#140 : Individual log files

src/utilities/logger.ts

@@ -1,11 +1,17 @@
 import pino from 'pino'
+import fs from 'fs'
+import path from 'path'
 
-const logger = pino({
+// Array of log types
+const LOG_TYPES = ['http', 'game', 'gameMaster', 'app'] as const
+type LogType = typeof LOG_TYPES[number]
+
+const createLogger = (name: LogType) => pino({
   level: process.env.LOG_LEVEL || 'debug',
   transport: {
     target: 'pino/file',
     options: {
-      destination: './logs/app.log',
+      destination: `./logs/${name}.log`,
       mkdir: true
     }
   },
@@ -15,7 +21,28 @@ const logger = pino({
     }
   },
   timestamp: pino.stdTimeFunctions.isoTime,
-  base: null // This will prevent hostname and pid from being included
+  base: null
 })
 
-export default logger
+// Create logger instances
+const loggers = Object.fromEntries(
+  LOG_TYPES.map(type => [type, createLogger(type)])
+) as Record<LogType, ReturnType<typeof createLogger>>
+
+const watchLogs = () => {
+  LOG_TYPES.forEach(type => {
+    const logFile = path.join(__dirname, '../../logs', `${type}.log`)
+
+    fs.watchFile(logFile, (curr, prev) => {
+      if (curr.size > prev.size) {
+        const stream = fs.createReadStream(logFile, { start: prev.size, end: curr.size })
+        stream.on('data', (chunk) => {
+          console.log(`[${type}] \n ${chunk.toString()}`)
+        })
+      }
+    })
+  })
+}
+
+export const { http: httpLogger, game: gameLogger, gameMaster: gameMasterLogger, app: appLogger } = loggers
+export { watchLogs }