Imagine you're building a smart locker system, like those found in apartment complexes or parcel delivery services. These aren't your old school gym lockers. They need to be flexible, secure, and able to handle different users (residents, delivery drivers, admins), various package sizes, and potential integrations with other building management systems. This problem focuses on the core logic of managing these lockers: allocating them, storing packages, and ensuring only authorized users can access the contents. We need a robust, extensible design that can adapt to future requirements like temperature-controlled lockers or more sophisticated access control mechanisms.

Requirements