BOOK: adjust deletion of booking objects. (#21705)

If a booking object is deleted all reservations and calendar entries
related to the booking object will be deleted too. Those steps were
missing before, therefore the entry was still visible in the calendar.

Mantis Ticket: https://mantis.ilias.de/view.php?id=21705

Modules/BookingManager/Objects/class.ilBookingObject.php

@@ -410,6 +410,17 @@ public function delete(): int
         return 0;
     }
 
+    public function deleteReservationAndCalEntry(int $object_id): void
+    {
+        $reservation_db = new ilBookingReservationDBRepository($this->db);
+        $reservation_id = $reservation_db->getReservationIdByBookingObjectId($object_id);
+        $reservation = new ilBookingReservation($reservation_id);
+        $entry = new ilCalendarEntry($reservation->getCalendarEntry());
+
+        $reservation_db->delete($reservation_id);
+        $entry->delete();
+    }
+
     /**
      * Get nr of available items for a set of object ids
      * @param int[] $a_obj_ids

Modules/BookingManager/Objects/class.ilBookingObjectGUI.php

@@ -536,6 +536,7 @@ public function delete(): void
         $lng = $this->lng;
 
         $obj = new ilBookingObject($this->object_id);
+        $obj->deleteReservationAndCalEntry($this->object_id);
         $obj->delete();
 
         $this->tpl->setOnScreenMessage('success', $lng->txt('book_object_deleted'), true);

Modules/BookingManager/Reservations/class.ilBookingReservationDBRepository.php

@@ -328,4 +328,14 @@ public function getCachedContextObjBookingInfo(
             return ($row["context_obj_id"] == $context_obj_id);
         });
     }
+
+    public function getReservationIdByBookingObjectId(int $booking_object_id): int
+    {
+        $query = "SELECT booking_reservation_id FROM booking_reservation " . PHP_EOL
+            . " WHERE object_id = " . $this->db->quote($booking_object_id, "integer");
+        $res = $this->db->query($query);
+        $ret = $this->db->fetchAssoc($res);
+
+        return (int) $ret['booking_reservation_id'];
+    }
 }