[FEAT] 주문 통계(일별 매출/인기상품 TOP10/시간대별 주문수) 기능 구현

src/main/java/app/dearobjet/backend/domain/order/OrderController.java

@@ -8,6 +8,8 @@
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
 import org.springframework.web.bind.annotation.*;
 
+import java.time.LocalDate;
+
 @RestController
 @RequiredArgsConstructor
 @RequestMapping("/api/v1")
@@ -79,4 +81,13 @@ public ApiResponse<Void> confirmPurchase(
         orderService.confirmPurchase(userDetails.getUserId(), orderId);
         return ApiResponse.of(null);
     }
+
+    @GetMapping("/orders/stats")
+    public ApiResponse<OrderStatsResponse> getOrderStats(
+            @AuthenticationPrincipal CustomUserDetails userDetails,
+            @RequestParam LocalDate from,
+            @RequestParam LocalDate to
+    ) {
+        return ApiResponse.of(orderService.getOrderStats(userDetails.getUserId(), from, to));
+    }
 }

src/main/java/app/dearobjet/backend/domain/order/OrderRepository.java

@@ -5,8 +5,72 @@
 import app.dearobjet.backend.domain.user.entity.User;
 import org.springframework.data.domain.*;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+
+import java.time.LocalDateTime;
+import java.util.List;
 
 public interface OrderRepository extends JpaRepository<Order, Long> {
+
     Page<Order> findByUser(User user, Pageable pageable);
     Page<Order> findByUserAndStatus(User user, OrderStatus status, Pageable pageable);
-}
+
+    // 1) 일별 매출
+    @Query(value = """
+    SELECT DATE(o.paid_at) AS d,
+           COUNT(*) AS cnt,
+           COALESCE(SUM(o.total_amount), 0) AS amt
+    FROM orders o
+    WHERE o.user_id = :userId
+      AND o.paid_at IS NOT NULL
+      AND o.paid_at BETWEEN :fromDt AND :toDt
+      AND o.status IN ('PAID', 'SHIPPING', 'DELIVERED', 'COMPLETED')
+    GROUP BY DATE(o.paid_at)
+    ORDER BY d ASC
+    """, nativeQuery = true)
+    List<Object[]> findSalesDaily(
+            @Param("userId") Long userId,
+            @Param("fromDt") LocalDateTime fromDt,
+            @Param("toDt") LocalDateTime toDt
+    );
+
+    // 2) 인기 상품 Top 10
+    @Query(value = """
+    SELECT oi.item_id AS itemId,
+           COALESCE(SUM(oi.quantity), 0) AS qty,
+           COALESCE(SUM(oi.line_amount), 0) AS sales
+    FROM orders o
+    JOIN order_item oi ON oi.orders_id = o.orders_id
+    WHERE o.user_id = :userId
+      AND o.paid_at IS NOT NULL
+      AND o.paid_at BETWEEN :fromDt AND :toDt
+      AND o.status IN ('PAID', 'SHIPPING', 'DELIVERED', 'COMPLETED')
+    GROUP BY oi.item_id
+    ORDER BY sales DESC
+    LIMIT 10
+    """, nativeQuery = true)
+    List<Object[]> findPopularItemsTop10(
+            @Param("userId") Long userId,
+            @Param("fromDt") LocalDateTime fromDt,
+            @Param("toDt") LocalDateTime toDt
+    );
+
+    // 3) 시간대별 주문수
+    @Query(value = """
+    SELECT CAST(EXTRACT(HOUR FROM o.paid_at) AS INT) AS h,
+           COUNT(*) AS cnt
+    FROM orders o
+    WHERE o.user_id = :userId
+      AND o.paid_at IS NOT NULL
+      AND o.paid_at BETWEEN :fromDt AND :toDt
+      AND o.status IN ('PAID', 'SHIPPING', 'DELIVERED', 'COMPLETED')
+    GROUP BY CAST(EXTRACT(HOUR FROM o.paid_at) AS INT)
+    ORDER BY h ASC
+    """, nativeQuery = true)
+    List<Object[]> findOrdersByHour(
+            @Param("userId") Long userId,
+            @Param("fromDt") LocalDateTime fromDt,
+            @Param("toDt") LocalDateTime toDt
+    );
+}

src/main/java/app/dearobjet/backend/domain/order/OrderService.java

@@ -12,6 +12,8 @@
 import org.springframework.transaction.annotation.Transactional;
 
 import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.LocalTime;
 import java.time.format.DateTimeFormatter;
 import java.util.ArrayList;
 import java.util.List;
@@ -131,6 +133,44 @@ public void confirmPurchase(Long userId, Long orderId) {
         order.updateStatus(OrderStatus.COMPLETED);
     }
 
+    @Transactional(readOnly = true)
+    public OrderStatsResponse getOrderStats(Long userId, LocalDate from, LocalDate to) {
+
+        LocalDateTime fromDt = from.atStartOfDay();
+        LocalDateTime toDt = LocalDateTime.of(to, LocalTime.of(23, 59, 59));
+
+        // 1) 일별 매출
+        List<Object[]> salesRows = orderRepository.findSalesDaily(userId, fromDt, toDt);
+        List<OrderStatsResponse.SalesPoint> sales = new ArrayList<>();
+        for (Object[] row : salesRows) {
+            String date = String.valueOf(row[0]);
+            long cnt = ((Number) row[1]).longValue();
+            long amt = ((Number) row[2]).longValue();
+            sales.add(new OrderStatsResponse.SalesPoint(date, cnt, amt));
+        }
+
+        // 2) 인기 상품 Top 10
+        List<Object[]> popularRows = orderRepository.findPopularItemsTop10(userId, fromDt, toDt);
+        List<OrderStatsResponse.PopularItemPoint> popularItems = new ArrayList<>();
+        for (Object[] row : popularRows) {
+            Long itemId = ((Number) row[0]).longValue();
+            long qty = ((Number) row[1]).longValue();
+            long salesAmt = ((Number) row[2]).longValue();
+            popularItems.add(new OrderStatsResponse.PopularItemPoint(itemId, qty, salesAmt));
+        }
+
+        // 3) 시간대별 주문수
+        List<Object[]> hourRows = orderRepository.findOrdersByHour(userId, fromDt, toDt);
+        List<OrderStatsResponse.OrdersByHourPoint> ordersByHour = new ArrayList<>();
+        for (Object[] row : hourRows) {
+            int hour = ((Number) row[0]).intValue();
+            long cnt = ((Number) row[1]).longValue();
+            ordersByHour.add(new OrderStatsResponse.OrdersByHourPoint(hour, cnt));
+        }
+
+        return new OrderStatsResponse(sales, popularItems, ordersByHour);
+    }
+
     private void validateOwner(Order order, Long userId) {
         // 토큰 유저가 이 주문의 주인인지
         if (order.getUser() == null || !order.getUser().getId().equals(userId)) {

src/main/java/app/dearobjet/backend/domain/order/dto/OrderStatsResponse.java

@@ -0,0 +1,38 @@
+package app.dearobjet.backend.domain.order.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+import java.util.List;
+
+@Getter
+@AllArgsConstructor
+public class OrderStatsResponse {
+
+    private List<SalesPoint> sales;
+    private List<PopularItemPoint> popularItems;
+    private List<OrdersByHourPoint> ordersByHour;
+
+    @Getter
+    @AllArgsConstructor
+    public static class SalesPoint {
+        private String date;
+        private long orderCount;
+        private long amount;
+    }
+
+    @Getter
+    @AllArgsConstructor
+    public static class PopularItemPoint {
+        private Long itemId;
+        private long quantity;
+        private long salesAmount;
+    }
+
+    @Getter
+    @AllArgsConstructor
+    public static class OrdersByHourPoint {
+        private int hour;
+        private long orderCount;
+    }
+}