Fixing winston duplicate loggers issue

config/log.js

@@ -3,20 +3,28 @@
 const winston = require("winston");
 require("winston-daily-rotate-file");
 
-module.exports = function(logFileName, logLevel) {
+const winstonAttached = new Map();
-  winston.cli();
 
-  winston.level = logLevel;
+module.exports = (logFileName, logLevel) => {
+  if (!winstonAttached.has(logFileName)) {
+    winston.cli();
+  
+    winston.level = logLevel;
+  
+    winston.add(winston.transports.DailyRotateFile, {
+      filename: logFileName,
+      datePattern: "yyyy-MM-dd.",
+      prepend: true,
+      json: false,
+      maxSize: 1000000,
+      maxFiles: 7,
+      level: logLevel
+    });
 
-  winston.add(winston.transports.DailyRotateFile, {
+    winstonAttached.set(logFileName, winston)
-    filename: logFileName,
+  
-    datePattern: "yyyy-MM-dd.",
+    return winston;
-    prepend: true,
+  }
-    json: false,
-    maxSize: 1000000,
-    maxFiles: 7,
-    level: logLevel
-  });
 
-  return winston;
+  return winstonAttached.get(logFileName);
 };