
        $null = Send-TelegramBotChatMessage @TelegramMessage
        $Global:LatestUpdateID = $BotMessage.update_id
    }

}




$MyBotUpdates = Invoke-WebRequest -Uri "https://api.telegram.org/bot$($MyToken)/getUpdates"
#Convert the result from json and put them in an array
$jsonresult = [array]($MyBotUpdates | ConvertFrom-Json).result
 
$LastMessage = ""
Foreach ($Result in $jsonresult)  {
  If ($Result.message.chat.id -eq $ChatID)  {
    $LastMessage = $Result.message.text
  }
}
 
Write-Host "The Last Message sent from others to this conversation is $($LastMessage)"