buyairtime.php

<?php
//connect to the db in order to store the user responses
require_once "vendor/autoload.php";
include 'Driver.php';
$driver = new Driver();
use AfricasTalking\SDK\AfricasTalking;
$username = "sandbox";
$apiKey = "your africa's Talking API Key";
$AT = new AfricasTalking($username, $apiKey);
$payments = $AT->payments();
$airtime = $AT->airtime();

// Reads the variables sent via POST from Africas Talking
$sessionId   = $_POST["sessionId"];
$serviceCode = $_POST["serviceCode"];
$phoneNumber = $_POST["phoneNumber"];
$text        = $_POST["text"];

//get the last part of the text
$textArray=explode('*', $text);
$userResponse=trim(end($textArray));

//set the default level. This is to help us serve the user different menus as we progress 
$level=0;
//check the user's level
$level = $driver->checkLevel($sessionId);

if ( $level == 0) {
    $driver->insertLevel($sessionId,$phoneNumber,$level);
    // This is the first request. Note how we start the response with CON
    $response = "CON How much airtime would you like to buy?\n";
    $response .= "Minimum: 100 \n";
    $response .="Maximum: 10,000";
    $driver->updateLevel($sessionId,1);
}

else if($level==1){
        $driver->updateLevel($sessionId,2);
        $response = "CON What is your account name?\n";
        }

else if($level == 2){
    $driver->updateLevel($sessionId,3);
    $response = "CON What is your account number \n";

}
else if($level == 3){
    $driver->updateLevel($sessionId,4);
    $response = "CON Name of your bank, select from below \n";
    $response .= "0. FCMB \n";
    $response .= "1. Zenith \n";
    $response .= "2. Access \n";
    $response .= "3. Providus \n";
    $response .= "4. Sterling\n";

}
else if($level == 4){
    $driver -> updateLevel($sessionId,5);

    $response = "CON When were you born ? \n";
    $response .= "DD/MM/YYYY \n";
    $bankcode = [234001, 234002, 234003, 234007, 234010 ];
    $GLOBALS['bankCode'] = $bankcode[$userResponse];    
}
else if($level == 5){
    $driver -> updateLevel($sessionId,6);
    
    $response = "CON You're about to send NGN ".$textArray[0]."to Elizabeth for an airtime purchase.Proceed ? \n";
    $response .= "1. Okay \n";
    $response .= "2. Cancel ";
    
}
else if($level == 6 && $userResponse == 2){
    $response = "END Thank you for your time. Goodbye";
}

else if($level == 6 && $userResponse == 1){
    $driver -> updateLevel($sessionId,7);
    
    $response = "CON We are processing your request.Please enter your OTP \n";
    
    $bankAccount = ['accountName'=>$textArray[1],'accountNumber'=>$textArray[2],'bankCode'=>$final,'dateOfBirth'=>"1989"];

    $options = [ 'productName' =>  "Kibanda",
                 'bankAccount'=> $bankAccount,
                 'currencyCode'=>"NGN",
                 'amount'=>$textArray[0],
                 'narration'=>"Airtime payment"];
    $responses = $payments->bankCheckout($options);
    $tid = (array)$responses['data'];
    $GLOBALS['tid'] = $tid['transactionId'];
}
else if ($level == 7){
    $response = "END Thanks, you're airtime will arrive shortly";
    $otp = $userResponse;
    $payments-> validateBankCheckout(['transactionId'=>$tid,'otp'=>$otp]);
    $airtime->send([
    'recipients' => [    ["phoneNumber"=>$phoneNumber,"amount"=>"NGN ".$textArray[0] ],]]);
    }
    header('Content-type: text/plain');
    echo $response;
// DONE!!!    

?>