angular-pub-sub

Straightforward Publish-Subscribe module for AngularJS. Supports messages with multiple parameters and supports keeping a message history and rewinding upon subscription.

Documentation

This README and plenty of JSDOC comments if you feel like messing around with the code. Feel free to reach out here or on twitter (@jmnsferreira) if anything's unclear.

Install

1st: Get the code:

• From distribution file
  1. Download angular-pub-sub.js (or the -min version);
  2. Include after AngularJS.
• From npm:
  1. npm install angular-pub-sub

2nd: Add Module Dependency

...
var myApp = angular.module('myApp', ['PubSubModule']);
...

Configuration

setMaxHistory

Set the maximum number of messages to store in the history for playback upon subscription. Default is 10.

app.config(['pubSubProvider', function(pubSubProvider) {
  pubSubProvider.setMaxHistory(5);
}]);

Usage

publish

Publish a message to a channel.

Args:

• channel - A String that identifies a channel (can be a new channel).
• message* - Any number of arguments, can be zero for a simple "ping", of any data type to pass onto subscribers.

Return: undefined

Example:

myApp.controller('ItemsCtrl', function($scope, pubSub) {
  var nextPage = function () {
    ...
    pubSub.publish('nav-analytics', 'items', $scope.currentPage);
    ...
  };
});

subscribe

Subscribe to a channel to receive future messages and, optionally, previous ones.

Args:

• channel - A String that identifies a channel. Same string as used in publish.
• callback - A Function that will be executed with each message that is published on the selected channel.
• playback - (Optional) When true, messages previously published on channel will be played back (applied on callback). Doesn't playback by default.
• maxPlayback - (Optional) An Integer; the maximum number of messages to play back. Default is all available.

Return: A Function that will unsubscribe from channel when called.

Example:

myApp.controller('AnalyticsCtrl', function($scope, pubSub) {
  var killAnalytics = null;

  var trackPageView = function (name, page) {
    _analytics.track(name, page);
  };

  var setUp = function () {
    ...
    killAnalytics = pubSub.subscribe('nav-analytics', trackPageView, true, 1);
    ...
  };

  var setDown = function () { killAnalytics(); };
});

Contributing

• Fork it.
• Create an issue before adding a feature.
• Keep the code style as possible (or change it if it's an improvement).
• Add tests for what you do.

Developing:

Clone the project:

$ git clone https://github.com/<your-repo>/angular-pub-sub.git
$ cd angular-pub-sub
$ npm install
$ bower install

Run the tests:

$ grunt test

Deploying:

$ grunt dist