<?php
if(PHP_SAPI !== 'cli'){
    echo 'Скрипт запущен не из консоли!';
    return;
}
$UPLOAD_DIR = realpath(__DIR__ ."/../.." )."/upload/";
convertInDir($UPLOAD_DIR);
global $ALLOW_FILE_EXTS;
$ALLOW_FILE_EXTS = ['jpg' , 'jpeg' , 'png'];



function convertInDir($UPLOAD_DIR){
    $odir = opendir($UPLOAD_DIR);
    global $ALLOW_FILE_EXTS;
    $ALLOW_FILE_EXTS = ['jpg' , 'jpeg' , 'png'];

    while (($file = readdir($odir)) !== FALSE)
    {
        if ($file != '.' && $file != '..')
        {
            if(is_dir($UPLOAD_DIR . $file)){
                scanDirectory($UPLOAD_DIR . $file);
            }else if(isNeedConvert($UPLOAD_DIR . $file)){
                convert($UPLOAD_DIR . $file);
            }
        }
    }

    closedir($odir);
}

function scanDirectory($dir){
    $odir = opendir($dir);
    while (($file = readdir($odir)) !== FALSE)
    {
        if ($file != '.' && $file != '..')
        {
            $pathfile = $dir . '/' . $file;
            if(is_dir($pathfile)){
                scanDirectory($pathfile);
            }else if(isNeedConvert($pathfile)){
                convert($pathfile);
            }
        }
    }

    closedir($odir);
}

function isNeedConvert($pathfile){
    global $ALLOW_FILE_EXTS;
    $pathinfo = pathinfo($pathfile);
    return is_file($pathfile) && in_array(strtolower($pathinfo['extension']) , $ALLOW_FILE_EXTS) && (!file_exists($pathfile . '.webp') || (filectime($pathfile . '.webp') !== filectime($pathfile)));
}

function convert($file){
    $dirname = dirname($file);
    $file = str_replace(' ' , '\ ' , $file);
    $pathinfo = pathinfo($file);
    exec('cwebp ' . $file . ' -q 80 -o ' . $pathinfo['dirname'] . '/' . $pathinfo['filename'] . '.'.$pathinfo['extension'] . '.webp');
    $now = time();
    touch($dirname . '/' . $pathinfo['filename'] . '.'.$pathinfo['extension'] . '.webp' , $now);
    touch($dirname . '/' . $pathinfo['filename'] . '.'.$pathinfo['extension'] , $now);
}