Meta Shop to WooCommerce Cart Handler

Content is user-generated and unverified.
<?php
/**
 * Meta Shop to WooCommerce Cart Handler
 * Add this to your child theme's functions.php file
 */

// Handle Meta Shop checkout URL parameters
add_action('template_redirect', 'handle_meta_shop_checkout');

function handle_meta_shop_checkout() {
    // Only run on checkout page and if Meta parameters are present
    if (!is_checkout() || !isset($_GET['meta_items'])) {
        return;
    }
    
    // Clear existing cart to start fresh
    WC()->cart->empty_cart();
    
    // Meta typically sends parameters like:
    // ?meta_items=product_id:quantity,product_id:quantity
    // Adjust parsing based on Meta's actual parameter format
    
    $meta_items = sanitize_text_field($_GET['meta_items']);
    
    // Parse the items (adjust delimiter based on Meta's format)
    $items = explode(',', $meta_items);
    
    foreach ($items as $item) {
        // Split product_id and quantity
        $parts = explode(':', $item);
        
        if (count($parts) >= 2) {
            $product_id = intval($parts[0]);
            $quantity = intval($parts[1]);
            
            // Handle variation_id if present (format: product_id:quantity:variation_id)
            $variation_id = isset($parts[2]) ? intval($parts[2]) : 0;
            
            // Add to cart
            if ($variation_id > 0) {
                WC()->cart->add_to_cart($product_id, $quantity, $variation_id);
            } else {
                WC()->cart->add_to_cart($product_id, $quantity);
            }
        }
    }
    
    // Optional: Redirect to clean URL without parameters
    if (WC()->cart->get_cart_contents_count() > 0) {
        wp_safe_redirect(wc_get_checkout_url());
        exit;
    }
}

/**
 * Alternative: If Meta uses separate parameters for each item
 * Format: ?item[]=123&qty[]=2&item[]=456&qty[]=1
 */
function handle_meta_shop_checkout_array_format() {
    if (!is_checkout() || !isset($_GET['item'])) {
        return;
    }
    
    WC()->cart->empty_cart();
    
    $items = isset($_GET['item']) ? $_GET['item'] : array();
    $quantities = isset($_GET['qty']) ? $_GET['qty'] : array();
    
    foreach ($items as $index => $product_id) {
        $product_id = intval($product_id);
        $quantity = isset($quantities[$index]) ? intval($quantities[$index]) : 1;
        
        if ($product_id > 0 && $quantity > 0) {
            WC()->cart->add_to_cart($product_id, $quantity);
        }
    }
    
    if (WC()->cart->get_cart_contents_count() > 0) {
        wp_safe_redirect(wc_get_checkout_url());
        exit;
    }
}

/**
 * Generate your checkout URL for Meta Commerce Manager
 * Use this format when setting up your checkout URL in Meta
 */
function get_meta_checkout_url_example() {
    // Basic format with placeholder
    // https://yoursite.com/checkout/?meta_items={{product.id}}:{{quantity}}
    
    // Or if using array format:
    // https://yoursite.com/checkout/?item[]={{product.id}}&qty[]={{quantity}}
    
    return wc_get_checkout_url() . '?meta_items={product_id}:{quantity}';
}

/**
 * Debug function to see what parameters Meta is sending
 * Remove this after testing
 */
add_action('template_redirect', 'debug_meta_parameters');
function debug_meta_parameters() {
    if (is_checkout() && !empty($_GET)) {
        error_log('Meta Shop Parameters: ' . print_r($_GET, true));
        // You can also display on page temporarily for testing:
        // echo '<pre>'; print_r($_GET); echo '</pre>'; exit;
    }
}
Content is user-generated and unverified.