<?php
class UploadException extends Exception
{
    public function __construct($code)
    {
        $message = $this->codeToMessage($code);
        parent::__construct($message, 500);
    }

    private function codeToMessage($code)
    {
        switch ($code) {
            case UPLOAD_ERR_INI_SIZE:
                $message = 'The uploaded file exceeds the upload_max_filesize directive in php.ini';
                break;
            case UPLOAD_ERR_FORM_SIZE:
                $message = 'The uploaded file exceeds the MAX_FILE_SIZE directive that was '.
                           'specified in the HTML form';
                break;
            case UPLOAD_ERR_PARTIAL:
                $message = 'The uploaded file was only partially uploaded';
                break;
            case UPLOAD_ERR_NO_FILE:
                $message = 'No file was uploaded';
                break;
            case UPLOAD_ERR_NO_TMP_DIR:
                $message = 'Missing a temporary folder';
                break;
            case UPLOAD_ERR_CANT_WRITE:
                $message = 'Failed to write file to disk';
                break;
            case UPLOAD_ERR_EXTENSION:
                $message = 'File upload stopped by extension';
                break;

            default:
                $message = 'Unknown upload error';
                break;
        }

        return $message;
    }
}