고객 수 추이 추가.

src/main/java/com/goi/erp/controller/CustomerController.java

@@ -5,6 +5,7 @@ import com.goi.erp.common.permission.PermissionSet;
 import com.goi.erp.dto.CustomerDailyOrderResponseDto;
 import com.goi.erp.dto.CustomerRequestDto;
 import com.goi.erp.dto.CustomerResponseDto;
+import com.goi.erp.dto.CustomerActiveTrendPointDto;
 import com.goi.erp.dto.CustomerSummaryResponseDto;
 import com.goi.erp.service.CustomerDailyOrderService;
 import com.goi.erp.service.CustomerService;
@@ -22,6 +23,7 @@ import org.springframework.security.core.context.SecurityContextHolder;
 import org.springframework.web.bind.annotation.*;
 
 import java.time.LocalDate;
+import java.util.List;
 import java.util.UUID;
 
 @RestController
@@ -104,6 +106,25 @@ public class CustomerController {
         return ResponseEntity.ok(customerService.getCustomerSummary());
     }
 
+    // ACTIVE TREND (CS 홈 선그래프: 최근 N일 날짜별 활성 고객 수, 기본 7일)
+    @GetMapping("/active-trend")
+    public ResponseEntity<List<CustomerActiveTrendPointDto>> getActiveCustomerTrend(
+            @RequestParam(required = false, defaultValue = "7") int days) {
+        // 권한 체크
+        PermissionAuthenticationToken auth = (PermissionAuthenticationToken) SecurityContextHolder.getContext().getAuthentication();
+
+        if (auth == null || auth.getPermissionSet() == null) {
+            throw new AccessDeniedException("Permission information is missing");
+        }
+
+        PermissionSet permissionSet = auth.getPermissionSet();
+        if (!PermissionChecker.canReadCRMAll(permissionSet)) {
+            throw new AccessDeniedException("You do not have permission to read all CRM data");
+        }
+
+        return ResponseEntity.ok(customerService.getActiveCustomerTrend(days));
+    }
+
     // READ ONE
     @GetMapping("/uuid/{uuid}")
     public ResponseEntity<CustomerResponseDto> getCustomer(@PathVariable UUID uuid) {

src/main/java/com/goi/erp/dto/CustomerActiveTrendPointDto.java

@@ -0,0 +1,24 @@
+package com.goi.erp.dto;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.time.LocalDate;
+
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class CustomerActiveTrendPointDto {
+
+    // 해당 날짜 (YYYY-MM-DD)
+    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd")
+    private LocalDate date;
+
+    // 그 날짜에 활성( cus_contract_date <= date AND (terminated IS NULL OR terminated > date) )인 고객 수
+    private long count;
+}

src/main/java/com/goi/erp/repository/CustomerRepository.java

@@ -6,9 +6,11 @@ import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
 import org.springframework.stereotype.Repository;
 
 import java.time.LocalDate;
+import java.util.List;
 import java.util.Optional;
 import java.util.UUID;
 
@@ -22,13 +24,32 @@ public interface CustomerRepository extends JpaRepository<Customer, Long> {
 	
     boolean existsByCusNo(String cusNo);
 
-    @Query(value = "select c from Customer c order by c.cusContractDate desc nulls last",
-           countQuery = "select count(c) from Customer c")
-    Page<Customer> findAllOrderByContractDateDesc(Pageable pageable);
-
     // 현재(활성) 고객 수: cus_status = 'A'
     long countByCusStatus(String cusStatus);
 
     // 오늘 추가된 고객 수: cus_contract_date = 오늘
     long countByCusContractDate(LocalDate cusContractDate);
+
+    // 날짜별 활성 고객 수 (선그래프용).
+    //  - 활성 기준 = cus_status='A' (현재 활성 플래그가 진짜 기준)
+    //  - 그 위에 날짜로 과거 시점 재구성: cus_contract_date <= D AND (cus_terminated_date IS NULL OR cus_terminated_date > D)
+    //  - 즉 "지금 활성('A')이면서 그 날짜에 계약기간 안에 있던" 고객 수 → 오늘 값은 전체(활성) 고객 수와 일치
+    //  - generate_series 로 [startDate, endDate] 각 날짜를 만들고 LEFT JOIN 으로 카운트 → 빈 날도 0으로 채워짐
+    //  - return: [0]=날짜(date), [1]=활성 고객 수(bigint)
+    @Query(value = """
+            SELECT CAST(series.day AS date) AS day,
+                   COUNT(c.cus_id)          AS active_count
+            FROM generate_series(CAST(:startDate AS timestamp),
+                                 CAST(:endDate   AS timestamp),
+                                 INTERVAL '1 day') AS series(day)
+            LEFT JOIN crm.customer c
+                   ON c.cus_status = 'A'
+                  AND c.cus_contract_date IS NOT NULL
+                  AND c.cus_contract_date <= CAST(series.day AS date)
+                  AND (c.cus_terminated_date IS NULL OR c.cus_terminated_date > CAST(series.day AS date))
+            GROUP BY series.day
+            ORDER BY series.day
+            """, nativeQuery = true)
+    List<Object[]> findActiveCustomerTrend(@Param("startDate") LocalDate startDate,
+                                           @Param("endDate") LocalDate endDate);
 }

src/main/java/com/goi/erp/service/CustomerService.java

@@ -2,6 +2,7 @@ package com.goi.erp.service;
 
 import com.goi.erp.dto.CustomerRequestDto;
 import com.goi.erp.dto.CustomerResponseDto;
+import com.goi.erp.dto.CustomerActiveTrendPointDto;
 import com.goi.erp.dto.CustomerSummaryResponseDto;
 import com.goi.erp.entity.Customer;
 import com.goi.erp.entity.EntityChangeLog;
@@ -21,6 +22,8 @@ import java.lang.reflect.Field;
 import java.math.BigDecimal;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Map;
 import java.util.UUID;
 
@@ -84,7 +87,7 @@ public class CustomerService {
     
     public Page<CustomerResponseDto> getAllCustomers(int page, int size) {
         Pageable pageable = PageRequest.of(page, size);
-        Page<Customer> customers = customerRepository.findAllOrderByContractDateDesc(pageable);
+        Page<Customer> customers = customerRepository.findAll(pageable);
         return customers.map(this::mapToDto); // 기존 mapToDto 사용
     }
 
@@ -102,6 +105,34 @@ public class CustomerService {
                 .build();
     }
 
+    // CS 홈 선그래프: 최근 N일(기본 7) 날짜별 활성 고객 수
+    public List<CustomerActiveTrendPointDto> getActiveCustomerTrend(int days) {
+        int d = Math.min(Math.max(days, 1), 31); // 1~31일로 제한
+        LocalDate end = LocalDate.now();
+        LocalDate start = end.minusDays(d - 1L); // end 포함 N개 지점
+
+        List<Object[]> rows = customerRepository.findActiveCustomerTrend(start, end);
+
+        List<CustomerActiveTrendPointDto> result = new ArrayList<>(rows.size());
+        for (Object[] row : rows) {
+            LocalDate day;
+            if (row[0] instanceof java.sql.Date sqlDate) {
+                day = sqlDate.toLocalDate();
+            } else if (row[0] instanceof LocalDate ld) {
+                day = ld;
+            } else {
+                day = LocalDate.parse(row[0].toString());
+            }
+            long count = ((Number) row[1]).longValue();
+
+            result.add(CustomerActiveTrendPointDto.builder()
+                    .date(day)
+                    .count(count)
+                    .build());
+        }
+        return result;
+    }
+
     public CustomerResponseDto getCustomerByUuid(UUID uuid) {
         Customer customer = customerRepository.findByCusUuid(uuid)
                 .orElseThrow(() -> new RuntimeException("Customer not found"));