Merge pull request #27 from hyundai-fruitfruit/HEENDY-93--admin-coupo…

…n-statistics

[HEENDY-93--admin-coupon-statistics] Admin 쿠폰통계 API

src/main/java/com/hyundai/app/coupon/controller/AdminCouponController.java

@@ -2,6 +2,7 @@
 
 import com.hyundai.app.common.AdventureOfHeendyResponse;
 import com.hyundai.app.coupon.domain.Coupon;
+import com.hyundai.app.coupon.dto.CouponUsageRateDto;
 import com.hyundai.app.coupon.service.CouponService;
 import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiOperation;
@@ -32,4 +33,10 @@ public AdventureOfHeendyResponse<List<Coupon>> findCouponList() {
         int storeId = 1;
         return AdventureOfHeendyResponse.success("쿠폰 목록을 가져왔습니다.", couponService.findCouponList(storeId));
     }
+
+    @ApiOperation("쿠폰 사용률 통계 조회 API")
+    @GetMapping("/statistics")
+    public AdventureOfHeendyResponse<List<CouponUsageRateDto>> findCouponUsageRates() {
+        return AdventureOfHeendyResponse.success("쿠폰 사용률 통계를 가져왔습니다.", couponService.findCouponUsageRates());
+    }
 }

src/main/java/com/hyundai/app/coupon/dto/CouponUsageRateDto.java

@@ -0,0 +1,29 @@
+package com.hyundai.app.coupon.dto;
+
+import com.hyundai.app.coupon.enumType.CouponType;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+/**
+ * @author 최성혁
+ * @since 2024/03/04
+ * 쿠폰사용비율 DTO
+ */
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class CouponUsageRateDto {
+    private CouponType couponType;
+    private int totalIssued;
+    private int totalUsed;
+    private double usageRate;
+
+    public void setUsageRate(double usageRate) {
+        BigDecimal bd = new BigDecimal(usageRate).setScale(2, RoundingMode.HALF_UP);
+        this.usageRate = bd.doubleValue();
+    }
+}

src/main/java/com/hyundai/app/coupon/mapper/CouponMapper.java

@@ -1,6 +1,7 @@
 package com.hyundai.app.coupon.mapper;
 
 import com.hyundai.app.coupon.domain.Coupon;
+import com.hyundai.app.coupon.dto.CouponUsageRateDto;
 import org.apache.ibatis.annotations.Mapper;
 
 import java.util.List;
@@ -17,4 +18,6 @@ public interface CouponMapper {
     Coupon findById(int couponId);
 
     List<Coupon> findMemberCouponList(String memberId);
+
+    List<CouponUsageRateDto> findCouponUsageRates();
 }

src/main/java/com/hyundai/app/coupon/mapper/MemberCouponMapper.java

@@ -1,6 +1,9 @@
 package com.hyundai.app.coupon.mapper;
 
 import com.hyundai.app.coupon.domain.MemberCoupon;
+import com.hyundai.app.coupon.dto.CouponUsageRateDto;
+
+import java.util.List;
 
 /**
  * @author 엄상은
@@ -9,6 +12,6 @@
  */
 public interface MemberCouponMapper {
     void saveMemberCoupon(MemberCoupon memberCoupon);
-
     void useCoupon(MemberCoupon memberCoupon);
+
 }

src/main/java/com/hyundai/app/coupon/service/CouponService.java

@@ -2,6 +2,7 @@
 
 import com.hyundai.app.coupon.domain.Coupon;
 import com.hyundai.app.coupon.domain.MemberCoupon;
+import com.hyundai.app.coupon.dto.CouponUsageRateDto;
 import com.hyundai.app.coupon.enumType.CouponType;
 import com.hyundai.app.coupon.mapper.CouponMapper;
 import com.hyundai.app.coupon.mapper.MemberCouponMapper;
@@ -42,9 +43,15 @@ public List<Coupon> findMemberCouponList(String memberId) {
         return couponList;
     }
 
+    public List<CouponUsageRateDto> findCouponUsageRates() {
+        return couponMapper.findCouponUsageRates();
+    }
+
+
     public Void useCoupon(String memberId, int couponId) {
         MemberCoupon memberCoupon = MemberCoupon.of(memberId, couponId);
         memberCouponMapper.useCoupon(memberCoupon);
         return null;
     }
+
 }

src/main/resources/mapper/CouponMapper.xml

@@ -45,4 +45,19 @@
                       WHERE     member_id = #{memberId}
                       AND       is_used = 0)
     </select>
+
+    <select id="findCouponUsageRates" resultType="com.hyundai.app.coupon.dto.CouponUsageRateDto">
+        SELECT
+            C.COUPON_TYPE as "couponType",
+            COUNT(C.ID) as "totalIssued",
+            SUM(CASE WHEN MC.IS_USED = 1 THEN 1 ELSE 0 END) as "totalUsed",
+            (SUM(CASE WHEN MC.IS_USED = 1 THEN 1 ELSE 0 END) * 1.0 / COUNT(C.ID)) * 100 as "usageRate"
+        FROM
+            COUPON C
+                LEFT JOIN
+            MEMBER_COUPON MC ON C.ID = MC.COUPON_ID
+        GROUP BY
+            C.COUPON_TYPE
+    </select>
+
 </mapper>