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<?php |
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namespace Haridarshan\Instagram; |
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use Haridarshan\Instagram\Constants; |
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use Haridarshan\Instagram\Exceptions\InstagramRequestException; |
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use Haridarshan\Instagram\Exceptions\InstagramResponseException; |
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use Haridarshan\Instagram\Exceptions\InstagramThrottleException; |
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use Haridarshan\Instagram\HelperFactory; |
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use Haridarshan\Instagram\Instagram; |
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use Haridarshan\Instagram\InstagramResponse; |
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class InstagramRequest |
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{ |
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/** @var string $path */ |
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private $path; |
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/** @var array $params */ |
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private $params; |
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/** @var string $method */ |
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private $method; |
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/* |
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* Remaining Rate Limit |
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* Sandbox = 500 |
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* Live = 5000 |
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* @var array $x_rate_limit_remaining |
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*/ |
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private $xRateLimitRemaining = 500; |
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/** @var InstagramResponse $response */ |
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protected $response; |
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/** @var Instagram $instagram */ |
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protected $instagram; |
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/* |
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* Create the request and execute it to get the response |
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* @param Instagram $instagram |
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* @param string $path |
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* @param array $params |
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* @param string $method |
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*/ |
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public function __construct(Instagram $instagram, $path, array $params = array(), $method = 'GET') |
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{ |
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$this->instagram = $instagram; |
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$this->path = $path; |
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$this->params = $params; |
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$this->method = $method; |
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} |
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/* |
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* Execute the Instagram Request |
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* @param void |
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* @return InstagramResponse |
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*/ |
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protected function execute() |
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{ |
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$this->isRateLimitReached(); |
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$this->isAccessTokenPresent(); |
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$oauth = $this->instagram->getOAuth(); |
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if (!$oauth->isAccessTokenSet()) { |
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$oauth->setAccessToken($this->params['access_token']); |
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} |
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$authentication_method = '?access_token='.$this->params['access_token']; |
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$endpoint = Constants::API_VERSION.$this->path.(('GET' === $this->method) ? '?'.http_build_query($this->params) : $authentication_method); |
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$endpoint .= (strstr($endpoint, '?') ? '&' : '?').'sig='.static::generateSignature($this->instagram->getClientSecret(), $this->path, $this->params); |
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$request = HelperFactory::request($this->instagram->getHttpClient(), $endpoint, $this->params, $this->method); |
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if ($request != null) { |
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$this->response = new InstagramResponse($request); |
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$this->xRateLimitRemaining = $this->response->getHeader('X-Ratelimit-Remaining'); |
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} else { |
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throw new InstagramResponseException("400 Bad Request: instanceof InstagramResponse cannot be null", 400); |
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} |
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} |
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/* |
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* Check Access Token is present. If not throw InstagramRequestException |
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* @throws InstagramRequestException |
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*/ |
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protected function isAccessTokenPresent() |
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{ |
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if (!isset($this->params['access_token'])) { |
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throw new InstagramRequestException("{$this->path} - api requires an authenticated users access token.", 400); |
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} |
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} |
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/* |
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* Get Response |
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* @return InstagramResponse |
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*/ |
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public function getResponse() |
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{ |
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$this->execute(); |
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return $this->response; |
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} |
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/* |
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* Check whether api rate limit is reached or not |
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* @throws InstagramThrottleException |
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*/ |
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private function isRateLimitReached() |
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{ |
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if (!$this->getRateLimit()) { |
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throw new InstagramThrottleException("400 Bad Request : You have reached Instagram API Rate Limit", 400); |
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} |
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} |
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/* |
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* Secure API Request by using endpoint, paramters and API secret |
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* copy from Instagram API Documentation: https://www.instagram.com/developer/secure-api-requests/ |
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* |
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* @param string $secret |
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* @param string $endpoint |
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* @param array $params |
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* |
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* @return string (Signature) |
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*/ |
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public static function generateSignature($secret, $endpoint, $params) |
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{ |
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$signature = $endpoint; |
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ksort($params); |
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foreach ($params as $key => $value) { |
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$signature .= "|$key=$value"; |
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} |
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return hash_hmac('sha256', $signature, $secret, false); |
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} |
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/* |
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* @return int |
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*/ |
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public function getRateLimit() |
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{ |
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return $this->xRateLimitRemaining; |
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} |
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} |
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haridarshan /
instagram-php
