<?php

function createDonation($amount) {
    $dolibarrURL = "https://dolibarr.romanschenk.ch/api/index.php/donations";
    $BusinesspartnerID = "220";
    $ch = curl_init();

    curl_setopt($ch, CURLOPT_URL, $dolibarrURL);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, "{\"amount\": ".$amount.", \"date\": 1676545200, \"societe\": ".$BusinesspartnerID."}");

    $headers = array();
    $headers[] = 'Content-Type: application/json';
    $headers[] = 'Accept: application/json';
    $headers[] = 'Dolapikey: 4mQX4x4x65MlkGZ9HUD5A4oElqTn92kl';
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

    $result = curl_exec($ch);
    if (curl_errno($ch)) {
        echo 'Error:' . curl_error($ch);
    }
    curl_close($ch);
    return $result;
}

function forwardToDonationPage($amount){
    $payment_link = "https://dolibarr.romanschenk.ch/public/payment/newpayment.php?source=donation&ref=".(createDonation($amount))."&securekey=NSmKzZ73HW1zWO8nAlpdq95mDt77Q32o";
    header('Location: '.$payment_link);
}

$amount = (float)($_GET["amount"]);
if(is_numeric($amount) && $amount > 0) {
    forwardToDonationPage($amount);
} else {
    echo "invalid amount!";
}