move from tracer to winston for logging

utils/logger.js

@@ -0,0 +1,65 @@
+'use strict'
+
+const { createLogger, format, transports, addColors } = require('winston')
+require('winston-daily-rotate-file')
+const fs = require('fs')
+
+if (!fs.existsSync('logs')) {
+  fs.mkdirSync('logs')
+}
+
+const dailyRotateFileTransport = new transports.DailyRotateFile({
+  filename: 'logs/%DATE%.log',
+  datePattern: 'YYYY-MM-DD'
+})
+
+const customLevels = {
+  levels: {
+    fatal: 0,
+    error: 1,
+    warn: 2,
+    ready: 3,
+    info: 4,
+    cmd: 5,
+    debug: 6
+  },
+
+  colors: {
+    fatal: 'bold red',
+    error: 'red',
+    warn: 'yellow',
+    ready: 'green',
+    info: 'cyan',
+    cmd: 'white',
+    debug: 'magenta'
+  }
+}
+
+const logger = createLogger({
+  level: 'info',
+  levels: customLevels.levels,
+  format: format.combine(
+    format.timestamp({
+      format: 'YYYY-MM-DD HH:mm:ss'
+    }),
+    format.printf(info => `${info.timestamp} ${info.level}: ${info.message}`)
+  ),
+
+  transports: [
+    new transports.Console({
+      level: 'info',
+      format: format.combine(
+        format.colorize(),
+        format.printf(
+          info => `${info.timestamp} ${info.level}: ${info.message}`
+        )
+      )
+    }),
+
+    dailyRotateFileTransport
+  ]
+})
+
+addColors(customLevels.colors)
+
+module.exports = logger