# Setup

Install package

composer require contributte/oauth2-client
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# Supported flows

Take a look at integration for usage

# Google

# Facebook

# Others

You could implement other providers which support auth code authentication by extending Contributte\OAuth2Client\Flow\AuthCodeFlow. Other authentication methods are currently not supported (PR is welcome).

List of all providers is here (opens new window)

# Integration

This example uses Google as provider with integration through league/oauth2-google (opens new window)

Install package

composer require league/oauth2-google
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Get your oauth2 credentials (clientId and clientSecret) from Google website (opens new window)

Register flow

services:
  - Contributte\OAuth2Client\Flow\Google\GoogleProvider([
      clientId: 
      clientSecret:
    ])
  - Contributte\OAuth2Client\Flow\Google\GoogleAuthCodeFlow
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Create a control which can handle authentication and authorization

use Contributte\OAuth2Client\Flow\Google\GoogleAuthCodeFlow;
use League\OAuth2\Client\Provider\Exception\IdentityProviderException;
use League\OAuth2\Client\Provider\GoogleUser;
use Nette\Application\UI\Control;

class GoogleButton extends Control
{

	/** @var GoogleAuthCodeFlow */
	private $flow;

	public function __construct(GoogleAuthCodeFlow $flow)
	{
		parent::__construct();
		$this->flow = $flow;
	}

	public function authenticate(): void
	{
		$this->flow->getProvider()->setRedirectUri(
			$this->presenter->link('//:Sign:googleAuthorize')
		);
		$this->presenter->redirectUrl($this->flow->getAuthorizationUrl());
	}

	public function authorize(array $parameters): void
	{
		// Setup propel redirect URL
		$this->flow->getProvider()->setRedirectUri(
			$this->presenter->link('//:Sign:googleAuthorize')
		);

		try {
			$accessToken = $this->flow->getAccessToken($parameters);
		} catch (IdentityProviderException $e) {
			// TODO - Identity provider failure, cannot get information about user
		}

		/** @var GoogleUser $owner */
		$owner = $this->flow->getProvider()->getResourceOwner($accessToken);

		// TODO - try sign in user with it's email ($owner->getEmail())
	}

}
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Add control to sign presenter

use Nette\Application\UI\Presenter;

class SignPresenter extends Presenter
{
	
	public function actionGoogleAuthenticate(): void
	{
		$this['googleButton']->authenticate();
	}
	
	public function actionGoogleAuthorize(): void
	{
		$this['googleButton']->authorize($this->getHttpRequest()->getQuery());
	}
	
	protected function createComponentGoogleButton(): GoogleButton
	{
		// TODO - create and return GoogleButton control
	}
	
}
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Create link to authentication action

<a href="{plink :Front:Sign:googleAuthenticate}">Sign in with Google</a>
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That's all!