uc_stripejs.module

<?php

define('stripe_sk', 'STRIPE_SECRET_KEY');
define('stripe_pk', 'STRIPE_PUBLIC_KEY');

drupal_add_js('https://js.stripe.com/v2/');
drupal_add_js(array('stripe_js_pk' => stripe_pk), 'setting');
drupal_add_js(drupal_get_path('module', 'uc_stripejs') . '/uc_stripejs.js');

/**
 * Implements hook_uc_payment_method().
 */
function uc_stripejs_uc_payment_method() {
    $title1 = t('Credit/Debit card payments via Stripe.');

    $cc_types = array(
        'visa' => t('Visa'),
        'mastercard' => t('MasterCard'),
        'discover' => t('Discover'),
        'amex' => t('American Express'),
        'echeck' => t('eCheck'),
    );

    $methods[] = array(
        'id' => 'stripe_js',
        'name' => t('StripeJS Payments'),
        'title' => $title1,
        'review' => t('Credit / Debit Card'),
        'desc' => t('Takes credit card payments via StripeJS.'),
        'callback' => 'uc_stripejs_uc_payment_method_callback',
        'credit' => 'uc_stripejs_charge',
        'weight' => 1,
        'checkout' => FALSE,
        'no_gateway' => TRUE,
    );

    return $methods;
}

/**
 * Implements hook_uc_payment_method().
 */
function uc_stripejs_uc_payment_method_callback($op, &$order, $form = NULL, &$form_state = NULL) {
    switch($op){
        case 'cart-details':
            $details = uc_stripejs_method_credit_form(array(), $form_state, $order);

            return $details;
            break;
        case 'cart-process':
            // Fetch the CC details from the $_POST directly.
            $cc_data = $form_state['values']['panes']['payment']['details'];

            // Go ahead and put the CC data in the payment details array.
            $order->payment_details = $cc_data;

            $return = TRUE;
            // Validate that a StripeToken has been set
            if (empty($cc_data['stripeToken'])) {
                form_set_error('panes][payment][details][cc_number', t('You have entered an invalid credit card number.'));
                $return = FALSE;
            }

            // Initialize the encryption key and class.
            $key = uc_credit_encryption_key();
            $crypt = new UbercartEncryption();

            // Store the encrypted details in the session for the next pageload.
            // We are using base64_encode() because the encrypt function works with a
            // limited set of characters, not supporting the full Unicode character
            // set or even extended ASCII characters that may be present.
            // base64_encode() converts everything to a subset of ASCII, ensuring that
            // the encryption algorithm does not mangle names.
            $_SESSION['sescrd'] = $crypt->encrypt($key, base64_encode(serialize($order->payment_details)));

            // Log any errors to the watchdog.
            uc_store_encryption_errors($crypt, 'uc_credit');

            // If we're going to the review screen, set a variable that lets us know
            // we're paying by CC.
            if ($return) {
                $_SESSION['stripe_pay'] = TRUE;
            }

            return $return;
            break;
    }
}

function uc_stripejs_method_credit_form($form, &$form_state, $order){

    if (!isset($order->payment_details)) {
        $order->payment_details = array();
    }

    $form['cc_policy'] = array(
        '#markup' => '<p>' . variable_get('uc_credit_policy', t('Your billing information must match the billing address for the credit card entered below or we will be unable to process your payment.')) . '</p>'
    );

    $form['cc_error'] = array(
        '#markup' => '<div class="messages error stripe-error-message" style="display: none;"><span class="message"></span></div>'
    );

    $form['cc_number'] = array(
        '#type' => 'textfield',
        '#title' => t('Card number'),
        '#attributes' => array('autocomplete' => 'off', 'data-stripe' =>  'number'),
        '#size' => 20,
        '#maxlength' => 19,
        '#name' => ''
    );

    /**
     * Expiration Date
     */
    $form['cc_exp_month'] = uc_select_month(t('Expiration date'), 1) + array('#name' => '', '#attributes' => array('data-stripe' => 'exp-month'));
    $form['cc_exp_year']  = uc_select_year(t('Expiration year'), date('Y')) + array('#name' => '', '#attributes' => array('data-stripe' => 'exp-year'));

    if (variable_get('uc_credit_cvv_enabled', TRUE)) {
        $form['cc_cvv'] = array(
            '#type' => 'textfield',
            '#title' => t('CVV'),
            '#default_value' => NULL,
            '#attributes' => array('autocomplete' => 'off', 'data-stripe' => 'cvc'),
            '#size' => variable_get('uc_credit_amex', TRUE) ? 4 : 3,
            '#maxlength' => variable_get('uc_credit_amex', TRUE) ? 4 : 3,
            '#field_suffix' => theme('uc_credit_cvv_help'),
            '#name' => ''
        );
    }

    $form['stripeToken'] = array(
        '#type' => 'hidden',
        '#size' => 20,
        '#maxlength' => 19,
    );

    unset($_SESSION['clear_cc']);

    return $form;
}

/**
 * Implements hook_uc_order().
 */
function uc_stripejs_uc_order($op, $order, $arg2) {
    // Set up the encryption key and object for saving and loading.
    if (isset($order->payment_method) && $order->payment_method == 'stripe_js' && ($op == 'save' || $op == 'load')) {
        // Log an error if encryption isn't configured properly.
        if (!uc_credit_encryption_key()) {
            watchdog('uc_credit', 'Credit card encryption must be set up to process credit cards.');
        }
    }

    switch ($op) {
        case 'submit':
            if (isset($order->payment_method) && $order->payment_method == 'stripe_js') {
                require_once 'sites/all/libraries/stripe/lib/Stripe.php';
                Stripe::setApiKey(stripe_sk);

                // Clear out that session variable denoting this as a CC paid order.
                unset($_SESSION['cc_pay']);

                // Process CC transactions when an order is submitted after review.
                $gateway_id = uc_credit_default_gateway();
                $data = array(
                    'txn_type' => variable_get('uc_pg_' . $gateway_id . '_cc_txn_type', UC_CREDIT_AUTH_CAPTURE),
                );

                // Attempt to process the CC payment.
                $order->payment_details = uc_credit_cache('load');
                $total = $order->order_total * 100;
                if($total / 100 != $order->order_total){
                    return false;
                }

                /**
                 * Process the payment here
                 */
                $pass = true;
                $stripeToken = $order->payment_details['stripeToken'];

                try {
                    Stripe_Charge::create(
                        array(
                            "amount" => $total,
                            "currency" => "gbp",
                            "card" => $stripeToken
                        )
                    );
                }
                catch (Exception $e) {
                    $pass = false;
                }

                // If the payment failed, store the data back in the session and
                // halt the checkout process.
                if (!$pass) {
                    $message = variable_get('uc_credit_fail_message', t('We were unable to process your credit card payment. Please verify your details and try again.  If the problem persists, contact us to complete your order.'));
                    return array(array('pass' => FALSE, 'message' => $message));
                }

                return true;
            }
            break;

        case 'save':
            if (isset($order->payment_method) && $order->payment_method == 'credit' && !empty($order->payment_details)) {
                _uc_credit_save_cc_data_to_order($order->payment_details, $order->order_id);
            }
            break;

        case 'load':
            if (isset($order->payment_method) && $order->payment_method == 'credit') {
                // Load the CC details from the credit cache if available.
                $order->payment_details = uc_credit_cache('load');

                // Otherwise load any details that might be stored in the data array.
                if (empty($order->payment_details) && isset($order->data['cc_data'])) {
                    $order->payment_details = uc_credit_cache('save', $order->data['cc_data']);
                }
            }
            break;
    }
}