1<?php
2
3namespace OAuth\OAuth2\Service;
4
5use OAuth\OAuth2\Token\StdOAuth2Token;
6use OAuth\Common\Http\Exception\TokenResponseException;
7use OAuth\Common\Http\Uri\Uri;
8use OAuth\Common\Consumer\CredentialsInterface;
9use OAuth\Common\Http\Uri\UriInterface;
10use OAuth\Common\Storage\TokenStorageInterface;
11use OAuth\Common\Http\Client\ClientInterface;
12
13/**
14 * Buffer API.
15 * @author  Sumukh Sridhara <@sumukhsridhara>
16 * @link https://bufferapp.com/developers/api
17 */
18class Buffer extends AbstractService
19{
20    public function __construct(
21        CredentialsInterface $credentials,
22        ClientInterface $httpClient,
23        TokenStorageInterface $storage,
24        $scopes = array(),
25        UriInterface $baseApiUri = null
26    ) {
27        parent::__construct($credentials, $httpClient, $storage, $scopes, $baseApiUri);
28        if ($baseApiUri === null) {
29            $this->baseApiUri = new Uri('https://api.bufferapp.com/1/');
30        }
31    }
32
33    /**
34     * {@inheritdoc}
35     */
36    public function getAuthorizationEndpoint()
37    {
38        return new Uri('https://bufferapp.com/oauth2/authorize');
39    }
40
41    /**
42     * {@inheritdoc}
43     */
44    public function getAccessTokenEndpoint()
45    {
46        return new Uri('https://api.bufferapp.com/1/oauth2/token.json');
47    }
48
49    /**
50     * {@inheritdoc}
51     */
52    protected function getAuthorizationMethod()
53    {
54        return static::AUTHORIZATION_METHOD_QUERY_STRING;
55    }
56
57    /**
58     * {@inheritdoc}
59     */
60    public function getAuthorizationUri(array $additionalParameters = array())
61    {
62        $parameters = array_merge(
63            $additionalParameters,
64            array(
65                'client_id'     => $this->credentials->getConsumerId(),
66                'redirect_uri'  => $this->credentials->getCallbackUrl(),
67                'response_type' => 'code',
68            )
69        );
70
71        // Build the url
72        $url = clone $this->getAuthorizationEndpoint();
73        foreach ($parameters as $key => $val) {
74            $url->addToQuery($key, $val);
75        }
76
77        return $url;
78    }
79
80    /**
81     * {@inheritdoc}
82     */
83    public function requestRequestToken()
84    {
85        $responseBody = $this->httpClient->retrieveResponse(
86            $this->getRequestTokenEndpoint(),
87            array(
88                'client_key' => $this->credentials->getConsumerId(),
89                'redirect_uri' => $this->credentials->getCallbackUrl(),
90                'response_type' => 'code',
91            )
92        );
93
94        $code = $this->parseRequestTokenResponse($responseBody);
95
96        return $code;
97    }
98
99    protected function parseRequestTokenResponse($responseBody)
100    {
101        parse_str($responseBody, $data);
102
103        if (null === $data || !is_array($data)) {
104            throw new TokenResponseException('Unable to parse response.');
105        } elseif (!isset($data['code'])) {
106            throw new TokenResponseException('Error in retrieving code.');
107        }
108        return $data['code'];
109    }
110
111    public function requestAccessToken($code, $state = null)
112    {
113        $bodyParams = array(
114            'client_id'     => $this->credentials->getConsumerId(),
115            'client_secret' => $this->credentials->getConsumerSecret(),
116            'redirect_uri' => $this->credentials->getCallbackUrl(),
117            'code'          => $code,
118            'grant_type'    => 'authorization_code',
119        );
120
121        $responseBody = $this->httpClient->retrieveResponse(
122            $this->getAccessTokenEndpoint(),
123            $bodyParams,
124            $this->getExtraOAuthHeaders()
125        );
126        $token = $this->parseAccessTokenResponse($responseBody);
127        $this->storage->storeAccessToken($this->service(), $token);
128
129        return $token;
130    }
131
132    protected function parseAccessTokenResponse($responseBody)
133    {
134        $data = json_decode($responseBody, true);
135
136        if ($data === null || !is_array($data)) {
137            throw new TokenResponseException('Unable to parse response.');
138        } elseif (isset($data['error'])) {
139            throw new TokenResponseException('Error in retrieving token: "' . $data['error'] . '"');
140        }
141
142        $token = new StdOAuth2Token();
143        $token->setAccessToken($data['access_token']);
144
145        $token->setEndOfLife(StdOAuth2Token::EOL_NEVER_EXPIRES);
146        unset($data['access_token']);
147        $token->setExtraParams($data);
148
149        return $token;
150    }
151}
152