installer.php

<?php
namespace Bitrix\Sender\Preset\Installation;
 
use Bitrix\Main\Config\Option;
use Bitrix\Main\Localization\Loc;
 
Loc::loadMessages(__FILE__);
 
class Installer
{
    protected $errors = array();
    protected static $version = 2;
    protected static $versionOptionName = 'sender_preset_version';
 
    public static function checkVersion()
    {
        return self::getVersion() > self::getInstalledVersion();
    }
 
    public static function getInstallable()
    {
        return Factory::getInstallable();
    }
 
    public static function installNewest()
    {
        if (!self::checkVersion())
        {
            return false;
        }
 
        $instance = new self;
        return $instance->install();
    }
 
    public function install()
    {
        if(!self::checkVersion())
        {
            return true;
        }
 
        foreach($this->getInstallable() as $installable)
        {
            if($installable->isInstalled())
            {
                continue;
            }
 
            $installable->install();
        }
 
        if(!$this->hasErrors())
        {
            self::updateInstalledVersion();
        }
 
        return $this->hasErrors();
    }
 
    public function uninstall(iInstallable $installable = null)
    {
        if($installable)
        {
            $installable->uninstall();
        }
        else
        {
            foreach($this->getInstallable() as $installable)
            {
                if(!$installable->isInstalled())
                {
                    continue;
                }
 
                $installable->uninstall();
            }
 
            self::updateInstalledVersion(0);
        }
    }
 
    public static function updateInstalledVersion($version = null)
    {
        if($version === null)
        {
            $version = self::getVersion();
        }
 
        Option::set('sender', self::$versionOptionName, $version);
    }
 
    protected static function getVersion()
    {
        return self::$version;
    }
 
    protected static function getInstalledVersion()
    {
        return (int) Option::get('sender', self::$versionOptionName, 0);
    }
 
    public function getErrors()
    {
        return $this->errors;
    }
 
    public function hasErrors()
    {
        return count($this->errors) > 0;
    }
}