Simple symfony plugin to authenticate via Oauth
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The `asOauthPlugin` is a symfony (1.4.x) plugin that provides an easy way to authenticate the user against any Oauth providers.

It is easily configurable and extendable to meet any need. Like for example authenticate the user against Twitter or send some check-ins to Foursquare.

The plugin provides a module that takes care of contacting correctly the provider and catch their callback when successful.

The plugin requires the `oauth` library from PECL to function properly. (


- Clone the repository inside the plugins folder.
- Enable the plugin `asOauthPlugin` in the application configuration class.
- Enable the module `oauthConnect` in the application settings yaml file.
- Copy the file oauth.yml.sample in the root config folder of your project. Rename it as oauth.yml.
- Add the routes in the application routing yaml file.

For example:

  url:   /oauth/login
  param: { module: oauthConnect, action: index }
  url:   /oauth/callback
  param: { module: oauthConnect, action: callback }


You need to register your application to the provider by giving the complete URL to your route oauthConnect/callback at least.
Don't forget the service name to specify which provider is used.

For example:

The provider should then give you back the consumer tokens (secret and key) and the 3 different urls for its callbacks (request, access, authorize).
There are usually different options; specify that the application is web based and will used the provider for authentication.

With this data (the 2 tokens and the 3 urls), you can now edit the oauth.yml file from your root config folder.
The service name is a reference which specifies the configuration you are going to use. It is sent to the callback url given to the provider.
But also to the login which redirects the user to the provider for authentication.

For example, you can add this in a template:
<?php $service_name = "twitter" ?>
<?php echo link_to(image_tag('twitter-connect.png'), '@oauthSignIn?service='.$service_name) ?>

The last part to setup in the oauth.yaml is the callback class to handle the success of the authentication.
Basically you need to store some data in the session to authenticate the user or in a database to keep it available for later.

For example, for this configuration:
        class:         TwitterConnector
        method:        registerUser

This class will be called:

class TwitterConnector
  static public function registerUser($oauthUser, $service_config)

    //retrieve data
    $mdc = new TwitterDataAccess( $service_config );
    $mdc->init( $oauthUser->getOauthTokens() );
    $data = $mdc->getUserInfo();
    //authenticate the user and store some data in session
    //persistent storage
		//the tokens from $oauthUser->getOauthTokens() can be stored at this time to allow offline requests


The class `myOauthBase` can be extended and used to make oauth requests easily. 
Those requests can be done offline if the tokens are stored in a database for example.


- Use dependency injection with lazy loading instead of configuration + call_user_function_array.
- Add unit test.
- Better service management with default classes.
- ...