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<?php |
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/* |
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* This file is part of the Pinterest PHP library. |
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* |
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* (c) Hans Ott <[email protected]> |
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* |
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* This source file is subject to the MIT license that is bundled |
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* with this source code in the file LICENSE.md. |
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* |
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* Source: https://github.com/hansott/pinterest-php |
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*/ |
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namespace Pinterest; |
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use Pinterest\App\Scope; |
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use Pinterest\Http\Request; |
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use Pinterest\Http\ClientInterface; |
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use Pinterest\Api\Exceptions\TokenMissing; |
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use Pinterest\Api\Exceptions\TooManyScopesGiven; |
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use Pinterest\Api\Exceptions\AtLeastOneScopeNeeded; |
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use Pinterest\Api\Exceptions\InvalidScopeException; |
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use Pinterest\Http\Exceptions\RateLimitedReached; |
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/** |
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* This class is responsible for authenticating requests. |
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* |
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* @author Toon Daelman <[email protected]> |
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*/ |
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final class Authentication implements ClientInterface |
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{ |
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/** |
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* The API base uri. |
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* |
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* @var string |
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*/ |
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const BASE_URI = 'https://api.pinterest.com'; |
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/** |
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* The API version. |
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* |
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* @var string |
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*/ |
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const API_VERSION = 'v1'; |
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/** |
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* The HTTP client. |
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* |
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* @var ClientInterface |
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*/ |
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private $http; |
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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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private $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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private $clientSecret; |
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/** |
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* The access token. |
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* |
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* @var string |
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*/ |
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private $accessToken; |
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/** |
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* The Constructor. |
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* |
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* @param ClientInterface $client The http client. |
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* @param string $clientId The client id. |
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* @param string $clientSecret The client secret. |
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*/ |
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public function __construct(ClientInterface $client, $clientId, $clientSecret) |
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{ |
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$this->http = $client; |
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$this->clientId = (string) $clientId; |
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$this->clientSecret = (string) $clientSecret; |
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} |
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/** |
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* Alternative constructor for when we already have an accessToken. |
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* |
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* @param ClientInterface $client The (un-authenticated) HTTP client. |
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* @param string $clientId The client id. |
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* @param string $clientSecret The client secret. |
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* @param string $accessToken The OAuth access token. |
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* |
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* @return static |
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*/ |
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public static function withAccessToken( |
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ClientInterface $client, |
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$clientId, |
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$clientSecret, |
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$accessToken |
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) { |
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$authentication = new static($client, $clientId, $clientSecret); |
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$authentication->accessToken = (string) $accessToken; |
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return $authentication; |
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} |
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/** |
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* Alternative constructor for when we only have an accessToken. |
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* |
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* ATTENTION: only the execute method will work, as the others need client id and secret. |
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* |
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* @param ClientInterface $client The HTTP client. |
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* @param string $accessToken The OAuth access token. |
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* |
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* @return static |
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*/ |
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public static function onlyAccessToken( |
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ClientInterface $client, |
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$accessToken |
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) { |
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$authentication = new static($client, null, null); |
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$authentication->accessToken = (string) $accessToken; |
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return $authentication; |
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} |
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private function getBaseUriWithVersion() |
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{ |
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return sprintf('%s/%s/', static::BASE_URI, static::API_VERSION); |
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} |
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/** |
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* First step of the OAuth process. |
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* |
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* @param string $redirectUrl The OAuth redirect url (where code gets sent). |
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* @param array $scopes An array of scopes (see assertValidScopes). |
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* @param string $state A unique code you can use to check if the redirect is not spoofed. |
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* |
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* @return string The redirect url. |
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*/ |
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public function getAuthenticationUrl($redirectUrl, array $scopes, $state) |
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{ |
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$this->assertValidScopes($scopes); |
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$params = array( |
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'response_type' => 'code', |
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'redirect_uri' => (string) $redirectUrl, |
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'client_id' => $this->clientId, |
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'scope' => implode(',', $scopes), |
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'state' => (string) $state, |
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); |
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return sprintf( |
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'https://api.pinterest.com/oauth/?%s', |
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http_build_query($params) |
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); |
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} |
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/** |
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* Checks if an array of given scopes contains only valid scopes (and at least one). |
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* |
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* @param array $scopes The array of scopes to check. |
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* |
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* @throws InvalidScopeException When invalid scope in the given array. |
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* @throws AtLeastOneScopeNeeded When no scopes given. |
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* @throws TooManyScopesGiven When double scopes in the list. |
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*/ |
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private function assertValidScopes(array $scopes) |
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{ |
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$allowedScopes = array( |
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Scope::READ_PUBLIC, |
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Scope::WRITE_PUBLIC, |
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Scope::READ_RELATIONSHIPS, |
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Scope::WRITE_RELATIONSHIPS, |
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); |
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foreach ($scopes as $scope) { |
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if (!in_array($scope, $allowedScopes, true)) { |
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throw new InvalidScopeException($scope); |
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} |
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} |
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if (count($scopes) < 1) { |
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throw new AtLeastOneScopeNeeded(); |
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} |
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if (count($scopes) > count($allowedScopes)) { |
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throw new TooManyScopesGiven(); |
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} |
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} |
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/** |
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* Second step of the OAuth process. |
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* |
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* @param string $code The OAuth code, caught from the redirect page. |
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* |
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* @return string The OAuth access token. |
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* |
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* @throws TokenMissing |
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* @throws RateLimitedReached |
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*/ |
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public function requestAccessToken($code) |
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{ |
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$request = new Request( |
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'POST', |
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$this->getBaseUriWithVersion().'oauth/token', |
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array( |
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'grant_type' => 'authorization_code', |
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'client_id' => $this->clientId, |
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'client_secret' => $this->clientSecret, |
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'code' => (string) $code, |
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) |
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); |
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$response = $this->http->execute($request); |
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if ($response->rateLimited()) { |
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throw new RateLimitedReached($response); |
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} |
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if ( |
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!isset($response->body) |
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|| !isset($response->body->access_token) |
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) { |
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throw new TokenMissing(); |
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} |
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$this->accessToken = $response->body->access_token; |
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return $this->accessToken; |
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} |
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/** |
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* Executes a http request. |
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* |
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* @param Request $request The http request. |
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* |
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* @return Http\Response The http response. |
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*/ |
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public function execute(Request $request) |
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{ |
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$headers = $request->getHeaders(); |
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$headers['Authorization'] = sprintf('BEARER %s', $this->accessToken); |
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$authenticatedRequest = new Request( |
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$request->getMethod(), |
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$this->getBaseUriWithVersion().$request->getEndpoint(), |
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$request->getParams(), |
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$headers |
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); |
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return $this->http->execute($authenticatedRequest); |
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} |
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/** |
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* Returns the access token for persisting in some storage. |
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* |
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* @return string The OAuth access token. |
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*/ |
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public function getAccessToken() |
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{ |
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return $this->accessToken; |
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} |
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} |
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