feat: 월 별 통계 기능 추가 #79

src/main/java/mustodo/backend/todo/domain/TodoRepository.java

@@ -2,6 +2,8 @@
 
 import mustodo.backend.sns.application.dto.FeedTodoQueryDto;
 import mustodo.backend.user.domain.User;
+import mustodo.backend.user.ui.dto.StatsMonthDto;
+import mustodo.backend.user.ui.dto.StatsResponse;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.stereotype.Repository;
@@ -27,4 +29,8 @@ public interface TodoRepository extends JpaRepository<Todo, Long> {
 
     @Query("select todo from Todo todo where todo.user=:user and :monthStart <= todo.date and todo.date <= :monthEnd")
     List<Todo> findTodoByMonth(User user, LocalDate monthStart, LocalDate monthEnd);
+
+    @Query("select todo.date as date, sum(case when todo.achieve = true then 1 else 0 end) as achieveCount, count(todo) as totalTodo from Todo todo " +
+            "where todo.user=:user and :monthStart <= todo.date and todo.date <= :monthEnd group by todo.date")
+    List<StatsMonthDto> findTodoStatsByMonth(User user, LocalDate monthStart, LocalDate monthEnd);
 }

src/main/java/mustodo/backend/user/application/UserService.java

@@ -3,14 +3,24 @@
 import lombok.RequiredArgsConstructor;
 import mustodo.backend.config.ImageConfig;
 import mustodo.backend.exception.user.UserNotFoundException;
+import mustodo.backend.todo.domain.Todo;
+import mustodo.backend.todo.domain.TodoRepository;
+import mustodo.backend.todo.ui.dto.TodoMonthResponse;
 import mustodo.backend.user.domain.User;
 import mustodo.backend.user.domain.UserRepository;
 import mustodo.backend.user.ui.dto.MeResponse;
+import mustodo.backend.user.ui.dto.StatsMonthDto;
+import mustodo.backend.user.ui.dto.StatsResponse;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.web.multipart.MultipartFile;
 
 import javax.persistence.EntityManager;
+import java.time.LocalDate;
+import java.time.YearMonth;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 @Service
 @RequiredArgsConstructor
@@ -19,6 +29,7 @@ public class UserService {
     private final ImageConfig imageConfig;
     private final EntityManager entityManager;
     private final UserRepository userRepository;
+    private final TodoRepository todoRepository;
 
     @Transactional
     public void updateProfileImage(User user, MultipartFile multipartFile) {
@@ -31,4 +42,11 @@ public MeResponse getMe(User user) {
         return userRepository.findFollowCountByUser(user)
                 .orElseThrow(() -> new UserNotFoundException(user.getEmail()));
     }
+
+    @Transactional(readOnly = true)
+    public StatsResponse findTodoStats(User user, String date) {
+        YearMonth month = YearMonth.parse(date);
+        List<StatsMonthDto> todoByMonth = todoRepository.findTodoStatsByMonth(user, month.atDay(1), month.atEndOfMonth());
+        return new StatsResponse(todoByMonth);
+    }
 }

src/main/java/mustodo/backend/user/ui/UserController.java

@@ -5,8 +5,10 @@
 import mustodo.backend.user.application.UserService;
 import mustodo.backend.user.domain.User;
 import mustodo.backend.user.ui.dto.MeResponse;
+import mustodo.backend.user.ui.dto.StatsResponse;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
@@ -29,4 +31,9 @@ public void updateProfileImage(@Login User user, @RequestBody MultipartFile imag
     public ResponseEntity<MeResponse> getMe(@Login User user) {
         return ResponseEntity.ok(userService.getMe(user));
     }
+
+    @GetMapping("/stats/{date}")
+    public ResponseEntity<StatsResponse> findStats(@Login User user, @PathVariable String date) {
+        return ResponseEntity.ok(userService.findTodoStats(user, date));
+    }
 }

src/main/java/mustodo/backend/user/ui/dto/StatsMonthDto.java

@@ -0,0 +1,9 @@
+package mustodo.backend.user.ui.dto;
+
+import java.time.LocalDate;
+
+public interface StatsMonthDto {
+    LocalDate getDate();
+    int getAchieveCount();
+    int getTotalTodo();
+}

src/main/java/mustodo/backend/user/ui/dto/StatsResponse.java

@@ -0,0 +1,12 @@
+package mustodo.backend.user.ui.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+import java.util.List;
+
+@Getter
+@AllArgsConstructor
+public class StatsResponse {
+    private List<StatsMonthDto> month;
+}