chat backend ajax

$response = array(
    'FIELDS' => array(
        'NAME' => trim($request->get('NAME')),
        'EMAIL' => trim($request->get('EMAIL')),
        'PASSWORD' => trim($request->get('PASSWORD')),
        'MESSAGE' => trim($request->get('MESSAGE')),
    ),
    'HIDDENS' => array(),
    'ERRORS' => array(),
    'WARNINGS' => array(),
    'SUCCESS' => array()
);

// CHECK HIDDENS

if(intval($request->get('EDIT_ID')))
{
    $response['HIDDENS']['EDIT_ID'] = $request->get('EDIT_ID');
    $response['EDIT_ID'] = $request->get('EDIT_ID');
}

// CHECK FIELDS

if(empty($response['FIELDS']['NAME']))
{
    $response['ERRORS']['NAME'] = 'Введите имя';
}

if(empty($response['FIELDS']['MESSAGE']))
{
    $response['ERRORS']['MESSAGE'] = 'Введите сообщение';
}

if(strlen($response['FIELDS']['MESSAGE']) > 1000)
{
    $response['ERRORS']['MESSAGE'] = 'Введите сообщение меньше 1000 символов';
}

if(!User::getInstance()->isAuthorized())
{
    if(!filter_var($response['FIELDS']['EMAIL'], FILTER_VALIDATE_EMAIL))
    {
        $response['ERRORS']['EMAIL'] = 'Введите корректный email';
    }

    if(empty($response['ERRORS']))
    {
        $user = new \CUser();
        $arUser = UserTable::GetList(array(
            'filter' => array('LOGIN' => $response['FIELDS']['EMAIL']),
            'select' => array('ID', 'UF_IP')
        ))->fetch();

        if(intval($arUser['ID']))
        {
            if($arUser['UF_IP'] == User::getUserIP())
            {
                User::getInstance()->Authorize($arUser['ID'], true);
                $response['SUCCESS'][] = 'Вы успешно авторизовались';
            }
            else
            {
                $response['DIFFERENCE_IP'] = true;

                if(empty($response['FIELDS']['PASSWORD']))
                {
                    $response['WARNINGS']['EMAIL'] = 'Введите пароль из письма';
                }
                else
                {
                    $result = User::getInstance()->Login($response['FIELDS']['EMAIL'], $response['FIELDS']['PASSWORD'], true);

                    if($result['TYPE'] !== 'ERROR')
                    {
                        $response['DIFFERENCE_IP'] = false;
                        $response['SUCCESS'][] = 'Вы успешно авторизовались';
                        $user->update($arUser['ID'], array('UF_IP' => User::getUserIP()));
                    }
                    else
                    {
                        $response['WARNINGS']['PASSWORD'] = 'Неверный пароль';
                    }
                }
            }
        }
        else
        {
            $user = new \CUser;

            $password = rand(100000, 999999);
            $arFields = array(
                'ACTIVE' => 'Y',
                'NAME' => $response['FIELDS']['NAME'],
                'EMAIL' => $response['FIELDS']['EMAIL'],
                'LOGIN' => $response['FIELDS']['EMAIL'],
                'PASSWORD' => $password,
                'CONFIRM_PASSWORD' => $password,
                'UF_PASSWORD' => $password,
                'UF_IP' => User::getUserIP()
            );

            if($UID = $user->Add($arFields))
            {
                $response['SUCCESS'][] = 'Вы успешно зарегистрированы';
                User::getInstance()->Authorize($UID, true);

                Event::send(array(
                    "EVENT_NAME" => 'FEEDBACK_FORM',
                    "C_FIELDS" => array(
                        'EMAIL_TO' => $response['FIELDS']['EMAIL'],
                        'NAME' => $response['FIELDS']['NAME'],
                        'PASSWORD' => $password
                    ),
                    "LID" => SITE_ID,
                    "DUPLICATE" => 'N',
                    "MESSAGE_ID" => 81
                ));
            }
            else
            {
                Log::add2log(array(
                    'Ошибка регистрации пользователя',
                    $user->LAST_ERROR
                ));
            }
        }
    }
}

if(empty($response['ERRORS']) && User::getInstance()->isAuthorized())
{
    $ORMGChat = ORMFactory::compile('general_chat', 'communications');
    $arFields = array(
        'DATE' => new DateTime(),
        'NAME' => $response['FIELDS']['NAME'],
        'TEXT' => $response['FIELDS']['MESSAGE'],
        'USER_ID' => User::getInstance()->getID()
    );

    if(intval($response['EDIT_ID']))
    {
        $arMessage = $ORMGChat::GetList(array(
            'filter' => array('ID' => $response['EDIT_ID']),
            'select' => array('ID', 'DATE')
        ))->fetch();

        if(intval($arMessage['ID']))
        {
            $arFields['DATE'] = $arMessage['DATE'];

            $result = $ORMGChat::update($response['EDIT_ID'], $arFields);
        }
        else
        {
            $response['WARNINGS'][] = 'Сообщение не доступно';
            $response['FIELDS']['MESSAGE'] = '';
            $response['HIDDENS'] = array();
            $response['EDIT_ID'] = false;
        }
    }
    else
    {
        $result = $ORMGChat::add($arFields);
    }

    if($result->isSuccess())
    {
        if(intval($response['EDIT_ID']))
        {
            $response['SUCCESS'][] = 'Сообщение обновлено';

            \CPullWatch::AddToStack('GENERAL_CHAT', Array(
                'module_id' => 'general_chat',
                'command' => 'update',
                'params' => array(
                    'EDIT_ID' => $response['EDIT_ID'],
                    'MESSAGE' => self::getMesssage(
                        $result->getId(),
                        User::getInstance()->GetID(),
                        $arFields['NAME'],
                        $arFields['DATE']->format('G:i:s'),
                        htmlspecialchars($arFields['TEXT'])
                    )
                )
            ));
        }
        else
        {
            \CPullWatch::AddToStack('GENERAL_CHAT', Array(
                'module_id' => 'general_chat',
                'command' => 'add',
                'params' => array(
                    'MESSAGE' => self::getMesssage(
                        $result->getId(),
                        User::getInstance()->GetID(),
                        $arFields['NAME'],
                        $arFields['DATE']->format('G:i:s'),
                        htmlspecialchars($arFields['TEXT'])
                    )
                )
            ));
        }

        $response['FIELDS']['MESSAGE'] = '';
        $response['HIDDENS'] = array();
        $response['EDIT_ID'] = false;
    }
    else
    {
        $response['SUCCESS'] = false;
        $response['WARNINGS'][] = 'Ошибка редактирования';

        Log::add2log(array_merge(
            array('Ошибка редактирования'),
            $result->getErrorMessages()
        ));
    }

    $response['USER_ID'] = $arFields['USER_ID'];
}

$GLOBALS['CHAT_USER_FORM'] = $response;

ob_start();
App::GetInstance()->IncludeComponent(
    "bitrix:main.include",
    "",
    array(
        "AREA_FILE_SHOW" => "file",
        "PATH" => "/local/include/user_form.php"
    ),
    false,
    array('HIDE_ICONS'=>'Y')
);
$response['FORM'] = ob_get_contents();
ob_end_clean();

echo json_encode($response);