<?php

interface LoginStrategy {
    public function onLogin();
}

class AdminLogin implements LoginStrategy {

    public function onLogin()
    {
        echo "logined as admin";
    }
}

class CustomerLogin implements LoginStrategy {

    public function onLogin()
    {
        echo "logined as user";
    }
}

class SellerLogin implements LoginStrategy {

    public function onLogin()
    {
        echo "logined as seller";
    }
}

class LoginTypeSelector {

    public $loginType;

    public function __construct($loginType)
    {
        switch ($loginType) {
            case "customer":
                $this->loginType = new CustomerLogin();
                break;
            case "admin":
                $this->loginType = new AdminLogin();
                break;
            case "seller":
                $this->loginType = new SellerLogin();
                break;
        }
    }
}

class Loginer {

    private $decryptor;

    public function __construct(Decryptor $decryptor)
    {
        $this->decryptor = $decryptor;
    }

    public function login($dataForLogin)
    {
        $userData = DataKeeper::takeData();

        foreach ($userData as $singleUser)
        {
            $singleUser['password'] = $this->decryptor->decrypt($singleUser['password']);

            if($dataForLogin['login'] == $singleUser['login'] && $dataForLogin['password'] == $singleUser['password'])
            {
                $loginType = new LoginTypeSelector($singleUser['type']);
                $loginType->loginType->onLogin();

                break;
            }

//            return false;
        }
    }
}

class Decryptor {

    public function decrypt($data)
    {
        return $data;
    }

}

class DataKeeper {

    public static function takeData()
    {
        $data = array([
            'type' => 'customer',
            'login' => '123@mail.ru',
            'password' => 'pass'
        ], [
            'type' => 'admin',
            'login' => '456@mail.ru',
            'password' => 'pass'
        ], [
            'type' => 'seller',
            'login' => '789@mail.ru',
            'password' => 'pass'
        ]);

        return $data;
    }
}


$decryptor = new Decryptor();
$loginer = new Loginer($decryptor);

$data = [
    'login' => '123@mail.ru',
    'password' => 'pass'
];

$loginer->login($data)

?>