illumut/dist/loglevel-debug.js

Plugin for JS logger loglevel which allows enable/disable debug output dynamically

(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.loglevelDebug = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
// shim for using process in browser

var process = module.exports = {};
var queue = [];
var draining = false;
var currentQueue;
var queueIndex = -1;

function cleanUpNextTick() {
    if (!draining || !currentQueue) {
        return;
    }
    draining = false;
    if (currentQueue.length) {
        queue = currentQueue.concat(queue);
    } else {
        queueIndex = -1;
    }
    if (queue.length) {
        drainQueue();
    }
}

function drainQueue() {
    if (draining) {
        return;
    }
    var timeout = setTimeout(cleanUpNextTick);
    draining = true;

    var len = queue.length;
    while(len) {
        currentQueue = queue;
        queue = [];
        while (++queueIndex < len) {
            if (currentQueue) {
                currentQueue[queueIndex].run();
            }
        }
        queueIndex = -1;
        len = queue.length;
    }
    currentQueue = null;
    draining = false;
    clearTimeout(timeout);
}

process.nextTick = function (fun) {
    var args = new Array(arguments.length - 1);
    if (arguments.length > 1) {
        for (var i = 1; i < arguments.length; i++) {
            args[i - 1] = arguments[i];
        }
    }
    queue.push(new Item(fun, args));
    if (queue.length === 1 && !draining) {
        setTimeout(drainQueue, 0);
    }
};

// v8 likes predictible objects
function Item(fun, array) {
    this.fun = fun;
    this.array = array;
}
Item.prototype.run = function () {
    this.fun.apply(null, this.array);
};
process.title = 'browser';
process.browser = true;
process.env = {};
process.argv = [];
process.version = ''; // empty string to avoid regexp issues
process.versions = {};

function noop() {}

process.on = noop;
process.addListener = noop;
process.once = noop;
process.off = noop;
process.removeListener = noop;
process.removeAllListeners = noop;
process.emit = noop;

process.binding = function (name) {
    throw new Error('process.binding is not supported');
};

process.cwd = function () { return '/' };
process.chdir = function (dir) {
    throw new Error('process.chdir is not supported');
};
process.umask = function() { return 0; };

},{}],2:[function(require,module,exports){
/*
* loglevel - https://github.com/pimterry/loglevel
*
* Copyright (c) 2013 Tim Perry
* Licensed under the MIT license.
*/
(function (root, definition) {
    "use strict";
    if (typeof module === 'object' && module.exports && typeof require === 'function') {
        module.exports = definition();
    } else if (typeof define === 'function' && typeof define.amd === 'object') {
        define(definition);
    } else {
        root.log = definition();
    }
}(this, function () {
    "use strict";
    var noop = function() {};
    var undefinedType = "undefined";

    function realMethod(methodName) {
        if (typeof console === undefinedType) {
            return false; // We can't build a real method without a console to log to
        } else if (console[methodName] !== undefined) {
            return bindMethod(console, methodName);
        } else if (console.log !== undefined) {
            return bindMethod(console, 'log');
        } else {
            return noop;
        }
    }

    function bindMethod(obj, methodName) {
        var method = obj[methodName];
        if (typeof method.bind === 'function') {
            return method.bind(obj);
        } else {
            try {
                return Function.prototype.bind.call(method, obj);
            } catch (e) {
                // Missing bind shim or IE8 + Modernizr, fallback to wrapping
                return function() {
                    return Function.prototype.apply.apply(method, [obj, arguments]);
                };
            }
        }
    }

    // these private functions always need `this` to be set properly

    function enableLoggingWhenConsoleArrives(methodName, level, loggerName) {
        return function () {
            if (typeof console !== undefinedType) {
                replaceLoggingMethods.call(this, level, loggerName);
                this[methodName].apply(this, arguments);
            }
        };
    }

    function replaceLoggingMethods(level, loggerName) {
        /*jshint validthis:true */
        for (var i = 0; i < logMethods.length; i++) {
            var methodName = logMethods[i];
            this[methodName] = (i < level) ?
                noop :
                this.methodFactory(methodName, level, loggerName);
        }
    }

    function defaultMethodFactory(methodName, level, loggerName) {
        /*jshint validthis:true */
        return realMethod(methodName) ||
               enableLoggingWhenConsoleArrives.apply(this, arguments);
    }

    var logMethods = [
        "trace",
        "debug",
        "info",
        "warn",
        "error"
    ];

    function Logger(name, defaultLevel, factory) {
      var self = this;
      var currentLevel;
      var storageKey = "loglevel";
      if (name) {
        storageKey += ":" + name;
      }

      function persistLevelIfPossible(levelNum) {
          var levelName = (logMethods[levelNum] || 'silent').toUpperCase();

          // Use localStorage if available
          try {
              window.localStorage[storageKey] = levelName;
              return;
          } catch (ignore) {}

          // Use session cookie as fallback
          try {
              window.document.cookie =
                encodeURIComponent(storageKey) + "=" + levelName + ";";
          } catch (ignore) {}
      }

      function getPersistedLevel() {
          var storedLevel;

          try {
              storedLevel = window.localStorage[storageKey];
          } catch (ignore) {}

          if (typeof storedLevel === undefinedType) {
              try {
                  var cookie = window.document.cookie;
                  var location = cookie.indexOf(
                      encodeURIComponent(storageKey) + "=");
                  if (location) {
                      storedLevel = /^([^;]+)/.exec(cookie.slice(location))[1];
                  }
              } catch (ignore) {}
          }

          // If the stored level is not valid, treat it as if nothing was stored.
          if (self.levels[storedLevel] === undefined) {
              storedLevel = undefined;
          }

          return storedLevel;
      }

      /*
       *
       * Public API
       *
       */

      self.levels = { "TRACE": 0, "DEBUG": 1, "INFO": 2, "WARN": 3,
          "ERROR": 4, "SILENT": 5};

      self.methodFactory = factory || defaultMethodFactory;

      self.getLevel = function () {
          return currentLevel;
      };

      self.setLevel = function (level, persist) {
          if (typeof level === "string" && self.levels[level.toUpperCase()] !== undefined) {
              level = self.levels[level.toUpperCase()];
          }
          if (typeof level === "number" && level >= 0 && level <= self.levels.SILENT) {
              currentLevel = level;
              if (persist !== false) {  // defaults to true
                  persistLevelIfPossible(level);
              }
              replaceLoggingMethods.call(self, level, name);
              if (typeof console === undefinedType && level < self.levels.SILENT) {
                  return "No console available for logging";
              }
          } else {
              throw "log.setLevel() called with invalid level: " + level;
          }
      };

      self.setDefaultLevel = function (level) {
          if (!getPersistedLevel()) {
              self.setLevel(level, false);
          }
      };

      self.enableAll = function(persist) {
          self.setLevel(self.levels.TRACE, persist);
      };

      self.disableAll = function(persist) {
          self.setLevel(self.levels.SILENT, persist);
      };

      // Initialize with the right level
      var initialLevel = getPersistedLevel();
      if (initialLevel == null) {
          initialLevel = defaultLevel == null ? "WARN" : defaultLevel;
      }
      self.setLevel(initialLevel, false);
    }

    /*
     *
     * Package-level API
     *
     */

    var defaultLogger = new Logger();

    var _loggersByName = {};
    defaultLogger.getLogger = function getLogger(name) {
        if (typeof name !== "string" || name === "") {
          throw new TypeError("You must supply a name when creating a logger.");
        }

        var logger = _loggersByName[name];
        if (!logger) {
          logger = _loggersByName[name] = new Logger(
            name, defaultLogger.getLevel(), defaultLogger.methodFactory);
        }
        return logger;
    };

    // Grab the current global log variable in case of overwrite
    var _log = (typeof window !== undefinedType) ? window.log : undefined;
    defaultLogger.noConflict = function() {
        if (typeof window !== undefinedType &&
               window.log === defaultLogger) {
            window.log = _log;
        }

        return defaultLogger;
    };

    return defaultLogger;
}));

},{}],3:[function(require,module,exports){
(function (process,global){
var BROWSER = typeof window !== 'undefined';

/**
 * Exports
 */
module.exports = loglevelDebug;
loglevelDebug.getMode = getMode;
loglevelDebug.enable = enable;
loglevelDebug.enabled = enabled;
loglevelDebug.disable = disable;

/**
 * Internal States
 */
var skips = [];
var names = [];
var _loggers = {};

/**
 * Composit a new object.
 *
 * Links all attributes of source object to
 * target object.
 *
 * @param {Object} src
 * @param {Object} target
 */
function composit(src, target) {
  var o = {};
  Object.keys(src).forEach(function(k) {
    var attr = src[k];
    target[k] = attr.bind ? attr.bind(k) : attr;
  });
}

/**
 * -----------------
 * Package level API
 * -----------------
 */

/**
 * Read environment variable.
 *
 * @param {String} key
 * @param {Any} defVal default value
 * @returns {Any}
 * @throws {Error}
 * @api private
 */
function readEnv(key, defVal) {
  var env = BROWSER ? global : process.env;
  var v = env[key];
  return v ? v : defVal;
}

/**
 * Set environment variable
 *
 * @param {String} key
 * @param {Any} val
 * @api private
 */
function setEnv(key, val) {
  var env = BROWSER ? global : process.env;
  env[key] = val;
}

/** To know which mode we are running.
 *
 * @return {String} debug or production
 * @api public
 */
function getMode() {
  return (names.length > 0 || skips.length >0) ?  'debug' : 'production';
}

/**
 * Enables a debug mode by namespaces. This can include modes
 * separated by a colon and wildcards.
 *
 * @param {String} namespaces
 * @api public
 */
function enable(namespaces) {
  if (!readEnv('DEBUG'))
    setEnv('DEBUG', namespaces);

  var split = (namespaces || '').split(/[\s,]+/);
  var len = split.length;

  for (var i = 0; i < len; i++) {
    if (!split[i]) continue; // ignore empty strings
    namespaces = split[i].replace(/\*/g, '.*?');
    if (namespaces[0] === '-') {
      skips.push(new RegExp('^' + namespaces.substr(1) + '$'));
    } else {
      names.push(new RegExp('^' + namespaces + '$'));
    }
  }

  for(var k in _loggers) {
    var logger = _loggers[k];
    if (enabled(k)) {
      logger.setLevel(logger.levels.DEBUG);
    }
    else {
      logger.setLevel(logger.levels.INFO);
    }
  }
}

/**
 * Returns true if the given mode name is enabled, false otherwise.
 *
 * @param {String} name
 * @return {Boolean}
 * @api public
 */
function enabled(name) {
  if (getMode() !== 'debug') return true;

  var i, len;
  for (i = 0, len = skips.length; i < len; i++) {
    if (skips[i].test(name)) {
      return false;
    }
  }
  for (i = 0, len = names.length; i < len; i++) {
    if (names[i].test(name)) {
      return true;
    }
  }
  return false;
}

/**
 * Disable debug mode.
 *
 * @api public
 */
function disable() {
  names = [];
  skips = [];
  for(var k in _loggers) {
    var logger = _loggers[k];
    logger.setLevel(logger.levels.INFO);
  }
}

/** Plugin itself
 *
 * Given a logger name, it returns a logger.
 * Given a loglevel logger, it replaced its original methodFactory.
 *
 * @param {String|Object} nameOrLogger logger name or a loglevel logger.
 * @return {Object} loglevel logger
 * @api public
 */
function loglevelDebug(nameOrLogger) {
  var DEBUG = readEnv('DEBUG');
  var log;

  if (typeof nameOrLogger === 'string') {
    log = _loggers[nameOrLogger] = require('loglevel').getLogger(nameOrLogger);
  }
  else if (typeof nameOrLogger === 'object') {
    log = nameOrLogger;
  }
  else {
    log = require('loglevel');
  }

  var originalFactory = log.methodFactory;
  log.methodFactory = function(methodName, logLevel, loggerName) {
    var rawMethod = originalFactory(methodName, logLevel, loggerName);
    var prefix = [
      '[' + methodName.toUpperCase() + ']',
      new Date(),
      loggerName
    ].join(' ');
    return function(message) {
      var args = Array.prototype.slice.call(arguments);
      args[0] = prefix + ' ' + args[0];
      return rawMethod.apply(this, args);
    };
  };

  if (DEBUG) {
    disable();
    enable(DEBUG);
  }
  else {
    log.setLevel(log.levels.INFO);
  }

  var callableLogger = function() {
    return log.debug.apply(this, arguments);
  };

  composit(log, callableLogger);
  return callableLogger;
}

}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"_process":1,"loglevel":2}]},{},[3])(3)
});