@startuml event-콘텐츠선택
!theme mono

title Event Service - 선택한 콘텐츠 저장 (UFR-CONT-020)

participant "EventController" as Controller <<C>>
participant "EventService" as Service <<S>>
participant "EventRepository" as Repo <<R>>
participant "Redis Cache" as Cache <<E>>
database "Event DB" as DB <<E>>

note over Controller: PUT /api/events/drafts/{id}/content
Controller -> Service: updateEventContent(eventDraftId, userId,\nselectedImageUrl, editedContent)
activate Service

Service -> Repo: findById(eventDraftId)
activate Repo
Repo -> DB: 이벤트 초안 조회\n(초안ID와 사용자ID로 조회)
activate DB
DB --> Repo: EventDraft
deactivate DB
Repo --> Service: EventDraft entity
deactivate Repo

Service -> Service: validateOwnership(userId, eventDraft)
Service -> Service: validateImageUrl(selectedImageUrl)
note right: 선택한 이미지 URL\n유효성 검증

Service -> Service: applyContentEdits(eventDraft, editedContent)
note right: 편집 내용 적용:\n- 텍스트 수정\n- 색상 변경

Service -> Repo: update(eventDraft)
activate Repo
Repo -> DB: 이벤트 초안 업데이트\n(선택된 이미지 URL,\n편집된 제목/텍스트,\n배경색/텍스트색,\n수정일시를 업데이트)
activate DB
DB --> Repo: OK
deactivate DB
Repo --> Service: EventDraft entity
deactivate Repo

Service -> Cache: delete("purpose:" + userId)
activate Cache
note right: 캐시 무효화
Cache --> Service: OK
deactivate Cache

Service --> Controller: EventContentResponse\n{eventDraftId, selectedImageUrl,\neditedContent}
deactivate Service
Controller --> Client: 200 OK\n{eventDraftId}

note over Controller, Cache: 콘텐츠 편집 내용:\n- 제목 텍스트\n- 경품 정보 텍스트\n- 참여 안내 텍스트\n- 배경색\n- 텍스트 색상\n- 강조 색상

@enduml