feat: Implement upsell functionality with repository and service layers

public/hooks/analytics-hooks.php

@@ -0,0 +1,53 @@
+<?php
+// Prevent direct access
+if (!defined('ABSPATH')) {
+    exit;
+}
+
+use Sodino\Repositories\EventRepository;
+use Sodino\Services\TrackingService;
+
+function sodino_get_tracking_service() {
+    static $service = null;
+
+    if ($service === null) {
+        $eventRepository = new EventRepository();
+        $service = new TrackingService($eventRepository);
+    }
+
+    return $service;
+}
+
+add_action('template_redirect', 'sodino_track_product_view');
+add_action('woocommerce_add_to_cart', 'sodino_track_add_to_cart', 10, 6);
+add_action('woocommerce_before_checkout_form', 'sodino_track_checkout_start');
+add_action('woocommerce_thankyou', 'sodino_track_purchase', 10, 1);
+
+function sodino_track_product_view() {
+    if (is_admin() || !is_singular('product')) {
+        return;
+    }
+
+    $product_id = get_the_ID();
+    if (!$product_id) {
+        return;
+    }
+
+    sodino_get_tracking_service()->trackProductView($product_id);
+}
+
+function sodino_track_add_to_cart($cart_item_key, $product_id, $quantity, $variation_id, $variation, $cart_item_data) {
+    sodino_get_tracking_service()->trackAddToCart($product_id, $variation_id, $quantity);
+}
+
+function sodino_track_checkout_start() {
+    if (is_admin()) {
+        return;
+    }
+
+    sodino_get_tracking_service()->trackCheckoutStart();
+}
+
+function sodino_track_purchase($order_id) {
+    sodino_get_tracking_service()->trackPurchase($order_id);
+}