Fix overflow by changing integer type to long type in payroll calculation logic

src/main/kotlin/com/moa/controller/HomeController.kt

@@ -4,7 +4,6 @@ import com.moa.common.auth.Auth
 import com.moa.common.auth.AuthMemberInfo
 import com.moa.common.response.ApiResponse
 import com.moa.service.ProfileService
-import com.moa.service.WorkPolicyService
 import com.moa.service.WorkdayService
 import com.moa.service.dto.HomeResponse
 import io.swagger.v3.oas.annotations.tags.Tag
@@ -17,7 +16,6 @@ import java.time.LocalDate
 class HomeController(
     private val profileService: ProfileService,
     private val workdayService: WorkdayService,
-    private val workPolicyService: WorkPolicyService,
 ) {
 
     @GetMapping("/api/v1/home")

src/main/kotlin/com/moa/service/EarningsCalculator.kt

@@ -31,7 +31,7 @@ class EarningsCalculator(
      * @param date 기준 날짜 (이 날짜가 속한 월의 마지막 날을 기준으로 유효한 급여 정책을 적용합니다)
      * @return 계산된 기본 월급 금액. 적용할 수 있는 급여 정보가 존재하지 않으면 `null`을 반환합니다.
      */
-    fun getDefaultMonthlySalary(memberId: Long, date: LocalDate): Int? {
+    fun getDefaultMonthlySalary(memberId: Long, date: LocalDate): Long? {
         val lastDayOfMonth = YearMonth.from(date).atEndOfMonth()
         val payroll = payrollVersionRepository
             .findTopByMemberIdAndEffectiveFromLessThanEqualOrderByEffectiveFromDesc(
@@ -40,9 +40,9 @@ class EarningsCalculator(
 
         return when (SalaryType.from(payroll.salaryInputType)) {
             SalaryType.YEARLY -> payroll.salaryAmount.toBigDecimal()
-                .divide(BigDecimal(12), 0, RoundingMode.HALF_UP).toInt()
+                .divide(BigDecimal(12), 0, RoundingMode.HALF_UP).toLong()
 
-            SalaryType.MONTHLY -> payroll.salaryAmount.toInt()
+            SalaryType.MONTHLY -> payroll.salaryAmount
         }
     }
 

src/main/kotlin/com/moa/service/WorkdayService.kt

@@ -220,7 +220,7 @@ class WorkdayService(
         }
 
         return MonthlyEarningsResponse(
-            workedEarnings = totalEarnings.toInt(),
+            workedEarnings = totalEarnings.toLong(),
             standardSalary = defaultSalary,
             workedMinutes = workedMinutes,
             standardMinutes = standardMinutes,

src/main/kotlin/com/moa/service/dto/HomeResponse.kt

@@ -6,8 +6,8 @@ import java.time.LocalTime
 
 data class HomeResponse(
     val workplace: String?,
-    val workedEarnings: Int,
-    val standardSalary: Int,
+    val workedEarnings: Long,
+    val standardSalary: Long,
     val dailyPay: Int,
     val type: DailyWorkScheduleType,
     @field:JsonFormat(pattern = "HH:mm")

src/main/kotlin/com/moa/service/dto/MonthlyEarningsResponse.kt

@@ -1,8 +1,8 @@
 package com.moa.service.dto
 
 data class MonthlyEarningsResponse(
-    val workedEarnings: Int,
-    val standardSalary: Int,
+    val workedEarnings: Long,
+    val standardSalary: Long,
     val workedMinutes: Long,
     val standardMinutes: Long,
 )