<?php
function introText($page){
	if(!empty($page['introtext'])){
		$html = $page['introtext'];
	}
	else{
		$html = '<div class="white">';
 		$html .= $page['pagetitle'];
        $html .= '</div>';
	}
	return $html;
}
/*/https://www.facebook.com/feeds/page.php rss feed
	*Valid formats json
/*/
function getPageFeed($fbid=0,$format='json'){
	//Facebook url for retriving feeds
	$url = 'https://www.facebook.com/feeds/page.php?id='.$fbid.'&format='.$format;
	//Init curl
	$c = curl_init();
	//CURL vars
	$header[0] = 'Accept: text/xml,application/xml,application/xhtml+xml,';
	$header[0] .= 'text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5';
	$header[] = 'Cache-Control: max-age=0';
	$header[] = 'Connection: keep-alive';
	$header[] = 'Keep-Alive: 300';
	$header[] = 'Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7';
	$header[] = 'Accept-Language: en-us,en;q=0.5';
	$header[] = 'Pragma: ';

	$userAgent = 'Mozilla';
	curl_setopt($c, CURLOPT_USERAGENT, $userAgent);
	curl_setopt($c, CURLOPT_URL,$url);
	curl_setopt($c, CURLOPT_FAILONERROR, true);
	curl_setopt($c, CURLOPT_FOLLOWLOCATION, true);
	curl_setopt($c, CURLOPT_HTTPHEADER, $header);
	curl_setopt($c, CURLOPT_REFERER, '');
	curl_setopt($c, CURLOPT_ENCODING, 'gzip,deflate');
	curl_setopt($c, CURLOPT_AUTOREFERER, true);
	curl_setopt($c, CURLOPT_RETURNTRANSFER,true);
	curl_setopt($c, CURLOPT_VERBOSE, false);     
    curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
	curl_setopt($c, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($c, CURLOPT_SSL_VERIFYHOST, false);
	curl_setopt($c, CURLOPT_TIMEOUT, 10);
	
	$feed = curl_exec($c);
	
switch ($format) {
	case 'json':
		$feed_decoded=json_decode($feed,true);
 		$page_feed = $feed_decoded['entries'];
		break;
	
	default:
		$feed_decoded=json_decode($feed,true);
 		$page_feed = $feed_decoded['entries'];
		break;
}

    //close the connection
    curl_close($c);
     
    //return the data as an object
    return $page_feed;

}

/*/Facebook Graph API
	*function to retrieve posts from facebook's server Graph API 
	*Need to provide TOKEN and page ID in config.php
/*/
function getPagePosts($fbid=0,$fbtoken=0,$limit=20){
	// this is the URL that gets the data from facebook
	// the ?limit=20 tells facebook how many posts we want
	
	//must be https when using an access token
	$url="https://graph.facebook.com/v2.2/".$fbid."?access_token=".$fbtoken."&fields=posts.limit(".$limit."){full_picture,picture,message,link}";
	//load and setup CURL
	$c = curl_init($url);
	curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
	curl_setopt($c, CURLOPT_SSL_VERIFYPEER, false);
	curl_setopt($c, CURLOPT_SSL_VERIFYHOST, false);			
	//get data from facebook and decode JSON
	$page = json_decode(curl_exec($c));
	$feed = curl_exec($c);
	$feed_decoded=json_decode($feed,true);
 	$page_feed = $feed_decoded['posts']['data'];
	//close the connection
	curl_close($c);
	//return the data as an object
	return $page_feed;
}