Dynamic coupon for wc by exit intent custom popup (beta)

code

// place the code in the child theme functions.php or a custom code snippets plugin, like FluentSnippets


// Define the coupon discount rate
define('COUPON_DISCOUNT_RATE', 10); // 10% discount

// Enqueue custom script for exit intent detection
function enqueue_exit_intent_script() {
    if (is_cart() || is_checkout()) {
        ?>
        <script>
        jQuery(document).ready(function($) {
            var exitIntentShown = false;

            $(document).mouseleave(function(e) {
                if (e.clientY < 10 && !exitIntentShown) {
                    exitIntentShown = true;
                    $('#exit-intent-popup').fadeIn();
                }
            });

            $('#exit-intent-close').click(function() {
                $('#exit-intent-popup').fadeOut();
            });

            $('#apply-coupon').click(function() {
                var couponCode = $('#coupon-code').text();
                $.ajax({
                    url: '<?php echo admin_url('admin-ajax.php'); ?>',
                    type: 'POST',
                    data: {
                        action: 'apply_virtual_coupon',
                        coupon_code: couponCode,
                        security: '<?php echo wp_create_nonce('apply_virtual_coupon_nonce'); ?>'
                    },
                    success: function(response) {
                        if (response.success) {
                            alert('A kupon sikeresen alkalmazva!');
                            document.cookie = "used_coupon=true; path=/";
                            document.cookie = "virtual_coupon=" + couponCode + "; path=/";
                            $('#exit-intent-popup').fadeOut();
                            location.reload();
                        } else {
                            alert(response.data.message);
                        }
                    }
                });
            });
        });
        </script>
        <?php
    }
}
add_action('wp_footer', 'enqueue_exit_intent_script');

// Add popup HTML to cart and checkout pages
function add_exit_intent_popup() {
    if ((is_cart() || is_checkout()) && WC()->cart->get_cart_contents_count() > 0 && !has_used_coupon()) {
        $coupon_code = generate_virtual_coupon();
        ?>
        <div id="exit-intent-popup" style="display:none; position:fixed; top:30%; left:30%; width:40%; padding:20px; background:#fff; border:2px solid #000; z-index:1000; text-align:center;">
            <p>Biztos? És további <?php echo COUPON_DISCOUNT_RATE; ?>% kedvezménnyel vásárolhatod meg a termékeket.</p>
            <p>Kedvezmény kód: <strong id="coupon-code"><?php echo esc_html($coupon_code); ?></strong></p>
            <button id="apply-coupon">Kupon alkalmazása</button>
            <button id="exit-intent-close">Bezár</button>
        </div>
        <?php
        error_log('Popup displayed with coupon code: ' . $coupon_code);
    }
}
add_action('wp_footer', 'add_exit_intent_popup');

// Generate a virtual coupon
function generate_virtual_coupon() {
    $coupon_code = 'VIRTUAL-' . wp_generate_password(8, false);
    setcookie('virtual_coupon', $coupon_code, time() + 3600, "/"); 
    error_log('Generated virtual coupon: ' . $coupon_code);
    return $coupon_code;
}

// Check if user has used the coupon
function has_used_coupon() {
    $used_coupon = isset($_COOKIE['used_coupon']) && $_COOKIE['used_coupon'] === 'true';
    error_log('Checked used coupon: ' . ($used_coupon ? 'true' : 'false'));
    return $used_coupon;
}

// Handle AJAX request to apply virtual coupon
function apply_virtual_coupon() {
    check_ajax_referer('apply_virtual_coupon_nonce', 'security');

    if (isset($_POST['coupon_code']) && isset($_COOKIE['virtual_coupon']) && sanitize_text_field($_POST['coupon_code']) === $_COOKIE['virtual_coupon']) {
        $coupon_code = sanitize_text_field($_POST['coupon_code']);
        error_log('Applying coupon code: ' . $coupon_code);

        $args = array(
            'post_type' => 'shop_coupon',
            'post_status' => 'publish',
            'title' => $coupon_code,
            'posts_per_page' => 1
        );
        $existing_coupon_query = new WP_Query($args);
        if ($existing_coupon_query->have_posts()) {
            error_log('Coupon already exists: ' . $coupon_code);
            wp_send_json_error(array('message' => 'Coupon already exists.'));
        }

        $coupon = array(
            'post_title' => $coupon_code,
            'post_content' => '',
            'post_excerpt' => 'Virtuális kupon ' . COUPON_DISCOUNT_RATE . '% kedvezmény',
            'post_status' => 'publish',
            'post_author' => 1,
            'post_type' => 'shop_coupon'
        );

        $new_coupon_id = wp_insert_post($coupon);
        error_log('Created new coupon with ID: ' . $new_coupon_id);

        update_post_meta($new_coupon_id, 'discount_type', 'percent');
        update_post_meta($new_coupon_id, 'coupon_amount', COUPON_DISCOUNT_RATE);
        update_post_meta($new_coupon_id, 'individual_use', 'yes');
        update_post_meta($new_coupon_id, 'usage_limit', '1');
        update_post_meta($new_coupon_id, 'expiry_date', date('Y-m-d', strtotime('+1 day')));
        update_post_meta($new_coupon_id, 'apply_before_tax', 'yes');
        update_post_meta($new_coupon_id, 'free_shipping', 'no');

        // Apply the coupon to the cart
        $result = WC()->cart->apply_coupon($coupon_code);
        if ($result) {
            error_log('Coupon applied to cart: ' . $coupon_code);
        } else {
            error_log('Failed to apply coupon to cart: ' . $coupon_code);
        }

        // Set cookies via server-side to ensure security
        setcookie('used_coupon', 'true', time() + 3600, "/");
        setcookie('virtual_coupon', $coupon_code, time() + 3600, "/");

        wp_send_json_success(array(
            'message' => 'Coupon applied successfully',
            'coupon_code' => $coupon_code
        ));
    } else {
        error_log('Invalid coupon code or no matching cookie found.');
        wp_send_json_error(array('message' => 'Invalid coupon code.'));
    }
}
add_action('wp_ajax_apply_virtual_coupon', 'apply_virtual_coupon');
add_action('wp_ajax_nopriv_apply_virtual_coupon', 'apply_virtual_coupon');

// Add a function to check if the coupon was removed and reset the cookies
function check_coupon_removal() {
    if (is_cart() || is_checkout()) {
        if (isset($_COOKIE['used_coupon']) && $_COOKIE['used_coupon'] === 'true') {
            if (!empty($_COOKIE['virtual_coupon']) && !WC()->cart->has_discount($_COOKIE['virtual_coupon'])) {
                error_log('Coupon removed from cart: ' . $_COOKIE['virtual_coupon']);
                setcookie('used_coupon', '', time() - 3600, "/");
                setcookie('virtual_coupon', '', time() - 3600, "/");
                error_log('Cookies reset.');
            }
        }
    }
}
add_action('template_redirect', 'check_coupon_removal');