uc_trexle_gateway.module

<?php
// $Id$
/**
 * @file
 * An Ubercart payment gateway module for Trexle.
 */

define('UC_TREXLE_GATEWAY_TEST_URL', 'https://core.trexle.com/api/v1/charges');
define('UC_TREXLE_GATEWAY_PRODUCTION_URL', 'https://sandbox.trexle.com/api/v1/charges');

/**
 * Implements hook_payment_gateway().
 */
function uc_trexle_gateway_uc_payment_gateway()
{
    $gateways['uc_trexle_gateway'] = array(
        'title' => t('Trexle payments'),
        'description' => t('Process credit card payments using Trexle'),
        'settings' => 'uc_trexle_gateway_settings_form',
        'credit' => 'uc_trexle_gateway_charge',
    );

    return $gateways;
}

/**
 * Callback function for payment gateway settings.
 */
function uc_trexle_gateway_settings_form()
{
    $form['trexle_gateway_settings'] = array(
        '#type' => 'fieldset',
        '#title' => t('Trexle settings'),
    );

    $form['trexle_gateway_settings']['uc_trexle_gateway_secret'] = array(
        '#type' => 'textfield',
        '#title' => t('API Key'),
        '#default_value' => variable_get('uc_trexle_gateway_secret', ''),
        '#description' => t("Enter you secret API key"),
    );

    $form['trexle_gateway_settings']['uc_trexle_gateway_mode'] = array(
        '#type' => 'radios',
        '#title' => t('Transaction mode'),
        '#default_value' => variable_get('uc_trexle_gateway_mode', 'test'),
        '#description' => t('No charges apply in test mode.'),
        '#options' => array(
            'test' => t('Testing'),
            'production' => t('Production'),
        ),
    );

    return $form;
}

/**
 * Callback function for the credit payment method.
 */
function uc_trexle_gateway_charge($order_id, $amount, $data)
{
    global $user;

    if (!function_exists('curl_init')) {
        drupal_set_message(t('The Trexle Payment service requires curl. Please talk to your system administrator to get this configured.'));
        return array('success' => FALSE);
    }

    // This handles the case where a user cancels their order on the checkout screen
    if (!isset($_SESSION['uc_trexle_order']) || $_SESSION['uc_trexle_order'] != $order_id) {
        $_SESSION['uc_trexle_order'] = $order_id;
        unset($_SESSION['uc_trexle_attempt']);
    }

    // If users attempts to submit order more than once then modify Order ID so
    // as to avoid a duplicate transaction error.
    $_SESSION['uc_trexle_attempt'] = empty($_SESSION['uc_trexle_attempt']) ? 1 : ($_SESSION['uc_trexle_attempt'] + 1);
    $oid = $_SESSION['uc_trexle_attempt'] > 1 ? ($order_id . '-' . $_SESSION['uc_trexle_attempt']) : $order_id;
    $order = uc_order_load($order_id);
    $shipping = $tax = $subtotal = 0;
    $description = '';
    if (is_array($order->products)) {
        foreach ($order->products as $product) {
            if (!empty($description)) {
                $description .= ' // ';
            }
            $description .= $product->title . ' x' . $product->qty;
            if ($product->data['attributes']) {
                foreach ($product->data['attributes'] as $key => $value) {
                    $description .= ', ' . $key . ': ' . $value;
                }
            }
        }
    }

    $description = drupal_substr($description, 0, 255);

    // convert some data before sending it to Trexle
    $cardexpyr = $order->payment_details['cc_exp_year'];
    $cardexpmo = sprintf("%02d", $order->payment_details['cc_exp_month']);
    $shipping = 0;
    foreach ($order->line_items as $item) {
        if ($item['type'] == 'shipping') {
            $shipping += $item['amount'];
        }
    }

    $tax = 0;
    if (module_exists('uc_taxes')) {
        foreach (uc_taxes_calculate($order) as $tax_item) {
            $tax += $tax_item->amount;
        }
    }

    if (empty($order->payment_details)) {
        drupal_set_message(t('There was a problem with this payment. No charge was made.'));
        return array('success' => FALSE);
    }

    $billingCountry = uc_get_country_data(array('country_id' => $order->billing_country));

    $trexleData = [
        'amount' => $amount * 100,
        'currency' => $order->currency,
        'description' => 'Order ID: ' . $order->order_id,
        'email' => $order->primary_email,
        'ip_address' => $_SERVER['REMOTE_ADDR'],
        'card[number]' => $order->payment_details['cc_number'],
        'card[expiry_month]' => $cardexpmo,
        'card[expiry_year]' => $cardexpyr,
        'card[cvc]' => $order->payment_details['cc_cvv'],
        'card[name]' => $order->billing_first_name . ' ' . $order->billing_last_name,
        'card[address_line1]' => empty($order->billing_street1) ? '-' : $order->billing_street1,
        'card[address_line2]' => empty($order->billing_street2) ? '-' : $order->billing_street2,
        'card[address_city]' => empty($order->billing_city) ? '-' : $order->billing_city,
        'card[address_postcode]' => empty($order->billing_postal_code) ? '000' : $order->billing_postal_code,
        'card[address_state]' => empty(uc_get_zone_code($order->billing_zone)) ? '-' : uc_get_zone_code($order->billing_zone),
        'card[address_country]' => empty($billingCountry) ? '-' : $billingCountry[0]['country_iso_code_2']
    ];

    $apiKey = variable_get('uc_trexle_gateway_secret', '');

    if (variable_get('uc_trexle_gateway_mode', 'test') == 'test') {
        $apiUrl = UC_TREXLE_GATEWAY_TEST_URL;
    } else {
        $apiUrl = UC_TREXLE_GATEWAY_PRODUCTION_URL;
    }

    $curl = curl_init($apiUrl);
    curl_setopt($curl, CURLOPT_USERPWD, $apiKey . ':');
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
    curl_setopt($curl, CURLOPT_POST, 1);
    curl_setopt($curl, CURLOPT_POSTFIELDS, $trexleData);
    curl_setopt($curl, CURLOPT_HTTPHEADER, array('Accept: application/json'));
    $response = curl_exec($curl);
    $httpcode = curl_getinfo($curl, CURLINFO_HTTP_CODE);

    if ($response) {
        $response = json_decode($response, true);
    }

    if ($httpcode == '201') {
        $message = t('Credit card processed successfully for !amount.',
            array('!amount' => uc_currency_format($amount)));
        $result = array(
            'success' => true,
            'comment' => $message,
            'message' => $message,
            'uid' => $user->uid,
        );
        unset($_SESSION['uc_trexle_attempt']);
    } else {

        if (isset($response['error'])) {
            $message = t('Transaction declined. !error',
                array('!error' => $response['detail']));
            $result = array(
                'success' => false,
                'comment' => $message,
                'message' => $message,
                'uid' => $user->uid,
            );
        } else {
            $message = t('There was a problem with this payment. No charge was made.',
                array());
            $result = array(
                'success' => false,
                'comment' => $message,
                'message' => $message,
                'uid' => $user->uid,
            );
        }
    }

    uc_order_comment_save($order_id, $user->uid, $message, 'admin');
    return $result;

}