cron low stock - overdue invoice

app/cron/alert_low_stock.php

@@ -0,0 +1,26 @@
+<?php
+/**
+ * alert_low_stock.php — Called by Node.js scheduler daily at 8am.
+ * Returns companies that have one or more SKUs below their min_stock threshold.
+ * Response: { success: 1, alerts: [{ company_id, count }] }
+ */
+require __DIR__ . '/../assets/utils/cron_auth.php';
+
+$sth = $pdo1->query(
+    "SELECT e.company_id, COUNT(*) AS count
+     FROM etl_stock_summary e
+     JOIN md_product p
+       ON p.product_sku = e.product_sku
+      AND p.company_id  = e.company_id
+      AND p.status      = 1
+     WHERE e.company_id > 0
+       AND p.min_stock  > 0
+       AND (e.total_in - e.total_out) < p.min_stock
+     GROUP BY e.company_id
+     HAVING count > 0"
+);
+
+$answer['success'] = 1;
+$answer['alerts']  = $sth->fetchAll(PDO::FETCH_ASSOC);
+
+exit(json_encode($answer));