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Clean Architecture, DDD et CQRS example with Laravel

The application will provide a Rest JSON API allowing a user to book lessons for an instructor on defined schedules, these will be created by the instructor.

A lesson is available if it does not have a confirmed or pending reservation.

A lesson will have a price.

The validation of the reservation by the instructor of a lesson will result in the debit of the user's wallet.

The user will be able to fill his wallet in euros only.

(It would have been better to make a sequence diagram by use case and to do a real event storming)

Application can create a user to be a teacher

Application can create a user to be a learner

Teacher create a lesson with a start date and hour and price

Learner add euros on his wallet

Learner see lessons available

Learner book a lesson available if wallet is sufficient

Teacher validate a booking

Transfert money to debit wallet of learner and credit wallet of techer and close it lesson

Learner (Bounded Context) :

User (Domain)

• Use case 2

Booking (Domain)

• Use Case 5
• Use Case 6

Teacher (Bounded Context) :

User (Domain)

• Use case 1

Lesson (Domain)

• Use Case 3
• Use Case 7

Bank (Bounded Context) :

Wallet (Domain)

• Use Case 4
• Use Case 8

CreateLearner : create a learner BookLesson : book a lesson by a learner, booking is pending and payment status is new also, and send event

GetLessonsAvailable : get all lessons available GetBookings : get all booking create by learner

LessonBooked : event to indicate a lesson has been booked

CreateTeacher : create a teacher CreateLesson : create a lesson by a teacher ValidateBooking : validate a booking RefuseBooking : refuse a booking

GetBookingsPending : get all booking of its lessons pending validation and payment state pending

BookingValidated : event to indicate a booking has been validated BookingRefused : event to indicate a booking has been refused

AddMoneyToWallet : add money to a wallet of an user TransfertMoney : transfert money between wallet AuthorizeTransaction : check if has enough money for a user to do a transaction, state new to pending CreateTransaction : create transaction for a wallet with new state and price

TransactionAuthorized : event to indicate that a transaction is authorized

LessonBookedConsumer : listen if a booking has been asked, create Transaction and authorize transaction BookingValidatedConsumer : listen if a booking has been validated and transfert money between learner wallet and teacher wallet BookingRefusedConsumer : listen if a booking has been refused and cancel transaction