The Developer-First
eCommerce Engine for WordPress

/**
 * Display a stylish "FREE" badge instead of "$0.00" for giveaway digital goods.
 */
add_filter('omnify_format_price', function($formatted, $amount, $settings) {
    if ((float) $amount === 0.0) {
        return '<span class="badge-free" style="color:#10b981; font-weight:700;">FREE</span>';
    }
    return $formatted;
}, 10, 3);

/**
 * Append international ISO code (e.g. USD) and VAT tax indicator.
 */
add_filter('omnify_format_price', function($formatted, $amount, $settings) {
    $currency = $settings['currency'] ?? 'USD';
    return $formatted . " <span style=\"font-size:0.8em; color:#94a3b8;\">{$currency} (incl. VAT)</span>";
}, 10, 3);

/**
 * Standardize customer phone numbers to digits only and strip spaces.
 */
add_filter('omnify_before_checkout_validation', function($data, $settings, $items) {
    if (! empty($data['phone'])) {
        // Strip all non-numeric characters except leading plus '+'
        $data['phone'] = preg_replace('/[^\d+]/', '', $data['phone']);
    }

    // Sanitize customer delivery notes if provided
    if (! empty($data['delivery_notes'])) {
        $data['delivery_notes'] = sanitize_textarea_field($data['delivery_notes']);
    }

    return $data;
}, 10, 3);

/**
 * Block checkout if the customer's total purchase is less than $25.00.
 */
add_filter('omnify_after_checkout_validation', function($error, $data, $settings, $items) {
    $subtotal = 0.0;
    foreach ($items as $item) {
        $subtotal += (float) ($item['price'] ?? 0) * (int) ($item['quantity'] ?? 1);
    }

    if ($subtotal < 25.00) {
        return new \WP_Error(
            'subtotal_too_low',
            __('Our store requires a minimum purchase subtotal of $25.00.', 'my-store')
        );
    }

    return $error;
}, 10, 4);

/**
 * Reject temporary disposable emails (e.g. mailinator, tempmail) to protect digital downloads.
 */
add_filter('omnify_after_checkout_validation', function($error, $data) {
    $email = strtolower(trim($data['email'] ?? ''));
    $blocked_domains = ['mailinator.com', 'tempmail.com', '10minutemail.com', 'guerrillamail.com'];

    foreach ($blocked_domains as $domain) {
        if (str_ends_with($email, '@' . $domain)) {
            return new \WP_Error(
                'blocked_email_provider',
                __('Temporary or disposable email addresses are not permitted. Please use your real email.', 'my-store')
            );
        }
    }

    return $error;
}, 10, 2);

/**
 * Enforce in-stock only for visitors, and restrict category 'wholesale' to B2B users.
 */
add_filter('omnify_get_products_args', function($args) {
    // 1. Always hide out of stock items on public frontend
    if (! is_admin()) {
        $args['stock_status'] = 'instock';
    }

    // 2. If user is NOT a verified wholesale buyer, exclude wholesale catalog
    if (! current_user_can('wholesale_buyer')) {
        $args['exclude_category'] = 'wholesale-exclusive';
    }

    return $args;
});

/**
 * VIP customers get 48 hours (172,800s); regular customers get 1 hour (3,600s).
 */
add_filter('omnify_signed_download_expires_in', function($seconds, $file_id, $customer_id) {
    $customer = omnify()->container()->get(\Omnify\eCommerce\Repositories\Omnify_Customer_Repository::class)->find($customer_id);

    if ($customer && ($customer['group'] ?? '') === 'vip') {
        return 172800; // 48 hours in seconds
    }

    return 3600; // 1 hour for standard customers
}, 10, 3);

/**
 * Allow automated inventory sync bot using a custom Bearer token.
 */
add_filter('omnify_rest_can_manage', function($can_manage, $request) {
    $auth_header = $request->get_header('authorization') ?? '';
    $secret_token = 'erp_live_sec_994827104829104820';

    if (hash_equals('Bearer ' . $secret_token, $auth_header)) {
        return true; // Authorized external sync
    }

    return $can_manage;
}, 10, 2);

/**
 * Automatically BCC accounting team on all order confirmation emails.
 */
add_filter('omnify_email_arguments', function($args) {
    if (str_contains($args['subject'] ?? '', 'Order Confirmation')) {
        $args['headers'][] = 'Bcc: accounting@my-company.com';
    }
    return $args;
});

/**
 * Step 1: Validate custom VAT number during checkout.
 */
add_filter('omnify_after_checkout_validation', function($error, $data) {
    $vat = trim($data['vat_number'] ?? '');
    
    // If customer provided a VAT ID, ensure it has at least 8 alphanumeric characters
    if (! empty($vat) && strlen($vat) < 8) {
        return new \WP_Error('invalid_vat', __('Please provide a valid VAT / Tax registration ID.', 'my-theme'));
    }
    
    return $error;
}, 10, 2);

/**
 * Step 2: Save custom VAT and delivery instructions into Order Notes upon creation.
 */
add_action('omnify_order_created', function($order_id, $order_data) {
    $orders = omnify()->container()->get(\Omnify\eCommerce\Repositories\Omnify_Order_Repository::class);
    
    if (! empty($_POST['vat_number'])) {
        $vat = sanitize_text_field(wp_unslash($_POST['vat_number']));
        $orders->add_note($order_id, "Customer VAT / Tax ID: {$vat}", customer_visible: true);
    }

    if (! empty($_POST['delivery_notes'])) {
        $notes = sanitize_textarea_field(wp_unslash($_POST['delivery_notes']));
        $orders->add_note($order_id, "Delivery Instructions: {$notes}", customer_visible: true);
    }
}, 10, 2);

/**
 * Send real-time webhook alert to Discord or Slack when an order is paid.
 */
add_action('omnify_order_status_changed', function($order_id, $new_status) {
    // Trigger only when order reaches 'completed' or 'processing'
    if (! in_array($new_status, ['completed', 'processing'], true)) {
        return;
    }

    $order = omnify()->container()->get(\Omnify\eCommerce\Repositories\Omnify_Order_Repository::class)->find($order_id);
    if (! $order) {
        return;
    }

    $webhook_url = 'https://discord.com/api/webhooks/YOUR_WEBHOOK_URL_HERE';

    $payload = [
        'embeds' => [
            [
                'title'       => "🎉 New Order #{$order_id} Received!",
                'color'       => 3921912, // Emerald green
                'description' => "**Customer:** {$order['billing_first_name']} {$order['billing_last_name']} ({$order['email']})\n"
                               . "**Total:** {$order['currency']} \${$order['total']}\n"
                               . "**Gateway:** {$order['payment_method']}\n"
                               . "**Status:** {$new_status}",
                'timestamp'   => date('c')
            ]
        ]
    ];

    wp_remote_post($webhook_url, [
        'headers'  => ['Content-Type' => 'application/json'],
        'body'     => wp_json_encode($payload),
        'blocking' => false, // Non-blocking async dispatch for maximum performance
        'timeout'  => 5,
    ]);
}, 10, 2);

// app/products/page.tsx (Next.js 14 App Router Server Component)
interface Product {
  id: number;
  name: string;
  slug: string;
  price: number;
  sale_price: number | null;
  stock_status: string;
}

export default async function ProductsPage() {
  const res = await fetch('https://your-site.com/wp-json/omnify/v1/products/public?per_page=12', {
    next: { revalidate: 60 } // Revalidate every 60 seconds (ISR)
  });
  const products: Product[] = await res.json();

  return (
    <div className="max-w-6xl mx-auto py-12 px-4">
      <h1 className="text-3xl font-extrabold mb-8">Product Catalog</h1>
      <div className="grid grid-cols-1 sm:grid-cols-2 md:grid-cols-3 gap-6">
        {products.map((p) => (
          <div key={p.id} className="border border-slate-800 rounded-xl p-5 bg-slate-900">
            <h3 className="font-bold text-lg text-white">{p.name}</h3>
            <p className="text-sky-400 font-semibold text-xl mt-2">
              ${p.sale_price ?? p.price}
            </p>
            <a href={`/products/${p.slug}`} className="block mt-4 text-center bg-sky-500 hover:bg-sky-400 text-slate-950 font-bold py-2 rounded-lg">
              View Details
            </a>
          </div>
        ))}
      </div>
    </div>
  );
}

/**
 * Automatically mint a 16-character license key upon digital access grant.
 */
add_action('omnify_customer_access_granted', function($customer_id, $product_id) {
    // Format: XXXX-XXXX-XXXX-XXXX
    $raw_bytes   = random_bytes(8);
    $hex_string  = strtoupper(bin2hex($raw_bytes));
    $license_key = implode('-', str_split($hex_string, 4));

    // Retrieve customer details
    $customer = omnify()->container()->get(\Omnify\eCommerce\Repositories\Omnify_Customer_Repository::class)->find($customer_id);
    if (! $customer) {
        return;
    }

    // Store license key in customer options
    update_user_meta($customer['user_id'] ?? 0, "omnify_license_{$product_id}", $license_key);

    // Dispatch email to customer
    $subject = 'Your Software License Activation Key';
    $message = "Hello {$customer['first_name']},\n\n"
             . "Thank you for your order! Here is your official activation license key:\n\n"
             . "  {$license_key}\n\n"
             . "You can download your product files anytime from your customer account portal.\n\n"
             . "Best regards,\nThe Team";

    wp_mail($customer['email'], $subject, $message);
}, 10, 2);

/**
 * Automatically adjust cart subtotal based on volume quantity.
 */
add_filter('omnify_before_checkout_validation', function($data, $settings, $items) {
    $total_qty = 0;
    foreach ($items as $item) {
        $total_qty += (int) ($item['quantity'] ?? 1);
    }

    // Apply 20% discount for 5+ items, or 10% for 3+ items
    $discount_rate = 0.0;
    if ($total_qty >= 5) {
        $discount_rate = 0.20;
    } elseif ($total_qty >= 3) {
        $discount_rate = 0.10;
    }

    if ($discount_rate > 0) {
        $data['volume_discount_rate'] = $discount_rate;
    }

    return $data;
}, 10, 3);

/**
 * Set custom wire transfer orders to 'on-hold' status and append bank details.
 */
add_action('omnify_order_created', function($order_id, $order_data) {
    if (($order_data['payment_method'] ?? '') === 'wire_transfer') {
        $orders = omnify()->container()->get(\Omnify\eCommerce\Repositories\Omnify_Order_Repository::class);
        
        // Set status to 'on-hold' until bank funds clear
        $orders->update($order_id, ['status' => 'on-hold']);
        
        // Add wire instructions for customer view
        $orders->add_note(
            $order_id,
            'Bank: Chase Bank | Account: #987654321 | Routing: #123456789. Please mention Order #' . $order_id,
            customer_visible: true
        );
    }
}, 10, 2);

/**
 * Dynamically convert base USD amounts to EUR or GBP based on Cloudflare or IP headers.
 */
add_filter('omnify_format_price', function($formatted, $amount, $settings) {
    $country = $_SERVER['HTTP_CF_IPCOUNTRY'] ?? 'US';

    if (in_array($country, ['FR', 'DE', 'IT', 'ES', 'NL'], true)) {
        // EUR conversion rate (e.g. 1 USD = 0.92 EUR)
        $eur_price = number_format($amount * 0.92, 2);
        return "€{$eur_price} EUR";
    }

    if ($country === 'GB') {
        // GBP conversion rate (e.g. 1 USD = 0.79 GBP)
        $gbp_price = number_format($amount * 0.79, 2);
        return "£{$gbp_price} GBP";
    }

    return $formatted;
}, 10, 3);

/**
 * Enforce a strict 5-download limit per digital product file.
 */
add_filter('omnify_signed_download_expires_in', function($seconds, $file_id, $customer_id) {
    global $wpdb;
    $table = $wpdb->prefix . 'omnify_download_logs';

    // Count successful past downloads for this customer and file
    $download_count = (int) $wpdb->get_var($wpdb->prepare(
        "SELECT COUNT(*) FROM {$table} WHERE customer_id = %d AND file_id = %d AND status = 'success'",
        $customer_id,
        $file_id
    ));

    if ($download_count >= 5) {
        // Return 0 to immediately invalidate and expire the link
        wp_die(__('You have reached the maximum allowed downloads (5/5) for this file. Please contact support.', 'my-store'), 403);
    }

    return $seconds;
}, 10, 3);