편지 검증 flow

sequenceDiagram
 participant User
 participant VerifyLetterAccessibleUsecase
 participant LetterCommandService
 participant SendLetterManagementPort
 participant UserManagementPort
 participant LetterException
 User ->> VerifyLetterAccessibleUsecase: verify(command)
 VerifyLetterAccessibleUsecase ->> LetterCommandService: verify(command)
 Note right of LetterCommandService: 편지가 이전에 검증되었는지 확인
 LetterCommandService ->> SendLetterManagementPort: verifiedLetter(DomainId(command.userId), command.letterCode)
 alt 동일한 사용자가 열람한적이 있음
 LetterCommandService ->> SendLetterManagementPort: getExpiredLetterNotNull(DomainId(command.userId), command.letterCode)
 SendLetterManagementPort -->> LetterCommandService: sendLetter
 LetterCommandService ->> VerifyLetterAccessibleUsecase: VerifyLetterAccessibleUsecase.Response(letterId = sendLetter.id.value)
 else 이전에 열람한 적 없음
 LetterCommandService ->> SendLetterManagementPort: getLetterByCodeNotNull(command.letterCode)
 SendLetterManagementPort -->> LetterCommandService: sendLetter
 LetterCommandService ->> UserManagementPort: getUserNotNull(DomainId(command.userId))
 UserManagementPort -->> LetterCommandService: user
 LetterCommandService ->> sendLetter: isSameReceiver { user.username }
 alt 수신자 이름과 동일함
 LetterCommandService ->> SendLetterManagementPort: expireLetter(DomainId(command.userId), sendLetter.id)
 SendLetterManagementPort -->> LetterCommandService: expired
 LetterCommandService ->> VerifyLetterAccessibleUsecase: VerifyLetterAccessibleUsecase.Response(letterId = sendLetter.id.value)
 else 수신자 이름과 동일하지 않음
 LetterCommandService ->> LetterException: throw InvalidLetterAccessException()
 end
 end