Build an Event Booking API

Problem/Feature Description

A community center needs a REST API to manage event scheduling and ticket booking. Build it using Spring Boot and Java.

Resources:

• Event: { id, title, description, date, location, capacity, ticketPrice, status }
• Booking: { id, eventId, attendeeName, attendeeEmail, numberOfTickets, totalPrice, bookingDate, confirmationCode }

Endpoints:

• GET /api/events -- list events, support filtering by date range (from/to query params) and status
• GET /api/events/{id} -- get event details including remaining capacity
• POST /api/events -- create an event (title required, date must be in the future, capacity >= 1, ticketPrice >= 0)
• PUT /api/events/{id} -- update event details (cannot change capacity below current bookings)
• DELETE /api/events/{id} -- cancel an event (only if status is "draft"; refund logic out of scope)
• POST /api/events/{id}/bookings -- book tickets for an event:
  • attendeeName and attendeeEmail required
  • numberOfTickets must be between 1 and 10
  • event must be in "published" status
  • event must have sufficient remaining capacity
  • generate a unique confirmation code
  • calculate total price
• GET /api/bookings/{confirmationCode} -- look up a booking by confirmation code
• DELETE /api/bookings/{confirmationCode} -- cancel a booking (release capacity back to event)

Business rules:

• Event dates must be in the future when created
• Same email cannot book the same event more than once
• Event status transitions: draft -> published -> completed (or draft -> cancelled)
• Cannot book tickets for a completed or cancelled event

Use in-memory storage or H2 embedded database.

Output Specification

Produce a complete Spring Boot project:

• src/main/java/com/example/ -- controller, service, model, and repository packages
• pom.xml or build.gradle -- with dependencies
• src/main/resources/application.properties -- configuration

You may create additional files as needed for a well-structured codebase.