<?php

/**
 * Set SMTP server address depend on $_SESSION['imap_host']
 *
 * Very simple plugin which will allow to use different SMTP server address.
 *
 * Enable the plugin in config.inc.php and add your desired head:
 * $config['fix_smtp_server'] = array('User-Agent' => 'My-Very-Own-Webmail');
 *
 * @author Victor Ustugov
 * @website https://mta.org.ua
 */
class fix_smtp_server extends rcube_plugin {
    function init() {
        $this->add_hook('message_before_send', array($this, 'fix_smtp_server_address'));
    }

    function fix_smtp_server_address($args) {
        $this->load_config();

        $rcube = rcube::get_instance();
        $smtp_servers = $rcube->config->get('smtp_servers');

        if (!empty($smtp_servers) and is_array($smtp_servers)) {
            $new_smtp_server = false;
            while (($new_smtp_server === false) and ($smtp_server_item = array_shift($smtp_servers))) {
                if (!empty($smtp_server_item['equal']) and ($_SESSION[$smtp_server_item['key']] == $smtp_server_item['equal'])) {
                    $new_smtp_server = $smtp_server_item['value'];
                } elseif (!empty($smtp_server_item['regexp']) and (preg_match($smtp_server_item['regexp'], $_SESSION[$smtp_server_item['key']]))) {
                    $new_smtp_server = $smtp_server_item['value'];
                }
            }

            if ($new_smtp_server !== false) {
                $smtp_server = $rcube->config->get('smtp_server');
                if ($smtp_server != $new_smtp_server) {
                    $rcube->config->set('smtp_server', $new_smtp_server);
                }
            }
        }

        return $args;
    }
}