log to file

config.example.toml

@@ -76,3 +76,8 @@
 			pass=""
 		[email.transport.tls]
 			rejectUnauthorized=false
+
+# Application log file location
+[logger]
+	write=true
+	file="/var/log/icynet.log"

scripts/logger.js

@@ -1,3 +1,10 @@
+import config from './load-config'
+import path from 'path'
+import fs from 'fs'
+import util from 'util'
+
+let lfs
+
 function pz (z) {
   if (z < 10) {
     return '0' + z
@@ -5,30 +12,41 @@ function pz (z) {
   return z
 }
 
+// Time stamp constructor
 function dateFormat (date) {
   return date.getDate() + '/' + (date.getMonth() + 1) + '/' + date.getFullYear() + ' ' +
          pz(date.getHours()) + ':' + pz(date.getMinutes()) + ':' + pz(date.getSeconds())
 }
 
+// Console.log/error/warn "middleware" - add timestamp and write to file
+function stampAndWrite (fnc, prfx, message) {
+  let prefix = '[' + prfx + '] [' + dateFormat(new Date()) + '] '
+  message = prefix + message
+
+  if (lfs) {
+    lfs.write(message + '\n')
+  }
+
+  fnc.call(this, message)
+}
+
+// Reassign logger functions and send them to the "middleware"
 const realConsoleLog = console.log
 console.log = function () {
-  process.stdout.write('\x1b[2K\r')
-  process.stdout.write('[info] [' + dateFormat(new Date()) + '] ')
-  realConsoleLog.apply(this, arguments)
+  let message = util.format.apply(null, arguments)
+  stampAndWrite.call(this, realConsoleLog, 'info', message)
 }
 
 const realConsoleWarn = console.warn
 console.warn = function () {
-  process.stdout.write('\x1b[2K\r')
-  process.stdout.write('[warn] [' + dateFormat(new Date()) + '] ')
-  realConsoleWarn.apply(this, arguments)
+  let message = util.format.apply(null, arguments)
+  stampAndWrite.call(this, realConsoleWarn, 'warn', message)
 }
 
 const realConsoleError = console.error
 console.error = function () {
-  process.stderr.write('\x1b[2K\r')
-  process.stderr.write('[ err] [' + dateFormat(new Date()) + '] ')
-  realConsoleError.apply(this, arguments)
+  let message = util.format.apply(null, arguments)
+  stampAndWrite.call(this, realConsoleError, ' err', message)
 }
 
 module.exports = function () {
@@ -43,4 +61,15 @@ module.exports = function () {
       console.log('[%s] %s', pid, msg)
     }
   }
+
+  // Create log file write stream
+  if (!config.logger || !config.logger.write) return
+
+  try {
+    lfs = fs.createWriteStream(path.resolve(config.logger.file), {flags: 'a'})
+  } catch (e) {
+    lfs = null
+    console.error('Failed to initiate log file write stream')
+    console.error(e.stack)
+  }
 }