<?php

class Qs_FileFs
{
    const WEB_PATH = 'userfiles/files';

    /** @var array */
    protected static $_config;

    /**
     * @param bool|string|int $field
     * @param mixed $default
     * @return mixed
     */
    public static function getConfig($field = false, $default = null)
    {
        if (null === static::$_config) {
            $name = lcfirst(substr(get_called_class(), 3));
            static::$_config = Qs_Config::get($name, 'qs')->toArray();
        }
        if (false === $field) {
            return static::$_config;
        }
        return (array_key_exists($field, static::$_config)) ? static::$_config[$field] : $default;
    }

    /**
     * Returns non quoted relative target file name
     * Example: userfiles/files/notes(18).pdf
     *
     * @static
     * @param $name
     * @return string
     */
    protected static function _getFullName($name)
    {
        if (!empty($name)) {
            if ('.' === dirname($name)) {
                $name = Qs_ImageFs::WEB_PATH . '/' . $name;
            }
            $fullName = WWW_PATH . '/' . $name;
            if (file_exists($fullName)) {
                return $name;
            }
        }
        return null;
    }

    public static function getFileFullName($name)
    {
        return constant('WWW_PATH') . '/' . self::WEB_PATH . '/' . $name;
    }

    /**
     * @static
     * @param string $fullName
     * @return string
     */
    public static function quotePath($fullName)
    {
        $parts = explode('/', $fullName);
        return implode('/', array_map('rawurlencode', $parts));
    }

    /**
     * Returns quoted full file name
     * Example: userfiles/notes(18).pdf
     *
     * @static
     * @param string $name
     * @return string
     */
    public static function get($name)
    {
        $fullName = static::_getFullName($name);
        return static::quotePath($fullName);
    }

    public static function getFullPath($name)
    {
        $name = $name ? static::_getFullName($name) : null;
        return $name ? WWW_PATH . '/' . $name : null;
    }

    public static function getUrl($name)
    {
        $name = static::get($name);
        if ($name) {
            $name = BASE_URL . '/' . $name;
        }
        return $name;
    }

    /**
     * @param string $fullName
     * @return bool
     */
    public static function delete($fullName)
    {
        if (file_exists($fullName)) {
            return unlink($fullName);
        }
        return false;
    }
}