Feature: Recommendation Service

This commit introduces a RecommendationService that is used when indexing products.

The service is utilizing a recommendation rules interface, so many rules can be created and applied during indexing the products

src/Providers/CatalogServiceProvider.php

@@ -2,17 +2,32 @@
 
 namespace Modules\Core\Providers;
 
+use Illuminate\Console\Scheduling\Schedule;
+use Illuminate\Support\Facades\Event;
 use Illuminate\Support\ServiceProvider;
+use Lunar\Models\Product;
 use Lunar\Models\ProductOption;
 use Lunar\Models\ProductOptionValue;
+use Modules\Core\Catalog\Events\ProductDeleted;
+use Modules\Core\Catalog\Events\ProductSaved;
+use Modules\Core\Catalog\Listeners\ReindexProductsRecommendingProduct;
 use Modules\Core\Catalog\Observers\ProductOptionReindexObserver;
 use Modules\Core\Catalog\OptionTypes\ColorOptionType;
 use Modules\Core\Catalog\Services\ProductOptionTypeManager;
 
 class CatalogServiceProvider extends ServiceProvider
 {
+    public function register(): void
+    {
+        $this->mergeConfigFrom(__DIR__ . '/../../config/catalog.php', 'catalog');
+    }
+
     public function boot(): void
     {
+        $this->publishes([
+            __DIR__ . '/../../config/catalog.php' => config_path('catalog.php'),
+        ], 'core-config');
+
         ProductOptionTypeManager::get()->register([
             ColorOptionType::class,
         ]);
@@ -24,5 +39,28 @@ class CatalogServiceProvider extends ServiceProvider
 
         ProductOptionValue::saved(fn (ProductOptionValue $value) => $observer->valueSaved($value));
         ProductOptionValue::deleted(fn (ProductOptionValue $value) => $observer->valueDeleted($value));
+
+        Product::saved(fn (Product $product) => Event::dispatch(new ProductSaved($product)));
+        Product::deleted(fn (Product $product) => Event::dispatch(new ProductDeleted($product->id)));
+
+        Event::listen(ProductSaved::class, [ReindexProductsRecommendingProduct::class, 'handleSaved']);
+        Event::listen(ProductDeleted::class, [ReindexProductsRecommendingProduct::class, 'handleDeleted']);
+
+        $this->app->booted(function () {
+            // A full nightly reindex, on top of the per-event reindexing
+            // above — catches everything event-driven reindexing
+            // deliberately doesn't cover: a newly-created product not yet
+            // appearing as a recommendation elsewhere, in_stock/price
+            // drifting from an order decrementing stock outside a product
+            // save, and any other staleness ProductIndexer's own docblock
+            // already documents as accepted between reindexes. --refresh
+            // re-syncs filterable/sortable field settings too, not just
+            // documents, so a deploy that changed ProductIndexer's field
+            // list self-heals here even if `lunar:meilisearch:setup`
+            // wasn't run manually after that deploy.
+            $this->app->make(Schedule::class)
+                ->command('lunar:search:index', ['Lunar\\Models\\Product', '--refresh'])
+                ->dailyAt('03:00');
+        });
     }
 }