update

autoload/factory/class.Products.php

@@ -21,6 +21,38 @@ class Products
     return true;
   }
 
+  /**
+   * Bezpieczne wstawienie/odczyt produktu po (client_id, offer_id).
+   * Wymaga UNIQUE KEY uk_products_client_offer (zob. migracja 031).
+   * Zwraca product_id istniejacego lub nowo wstawionego wiersza.
+   * Odporne na race condition: przy bledzie 1062 (Duplicate entry) robi SELECT.
+   */
+  static public function ensure_product( $client_id, $offer_id, array $insert_data = [] )
+  {
+    global $mdb;
+
+    $client_id = (int) $client_id;
+    $offer_id  = trim( (string) $offer_id );
+    if ( $client_id <= 0 || $offer_id === '' ) return 0;
+
+    $existing_id = (int) $mdb -> get( 'products', 'id', [ 'AND' => [ 'client_id' => $client_id, 'offer_id' => $offer_id ] ] );
+    if ( $existing_id > 0 ) return $existing_id;
+
+    $row = array_merge( $insert_data, [ 'client_id' => $client_id, 'offer_id' => $offer_id ] );
+    try
+    {
+      $mdb -> insert( 'products', $row );
+      $new_id = (int) $mdb -> id();
+      if ( $new_id > 0 ) return $new_id;
+    }
+    catch ( \PDOException $e )
+    {
+      if ( strpos( (string) $e -> getMessage(), '1062' ) === false ) throw $e;
+    }
+
+    return (int) $mdb -> get( 'products', 'id', [ 'AND' => [ 'client_id' => $client_id, 'offer_id' => $offer_id ] ] );
+  }
+
   static public function delete_products( $product_ids ) {
     global $mdb;
     if ( empty( $product_ids ) || !is_array( $product_ids ) ) {