feat: 물품 주문자들의 성별 및 나이대별 평균 별점 구현

src/main/java/com/gugucon/shopping/auth/config/SecurityConfig.java

@@ -38,7 +38,8 @@ public SecurityFilterChain filterChain(final HttpSecurity http) throws Exception
                 .requestMatchers(new AntPathRequestMatcher("/api/v1/login"),
                                  new AntPathRequestMatcher("/api/v1/signup"),
                                  new AntPathRequestMatcher("/api/v1/products/**"),
-                                 new AntPathRequestMatcher("/api/v1/rate/product/**"))
+                                 new AntPathRequestMatcher("/api/v1/rate/product/*"),
+                                 new AntPathRequestMatcher("/api/v1/rate/product/*/all"))
                 .permitAll()
                 .anyRequest().authenticated()
             )

src/main/java/com/gugucon/shopping/rate/controller/api/RateController.java

@@ -2,6 +2,7 @@
 
 import com.gugucon.shopping.auth.dto.MemberPrincipal;
 import com.gugucon.shopping.rate.dto.request.RateCreateRequest;
+import com.gugucon.shopping.rate.dto.response.GroupRateResponse;
 import com.gugucon.shopping.rate.dto.response.RateDetailResponse;
 import com.gugucon.shopping.rate.dto.response.RateResponse;
 import com.gugucon.shopping.rate.service.RateService;
@@ -11,6 +12,8 @@
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
 import org.springframework.web.bind.annotation.*;
 
+import java.util.List;
+
 @RestController
 @RequestMapping("/api/v1/rate")
 @RequiredArgsConstructor
@@ -44,4 +47,10 @@ public RateResponse getCustomRate(@PathVariable final Long productId,
                                       @AuthenticationPrincipal final MemberPrincipal principal) {
         return rateService.getCustomRate(productId, principal);
     }
+
+    @GetMapping("/product/{productId}/all")
+    @ResponseStatus(HttpStatus.OK)
+    public List<GroupRateResponse> getGroupRates(@PathVariable final Long productId) {
+        return rateService.getGroupRates(productId);
+    }
 }

src/main/java/com/gugucon/shopping/rate/dto/response/GroupRateResponse.java

@@ -0,0 +1,25 @@
+package com.gugucon.shopping.rate.dto.response;
+
+import com.gugucon.shopping.member.domain.vo.BirthYearRange;
+import com.gugucon.shopping.member.domain.vo.Gender;
+import com.gugucon.shopping.rate.repository.dto.GroupAverageRateDto;
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
+public class GroupRateResponse {
+
+    private Gender gender;
+    private BirthYearRange birthYearRange;
+    private RateResponse rate;
+
+    public static GroupRateResponse of(final GroupAverageRateDto groupAverageRateDto, final double averageRate) {
+        return new GroupRateResponse(groupAverageRateDto.getGender(),
+                                     groupAverageRateDto.getBirthYearRange(),
+                                     new RateResponse(groupAverageRateDto.getCount(), averageRate));
+    }
+}

src/main/java/com/gugucon/shopping/rate/repository/RateRepository.java

@@ -4,11 +4,14 @@
 import com.gugucon.shopping.member.domain.vo.Gender;
 import com.gugucon.shopping.rate.domain.entity.Rate;
 import com.gugucon.shopping.rate.repository.dto.AverageRateDto;
-import java.util.Optional;
+import com.gugucon.shopping.rate.repository.dto.GroupAverageRateDto;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.stereotype.Repository;
 
+import java.util.List;
+import java.util.Optional;
+
 @Repository
 public interface RateRepository extends JpaRepository<Rate, Long> {
 
@@ -34,4 +37,10 @@ public interface RateRepository extends JpaRepository<Rate, Long> {
     AverageRateDto findScoresByMemberGenderAndMemberBirthYear(final Long productId,
                                                               final Gender gender,
                                                               final BirthYearRange birthYearRange);
+
+    @Query("SELECT new com.gugucon.shopping.rate.repository.dto.GroupAverageRateDto" +
+            "(rs.gender, rs.birthYearRange, rs.count, rs.totalScore) " +
+            "FROM RateStat rs " +
+            "WHERE rs.productId = :productId")
+    List<GroupAverageRateDto> findAllGroupsOfMemberGenderAndMemberBirthYear(final Long productId);
 }

src/main/java/com/gugucon/shopping/rate/repository/dto/GroupAverageRateDto.java

@@ -0,0 +1,24 @@
+package com.gugucon.shopping.rate.repository.dto;
+
+import com.gugucon.shopping.member.domain.vo.BirthYearRange;
+import com.gugucon.shopping.member.domain.vo.Gender;
+import lombok.Getter;
+
+@Getter
+public class GroupAverageRateDto {
+
+    private final Gender gender;
+    private final BirthYearRange birthYearRange;
+    private final Long count;
+    private final Long totalScore;
+
+    public GroupAverageRateDto(final Gender gender,
+                               final BirthYearRange birthYearRange,
+                               final Long count,
+                               final Long totalScore) {
+        this.gender = gender;
+        this.birthYearRange = birthYearRange;
+        this.count = count;
+        this.totalScore = totalScore;
+    }
+}

src/main/java/com/gugucon/shopping/rate/service/RateService.java

@@ -11,14 +11,19 @@
 import com.gugucon.shopping.order.repository.OrderItemRepository;
 import com.gugucon.shopping.rate.domain.entity.Rate;
 import com.gugucon.shopping.rate.dto.request.RateCreateRequest;
+import com.gugucon.shopping.rate.dto.response.GroupRateResponse;
 import com.gugucon.shopping.rate.dto.response.RateDetailResponse;
 import com.gugucon.shopping.rate.dto.response.RateResponse;
 import com.gugucon.shopping.rate.repository.RateRepository;
 import com.gugucon.shopping.rate.repository.dto.AverageRateDto;
+import com.gugucon.shopping.rate.repository.dto.GroupAverageRateDto;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+import java.util.Comparator;
+import java.util.List;
+
 @Service
 @Transactional(readOnly = true)
 @RequiredArgsConstructor
@@ -74,10 +79,21 @@ public RateResponse getCustomRate(final Long productId, final MemberPrincipal pr
         return new RateResponse(rates.getCount(), averageRate);
     }
 
+    public List<GroupRateResponse> getGroupRates(final Long productId) {
+        return rateRepository.findAllGroupsOfMemberGenderAndMemberBirthYear(productId).stream()
+                .sorted(Comparator.comparing(o -> o.getBirthYearRange().getStartDate(), Comparator.reverseOrder()))
+                .map(rateDto -> GroupRateResponse.of(rateDto, calculateAverageOf(rateDto)))
+                .toList();
+    }
+
     private double calculateAverageOf(final AverageRateDto averageRateDto) {
         return roundDownAverage((double) averageRateDto.getTotalScore() / averageRateDto.getCount());
     }
 
+    private double calculateAverageOf(final GroupAverageRateDto averageRateDto) {
+        return roundDownAverage((double) averageRateDto.getTotalScore() / averageRateDto.getCount());
+    }
+
     private double roundDownAverage(final double average) {
         return Math.floor(average * 100) / 100.0;
     }