From bdeb7b9c41719cd801bed2ce69fcf700b1929201 Mon Sep 17 00:00:00 2001
From: e-cloud <saintscott119@gmail.com>
Date: Thu, 14 Jul 2016 22:06:01 +0800
Subject: [PATCH] refactor: level.js

pick the getLevel function back from log4js.js
---
 lib/levels.js | 103 ++++++++++++++++++++++++++++++--------------------
 1 file changed, 61 insertions(+), 42 deletions(-)

diff --git a/lib/levels.js b/lib/levels.js
index 9ace363..2d981ac 100644
--- a/lib/levels.js
+++ b/lib/levels.js
@@ -1,66 +1,85 @@
-"use strict";
+'use strict';
+
+/**
+ * @name Level
+ * @namespace Log4js
+ */
+class Level {
+  constructor(level, levelStr) {
+    this.level = level;
+    this.levelStr = levelStr;
+  }
+
+  toString() {
+    return this.levelStr;
+  }
+
+  isLessThanOrEqualTo(otherLevel) {
+    if (typeof otherLevel === 'string') {
+      otherLevel = toLevel(otherLevel);
+    }
+    return this.level <= otherLevel.level;
+  }
+
+  isGreaterThanOrEqualTo(otherLevel) {
+    if (typeof otherLevel === 'string') {
+      otherLevel = toLevel(otherLevel);
+    }
+    return this.level >= otherLevel.level;
+  }
+
+  isEqualTo(otherLevel) {
+    if (typeof otherLevel === 'string') {
+      otherLevel = toLevel(otherLevel);
+    }
+    return this.level === otherLevel.level;
+  }
 
-function Level(level, levelStr) {
-  this.level = level;
-  this.levelStr = levelStr;
 }
 
 /**
  * converts given String to corresponding Level
- * @param {String} sArg String value of Level OR Log4js.Level
- * @param {Log4js.Level} defaultLevel default Level, if no String representation
- * @return Level object
- * @type Log4js.Level
+ * @param {Level|String} sArg -- String value of Level OR Log4js.Level
+ * @param {Level} [defaultLevel] -- default Level, if no String representation
+ * @return {Level}
  */
 function toLevel(sArg, defaultLevel) {
   if (!sArg) {
     return defaultLevel;
   }
+
   if (sArg instanceof Level) {
     module.exports[sArg.toString()] = sArg;
     return sArg;
   }
-  if (typeof sArg === "string") {
+
+  if (typeof sArg === 'string') {
     return module.exports[sArg.toUpperCase()] || defaultLevel;
   }
+
   return toLevel(sArg.toString());
 }
 
-Level.prototype.toString = function () {
-  return this.levelStr;
-};
-
-Level.prototype.isLessThanOrEqualTo = function (otherLevel) {
-  if (typeof otherLevel === "string") {
-    otherLevel = toLevel(otherLevel);
+function getLevel(levelStr) {
+  let level;
+  if (typeof levelStr === 'string') {
+    const levelUpper = levelStr.toUpperCase();
+    level = toLevel(levelUpper);
   }
-  return this.level <= otherLevel.level;
-};
-
-Level.prototype.isGreaterThanOrEqualTo = function (otherLevel) {
-  if (typeof otherLevel === "string") {
-    otherLevel = toLevel(otherLevel);
-  }
-  return this.level >= otherLevel.level;
-};
-
-Level.prototype.isEqualTo = function (otherLevel) {
-  if (typeof otherLevel === "string") {
-    otherLevel = toLevel(otherLevel);
-  }
-  return this.level === otherLevel.level;
-};
+  return level;
+}
 
 module.exports = {
-  ALL: new Level(Number.MIN_VALUE, "ALL"),
-  TRACE: new Level(5000, "TRACE"),
-  DEBUG: new Level(10000, "DEBUG"),
-  INFO: new Level(20000, "INFO"),
-  WARN: new Level(30000, "WARN"),
-  ERROR: new Level(40000, "ERROR"),
-  FATAL: new Level(50000, "FATAL"),
-  MARK: new Level(9007199254740992, "MARK"), // 2^53
-  OFF: new Level(Number.MAX_VALUE, "OFF"),
+  ALL: new Level(Number.MIN_VALUE, 'ALL'),
+  TRACE: new Level(5000, 'TRACE'),
+  DEBUG: new Level(10000, 'DEBUG'),
+  INFO: new Level(20000, 'INFO'),
+  WARN: new Level(30000, 'WARN'),
+  ERROR: new Level(40000, 'ERROR'),
+  FATAL: new Level(50000, 'FATAL'),
+  MARK: new Level(9007199254740992, 'MARK'), // 2^53
+  OFF: new Level(Number.MAX_VALUE, 'OFF'),
   toLevel: toLevel,
-  Level: Level
+  Level: Level,
+  getLevel: getLevel
 };