feat(hariko-logger): logger make from lib #20

package.json

@@ -28,7 +28,7 @@
   "license": "MIT",
   "dependencies": {
     "body-parser": "^1.13.2",
-    "colors": "^1.1.2",
+    "colors": "^1.3.3",
     "dateformat": "^1.0.11",
     "express": "^4.13.1",
     "gaze": "^1.1.3",
@@ -42,6 +42,7 @@
     "yargs": "^3.15.0"
   },
   "devDependencies": {
+    "@types/dateformat": "^3.0.0",
     "@types/json5": "0.0.30",
     "@types/mocha": "^5.2.6",
     "@types/node": "^11.13.8",

src/hariko-logger/index.ts

@@ -0,0 +1,66 @@
+import 'colors'
+import dateformat from 'dateformat'
+
+type LevelType = 'debug' | 'verbose' | 'info' | 'warn' | 'error'
+
+const LOG_LEVELS = {
+  error: 5,
+  warn: 4,
+  info: 3,
+  verbose: 2,
+  debug: 1
+}
+const LOG_COLORS = {
+  error: 'red',
+  warn: 'yellow',
+  info: 'green',
+  verbose: 'cyan',
+  debug: 'magenta'
+}
+
+export class Logger {
+  private level_name: LevelType
+  private time: boolean
+
+  set level(value: LevelType) {
+    if (!LOG_LEVELS[value])
+      throw new Error("Unsupported log level '" + value + "'")
+    this.level_name = value
+  }
+
+  get level() {
+    return this.level_name
+  }
+
+  log(level: LevelType, ...args: any[]) {
+    // logger.log(level, 'format text', arg1, arg2 ...);
+    if (LOG_LEVELS[this.level] > LOG_LEVELS[level]) return
+    console.log.apply(console, this.format(level, args))
+  }
+  format(level: LevelType, args: any[]) {
+    var format = args.shift()
+    var tag = '[' + level.toUpperCase() + ']'
+    var time = this.time ? '[' + dateformat(new Date(), 'HH:MM:ss:l') + ']' : ''
+    args.unshift(time.grey + tag[LOG_COLORS[level]] + ' ' + format)
+    return args
+  }
+  debug(...args: any[]) {
+    this.log('debug', ...args)
+  }
+  verbose(...args: any[]) {
+    this.log('verbose', ...args)
+  }
+  info(...args: any[]) {
+    this.log('info', ...args)
+  }
+  warn(...args: any[]) {
+    this.log('warn', ...args)
+  }
+  error(...args: any[]) {
+    this.log('error', ...args)
+  }
+}
+
+export const logger = new Logger()
+
+export default logger // migration