feat: logger 날짜 분리 추가

src/libs/logger.ts

@@ -2,43 +2,86 @@ import { NextRequest } from 'next/server'
 import { join } from 'path'
 import pino from 'pino'
 
-/* 로그 파일 경로 */
-const logFilePath = join('.', 'logs', 'onsite-survey.log')
+/* 로그 데이터 인터페이스 */
+interface LogData {
+  timestamp: string
+  status: number
+  method: string
+  url: string
+  // headers: { [k: string]: string }
+  query: { [k: string]: string }
+  body: string | undefined
+}
 
-/* 로거 생성 함수 */
-const createLogger = (): pino.Logger => {
-  try {
-    return pino({
-      level: 'info',
-      timestamp: pino.stdTimeFunctions.isoTime,
-      transport: {
-        targets: [
-          {
-            target: 'pino/file',
-            options: {
-              destination: logFilePath,
-              mkdir: true,
-              sync: false,
-            },
-          },
-        ],
+/* 날짜별 로그 파일 경로 생성 함수 */
+const getLogFilePath = (): string => {
+  const today = new Date().toISOString().split('T')[0] // YYYY-MM-DD 형식
+  return join(process.cwd(), 'logs', `onsite-survey-${today}.log`)
+}
+
+/* 날짜별 로거 생성 클래스 */
+class DailyLogger {
+  private currentDate: string
+  private logger: pino.Logger
+  private destination: ReturnType<typeof pino.destination>
+
+  constructor() {
+    this.currentDate = new Date().toISOString().split('T')[0]
+    this.destination = pino.destination({
+      dest: getLogFilePath(),
+      mkdir: true,
+      sync: false,
+    })
+    this.logger = this.createLogger()
+
+    /* kill signal 핸들러 등록 */
+    process.on('SIGTERM', this.handleShutdown.bind(this))
+    process.on('SIGINT', this.handleShutdown.bind(this))
+  }
+
+  private async handleShutdown(): Promise<void> {
+    this.destination.flushSync()
+    this.destination.end()
+  }
+
+  private createLogger(): pino.Logger {
+    return pino(
+      {
+        level: 'info',
+        timestamp: pino.stdTimeFunctions.isoTime,
       },
-    })
-  } catch (error) {
-    console.error('Pino transport 생성 실패, 기본 로거 사용:', error)
-    return pino({
-      level: 'info',
-      timestamp: pino.stdTimeFunctions.isoTime,
-    })
+      this.destination,
+    )
+  }
+
+  public info(obj: any, msg?: string): void {
+    const today = new Date().toISOString().split('T')[0]
+
+    if (today !== this.currentDate) {
+      /* 기존 destination 종료 */
+      this.destination.flushSync()
+      this.destination.end()
+
+      /* 새로운 destination 생성 */
+      this.destination = pino.destination({
+        dest: getLogFilePath(),
+        mkdir: true,
+        sync: false,
+      })
+      this.currentDate = today
+      this.logger = this.createLogger()
+    }
+
+    this.logger.info(obj, msg)
   }
 }
 
 /* 로거 인스턴스 */
-export const logger = createLogger()
+const dailyLogger = new DailyLogger()
 
 /* 로그 기록 함수 */
 export const writeLog = async (request: NextRequest, responseStatus: number): Promise<void> => {
-  const logData = {
+  const logData: LogData = {
     timestamp: new Date().toISOString(),
     status: responseStatus,
     method: request.method,
@@ -47,5 +90,5 @@ export const writeLog = async (request: NextRequest, responseStatus: number): Pr
     query: Object.fromEntries(new URL(request.url).searchParams),
     body: request.body ? await request.clone().text() : undefined,
   }
-  logger.info(logData, 'API Request')
+  dailyLogger.info(logData, 'API Request')
 }