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<?php
/**
* Copyright © 2018 Porto. All rights reserved.
*/
namespace Smartwave\Socialfeeds\Helper;

class Data extends \Magento\Framework\App\Helper\AbstractHelper
{
    public function __construct(
        \Magento\Framework\App\Helper\Context $context
    ) {
        parent::__construct($context);
    }
    public function getConfig($config_path)
    {
        return $this->scopeConfig->getValue(
            $config_path,
            \Magento\Store\Model\ScopeInterface::SCOPE_STORE
        );
    }

    public function file_get_contents_curl($url, $useragent = null) {
        $ch = curl_init($url);
        
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        if ($useragent)
            curl_setopt($ch, CURLOPT_USERAGENT, $useragent);
        curl_setopt( $ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
        
        $data = curl_exec($ch);
        curl_close($ch);
        return $data;
    }
        
    function getAttribute($attrib, $tag){
          //get attribute from html tag
          $re = '/'.$attrib.'=["\']?([^"\' ]*)["\' ]/is';
          preg_match($re, $tag, $match);
          
          if($match){
            return urldecode($match[1]);
          }else {
            return false;
          }
    }
    
    function fetch_fb_fans($fb_id, $limit = 10){
        $ret = array();
        $matches = array();
        $url = 'https://www.facebook.com/plugins/likebox.php?href=https://www.facebook.com/' . $fb_id . '&connections=' . $limit;
        
        $html = '';
        $like_html = $this->file_get_contents_curl($url, 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:15.0) Gecko/20100101 Firefox/15.0.1');
        $doc = new \DOMDocument('1.0', 'utf-8');
        @$doc->loadHTML('<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />' . $like_html);
        $peopleList = array();
        $i = 0;

        if (!$doc)
            return false;

        $result = array();
        $link = $doc->getElementById('u_0_4');
        $result['link'] = 'https://www.facebook.com/'.$fb_id;
        $result['like'] = '';
        if (isset($link)) {
            foreach ($link->childNodes as $child) {
                $result['like'] .= $link->ownerDocument->saveHTML($child);
            } 
        }

        foreach ($doc->getElementsByTagName('ul')->item(0)->childNodes as $child) {
            $raw = $doc->saveXML($child);
            $li = preg_replace("/<li[^>]+\>/i", "", $raw);
            $peopleList[$i] = preg_replace("/<\/li>/i", "", $li);
            $i++;
        }
        $fb = $this->getConfig("sw_socialfeeds/facebook_fanbox");
        $persons = 0;
        foreach ($peopleList as $key => $code) {
            if($fb['showing_counts'] && $persons >= $fb['showing_counts'])
                continue;
            $name = $this->getAttribute('title', $code);
            $nm = substr($name, 0, 7);
            //print_r(strlen($nm));echo "\n";
            if (strlen($nm) != strlen($name)) $nm = $nm."...";

            $image = $this->getAttribute('src', $code);
            $link = $this->getAttribute('href', $code);

            //$data = file_get_contents($image);
            //$img_in_base64 = 'data:image/jpg;base64,' . base64_encode($data);
            $protocols = array("http:","https:"); 
            $img_in_base64 = str_replace($protocols, "", $image);

            $html .= '<div class="fb-person">';
            if ($link != "") {
                $html .= "<a href=\"".$link."\" title=\"".$name."\" target=\"_blank\"><img src=\"".$img_in_base64."\" alt=\"\" /></a>";
            } else {
                $html .= "<span title=\"".$name."\"><img src=\"".$img_in_base64."\" alt=\"\" /></span>";
            }
            $html .= $name.'</div>';
            $persons ++;
        }
        $result['fans'] = $html;
        return $result;
    }
    
    // get facebook fans
    public function getFBFans() {
        $fb = $this->getConfig("sw_socialfeeds/facebook_fanbox");
        
        if (!$fb['enable'])
            return false;
            
        $limit = $fb['showing_counts'];
        $fb_name = $fb['facebook_name'];
        
        // get page info from graph
        return $this->fetch_fb_fans($fb_name, $limit);
    }
}