[Refactor] 소유권 검증을 엔티티 메서드로 통일

[pooreumjung]

🧾 요약

• 서비스 전반에 흩어진 소유권 체크 패턴을 엔티티 메서드 isOwnedBy()로 통일

🔗 이슈

• close [refactor] 소유권 체크 isOwnedBy() 메서드화 #173

✨ 변경 내용

• Post에 isOwnedBy(Long userId) 메서드 추가 — FreePost, RecordPost 공통 소유권 판단
• Comment에 isOwnedBy(Long userId) 메서드 추가
• FreePostService, RecordPostService, CommentService, FreePostReportService 소유권 체크 블록 교체
• 소유권 검증 delete 단위 테스트 추가 (FreePostService, RecordPostService, CommentService)

✅ 확인

• 빌드 OK
• 테스트 OK

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch refactor/#173-owned-by-method

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[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

본 PR은 서비스 내 여러 곳에서 중복으로 사용되던 소유권 검증 로직을 엔티티 내부 메서드로 캡슐화하여 코드의 응집도를 높이고 유지보수성을 개선하는 것을 목적으로 합니다. 엔티티 수준에서 소유권을 판단하도록 변경함으로써 비즈니스 로직의 일관성을 확보하였습니다.

Highlights

• 엔티티 메서드 통합: Post와 Comment 엔티티에 isOwnedBy(Long userId) 메서드를 추가하여 서비스 전반에 흩어져 있던 소유권 검증 로직을 통일했습니다.
• 서비스 로직 리팩토링: FreePostService, RecordPostService, CommentService, FreePostReportService에서 직접 수행하던 소유권 체크를 엔티티 메서드 호출 방식으로 변경했습니다.
• 테스트 코드 보강: 소유권 검증 로직에 대한 삭제 단위 테스트를 추가하고, RecordPostServiceTest를 신규 작성하여 안정성을 확보했습니다.

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Code Review

본 풀 리퀘스트는 Comment 및 Post 엔티티에 소유권 확인을 위한 isOwnedBy 메서드를 추가하고, 관련 서비스 클래스들에서 기존의 작성자 ID 직접 비교 로직을 해당 메서드 호출로 대체하여 객체지향적인 캡슐화를 강화하였습니다. 또한, 이에 맞춰 CommentServiceTest, FreePostServiceTest에 테스트 케이스를 추가하고 RecordPostServiceTest를 신규 작성하여 비즈니스 로직의 검증을 보완하였습니다. 변경 사항이 깔끔하게 반영되었으며, 제공할 추가 피드백은 없습니다.

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