Basic logger with level logging which can also be independent.
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Latest commit c8d0ac6 Jan 14, 2017 @nmccready committed on GitHub Update README.md
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README.md

angular-simple-logger (nemLogging.nemSimpleLogger)

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TLDR, Example

Purpose:

To have simplified log levels where a supporting angular module's log levels are independent of the application.

Dependencies: (What can we make what was once simple/complicated (kinda))

How to decide which file from /dist to include in your project:

  • If using bower, include dist/angular-simple-logger.js. This is a drop-in replacement for browser.js. It is prepacked (all dependencies included). Do NOT use with Browserify or Webpack since it will break any commonJS compiler.

  • If using npm with Browserify or Webpack, include dist/index.js (CommonJS version). Do NOT use with bower.

  • *.light.js - any, will/should work with Browser, Brower and npm (with some love, but why?)

Why is it this way? Well visonmedia debug is complicated. See here . I am open to a better way so please work with me, not against me.

Bottom line: Here is what I recommend. If your using bower with a project that depends on this; bundle your vendor files seperatley via gulp, and main bowerfiles. Browserify, and Webpack can work with both bower and npm at the same time so it is up to you to make your whole app play nice (ie you can ignore stuff and not call require).

Also you can override which version (say point to*.light.js) for webpack and or browserify to use/target against.

If your lucky and all of your projects are in npm then you can eliminate bower and not worry about this.

In the end there are plenty of workarounds using the tools explained above.

Basic use:

angular.module('someApp', ['nemLogging'])
//note this can be any type of injectable angular dependency (factory, service.. etc)
.controller("someController", function ($scope, nemSimpleLogger) {
  nemSimpleLogger.doLog = true; //default is true
  nemSimpleLogger.currentLevel = nemSimpleLogger.LEVELS.debug;//defaults to error only
});  

Create a Custom Independent Loggers

(maybe 3 for one lib)

angular.module('someApp', ['nemLogging'])
//note this can be any type of injectable angular dependency (factory, service.. etc)
.service("apiLogger", function ($scope, nemSimpleLogger) {
  var logger = nemSimpleLogger.spawn();
  logger.currentLevel = logger.LEVELS.warn;
  return logger;
})
.service("businessLogicLogger", function ($scope, nemSimpleLogger) {
  var logger = nemSimpleLogger.spawn();
  logger.currentLevel = logger.LEVELS.error;
  return logger;
})
.service("terseLogger", function ($scope, nemSimpleLogger) {
  var logger = nemSimpleLogger.spawn();
  logger.currentLevel = logger.LEVELS.info;
  return logger;
});

Use your new creations!

angular.module('someApp', ['nemLogging'])
//note this can be any type of injectable angular dependency (factory, service.. etc)
.service("booksApi", function (apiLogger, $http) {
  //do something with your books
  $http.get("/ap/books").then(function(data){
    apiLogger.debug("books have come yay!");
  });
})
.controller("businessCtrl", function ($scope, businessLogicLogger, book) {
  businessLogicLogger.debug("new book");
  var b = new book();
  $scope.books = [b];
})
.controller("appCtrl", function ($rootScope, terseLogger) {
  $rootScope.$on "error", function(){
    terseLogger.error("something happened");
  }
});

Override all of $log (optional decorator)

Optionally (default is off) decorate $log to utilize log levels globally within the app.

Note this logger's currentLevel is debug! Where the order is debug, info, warn, error, log.

angular.module('someApp', ['nemLogging']))
.config(function($provide, nemSimpleLoggerProvider) {
  return $provide.decorator.apply(null, nemSimpleLoggerProvider.decorator);
})
.config(function($provide, nemSimpleLoggerProvider) {
  var logger = $provide.decorator.apply(null, nemSimpleLoggerProvider.decorator);
  //override level at config
  logger.currentLevel = logger.LEVELS.error;
  return logger;
})
.run(function($log){
  //at run time
  //override the default log level globally
  $log.currentLevel = $log.LEVELS.error;
});

Optional Debug Levels via debug

If you choose to use the full version of this library and no the light.

You can add finer grain debug levels via the visionmedia/debug API.

To use:

angular.module('someApp', ['nemLogging']))
//as a provider
.config(function(nemDebugProvider) {
  var debug = nemDebugProvider.debug;
  debug.enable("worker:*");
})
.service('LoggerLevelA', function(nemSimpleLogger) {
  //will have debug, info, warn, error, and log at disposal as before, but now debug is using the visionmedia/debug fn
  return nemSimpleLogger.spawn("worker:a");
})
.service('LoggerLevelB', function(nemSimpleLogger) {
  return nemSimpleLogger.spawn("worker:b");
})
//heck maybe you don't want all of the logger interface only want debug.. then
.service('JustDebugC',function(nemDebug) {
  return nemDebug("worker:c");
})
.run(function(nemDebug){
  //enable another debug level
  nemDebug.enable("coolStuff:*");
});

API

Underneath it all it is still calling $log so calling the logger for logging itself is the same.

  • LEVELS: available are debug, info, warn, error, log

  • doLog (boolean) - deaults to true. If set to false all logging for that logger instance is disabled.

  • currentLevel (number) - defaults to error: 4 corresponds to the current log level provided by LEVELS.

  • spawn - create a independent logger accepts a logger or a string (see visionmedia debug notes above). Defaults to $log