Case: Design a review system with moderation, where the author sees their review during moderation, but other users do not.

For a review system with moderation, where the author sees their review immediately, and other users only after approval, the following architecture can be designed:

1. Data Model:

• Review contains fields: id, text, author_id, status (e.g., "under moderation", "approved", "rejected"), creation date.

2. Display Logic:

• The author sees all their reviews, including those with the status "under moderation".
• Other users see only reviews with the status "approved".

3. Moderation Process:

• After creation, the review receives the status "under moderation".
• The moderator checks the review and changes the status to "approved" or "rejected".

4. Interface:

• The author is shown a separate section with their reviews and their statuses.
• The general list of reviews is filtered by the "approved" status.

5. Security:

• Access rights should be checked when requesting reviews to prevent unauthorized users from seeing reviews under moderation.

This approach ensures transparency for the author and quality control for other users.