Как добавить автоматическую подстановку доменов при входе в Roundcube

sudo mkdir /var/www/html/webmail/plugins/login_autocomplete/

sudo nano /var/www/html/webmail/plugins/login_autocomplete/login_autocomplete.php

<?php
 
class login_autocomplete extends rcube_plugin
{
    public $task = 'login'; 
 
    // =========================================================================
    // НАСТРОЙКИ ПЛАГИНА
    // =========================================================================
 
	//Запрещать домены, которых нет в списке
    private $restrict_domains = true;
 
	//Включить логи. Используется путь записи логов из переменной $config['log_dir']
    private $enable_logging = true;
 
	//Название лога
    private $log_filename = 'autocomplete_auth.log';
 
	//Список доменов
    private $allowed_domains = ['domain1.tld', 'domain2.tld'];
    // =========================================================================
 
    public function init()
    {
        $this->add_hook('authenticate', [$this, 'validate_login_domain']);
 
        $this->add_hook('template_object_loginform', [$this, 'login_form_modify']);
    }
 
    public function validate_login_domain($args)
    {
        $user_email = trim($args['user']);
 
        if (!$this->restrict_domains) {
            $this->log_action($user_email, 'ALLOWED (Control disabled)');
            return $args;
        }
 
        if (strpos($user_email, '@') !== false) {
            $parts = explode('@', $user_email);
            $user_domain = strtolower(end($parts));
 
            if (!in_array($user_domain, $this->allowed_domains)) {
 
                $this->log_action($user_email, 'BLOCKED (Unauthorized domain)');
 
                $rcmail = rcube::get_instance();
                unset($_SESSION['login_error']);
 
                $rcmail->output->show_message('Вход с этого почтового домена запрещен администратором', 'error');
 
                $args['abort'] = false;
                $args['pass'] = ''; 
 
                if ($rcmail->output->ajax_request) {
                    $rcmail->output->send();
                    exit;
                }
 
                $rcmail->output->send('login');
                exit;
            }
        }
 
        $this->log_action($user_email, 'ALLOWED (Domain check passed)');
 
        return $args;
    }
 
    private function log_action($user, $status)
    {
        if (!$this->enable_logging) return;
 
        $rcmail = rcube::get_instance();
        $log_dir = rtrim($rcmail->config->get('log_dir', RCUBE_INSTALL_PATH . 'logs'), '/\\');
        $log_file = $log_dir . DIRECTORY_SEPARATOR . $this->log_filename;
 
        $ip = rcube_utils::remote_addr();
        $date = date('Y-m-d H:i:s');
        $log_line = sprintf("[%s]: %s -> %s (IP: %s)\n", $date, $user, $status, $ip);
 
        if ($fp = @fopen($log_file, 'a')) {
            @fwrite($fp, $log_line);
            @fflush($fp);
            @fclose($fp);
        }
    }
 
    public function login_form_modify($args)
    {
        $domains_json = json_encode($this->allowed_domains);
 
        $styles = "
        <style>
        .rc-autocomplete-container { position: relative; width: 100%; }
        .rc-autocomplete-list {
            position: absolute; top: 100%; left: 0; z-index: 9999; width: 100%;
            background: #ffffff; border: 1px solid #cbd5e1; border-radius: 4px;
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1); max-height: 200px;
            overflow-y: auto; margin-top: 2px; padding: 0; list-style: none; display: none;
        }
        .rc-autocomplete-item { padding: 10px 14px; cursor: pointer; color: #334155; font-size: 14px; text-align: left; }
        .rc-autocomplete-item:hover { background: #f1f5f9; color: #0284c7; }
        </style>";
 
        $script = "
        <script>
        (function() {
            var baseDomains = {$domains_json};
            var checkInput = setInterval(function() {
                var userInput = document.getElementById('rcmloginuser');
                if (userInput) {
                    clearInterval(checkInput);
                    userInput.setAttribute('autocomplete', 'new-password');
 
                    var wrapper = document.createElement('div');
                    wrapper.className = 'rc-autocomplete-container';
                    userInput.parentNode.insertBefore(wrapper, userInput);
                    wrapper.appendChild(userInput);
 
                    var listContainer = document.createElement('ul');
                    listContainer.className = 'rc-autocomplete-list';
                    wrapper.appendChild(listContainer);
 
                    function renderSuggestions() {
                        var val = userInput.value.trim();
                        if (val.length === 0 || val.includes('@')) {
                            listContainer.style.display = 'none';
                            return;
                        }
                        listContainer.innerHTML = '';
                        baseDomains.forEach(function(domain) {
                            var li = document.createElement('li');
                            li.className = 'rc-autocomplete-item';
                            li.textContent = val + '@' + domain;
                            li.addEventListener('click', function() {
                                userInput.value = val + '@' + domain;
                                listContainer.style.display = 'none';
                                userInput.focus();
                            });
                            listContainer.appendChild(li);
                        });
                        listContainer.style.display = 'block';
                    }
 
                    userInput.addEventListener('input', renderSuggestions);
                    document.addEventListener('click', function(e) {
                        if (e.target !== userInput) listContainer.style.display = 'none';
                    });
                }
            }, 50);
        })();
        </script>";
 
        $args['content'] .= $styles . $script;
        return $args;
    }
}

sudo chown -R www-data:www-data /var/www/html/webmail/plugins/login_autocomplete/

sudo nano /var/www/html/webmail/config/config.inc.php

$config['plugins'] = [
   //Прочие плагины  
   //...
    'login_autocomplete',
];