Add Google authentication

vendor/OAuth/OAuth2/Service/Mailchimp.php

@@ -0,0 +1,115 @@
+<?php
+
+namespace OAuth\OAuth2\Service;
+
+use OAuth\OAuth2\Token\StdOAuth2Token;
+use OAuth\Common\Http\Exception\TokenResponseException;
+use OAuth\Common\Http\Uri\Uri;
+use OAuth\Common\Consumer\CredentialsInterface;
+use OAuth\Common\Http\Client\ClientInterface;
+use OAuth\Common\Storage\TokenStorageInterface;
+use OAuth\Common\Http\Uri\UriInterface;
+
+class Mailchimp extends AbstractService
+{
+
+    public function __construct(
+        CredentialsInterface $credentials,
+        ClientInterface $httpClient,
+        TokenStorageInterface $storage,
+        $scopes = array(),
+        UriInterface $baseApiUri = null
+    ) {
+        parent::__construct($credentials, $httpClient, $storage, $scopes, $baseApiUri);
+
+        if (is_null($this->baseApiUri) && $storage->hasAccessToken($this->service())) {
+            $this->setBaseApiUri($storage->retrieveAccessToken($this->service()));
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function getAuthorizationMethod()
+    {
+        return static::AUTHORIZATION_METHOD_QUERY_STRING_V3;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getAuthorizationEndpoint()
+    {
+        return new Uri('https://login.mailchimp.com/oauth2/authorize');
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getAccessTokenEndpoint()
+    {
+        return new Uri('https://login.mailchimp.com/oauth2/token');
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function parseAccessTokenResponse($responseBody)
+    {
+        // Parse JSON
+        $data = json_decode($responseBody, true);
+
+        // Do validation.
+        if (null === $data || !is_array($data)) {
+            throw new TokenResponseException('Unable to parse response.');
+        } elseif (isset($data['error'])) {
+            throw new TokenResponseException('Error in retrieving token: "' . $data['error'] . '"');
+        }
+
+        // Create token object.
+        $token = new StdOAuth2Token($data['access_token']);
+
+        // Set the right API endpoint.
+        $this->setBaseApiUri($token);
+
+        // Mailchimp tokens evidently never expire...
+        $token->setEndOfLife(StdOAuth2Token::EOL_NEVER_EXPIRES);
+
+        return $token;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function request($path, $method = 'GET', $body = null, array $extraHeaders = array())
+    {
+        if (is_null($this->baseApiUri)) {
+            $this->setBaseApiUri($this->storage->retrieveAccessToken($this->service()));
+        }
+
+        return parent::request($path, $method, $body, $extraHeaders);
+    }
+
+    /**
+     * Set the right base endpoint.
+     * 
+     * @param StdOAuth2Token $token
+     */
+    protected function setBaseApiUri(StdOAuth2Token $token)
+    {
+        // Make request uri.
+        $endpoint = 'https://login.mailchimp.com/oauth2/metadata?oauth_token='. $token->getAccessToken();
+
+        // Grab meta data about the token.
+        $response = $this->httpClient->retrieveResponse(new Uri($endpoint), array(), array(), 'GET');
+
+        // Parse JSON.
+        $meta = json_decode($response, true);
+
+        // Set base api uri.
+        $this->baseApiUri = new Uri('https://'. $meta['dc'] .'.api.mailchimp.com/2.0/');
+
+        // Allow chaining.
+        return $this;
+    }
+}