* Facebook support

1 files changed, 589 insertions, 0 deletions

diff --git a/lib/facebook-graph-sdk/src/Facebook/Facebook.php b/lib/facebook-graph-sdk/src/Facebook/Facebook.php
new file mode 100644
index 0000000..227a166
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+++ b/lib/facebook-graph-sdk/src/Facebook/Facebook.php
@@ -0,0 +1,589 @@
+<?php
+/**
+ * Copyright 2014 Facebook, Inc.
+ *
+ * You are hereby granted a non-exclusive, worldwide, royalty-free license to
+ * use, copy, modify, and distribute this software in source code or binary
+ * form for use in connection with the web services and APIs provided by
+ * Facebook.
+ *
+ * As with any software that integrates with the Facebook platform, your use
+ * of this software is subject to the Facebook Developer Principles and
+ * Policies [http://developers.facebook.com/policy/]. This copyright notice
+ * shall be included in all copies or substantial portions of the software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ */
+namespace Facebook;
+
+use Facebook\Authentication\AccessToken;
+use Facebook\Authentication\OAuth2Client;
+use Facebook\FileUpload\FacebookFile;
+use Facebook\FileUpload\FacebookVideo;
+use Facebook\GraphNodes\GraphEdge;
+use Facebook\Url\UrlDetectionInterface;
+use Facebook\Url\FacebookUrlDetectionHandler;
+use Facebook\PseudoRandomString\PseudoRandomStringGeneratorInterface;
+use Facebook\PseudoRandomString\McryptPseudoRandomStringGenerator;
+use Facebook\PseudoRandomString\OpenSslPseudoRandomStringGenerator;
+use Facebook\PseudoRandomString\UrandomPseudoRandomStringGenerator;
+use Facebook\HttpClients\FacebookHttpClientInterface;
+use Facebook\HttpClients\FacebookCurlHttpClient;
+use Facebook\HttpClients\FacebookStreamHttpClient;
+use Facebook\HttpClients\FacebookGuzzleHttpClient;
+use Facebook\PersistentData\PersistentDataInterface;
+use Facebook\PersistentData\FacebookSessionPersistentDataHandler;
+use Facebook\PersistentData\FacebookMemoryPersistentDataHandler;
+use Facebook\Helpers\FacebookCanvasHelper;
+use Facebook\Helpers\FacebookJavaScriptHelper;
+use Facebook\Helpers\FacebookPageTabHelper;
+use Facebook\Helpers\FacebookRedirectLoginHelper;
+use Facebook\Exceptions\FacebookSDKException;
+
+/**
+ * Class Facebook
+ *
+ * @package Facebook
+ */
+class Facebook
+{
+    /**
+     * @const string Version number of the Facebook PHP SDK.
+     */
+    const VERSION = '5.0.0';
+
+    /**
+     * @const string Default Graph API version for requests.
+     */
+    const DEFAULT_GRAPH_VERSION = 'v2.4';
+
+    /**
+     * @const string The name of the environment variable that contains the app ID.
+     */
+    const APP_ID_ENV_NAME = 'FACEBOOK_APP_ID';
+
+    /**
+     * @const string The name of the environment variable that contains the app secret.
+     */
+    const APP_SECRET_ENV_NAME = 'FACEBOOK_APP_SECRET';
+
+    /**
+     * @var FacebookApp The FacebookApp entity.
+     */
+    protected $app;
+
+    /**
+     * @var FacebookClient The Facebook client service.
+     */
+    protected $client;
+
+    /**
+     * @var OAuth2Client The OAuth 2.0 client service.
+     */
+    protected $oAuth2Client;
+
+    /**
+     * @var UrlDetectionInterface|null The URL detection handler.
+     */
+    protected $urlDetectionHandler;
+
+    /**
+     * @var PseudoRandomStringGeneratorInterface|null The cryptographically secure pseudo-random string generator.
+     */
+    protected $pseudoRandomStringGenerator;
+
+    /**
+     * @var AccessToken|null The default access token to use with requests.
+     */
+    protected $defaultAccessToken;
+
+    /**
+     * @var string|null The default Graph version we want to use.
+     */
+    protected $defaultGraphVersion;
+
+    /**
+     * @var PersistentDataInterface|null The persistent data handler.
+     */
+    protected $persistentDataHandler;
+
+    /**
+     * @var FacebookResponse|FacebookBatchResponse|null Stores the last request made to Graph.
+     */
+    protected $lastResponse;
+
+    /**
+     * Instantiates a new Facebook super-class object.
+     *
+     * @param array $config
+     *
+     * @throws FacebookSDKException
+     */
+    public function __construct(array $config = [])
+    {
+        $appId = isset($config['app_id']) ? $config['app_id'] : getenv(static::APP_ID_ENV_NAME);
+        if (!$appId) {
+            throw new FacebookSDKException('Required "app_id" key not supplied in config and could not find fallback environment variable "' . static::APP_ID_ENV_NAME . '"');
+        }
+
+        $appSecret = isset($config['app_secret']) ? $config['app_secret'] : getenv(static::APP_SECRET_ENV_NAME);
+        if (!$appSecret) {
+            throw new FacebookSDKException('Required "app_secret" key not supplied in config and could not find fallback environment variable "' . static::APP_SECRET_ENV_NAME . '"');
+        }
+
+        $this->app = new FacebookApp($appId, $appSecret);
+
+        $httpClientHandler = null;
+        if (isset($config['http_client_handler'])) {
+            if ($config['http_client_handler'] instanceof FacebookHttpClientInterface) {
+                $httpClientHandler = $config['http_client_handler'];
+            } elseif ($config['http_client_handler'] === 'curl') {
+                $httpClientHandler = new FacebookCurlHttpClient();
+            } elseif ($config['http_client_handler'] === 'stream') {
+                $httpClientHandler = new FacebookStreamHttpClient();
+            } elseif ($config['http_client_handler'] === 'guzzle') {
+                $httpClientHandler = new FacebookGuzzleHttpClient();
+            } else {
+                throw new \InvalidArgumentException('The http_client_handler must be set to "curl", "stream", "guzzle", or be an instance of Facebook\HttpClients\FacebookHttpClientInterface');
+            }
+        }
+
+        $enableBeta = isset($config['enable_beta_mode']) && $config['enable_beta_mode'] === true;
+        $this->client = new FacebookClient($httpClientHandler, $enableBeta);
+
+        if (isset($config['url_detection_handler'])) {
+            if ($config['url_detection_handler'] instanceof UrlDetectionInterface) {
+                $this->urlDetectionHandler = $config['url_detection_handler'];
+            } else {
+                throw new \InvalidArgumentException('The url_detection_handler must be an instance of Facebook\Url\UrlDetectionInterface');
+            }
+        }
+
+        if (isset($config['pseudo_random_string_generator'])) {
+            if ($config['pseudo_random_string_generator'] instanceof PseudoRandomStringGeneratorInterface) {
+                $this->pseudoRandomStringGenerator = $config['pseudo_random_string_generator'];
+            } elseif ($config['pseudo_random_string_generator'] === 'mcrypt') {
+                $this->pseudoRandomStringGenerator = new McryptPseudoRandomStringGenerator();
+            } elseif ($config['pseudo_random_string_generator'] === 'openssl') {
+                $this->pseudoRandomStringGenerator = new OpenSslPseudoRandomStringGenerator();
+            } elseif ($config['pseudo_random_string_generator'] === 'urandom') {
+                $this->pseudoRandomStringGenerator = new UrandomPseudoRandomStringGenerator();
+            } else {
+                throw new \InvalidArgumentException('The pseudo_random_string_generator must be set to "mcrypt", "openssl", or "urandom", or be an instance of Facebook\PseudoRandomString\PseudoRandomStringGeneratorInterface');
+            }
+        }
+
+        if (isset($config['persistent_data_handler'])) {
+            if ($config['persistent_data_handler'] instanceof PersistentDataInterface) {
+                $this->persistentDataHandler = $config['persistent_data_handler'];
+            } elseif ($config['persistent_data_handler'] === 'session') {
+                $this->persistentDataHandler = new FacebookSessionPersistentDataHandler();
+            } elseif ($config['persistent_data_handler'] === 'memory') {
+                $this->persistentDataHandler = new FacebookMemoryPersistentDataHandler();
+            } else {
+                throw new \InvalidArgumentException('The persistent_data_handler must be set to "session", "memory", or be an instance of Facebook\PersistentData\PersistentDataInterface');
+            }
+        }
+
+        if (isset($config['default_access_token'])) {
+            $this->setDefaultAccessToken($config['default_access_token']);
+        }
+
+        if (isset($config['default_graph_version'])) {
+            $this->defaultGraphVersion = $config['default_graph_version'];
+        } else {
+            // @todo v6: Throw an InvalidArgumentException if "default_graph_version" is not set
+            $this->defaultGraphVersion = static::DEFAULT_GRAPH_VERSION;
+        }
+    }
+
+    /**
+     * Returns the FacebookApp entity.
+     *
+     * @return FacebookApp
+     */
+    public function getApp()
+    {
+        return $this->app;
+    }
+
+    /**
+     * Returns the FacebookClient service.
+     *
+     * @return FacebookClient
+     */
+    public function getClient()
+    {
+        return $this->client;
+    }
+
+    /**
+     * Returns the OAuth 2.0 client service.
+     *
+     * @return OAuth2Client
+     */
+    public function getOAuth2Client()
+    {
+        if (!$this->oAuth2Client instanceof OAuth2Client) {
+            $app = $this->getApp();
+            $client = $this->getClient();
+            $this->oAuth2Client = new OAuth2Client($app, $client, $this->defaultGraphVersion);
+        }
+
+        return $this->oAuth2Client;
+    }
+
+    /**
+     * Returns the last response returned from Graph.
+     *
+     * @return FacebookResponse|FacebookBatchResponse|null
+     */
+    public function getLastResponse()
+    {
+        return $this->lastResponse;
+    }
+
+    /**
+     * Returns the URL detection handler.
+     *
+     * @return UrlDetectionInterface
+     */
+    public function getUrlDetectionHandler()
+    {
+        if (!$this->urlDetectionHandler instanceof UrlDetectionInterface) {
+            $this->urlDetectionHandler = new FacebookUrlDetectionHandler();
+        }
+
+        return $this->urlDetectionHandler;
+    }
+
+    /**
+     * Returns the default AccessToken entity.
+     *
+     * @return AccessToken|null
+     */
+    public function getDefaultAccessToken()
+    {
+        return $this->defaultAccessToken;
+    }
+
+    /**
+     * Sets the default access token to use with requests.
+     *
+     * @param AccessToken|string $accessToken The access token to save.
+     *
+     * @throws \InvalidArgumentException
+     */
+    public function setDefaultAccessToken($accessToken)
+    {
+        if (is_string($accessToken)) {
+            $this->defaultAccessToken = new AccessToken($accessToken);
+
+            return;
+        }
+
+        if ($accessToken instanceof AccessToken) {
+            $this->defaultAccessToken = $accessToken;
+
+            return;
+        }
+
+        throw new \InvalidArgumentException('The default access token must be of type "string" or Facebook\AccessToken');
+    }
+
+    /**
+     * Returns the default Graph version.
+     *
+     * @return string
+     */
+    public function getDefaultGraphVersion()
+    {
+        return $this->defaultGraphVersion;
+    }
+
+    /**
+     * Returns the redirect login helper.
+     *
+     * @return FacebookRedirectLoginHelper
+     */
+    public function getRedirectLoginHelper()
+    {
+        return new FacebookRedirectLoginHelper(
+            $this->getOAuth2Client(),
+            $this->persistentDataHandler,
+            $this->urlDetectionHandler,
+            $this->pseudoRandomStringGenerator
+        );
+    }
+
+    /**
+     * Returns the JavaScript helper.
+     *
+     * @return FacebookJavaScriptHelper
+     */
+    public function getJavaScriptHelper()
+    {
+        return new FacebookJavaScriptHelper($this->app, $this->client, $this->defaultGraphVersion);
+    }
+
+    /**
+     * Returns the canvas helper.
+     *
+     * @return FacebookCanvasHelper
+     */
+    public function getCanvasHelper()
+    {
+        return new FacebookCanvasHelper($this->app, $this->client, $this->defaultGraphVersion);
+    }
+
+    /**
+     * Returns the page tab helper.
+     *
+     * @return FacebookPageTabHelper
+     */
+    public function getPageTabHelper()
+    {
+        return new FacebookPageTabHelper($this->app, $this->client, $this->defaultGraphVersion);
+    }
+
+    /**
+     * Sends a GET request to Graph and returns the result.
+     *
+     * @param string                  $endpoint
+     * @param AccessToken|string|null $accessToken
+     * @param string|null             $eTag
+     * @param string|null             $graphVersion
+     *
+     * @return FacebookResponse
+     *
+     * @throws FacebookSDKException
+     */
+    public function get($endpoint, $accessToken = null, $eTag = null, $graphVersion = null)
+    {
+        return $this->sendRequest(
+            'GET',
+            $endpoint,
+            $params = [],
+            $accessToken,
+            $eTag,
+            $graphVersion
+        );
+    }
+
+    /**
+     * Sends a POST request to Graph and returns the result.
+     *
+     * @param string                  $endpoint
+     * @param array                   $params
+     * @param AccessToken|string|null $accessToken
+     * @param string|null             $eTag
+     * @param string|null             $graphVersion
+     *
+     * @return FacebookResponse
+     *
+     * @throws FacebookSDKException
+     */
+    public function post($endpoint, array $params = [], $accessToken = null, $eTag = null, $graphVersion = null)
+    {
+        return $this->sendRequest(
+            'POST',
+            $endpoint,
+            $params,
+            $accessToken,
+            $eTag,
+            $graphVersion
+        );
+    }
+
+    /**
+     * Sends a DELETE request to Graph and returns the result.
+     *
+     * @param string                  $endpoint
+     * @param array                   $params
+     * @param AccessToken|string|null $accessToken
+     * @param string|null             $eTag
+     * @param string|null             $graphVersion
+     *
+     * @return FacebookResponse
+     *
+     * @throws FacebookSDKException
+     */
+    public function delete($endpoint, array $params = [], $accessToken = null, $eTag = null, $graphVersion = null)
+    {
+        return $this->sendRequest(
+            'DELETE',
+            $endpoint,
+            $params,
+            $accessToken,
+            $eTag,
+            $graphVersion
+        );
+    }
+
+    /**
+     * Sends a request to Graph for the next page of results.
+     *
+     * @param GraphEdge $graphEdge The GraphEdge to paginate over.
+     *
+     * @return GraphEdge|null
+     *
+     * @throws FacebookSDKException
+     */
+    public function next(GraphEdge $graphEdge)
+    {
+        return $this->getPaginationResults($graphEdge, 'next');
+    }
+
+    /**
+     * Sends a request to Graph for the previous page of results.
+     *
+     * @param GraphEdge $graphEdge The GraphEdge to paginate over.
+     *
+     * @return GraphEdge|null
+     *
+     * @throws FacebookSDKException
+     */
+    public function previous(GraphEdge $graphEdge)
+    {
+        return $this->getPaginationResults($graphEdge, 'previous');
+    }
+
+    /**
+     * Sends a request to Graph for the next page of results.
+     *
+     * @param GraphEdge $graphEdge The GraphEdge to paginate over.
+     * @param string    $direction The direction of the pagination: next|previous.
+     *
+     * @return GraphEdge|null
+     *
+     * @throws FacebookSDKException
+     */
+    public function getPaginationResults(GraphEdge $graphEdge, $direction)
+    {
+        $paginationRequest = $graphEdge->getPaginationRequest($direction);
+        if (!$paginationRequest) {
+            return null;
+        }
+
+        $this->lastResponse = $this->client->sendRequest($paginationRequest);
+
+        // Keep the same GraphNode subclass
+        $subClassName = $graphEdge->getSubClassName();
+        $graphEdge = $this->lastResponse->getGraphEdge($subClassName, false);
+
+        return count($graphEdge) > 0 ? $graphEdge : null;
+    }
+
+    /**
+     * Sends a request to Graph and returns the result.
+     *
+     * @param string                  $method
+     * @param string                  $endpoint
+     * @param array                   $params
+     * @param AccessToken|string|null $accessToken
+     * @param string|null             $eTag
+     * @param string|null             $graphVersion
+     *
+     * @return FacebookResponse
+     *
+     * @throws FacebookSDKException
+     */
+    public function sendRequest($method, $endpoint, array $params = [], $accessToken = null, $eTag = null, $graphVersion = null)
+    {
+        $accessToken = $accessToken ?: $this->defaultAccessToken;
+        $graphVersion = $graphVersion ?: $this->defaultGraphVersion;
+        $request = $this->request($method, $endpoint, $params, $accessToken, $eTag, $graphVersion);
+
+        return $this->lastResponse = $this->client->sendRequest($request);
+    }
+
+    /**
+     * Sends a batched request to Graph and returns the result.
+     *
+     * @param array                   $requests
+     * @param AccessToken|string|null $accessToken
+     * @param string|null             $graphVersion
+     *
+     * @return FacebookBatchResponse
+     *
+     * @throws FacebookSDKException
+     */
+    public function sendBatchRequest(array $requests, $accessToken = null, $graphVersion = null)
+    {
+        $accessToken = $accessToken ?: $this->defaultAccessToken;
+        $graphVersion = $graphVersion ?: $this->defaultGraphVersion;
+        $batchRequest = new FacebookBatchRequest(
+            $this->app,
+            $requests,
+            $accessToken,
+            $graphVersion
+        );
+
+        return $this->lastResponse = $this->client->sendBatchRequest($batchRequest);
+    }
+
+    /**
+     * Instantiates a new FacebookRequest entity.
+     *
+     * @param string                  $method
+     * @param string                  $endpoint
+     * @param array                   $params
+     * @param AccessToken|string|null $accessToken
+     * @param string|null             $eTag
+     * @param string|null             $graphVersion
+     *
+     * @return FacebookRequest
+     *
+     * @throws FacebookSDKException
+     */
+    public function request($method, $endpoint, array $params = [], $accessToken = null, $eTag = null, $graphVersion = null)
+    {
+        $accessToken = $accessToken ?: $this->defaultAccessToken;
+        $graphVersion = $graphVersion ?: $this->defaultGraphVersion;
+
+        return new FacebookRequest(
+            $this->app,
+            $accessToken,
+            $method,
+            $endpoint,
+            $params,
+            $eTag,
+            $graphVersion
+        );
+    }
+
+    /**
+     * Factory to create FacebookFile's.
+     *
+     * @param string $pathToFile
+     *
+     * @return FacebookFile
+     *
+     * @throws FacebookSDKException
+     */
+    public function fileToUpload($pathToFile)
+    {
+        return new FacebookFile($pathToFile);
+    }
+
+    /**
+     * Factory to create FacebookVideo's.
+     *
+     * @param string $pathToFile
+     *
+     * @return FacebookVideo
+     *
+     * @throws FacebookSDKException
+     */
+    public function videoToUpload($pathToFile)
+    {
+        return new FacebookVideo($pathToFile);
+    }
+}