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|
<?php
/**
* Copyright 2017 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\FacebookResumableUploader;
use Facebook\FileUpload\FacebookTransferChunk;
use Facebook\FileUpload\FacebookVideo;
use Facebook\GraphNodes\GraphEdge;
use Facebook\Url\UrlDetectionInterface;
use Facebook\Url\FacebookUrlDetectionHandler;
use Facebook\PseudoRandomString\PseudoRandomStringGeneratorFactory;
use Facebook\PseudoRandomString\PseudoRandomStringGeneratorInterface;
use Facebook\HttpClients\HttpClientsFactory;
use Facebook\PersistentData\PersistentDataFactory;
use Facebook\PersistentData\PersistentDataInterface;
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 = '5.6.1';
/**
* @const string Default Graph API version for requests.
*/
const DEFAULT_GRAPH_VERSION = 'v2.10';
/**
* @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 = [])
{
$config = array_merge([
'app_id' => getenv(static::APP_ID_ENV_NAME),
'app_secret' => getenv(static::APP_SECRET_ENV_NAME),
'default_graph_version' => static::DEFAULT_GRAPH_VERSION,
'enable_beta_mode' => false,
'http_client_handler' => null,
'persistent_data_handler' => null,
'pseudo_random_string_generator' => null,
'url_detection_handler' => null,
], $config);
if (!$config['app_id']) {
throw new FacebookSDKException('Required "app_id" key not supplied in config and could not find fallback environment variable "' . static::APP_ID_ENV_NAME . '"');
}
if (!$config['app_secret']) {
throw new FacebookSDKException('Required "app_secret" key not supplied in config and could not find fallback environment variable "' . static::APP_SECRET_ENV_NAME . '"');
}
$this->app = new FacebookApp($config['app_id'], $config['app_secret']);
$this->client = new FacebookClient(
HttpClientsFactory::createHttpClient($config['http_client_handler']),
$config['enable_beta_mode']
);
$this->pseudoRandomStringGenerator = PseudoRandomStringGeneratorFactory::createPseudoRandomStringGenerator(
$config['pseudo_random_string_generator']
);
$this->setUrlDetectionHandler($config['url_detection_handler'] ?: new FacebookUrlDetectionHandler());
$this->persistentDataHandler = PersistentDataFactory::createPersistentDataHandler(
$config['persistent_data_handler']
);
if (isset($config['default_access_token'])) {
$this->setDefaultAccessToken($config['default_access_token']);
}
// @todo v6: Throw an InvalidArgumentException if "default_graph_version" is not set
$this->defaultGraphVersion = $config['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()
{
return $this->urlDetectionHandler;
}
/**
* Changes the URL detection handler.
*
* @param UrlDetectionInterface $urlDetectionHandler
*/
private function setUrlDetectionHandler(UrlDetectionInterface $urlDetectionHandler)
{
$this->urlDetectionHandler = $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 an empty FacebookBatchRequest entity.
*
* @param AccessToken|string|null $accessToken The top-level access token. Requests with no access token
* will fallback to this.
* @param string|null $graphVersion The Graph API version to use.
* @return FacebookBatchRequest
*/
public function newBatchRequest($accessToken = null, $graphVersion = null)
{
$accessToken = $accessToken ?: $this->defaultAccessToken;
$graphVersion = $graphVersion ?: $this->defaultGraphVersion;
return new FacebookBatchRequest(
$this->app,
[],
$accessToken,
$graphVersion
);
}
/**
* 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);
}
/**
* Upload a video in chunks.
*
* @param int $target The id of the target node before the /videos edge.
* @param string $pathToFile The full path to the file.
* @param array $metadata The metadata associated with the video file.
* @param string|null $accessToken The access token.
* @param int $maxTransferTries The max times to retry a failed upload chunk.
* @param string|null $graphVersion The Graph API version to use.
*
* @return array
*
* @throws FacebookSDKException
*/
public function uploadVideo($target, $pathToFile, $metadata = [], $accessToken = null, $maxTransferTries = 5, $graphVersion = null)
{
$accessToken = $accessToken ?: $this->defaultAccessToken;
$graphVersion = $graphVersion ?: $this->defaultGraphVersion;
$uploader = new FacebookResumableUploader($this->app, $this->client, $accessToken, $graphVersion);
$endpoint = '/'.$target.'/videos';
$file = $this->videoToUpload($pathToFile);
$chunk = $uploader->start($endpoint, $file);
do {
$chunk = $this->maxTriesTransfer($uploader, $endpoint, $chunk, $maxTransferTries);
} while (!$chunk->isLastChunk());
return [
'video_id' => $chunk->getVideoId(),
'success' => $uploader->finish($endpoint, $chunk->getUploadSessionId(), $metadata),
];
}
/**
* Attempts to upload a chunk of a file in $retryCountdown tries.
*
* @param FacebookResumableUploader $uploader
* @param string $endpoint
* @param FacebookTransferChunk $chunk
* @param int $retryCountdown
*
* @return FacebookTransferChunk
*
* @throws FacebookSDKException
*/
private function maxTriesTransfer(FacebookResumableUploader $uploader, $endpoint, FacebookTransferChunk $chunk, $retryCountdown)
{
$newChunk = $uploader->transfer($endpoint, $chunk, $retryCountdown < 1);
if ($newChunk !== $chunk) {
return $newChunk;
}
$retryCountdown--;
// If transfer() returned the same chunk entity, the transfer failed but is resumable.
return $this->maxTriesTransfer($uploader, $endpoint, $chunk, $retryCountdown);
}
} |
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