feat: 편지 모아보기 API 구현 (#158)

* v1.0.1: Github Actions 릴리즈 버저닝 자동화 스크립트 추가 및 잘못된 (#143) * chore: Github Actions 릴리즈 버저닝 자동화 스크립트 추가 (#140) * fix: Github Actions 잘못된 Indent 수정 (#142) * feat: 편지 모아보기 API 구현
TeamDilly · Feb 22, 2024 · 14b5b9d · 14b5b9d
1 parent d2efa0e
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diff --git a/packy-api/src/main/java/com/dilly/gift/api/GiftController.java b/packy-api/src/main/java/com/dilly/gift/api/GiftController.java
@@ -1,6 +1,7 @@
 package com.dilly.gift.api;
 
 import com.dilly.gift.application.GiftService;
+import com.dilly.gift.dto.response.LetterResponse;
 import com.dilly.gift.dto.response.PhotoResponseDto.PhotoWithoutSequenceResponse;
 import com.dilly.global.response.DataResponseDto;
 import com.dilly.global.response.SliceResponseDto;
@@ -42,4 +43,22 @@ public DataResponseDto<SliceResponseDto<PhotoWithoutSequenceResponse>> getPhotos
         return DataResponseDto.from(
             SliceResponseDto.from(giftService.getPhotos(lastPhotoId, pageable)));
     }
+
+    @Operation(summary = "편지 모아보기")
+    @Parameter(in = ParameterIn.QUERY,
+        description = "한 페이지에 보여줄 편지 개수. 기본값은 6개",
+        name = "size",
+        schema = @Schema(type = "integer"))
+    @GetMapping("/letters")
+    public DataResponseDto<SliceResponseDto<LetterResponse>> getLetters(
+        @PageableDefault(size = 6)
+        @Parameter(hidden = true)
+        Pageable pageable,
+        @Schema(description = "마지막 편지의 id", type = "integer")
+        @RequestParam(value = "last-letter-id", required = false)
+        Long lastLetterId
+    ) {
+        return DataResponseDto.from(
+            SliceResponseDto.from(giftService.getLetters(lastLetterId, pageable)));
+    }
 }
diff --git a/packy-api/src/main/java/com/dilly/gift/application/GiftService.java b/packy-api/src/main/java/com/dilly/gift/application/GiftService.java
@@ -1,11 +1,14 @@
 package com.dilly.gift.application;
 
 import com.dilly.gift.adaptor.GiftBoxReader;
+import com.dilly.gift.adaptor.LetterReader;
 import com.dilly.gift.adaptor.PhotoReader;
 import com.dilly.gift.adaptor.ReceiverReader;
 import com.dilly.gift.domain.GiftBox;
+import com.dilly.gift.domain.Letter;
 import com.dilly.gift.domain.Photo;
 import com.dilly.gift.domain.Receiver;
+import com.dilly.gift.dto.response.LetterResponse;
 import com.dilly.gift.dto.response.PhotoResponseDto.PhotoWithoutSequenceResponse;
 import com.dilly.global.utils.SecurityUtil;
 import com.dilly.member.adaptor.MemberReader;
@@ -27,8 +30,9 @@
 public class GiftService {
 
     private final MemberReader memberReader;
-    private final PhotoReader photoReader;
     private final GiftBoxReader giftBoxReader;
+    private final PhotoReader photoReader;
+    private final LetterReader letterReader;
     private final ReceiverReader receiverReader;
 
     public Slice<PhotoWithoutSequenceResponse> getPhotos(Long lastPhotoId, Pageable pageable) {
@@ -51,4 +55,25 @@ public Slice<PhotoWithoutSequenceResponse> getPhotos(Long lastPhotoId, Pageable
 
         return new SliceImpl<>(photoResponses, pageable, photoSlice.hasNext());
     }
+
+    public Slice<LetterResponse> getLetters(Long lastLetterId, Pageable pageable) {
+        Long memberId = SecurityUtil.getMemberId();
+        Member member = memberReader.findById(memberId);
+
+        LocalDateTime lastLetterDate = LocalDateTime.now();
+        if (lastLetterId != null) {
+            Letter lastLetter = letterReader.findById(lastLetterId);
+            GiftBox giftBox = giftBoxReader.findByLetter(lastLetter);
+            Receiver lastReceiver = receiverReader.findByMemberAndGiftBox(member, giftBox);
+
+            lastLetterDate = lastReceiver.getCreatedAt();
+        }
+        Slice<Letter> letterSlice = letterReader.searchBySlice(member, lastLetterDate, pageable);
+
+        List<LetterResponse> letterResponses = letterSlice.stream()
+            .map(LetterResponse::from)
+            .toList();
+
+        return new SliceImpl<>(letterResponses, pageable, letterSlice.hasNext());
+    }
 }
diff --git a/packy-api/src/main/java/com/dilly/gift/dto/response/LetterResponse.java b/packy-api/src/main/java/com/dilly/gift/dto/response/LetterResponse.java
@@ -0,0 +1,23 @@
+package com.dilly.gift.dto.response;
+
+import com.dilly.gift.domain.Letter;
+import io.swagger.v3.oas.annotations.media.Schema;
+import lombok.Builder;
+
+@Builder
+public record LetterResponse(
+    @Schema(example = "1")
+    Long id,
+    @Schema(example = "이 편지는 영국에서 시작되어...")
+    String letterContent,
+    EnvelopeResponse envelope
+) {
+
+    public static LetterResponse from(Letter letter) {
+        return LetterResponse.builder()
+            .id(letter.getId())
+            .letterContent(letter.getContent())
+            .envelope(EnvelopeResponse.of(letter.getEnvelope()))
+            .build();
+    }
+}
diff --git a/packy-common/src/main/java/com/dilly/exception/ErrorCode.java b/packy-common/src/main/java/com/dilly/exception/ErrorCode.java
@@ -52,6 +52,7 @@ public enum ErrorCode {
     STICKER_NOT_FOUND(HttpStatus.NOT_FOUND, "스티커를 찾을 수 없습니다."),
     GIFTBOX_NOT_FOUND(HttpStatus.NOT_FOUND, "선물박스를 찾을 수 없습니다."),
     PHOTO_NOT_FOUND(HttpStatus.NOT_FOUND, "사진을 찾을 수 없습니다."),
+    LETTER_NOT_FOUND(HttpStatus.NOT_FOUND, "편지를 찾을 수 없습니다."),
 
     // Unsupported
     UNSUPPORTED_LOGIN_TYPE(HttpStatus.BAD_REQUEST, "지원하지 않는 로그인 타입입니다."),

diff --git a/packy-domain/src/main/java/com/dilly/gift/adaptor/GiftBoxReader.java b/packy-domain/src/main/java/com/dilly/gift/adaptor/GiftBoxReader.java
@@ -5,6 +5,7 @@
 import com.dilly.gift.dao.GiftBoxRepository;
 import com.dilly.gift.dao.querydsl.GiftBoxQueryRepository;
 import com.dilly.gift.domain.GiftBox;
+import com.dilly.gift.domain.Letter;
 import com.dilly.member.domain.Member;
 import java.time.LocalDateTime;
 import java.util.Comparator;
@@ -25,6 +26,10 @@ public GiftBox findById(Long giftBoxId) {
             .orElseThrow(() -> new EntityNotFoundException(ErrorCode.GIFTBOX_NOT_FOUND));
     }
 
+    public GiftBox findByLetter(Letter letter) {
+        return giftBoxRepository.findByLetter(letter);
+    }
+
     public Slice<GiftBox> searchSentGiftBoxesBySlice(Member member, LocalDateTime lastGiftBoxDate,
         Pageable pageable) {
         return giftBoxQueryRepository.searchSentGiftBoxesBySlice(member, lastGiftBoxDate, pageable);

diff --git a/packy-domain/src/main/java/com/dilly/gift/adaptor/LetterReader.java b/packy-domain/src/main/java/com/dilly/gift/adaptor/LetterReader.java
@@ -0,0 +1,30 @@
+package com.dilly.gift.adaptor;
+
+import com.dilly.exception.ErrorCode;
+import com.dilly.exception.entitynotfound.EntityNotFoundException;
+import com.dilly.gift.dao.LetterRepository;
+import com.dilly.gift.dao.querydsl.LetterQueryRepository;
+import com.dilly.gift.domain.Letter;
+import com.dilly.member.domain.Member;
+import java.time.LocalDateTime;
+import lombok.RequiredArgsConstructor;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.domain.Slice;
+import org.springframework.stereotype.Component;
+
+@Component
+@RequiredArgsConstructor
+public class LetterReader {
+
+    private final LetterRepository letterRepository;
+    private final LetterQueryRepository letterQueryRepository;
+
+    public Letter findById(Long id) {
+        return letterRepository.findById(id)
+            .orElseThrow(() -> new EntityNotFoundException(ErrorCode.LETTER_NOT_FOUND));
+    }
+
+    public Slice<Letter> searchBySlice(Member member, LocalDateTime lastLetterDate, Pageable pageable) {
+        return letterQueryRepository.searchBySlice(member, lastLetterDate, pageable);
+    }
+}
diff --git a/packy-domain/src/main/java/com/dilly/gift/dao/GiftBoxRepository.java b/packy-domain/src/main/java/com/dilly/gift/dao/GiftBoxRepository.java
@@ -1,9 +1,12 @@
 package com.dilly.gift.dao;
 
 import com.dilly.gift.domain.GiftBox;
+import com.dilly.gift.domain.Letter;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface GiftBoxRepository extends JpaRepository<GiftBox, Long> {
 
 	GiftBox findTopByOrderByIdDesc();
+
+    GiftBox findByLetter(Letter letter);
 }
diff --git a/packy-domain/src/main/java/com/dilly/gift/dao/querydsl/LetterQueryRepository.java b/packy-domain/src/main/java/com/dilly/gift/dao/querydsl/LetterQueryRepository.java
@@ -0,0 +1,59 @@
+package com.dilly.gift.dao.querydsl;
+
+import static com.dilly.gift.domain.QGiftBox.giftBox;
+import static com.dilly.gift.domain.QLetter.letter;
+import static com.dilly.gift.domain.QReceiver.receiver;
+
+import com.dilly.gift.domain.Letter;
+import com.dilly.member.domain.Member;
+import com.querydsl.core.types.dsl.BooleanExpression;
+import com.querydsl.jpa.impl.JPAQueryFactory;
+import java.time.LocalDateTime;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.domain.Slice;
+import org.springframework.data.domain.SliceImpl;
+import org.springframework.stereotype.Repository;
+
+@Repository
+@RequiredArgsConstructor
+public class LetterQueryRepository {
+
+    private final JPAQueryFactory jpaQueryFactory;
+
+    public Slice<Letter> searchBySlice(Member member, LocalDateTime lastLetterDate, Pageable pageable) {
+        List<Letter> results = jpaQueryFactory.select(letter)
+            .from(receiver)
+            .join(receiver.giftBox, giftBox)
+            .join(giftBox.letter, letter)
+            .where(
+                ltLetterDate(lastLetterDate),
+                receiver.member.eq(member)
+            )
+            .orderBy(receiver.createdAt.desc())
+            .limit(pageable.getPageSize() + 1L)
+            .fetch();
+
+        return checkLastPage(pageable, results);
+    }
+
+    private BooleanExpression ltLetterDate(LocalDateTime lastLetterDate) {
+        if (lastLetterDate == null) {
+            return null;
+        }
+
+        return receiver.createdAt.lt(lastLetterDate);
+    }
+
+    private Slice<Letter> checkLastPage(Pageable pageable, List<Letter> results) {
+        boolean hasNext = false;
+
+        if (results.size() > pageable.getPageSize()) {
+            results.remove(results.size() - 1);
+            hasNext = true;
+        }
+
+        return new SliceImpl<>(results, pageable, hasNext);
+    }
+}