<?php

require_once 'core/settings.php';

class Installer 
{
    protected $db;
    protected $installPath;
    public    $_registry;

    public function __construct(Settings $_registry)
    {
        $this->_registry = $_registry;
    }
    
    public function setUp($db, $installPath)
    {
        $this->db = $db;
        $this->installPath = $installPath;
    }

    function getSetupFile($name)
    {
        return Path::join(call_user_func($this->installPath, $name), "setup.php"); 
    }

    // Проверка версии обновления
    function isChanged($name) // Информация о модулях
    {
        $item = $this->_registry->readKey(array($name));
        if ($item) {
            $setup = $this->getSetupFile($name);
            if (file_exists($setup) && (filemtime($setup) > $item['time'])) {
                return true;
            }
            return false;
        }
        return true;
    }

    function installSQL(array $sql, $version_new, $version_old, $name)
    {
        require_once "core/setup.php";
        foreach ($sql as $version => $install) {
            if (version_compare($version, $version_new, "<=") && version_compare($version, $version_old, ">")) {
                // this->installPath this->db
                $file = Path::join(call_user_func($this->installPath, $name), "sql", $install);
                Setup::batchSQL($this->db, $file);
            }
        }
    }

    // Устанавливает обновления если есть
    function doUpdates($name, $force = false) // Установка модуля
    {
        $setup = $this->getSetupFile($name);
        if (file_exists($setup) && ($this->isChanged($name) || $force)) {

            $registry = $this->_registry;
            $settings = new Settings($setup);
            $settings->read();

            $item = $registry->readKey(array($name));

            $version_new = $settings->get('version');
            if ($item) {
                $version_old = $item['version']; 
            } else {
                $version_old = "0.0";
                $registry->writeKey(array($name), array());
            }

            if (version_compare($version_old, $settings->get('version'), "!=")) {
                $sql = $settings->get('sql');
                if (is_array($sql)) {
                    $this->installSQL($sql, $version_new, $version_old, $name);
                }
            }   

            // Обновление версии меню
            $registry->writeKey(array($name), $settings->get('settings'));
            $registry->writeKey(array($name), 
                                      array('version' => $version_new, 
                                            'time' => filemtime($setup)));
            $registry->write();
        }
    }
}