feat: add caching to ajax calendar requests

public/typo3conf/ext/ep_products/Classes/Controller/AjaxCalendarController.php

@@ -30,21 +30,31 @@ namespace EP\EpProducts\Controller;
 use EP\EpProducts\BpnConnect\ApiClient;
 use EP\EpProducts\Domain\Model\Hotel;
 use EP\EpProducts\Utility\DateUtility;
+use TYPO3\CMS\Core\Cache\Frontend\FrontendInterface;
 use TYPO3\CMS\Extbase\Mvc\Controller\ActionController;
 
 class AjaxCalendarController extends ActionController
 {
+    private const CACHE_TTL = 3600;
+
     /**
      * @var ApiClient
      */
     protected $apiClient;
 
     /**
-     * @param ApiClient $apiClient
+     * @var FrontendInterface
      */
-    public function __construct(ApiClient $apiClient)
+    protected $cache;
+
+    /**
+     * @param ApiClient $apiClient
+     * @param FrontendInterface $cache
+     */
+    public function __construct(ApiClient $apiClient, FrontendInterface $cache)
     {
         $this->apiClient = $apiClient;
+        $this->cache = $cache;
     }
 
     /**
@@ -70,11 +80,19 @@ class AjaxCalendarController extends ActionController
             $calendar['error'] = true;
         } else {
             try {
-                $calendar = $this->apiClient->getCalendar(
-                    $hotelCode,
-                    new \DateTimeImmutable($apiDateFrom),
-                    new \DateTimeImmutable($apiDateTo)
-                );
+                $cacheIdentifier = $this->getCacheIdentifier($hotelCode, $apiDateFrom, $apiDateTo);
+                $cachedCalendar = $this->cache->get($cacheIdentifier);
+
+                if (false !== $cachedCalendar) {
+                    $calendar = $cachedCalendar;
+                } else {
+                    $calendar = $this->apiClient->getCalendar(
+                        $hotelCode,
+                        new \DateTimeImmutable($apiDateFrom),
+                        new \DateTimeImmutable($apiDateTo)
+                    );
+                    $this->cache->set($cacheIdentifier, $calendar, [], self::CACHE_TTL);
+                }
             } catch (\Throwable $e) {
                 $calendar['error'] = true;
             }
@@ -140,4 +158,13 @@ class AjaxCalendarController extends ActionController
         ];
     }
 
+    private function getCacheIdentifier(string $hotelCode, string $dateFrom, string $dateTo): string
+    {
+        return 'bpn_connect_calendar_' . sha1(implode('|', [
+            $hotelCode,
+            $dateFrom,
+            $dateTo,
+        ]));
+    }
+
 }

public/typo3conf/ext/ep_products/Configuration/Services.yaml

@@ -27,3 +27,7 @@ services:
   EP\EpProducts\Service\ProductImageService:
     arguments:
       $cache: '@cache.ep_cache'
+
+  EP\EpProducts\Controller\AjaxCalendarController:
+    arguments:
+      $cache: '@cache.ep_cache'