<?php

class SlideShare {
	private $key;
	private $secret;
	private $apiurl;

	public function __construct() {
		$this->key = SLIDESHARE_KEY;
		$this->secret = SLIDESHARE_SECRET;
		$this->apiurl = 'https://www.slideshare.net/api/2';
	}

	public function get_slideshow($url) {
		$ts = time();
		$hash = sha1($this->secret.$ts);
		$request_url = $this->apiurl."/get_slideshow?api_key={$this->key}&ts={$ts}&hash={$hash}&slideshow_url={$url}&detailed=1";
		$ch = curl_init($request_url);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
		$data = curl_exec($ch);
		$httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
		curl_close($ch);

		if ($httpcode == 200) {
			$xml = new SimpleXMLElement($data);
			$json = json_decode(json_encode($xml));
			if (isset($json->ID)) {
				return $json;
			}
			return false;
		}
		return false;
	}
}