add outer/inner sequence

design/backend/sequence/inner/event-콘텐츠선택.puml

@@ -0,0 +1,53 @@
+@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: SELECT * FROM event_drafts\nWHERE id = ? AND user_id = ?
+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: UPDATE event_drafts SET\nselected_image_url = ?,\nedited_title = ?,\nedited_text = ?,\nbackground_color = ?,\ntext_color = ?,\nupdated_at = NOW()\nWHERE id = ?
+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