dbs_share_count.php

<?php
/**
* Builds Share URLS and gets social count of urls from the top social media platforms.
* This also uses WordPress Transients to cache the social media API requests.
* For more information on WordPress Transients visit: https://codex.wordpress.org/Transients_API
*
* @author	DBS>Interactive - 2015-07-08
* @license CC BY-SA 4.0 - http://creativecommons.org/licenses/by-sa/4.0/ - DBS>Interactive
* @example
*
* // require this php file in Functions.php
*
* // Instantiate new DBSShareCount class and pass it the required options.
* $options = array(
*		"share_url" => WP_SITEURL . $_SERVER['REQUEST_URI'], // REQUIRED
*		"share_title" => get_the_title() . " at @the_most_awesome_company", // Optional
*		"share_text" => "Check out " . get_the_title() . " @the_most_awesome_company", // Optional
*		"twitter_summary" => "Check out " . get_the_title() . " @the_most_awesome_company", // Optional
*		"media_url" => $share_media, // Optional
*		"timeout" => 4 // Optional
* );
*
* $sharecount = new DBSShareCount( $options );
*
*
* // IN YOUR TEMPLATE FILES
* <li class="facebook">
*		 <a href="<?php echo $sharecount->get_share_url('facebook'); ?>" title="Share on Facebook">
*				 Like <span class="count"><?php echo $sharecount->get_count('likes'); ?></span>
*		 </a>
* </li>
*/

class DBSShareCount {

	private $url,
		$timeout,
		$share_url,
		$share_title,
		$share_text,
		$twitter_summary,
		$media_url;

	private $defaults = array(
		"share_url" => "",
		"media_url" => "",
		"share_title" => "",
		"share_text" => "",
		"twitter_summary" => "",
		"timeout" => 4 // in hours.
	);

	function __construct( $options = array() ){
		$options = array_merge( $options, $this->defaults );

		if( empty($options["share_url"] ) ) {
			$options["share_url"] = $this->default_share_url();
		}

		$this->share_title = rawurlencode( $options["share_title"] );
		$this->share_text = rawurlencode( $options["share_text"] );
		$this->twitter_summary = rawurlencode( $options["twitter_summary"] );
		$this->url = rawurlencode( $options["share_url"] );
		$this->media_url = $options["media_url"] ;
		$this->timeout = $options["timeout"];
	}

	/**
	* Returns the current page's url
	*
	* @return string page's URL
	*/
	private function default_share_url(){
		$server = $_SERVER;
		$protocol = 'http';
		$port = $server['SERVER_PORT'];
		$url = $server['REQUEST_URI'];

		if( !empty( $server['HTTPS'] ) && $server['HTTPS'] == 'on' ) {
			$protocol = 'https';
		}
		if( ( $port == '80' ) || ( $port=='443' && $protocol == 'https' ) ) {
			$port = '';
		}

		return $protocol . "://" . $host . $port . $url;
	}

	/**
	* Return the appropriate share URL
	*
	* @param string $platform
	* @return string Share URL
	*/
	public function get_share_url($platform){
		switch ($platform) {
			case "facebook":
				return "https://www.facebook.com/sharer/sharer.php?s=100&p[url]=" . $this->url . "&p[images][0]=" . $this->media_url . "&p[title]=" . $this->share_title . "&p[summary]=" . $this->share_text;

			case "twitter":
				return "http://twitter.com/share?url=" . $this->url . "&text=" . $this->twitter_summary;

			case "google":
				return "https://plusone.google.com/_/+1/confirm?hl=en&url=" . $this->url;

			case "pinterest":
				return "http://pinterest.com/pin/create/button/?url=" . $this->url . "&media=" . $this->media_url . "&description=" . $this->share_text;

			case "linkedin":
				return "https://www.linkedin.com/shareArticle?mini=true&url=" . $this->url . "&title=" . $this->share_title . "&summary=" . $this->share_text;

			case "mail":
				return "mailto:?&subject=" . $this->share_title . "&body=" . $this->share_text;

			default:
				return "!! Platform Not Found !!";
		}
	}

	/**
	* Calls the appropriate function by type of shares
	*
	* @param string $type
	* @return [type]			 [description]
	*/
	public function get_count($type){
		switch ($type){
			case "tweets":
				return $this->get_twitter();

			case "likes":
				return $this->get_fb_likes();

			case "shares":
				return $this->get_fb_shares();

			case "plusones":
				return $this->get_plusones();

			case "pins":
				return $this->get_pinterest();

			default:
				return "!! Count Platform Not Found !!";
		}
	}


	/**
	* Gets Facebook Like count
	* @return int Share Count Number
	*/
	private function get_fb_likes() {
		if( $this->is_transient("fb_likes") ){
			$this->dbs_get_transient("fb_likes");

			return isset( $json[0]['like_count'] ) ? intval( $json[0]['like_count'] ) : 0;
		} else {
			$json_string = $this->file_get_contents_curl('http://api.facebook.com/restserver.php?method=links.getStats&format=json&urls='.$this->url);
			$json = json_decode($json_string, true);
			$this->store_transient("fb_likes");

			return isset( $json[0]['like_count'] ) ? intval($json[0]['like_count']) : 0;
		}
	}

	/**
	* Gets Facebook Share count
	* @return int Share Count Number
	*/
	private function get_fb_shares() {
		if( $this->is_transient("fb_shares") ){
			$data = $this->dbs_get_transient("fb_shares");

			return isset($json[0]['share_count'])?intval($json[0]['share_count']):0;
		} else {
			$json_string = $this->file_get_contents_curl('http://api.facebook.com/restserver.php?method=links.getStats&format=json&urls='.$this->url);
			$json = json_decode($json_string, true);
			$this->store_transient("fb_shares");

			return isset( $json[0]['share_count'] ) ? intval( $json[0]['share_count'] ) : 0;
		}
	}

	/**
	* Gets Google Plus +1 count
	* @return int Share Count Number
	*/
	private function get_plusones()	{
		if( $this->is_transient("plusones") ){
			$data = $this->dbs_get_transient("plusones");

			return isset( $json[0]['result']['metadata']['globalCounts']['count'] ) ? intval( $json[0]['result']['metadata']['globalCounts']['count'] ) : 0;
		} else {
			$curl = curl_init();
			curl_setopt( $curl, CURLOPT_URL, "https://clients6.google.com/rpc" );
			curl_setopt( $curl, CURLOPT_POST, true );
			curl_setopt( $curl, CURLOPT_SSL_VERIFYPEER, false );
			curl_setopt( $curl, CURLOPT_POSTFIELDS, '[{"method":"pos.plusones.get","id":"p","params":{"nolog":true,"id":"'.rawurldecode( $this->url ).'","source":"widget","userId":"@viewer","groupId":"@self"},"jsonrpc":"2.0","key":"p","apiVersion":"v1"}]' );
			curl_setopt( $curl, CURLOPT_RETURNTRANSFER, true );
			curl_setopt( $curl, CURLOPT_HTTPHEADER, array('Content-type: application/json') );
			$curl_results = curl_exec ($curl);
			curl_close ($curl);
			$json = json_decode($curl_results, true);
			$this->store_transient("plusones");

			return isset( $json[0]['result']['metadata']['globalCounts']['count'] ) ? intval( $json[0]['result']['metadata']['globalCounts']['count'] ) : 0;
		}
	}

	/**
	* Gets Pinterest Share count
	* @return int Share Count Number
	*/
	private function get_pinterest() {
		if( $this->is_transient("pinterest") ){
			$data = $this->dbs_get_transient("pinterest");

			return isset( $data['count'] ) ? intval( $data['count'] ) : 0;
		} else {
			$return_data = $this->file_get_contents_curl('http://api.pinterest.com/v1/urls/count.json?url='.$this->url);
			$json_string = preg_replace('/^receiveCount((.*))$/', "\1", $return_data);
			$json = json_decode( $json_string, true );
			$this->store_transient("pinterest", $json);

			return isset( $json['count'] ) ? intval( $json['count'] ) : 0;
		}
	}

	/**
	* Stores social count data using WP_Transients. Sets cache for $this->timeout * Hours.
	* @param	"String" $social_platform Social media platform reference
	* @param	"String" $data						Social count data
	*/
	private function store_transient( $social_platform, $data ) {
		$url_platform = $this->url . $social_platform;
		$trans_url = get_transient( $url_platform );
		set_transient( $url_platform, $data , $this->timeout * HOUR_IN_SECONDS );
	}

	/**
	* Checks to see if a certain WP_Transient exists.
	* @param	String	$social_platform Social media platform reference
	* @return boolean					True if the transient exists.
	*/
	private function is_transient( $social_platform ) {
		$url_platform = $this->url . $social_platform;
		$trans_url = get_transient( $url_platform );
		return ( false === $trans_url ) ? false : true;
	}

	/**
	* Pulls the transient data
	* @param	String	$social_platform Social media platform reference
	* @return array								Transient Data
	*/
	private function dbs_get_transient( $social_platform ){
		$url_platform = $this->url . $social_platform;
		return get_transient( $url_platform );
	}

	/**
	* Initiates an HTTP request for information
	* @param	String $url The request url
	* @return String 		 The response data
	*/
	private function file_get_contents_curl( $url ){
		$ch = curl_init();
		curl_setopt( $ch, CURLOPT_URL, $url );
		curl_setopt( $ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT'] );
		curl_setopt( $ch, CURLOPT_FAILONERROR, 1 );
		curl_setopt( $ch, CURLOPT_FOLLOWLOCATION, 1 );
		curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 );
		curl_setopt( $ch, CURLOPT_TIMEOUT, 8 ); // Timeout after 8 seconds. Prevents your page from white screen of terror.
		$cont = curl_exec( $ch );

		if( curl_error( $ch ) || empty( $cont ) ) {
			error_log( 'Share Count: ' . curl_error($ch) );
			return '';
		}

		return $cont;
	}

}