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<?php namespace Arcanedev\Socialite\Base; |
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use Arcanedev\Socialite\Contracts\Provider; |
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use Arcanedev\Socialite\Exceptions\InvalidStateException; |
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use GuzzleHttp\ClientInterface; |
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use Illuminate\Http\Request; |
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use Symfony\Component\HttpFoundation\RedirectResponse; |
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/** |
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* Class OAuthTwoProvider |
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* |
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* @package Arcanedev\Socialite\Base |
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* @author ARCANEDEV <[email protected]> |
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*/ |
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abstract class OAuthTwoProvider implements Provider |
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{ |
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/* ------------------------------------------------------------------------------------------------ |
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| Properties |
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| ------------------------------------------------------------------------------------------------ |
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*/ |
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/** |
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* The HTTP request instance. |
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* |
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* @var \Illuminate\Http\Request |
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*/ |
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protected $request; |
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/** |
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* The client ID. |
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* |
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* @var string |
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*/ |
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protected $clientId; |
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/** |
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* The client secret. |
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* |
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* @var string |
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*/ |
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protected $clientSecret; |
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/** |
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* The redirect URL. |
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* |
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* @var string |
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*/ |
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protected $redirectUrl; |
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/** |
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* The custom parameters to be sent with the request. |
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* |
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* @var array |
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*/ |
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protected $parameters = []; |
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/** |
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* The scopes being requested. |
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* |
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* @var array |
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*/ |
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protected $scopes = []; |
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/** |
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* The separating character for the requested scopes. |
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* |
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* @var string |
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*/ |
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protected $scopeSeparator = ','; |
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/** |
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* The type of the encoding in the query. |
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* |
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* @var int Can be either PHP_QUERY_RFC3986 or PHP_QUERY_RFC1738. |
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*/ |
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protected $encodingType = PHP_QUERY_RFC1738; |
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/** |
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* Indicates if the session state should be utilized. |
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* |
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* @var bool |
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*/ |
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protected $stateless = false; |
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/* ------------------------------------------------------------------------------------------------ |
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| Constructor |
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| ------------------------------------------------------------------------------------------------ |
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*/ |
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/** |
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* Create a new provider instance. |
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* |
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* @param \Illuminate\Http\Request $request |
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* @param string $clientId |
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* @param string $clientSecret |
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* @param string $redirectUrl |
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*/ |
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public function __construct(Request $request, $clientId, $clientSecret, $redirectUrl) |
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{ |
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$this->setRequest($request); |
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$this->clientId = $clientId; |
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$this->redirectUrl = $redirectUrl; |
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$this->clientSecret = $clientSecret; |
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} |
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/* ------------------------------------------------------------------------------------------------ |
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| Getters & Setters |
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| ------------------------------------------------------------------------------------------------ |
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*/ |
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/** |
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* Get the authentication URL for the provider. |
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* |
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* @param string $state |
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* |
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* @return string |
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*/ |
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abstract protected function getAuthUrl($state); |
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/** |
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* Get the token URL for the provider. |
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* |
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* @return string |
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*/ |
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abstract protected function getTokenUrl(); |
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/** |
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* Get the raw user for the given access token. |
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* |
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* @param string $token |
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* |
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* @return array |
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*/ |
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abstract protected function getUserByToken($token); |
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/** |
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* Get the code from the request. |
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* |
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* @return string |
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*/ |
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protected function getCode() |
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{ |
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return $this->request->input('code'); |
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} |
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/** |
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* Set the scopes of the requested access. |
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* |
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* @param array $scopes |
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* |
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* @return self |
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*/ |
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public function scopes(array $scopes) |
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{ |
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$this->scopes = array_unique(array_merge($this->scopes, $scopes)); |
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return $this; |
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} |
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/** |
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* Get the current scopes. |
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* |
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* @return array |
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*/ |
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public function getScopes() |
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{ |
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return $this->scopes; |
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} |
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/** |
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* Get a fresh instance of the Guzzle HTTP client. |
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* |
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* @return \GuzzleHttp\Client |
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*/ |
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protected function getHttpClient() |
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{ |
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return new \GuzzleHttp\Client; |
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} |
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/** |
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* Set the request instance. |
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* |
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* @param Request $request |
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* @return $this |
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*/ |
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public function setRequest(Request $request) |
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{ |
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$this->request = $request; |
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return $this; |
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} |
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/** |
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* Determine if the provider is operating with state. |
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* |
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* @return bool |
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*/ |
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protected function usesState() |
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{ |
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return ! $this->stateless; |
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} |
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/** |
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* Determine if the provider is operating as stateless. |
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* |
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* @return bool |
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*/ |
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protected function isStateless() |
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{ |
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return $this->stateless; |
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} |
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/** |
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* Indicates that the provider should operate as stateless. |
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* |
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* @return $this |
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*/ |
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public function stateless() |
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{ |
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$this->stateless = true; |
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return $this; |
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} |
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/** |
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* Set the custom parameters of the request. |
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* |
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* @param array $parameters |
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* |
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* @return self |
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*/ |
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public function with(array $parameters) |
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{ |
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$this->parameters = $parameters; |
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return $this; |
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} |
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/** |
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* Get the POST fields for the token request. |
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* |
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* @param string $code |
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* |
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* @return array |
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*/ |
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protected function getTokenFields($code) |
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{ |
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return [ |
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'client_id' => $this->clientId, |
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'client_secret' => $this->clientSecret, |
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'code' => $code, |
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'redirect_uri' => $this->redirectUrl, |
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]; |
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} |
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/** |
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* Get the access token from the token response body. |
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* |
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* @param string $body |
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* |
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* @return string |
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*/ |
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protected function parseAccessToken($body) |
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{ |
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return json_decode($body, true)['access_token']; |
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} |
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/* ------------------------------------------------------------------------------------------------ |
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| Main Functions |
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| ------------------------------------------------------------------------------------------------ |
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*/ |
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/** |
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* Redirect the user of the application to the provider's authentication screen. |
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* |
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* @return \Symfony\Component\HttpFoundation\RedirectResponse |
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*/ |
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public function redirect() |
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{ |
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$state = null; |
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if ($this->usesState()) { |
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$this->request->getSession()->set('state', $state = str_random(40)); |
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} |
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return new RedirectResponse($this->getAuthUrl($state)); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function user() |
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{ |
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if ($this->hasInvalidState()) { |
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throw new InvalidStateException; |
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} |
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$user = $this->mapUserToObject($this->getUserByToken( |
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$token = $this->getAccessToken($this->getCode()) |
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)); |
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return $user->setToken($token); |
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} |
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/** |
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* Get the authentication URL for the provider. |
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* |
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* @param string $url |
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* @param string $state |
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* |
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* @return string |
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*/ |
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protected function buildAuthUrlFromBase($url, $state) |
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{ |
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return $url . '?' . http_build_query($this->getCodeFields($state), '', '&', $this->encodingType); |
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} |
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/** |
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* Get the GET parameters for the code request. |
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* |
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* @param string|null $state |
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* |
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* @return array |
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*/ |
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protected function getCodeFields($state = null) |
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{ |
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$fields = [ |
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'client_id' => $this->clientId, 'redirect_uri' => $this->redirectUrl, |
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'scope' => $this->formatScopes($this->scopes, $this->scopeSeparator), |
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'response_type' => 'code', |
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]; |
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if ($this->usesState()) { |
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$fields['state'] = $state; |
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} |
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return array_merge($fields, $this->parameters); |
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} |
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/** |
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* Format the given scopes. |
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* |
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* @param array $scopes |
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* @param string $scopeSeparator |
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* |
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* @return string |
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*/ |
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protected function formatScopes(array $scopes, $scopeSeparator) |
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{ |
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return implode($scopeSeparator, $scopes); |
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} |
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/** |
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* Get a Social User instance from a known access token. |
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* |
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* @param string $token |
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* |
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* @return \Arcanedev\Socialite\OAuth\Two\User |
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*/ |
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public function userFromToken($token) |
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{ |
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$user = $this->mapUserToObject($this->getUserByToken($token)); |
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return $user->setToken($token); |
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} |
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/** |
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* Map the raw user array to a Socialite User instance. |
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* |
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* @param array $user |
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* |
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* @return \Arcanedev\Socialite\OAuth\Two\User |
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*/ |
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abstract protected function mapUserToObject(array $user); |
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/** |
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* Determine if the current request / session has a mismatching "state". |
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* |
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* @return bool |
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*/ |
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protected function hasInvalidState() |
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{ |
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if ($this->isStateless()) { |
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return false; |
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} |
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$state = $this->request->getSession()->pull('state'); |
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return ! (strlen($state) > 0 && $this->request->input('state') === $state); |
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} |
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/** |
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* Get the access token for the given code. |
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* |
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* @param string $code |
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* |
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* @return string |
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*/ |
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public function getAccessToken($code) |
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{ |
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$postKey = (version_compare(ClientInterface::VERSION, '6') === 1) ? 'form_params' : 'body'; |
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$response = $this->getHttpClient()->post($this->getTokenUrl(), [ |
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'headers' => ['Accept' => 'application/json'], |
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$postKey => $this->getTokenFields($code), |
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]); |
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return $this->parseAccessToken($response->getBody()); |
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} |
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} |
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