<?php

include_once('config.php');
include_once('functions.php');

if (file_exists(SFORI_FILENAME))
{
    //get last modification day difference from current
	$date = new DateTime();
	$dayDiff = abs( $date->getTimestamp() - filemtime(SFORI_FILENAME) )/86400;

	//if time diff from now > 28 days
	//empty the file content
	//get data from the link
	//save it in text file
	if( $dayDiff > 28 )
	{
		$handle = fopen(SFORI_FILENAME, 'w') or die('Cannot open file:  '.SFORI_FILENAME);
		if ($handle !== false)
			ftruncate($handle, 0);

		$data = get_data_from_url(SFORI_WEBSITE);
		fwrite($handle, $data);
		fclose($handle);
	}
}
else
{
    //create a file
    $handle = fopen(SFORI_FILENAME, 'w') or die('Cannot open file:  '.SFORI_FILENAME);
    fclose($handle);
}