<?php 

global $id, $img, $gallery_id, $metadata, $other_albums, $count, $data_array, $anchor, $dir_path, $device, $smart_array, $image_tag_array;

?>
<?php 

$pageURL = (@$_SERVER["HTTPS"] == "on") ? "https://" : "http://";
if ($_SERVER["SERVER_PORT"] != "80")
{
    $pageURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
} 
else 
{
    $pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
}

//var_dump($data_array['images'][0]['full']);
global $options;
$options['empty']=false;
$options['cache']=60*60*24;
$options['expired']=true;
$options['empty']==true;




$options['file'] = 'previews/'.$id.'.jpg';


$pos=strpos($pageURL,'share');
$pageURL=substr($pageURL,0,$pos);



$options['url']= $pageURL.$options['file'];
$options['image_url']= $data_array['images'][0]['full'];



$data_array['google']=$options['datasource'] = $pageURL.'previews/'.$id.'.jpg';


$options['datasource'] = str_replace('\\','/',$options['datasource']);
//var_dump($options);
if ( !is_file($options['file']) ){
//   echo'write new file, as does not exist<br/>';
$options['empty']=true;
//write_file_with_string($options);
}// only write album if different name or doesn't exist yet
else {
//   echo'file exzists<br/>';
check_if_file_is_good($options);// is it expired, is it empty?
}

if($options['empty']==true||$options['expired']==true){

write_preview_file($options);
//   echo 'the file is not empty so...we wrote one<br/>';

}else{
//   echo 'file was good, so just show the old one!!!!<br/>';
}


function check_if_file_is_good($options){
 check_file_age($options);
check_file_size($options);
}



function check_file_size($options){
global $do_new_file, $options;
$director='';
$director=@file_get_contents($options['url']);
////   echo '<br/><br/><br/>'.strlen($director).'<br/><br/><br/>';
//   echo 'size of file: '.filesize($director).'<br/>';
if(strlen($director)===0)
{
//   echo 'file is data is fuct<br/>';
$options['empty']=true;
}//is not good so far
else{
//   echo'file is not empty<br/>';
}

}
function check_file_age($options){
global $do_new_file, $options;
//caching time, in seconds 3600 = 1 hr, 86400= 1 day
  $filemtime = @filemtime($options['file']);  // returns FALSE if file does not exist

//   echo'filemtime: '.$filemtime.'<br/>';
//   echo'time: '.time().'<br/>';
//   echo'this file is this old: '.(time() - $filemtime) .'<br/>';
  if ((time() - $filemtime) >= $options['cache']){
$options['expired']=true;
//   echo'file too old<br/>';
}
else{
$options['expired']=false;
//   echo'this file is not old!<br/>';
}


}

function write_preview_file($options){

global $options;
$options['data']=@file_get_contents($options['image_url']);//only load the stuff if the file is not there
  $fh = fopen($options['file'], 'w');
  fwrite($fh,$options['data']);
  fclose($fh);
//   echo'wrote file<br/>';
}

////   echo 'this is the google image:';
//   echo '<img itemprop="image" src ="'.$data_array['google'].'">';


?>