<?php

    //Check Folder Empty
    function checkFolderHasFiles ( $folderName ){
        $files = array ();
        if ( $handle = opendir ( $folderName ) ) {
            while ( false !== ( $file = readdir ( $handle ) ) ) {
                if ( $file != "." && $file != ".." )
                    $files[] = $file;
                if(count($files) >= 1)
                    break;
            }
            closedir ( $handle );
        }
        return ( count ( $files ) > 0 ) ? TRUE: FALSE;
    }

    //Delete files or directory
    function deleteDir($dirPath)
    {
        if (!is_dir($dirPath)) {
            if (file_exists($dirPath) !== false) {
                unlink($dirPath);
            }
            return;
        }

        if ($dirPath[strlen($dirPath) - 1] != '/') {
            $dirPath .= '/';
        }

        $files = glob($dirPath . '*', GLOB_MARK);
        foreach ($files as $file) {
            if (is_dir($file)) {
                deleteDir($file);
            } else {
                unlink($file);
            }
        }

        rmdir($dirPath);
    }

    //Get folder size
    function FolderSize($dir) {
        $fSize = 0;
        foreach(new RecursiveIteratorIterator(new RecursiveDirectoryIterator($dir)) as $f){
            $size+=$f->getSize();
        }
    return $fSize;
    }

    //Convert bytes to MB
    function bytesToMB($file)
    {
       $filesize = (filesize($file) * .0009765625) * .0009765625; // bytes to MB
       return round($filesize, 2);
    }

    //Update free space accordingly
    function updateFreeSpace(string $isAddition){
        //Get the size of the file and update the available free space in the database
            $freeSpace = $_SESSION['freeSpace'];
            if($isAddition == "addition")
                $freeSpace = $freeSpace + bytesToMB(FolderSize('uploads/'.$_SESSION['username'].'/'.$fileName));
            else
                $freeSpace = $freeSpace - bytesToMB(FolderSize('uploads/'.$_SESSION['username'].'/'.$fileName));

            $_SESSION['freeSpace'] = $freeSpace;

            $username = $_SESSION['username'];
            $query = "UPDATE users
                      SET freeSpace = $freeSpace
                      WHERE username = '$username'";

            require 'dbCon.php';
            mysqli_query($db, $query);
    }



?>