Smart shopping: cron ogni 5min pre-calcola cache server-side, API serve da cache (risposta istantanea)

2026-04-01 05:52:17 +00:00
parent 200ec145d9
commit e18fb5839a
3 changed files with 150 additions and 22 deletions
@@ -0,0 +1,46 @@
+<?php
+/**
+ * Cron: pre-compute smart shopping list and save to cache.
+ * Install with:  crontab -e
+ *   *\/5 * * * * php /var/www/html/dispensa/api/cron_smart_shopping.php >> /var/www/html/dispensa/data/cron.log 2>&1
+ */
+
+// Only allow CLI execution — block HTTP access
+if (PHP_SAPI !== 'cli') {
+    http_response_code(403);
+    exit('Forbidden');
+}
+
+// Define CRON_MODE before loading index.php so the router is skipped
+define('CRON_MODE', true);
+
+// Load all API functions without running the HTTP router
+require_once __DIR__ . '/index.php';
+
+const CACHE_FILE = __DIR__ . '/../data/smart_shopping_cache.json';
+
+try {
+    $db = getDB();
+
+    // Capture the JSON output of smartShopping()
+    ob_start();
+    smartShopping($db);
+    $json = ob_get_clean();
+
+    $decoded = json_decode($json, true);
+    if (!$decoded || !isset($decoded['success'])) {
+        throw new RuntimeException('Invalid JSON from smartShopping(): ' . substr($json, 0, 200));
+    }
+
+    $decoded['cached_at'] = date('c');
+    $decoded['cached_ts'] = time();
+
+    if (file_put_contents(CACHE_FILE, json_encode($decoded, JSON_UNESCAPED_UNICODE)) === false) {
+        throw new RuntimeException('Cannot write cache file: ' . CACHE_FILE);
+    }
+
+    echo '[' . date('Y-m-d H:i:s') . '] OK — ' . count($decoded['items'] ?? []) . " items cached\n";
+} catch (Throwable $e) {
+    echo '[' . date('Y-m-d H:i:s') . '] ERROR: ' . $e->getMessage() . "\n";
+    exit(1);
+}