<?php

/* ARGV */
$env = 'production';
$unitId = false;
$verbose = false;
$limit = false;
if (isset($argv)) {
    array_shift($argv);
    if (count($argv) > 0) {
        foreach ($argv as $value) {
            switch($value) {
                case '-v':
                    $verbose = true;
                    break;
                case '-l':
                    $limit = 10000;
                    break;
                default:
                    $env = $value;
                    break;
            }
        }
    }
}

define('APPLICATION_ENV', $env);
define('ROOT', realpath(__DIR__ . '/..') . '/');
date_default_timezone_set('Europe/Moscow');
require_once(ROOT . 'config.php');
require_once(ROOT . 'lib/autoloader.php');

$db = Db_Driver::getInstance();

Output::title('Демон удаляет не используемые изображения из системы');

$uploadsDir = ROOT . 'uploads';
$totalClear = $filesChecked = $filesRemoved = 0;

function removeFile($relativePath) {
    global $totalClear, $filesRemoved;

    $fullPath = ROOT . $relativePath;
    if (file_exists($fullPath)) {
        $totalClear += filesize($fullPath);
        $filesRemoved++;
        unlink($fullPath);
    } else {
        return false;
    }

    return true;
}

function humanFilesize($size, $precision = 2) {
    $units = array('B','kB','MB','GB','TB','PB','EB','ZB','YB');
    $step = 1024;
    $i = 0;
    while (($size / $step) > 0.9) {
        $size = $size / $step;
        $i++;
    }
    return round($size, $precision).$units[$i];
}

function checkDirectory($path) {
    global $db, $filesChecked, $limit, $filesRemoved;

    $files = scandir($path);
    foreach($files as $file) {
        if (in_array($file, ['.', '..'])) continue;

        $filePath = $path . '/' . $file;

        if (is_dir($filePath)) {
            checkDirectory($filePath);
        } else {
            $relativePath = str_replace(ROOT, '', $filePath);

            echo $relativePath . PHP_EOL;
            $filesChecked++;

            $attachment = $db->select()->from(Attachment::$table_name . ' a')
                ->where('a.file = ? OR a.file_thumb = ?', [$relativePath, $relativePath])
                ->fetchRow();

            if (empty($attachment)) {
                echo ' - no attachment for file: '
                    . (removeFile($relativePath) ? 'removed' : 'not removed')
                    . PHP_EOL;
            } else {
                // Пока остановимся на такой проверке
            }

            echo PHP_EOL;
        }

        if ($limit && $filesRemoved >= $limit) {
            break;
        }
    }
}

checkDirectory($uploadsDir);

echo PHP_EOL;
echo 'File checked: ' . $filesChecked . PHP_EOL;
echo 'File removed: ' . $filesRemoved . PHP_EOL;
echo 'Total space freed: ' . humanFilesize($totalClear, 2) . PHP_EOL;
echo PHP_EOL;

Output::success('Завершено');