ident_switch.php

<?php
/**
 * Identities IMAP
 *
 * This plugin allows fast switching between accounts.
 *
 * @url
 */
class ident_switch extends rcube_plugin
{
	public $task = '?(?!login|logout).*';

	private static $logging = true;

	const TABLE = 'ident_switch';
	const MY_POSTFIX = '_iswitch';

	// Flags user in database
	const DB_ENABLED		    = 1;
	//const DB_SECURE_SSL		= 2; // Not supported any more
	const DB_SECURE_IMAP_TLS	= 4;

	// SMTP auth values
	const SMTP_AUTH_IMAP = 1;
	const SMTP_AUTH_NONE = 2;

	function init()
	{
		$this->add_hook('startup', array($this, 'on_startup'));
		$this->add_hook('render_page', array($this, 'on_render_page'));
		$this->add_hook('smtp_connect', array($this, 'on_smtp_connect'));
		$this->add_hook('identity_form', array($this, 'on_identity_form'));
		$this->add_hook('identity_update', array($this, 'on_identity_update'));
		$this->add_hook('identity_create', array($this, 'on_identity_create'));
		$this->add_hook('identity_create_after', array($this, 'on_identity_create_after'));
		$this->add_hook('identity_delete', array($this, 'on_identity_delete'));
		$this->add_hook('template_object_composeheaders', array($this, 'on_template_object_composeheaders'));
		$this->add_hook('preferences_list', array($this, 'on_special_folders_form'));
		$this->add_hook('preferences_save', array($this, 'on_special_folders_update'));

		$rc = rcmail::get_instance();
		// check for LDAP
		if ($rc->config->get('ldapAliasSync', null))
			$this->add_hook('storage_connect', array($this, 'override_ldap_password'));

		$this->register_action('plugin.ident_switch.switch', array($this, 'on_switch'));

		foreach (rcube_storage::$folder_types as $type)
		{
			$key = $type . '_mbox_default' . self::MY_POSTFIX;
			if (!isset($_SESSION[$key]))
				$_SESSION[$key] = $rc->config->get($type . '_mbox');
		}
		$this->load_config(); // config.inc.php
		self::$logging = rcmail::get_instance()->config->get('ident_switch.logging', true);
	}

	function on_startup($args)
	{
		$rc = rcmail::get_instance();

		if (strcasecmp($rc->user->data['username'], $_SESSION['username']) !== 0)
		{ // We are impersonating
			$rc->config->set('imap_cache', null);
			$rc->config->set('messages_cache', false);

			if ($args['task'] == 'mail')
			{
				$this->add_texts('localization/');
				$rc->config->set('create_default_folders', false);
			}
		}

		foreach (rcube_storage::$folder_types as $type)
		{
			$defaultKey = $type . '_mbox_default' . self::MY_POSTFIX;
			$otherKey = $type . '_mbox' . self::MY_POSTFIX;
			$val = isset($_SESSION[$otherKey]) ? $_SESSION[$otherKey] : $_SESSION[$defaultKey];
			$rc->config->set($type . '_mbox', $val);
		}

		return $args;
	}

	function on_render_page($args)
	{
		$rc = rcmail::get_instance();

		switch ($rc->task)
		{
		case 'mail':
			$this->render_switch($rc, $args);
			break;
		case 'settings':
			$this->include_script('ident_switch-form-min.js');
			break;
		}


		return $args;
	}

	private function render_switch($rc, $args)
	{
		// Currently selected identity
		$iid_s = isset($_SESSION['iid' . self::MY_POSTFIX]) ? $_SESSION['iid' . self::MY_POSTFIX] : '-1';

		$iid = 0;
		if (is_int($iid_s))
			$iid = $iid_s;
		elseif ($iid_s === '-1')
			$iid = -1;
		elseif (ctype_digit($iid_s))
			$iid = intval($iid_s);

		$accNames = array(isset($_SESSION['global_alias']) ? $_SESSION['global_alias'] : $rc->user->data['username']);
		$accValues = array(-1);
		$accSelected = -1;

		// Get list of alternative accounts
		$sql = "SELECT "
			. "isw.id, isw.iid, isw.label, isw.username, ii.email"
			. " FROM"
			. " {$rc->db->table_name(self::TABLE)} isw"
			. " INNER JOIN {$rc->db->table_name('identities')} ii ON isw.iid=ii.identity_id"
			. " WHERE isw.user_id = ? AND isw.flags & ? > 0";
		$qRec = $rc->db->query($sql, $rc->user->data['user_id'], self::DB_ENABLED);
		while ($r = $rc->db->fetch_assoc($qRec))
		{
			$accValues[] = $r['id'];
			if ($iid == $r['iid'])
				$accSelected = $r['id'];

			// Make label
			$lbl = $r['label'];
			if (!$lbl)
			{
				if (!$r['username'])
					$r['username'] = $r['email'];

				if (strpos($r['username'], '@') === false)
					$lbl = $r['username'] . '@' . ($r['host'] ? $r['host'] : 'localhost');
				else
					$lbl = $r['username'];
			}
			$accNames[] = rcube::Q($lbl);
		}

		// Render UI if user has extra accounts
		if (count($accValues) > 1)
		{
			$this->include_script('ident_switch-switch-min.js');

			$select = new html_select(array(
				'id' => 'plugin-ident_switch-account',
				'style' => 'display: none; padding: 0;',
				'onchange' => 'plugin_switchIdent_switch(this.value);',
			));
			$select->add($accNames, $accValues);
			$rc->output->add_footer($select->show(array($accSelected)));
		}
	}

	function on_smtp_connect($args)
	{
		$iid = $_SESSION['iid' . self::MY_POSTFIX];
		if (!is_numeric($iid) || $iid == -1)
		{
			self::write_log('no identity switch is selected... trying to find related smtp server from the from header');
			$requestFrom = rcube_utils::get_input_value('_from', rcube_utils::INPUT_POST);
			if (empty($requestFrom)) {
				self::write_log('no _from post parameter found... falling back to original default config');
				return $args;
			} else {
				$iid = intval($requestFrom);
				if ($iid == 0) {
					self::write_log('falling back to original default config as _from post field is no integer: ' . $_POST['_from']);
					return $args;
				}
			}
		}

		$rc = rcmail::get_instance();

		$sql = 'SELECT smtp_host, flags, smtp_port, username, smtp_auth, password FROM ' . $rc->db->table_name(self::TABLE) . ' WHERE iid = ? AND user_id = ?';
		$q = $rc->db->query($sql, $iid ,$rc->user->ID);
		$r = $rc->db->fetch_assoc($q);
		if (is_array($r))
		{
			if (!$r['username'])
			{ // Load email from identity
				$sql = 'SELECT email FROM ' . $rc->db->table_name('identities') . ' WHERE identity_id = ?';
				$q = $rc->db->query($sql, $iid);
				$rIid = $rc->db->fetch_assoc($q);

				$r['username'] = $rIid['email'];
			}

			$args['smtp_user'] = $r['username'];
			$args['smtp_pass'] = $r['smtp_auth'] == self::SMTP_AUTH_IMAP ? $rc->decrypt($r['password']) : '';

			# In 1.6 smtp_server was renamed to smtp_host and includes port. smtp_port was depricated.
			$verParts = explode('.', RCMAIL_VERSION, 3);
			$paramSmtpHost = 'smtp_host';
			$paramSmtpPort = null;
			if (intval($verParts[0]) <= 1 && intval($verParts[1]) < 6)
			{
				$paramSmtpHost = 'smtp_server';
				$paramSmtpPort = 'smtp_port';
			}

			$args[$paramSmtpHost] = $r['smtp_host'] ? $r['smtp_host'] : 'localhost'; // Default SMTP host here

			if ($r['flags'] & self::DB_SECURE_IMAP_TLS)
			{
				if (strpos($args[$paramSmtpHost], ':') !== false)
					self::write_log('SMTP server already contains protocol, ignoring TLS flag.');
				else
					$args[$paramSmtpHost] = 'tls://' . $args[$paramSmtpHost];
			}

			$smtpPort = $r['smtp_port'] ? $r['smtp_port'] : 587; // Default SMTP port here
			if ($paramSmtpPort)
				$args[$paramSmtpPort] = $smtpPort;
			else
				$args[$paramSmtpHost] .= ':' . $smtpPort;
		}

		return $args;
	}

	private static function get_common_form(&$record)
	{
		$prefix = 'ident_switch.form.common.';
		return array(
			$prefix . 'enabled' => array('type' => 'checkbox', 'onchange' => 'plugin_switchIdent_enabled_onChange();'),
			$prefix . 'label' => array('type' => 'text', 'size' => 32, 'placeholder' => $record['email']),
			$prefix . 'readonly' => array('type' => 'hidden'),
		);
	}

	private static function get_imap_form(&$record)
	{
		$prefix = 'ident_switch.form.imap.';
		return array(
			$prefix . 'host' => array('type' => 'text', 'size' => 64, 'placeholder' => 'localhost'),
			$prefix . 'port' => array('type' => 'text', 'size' => 5, 'placeholder' => 143),
			$prefix . 'tls' => array('type' => 'checkbox'),
			$prefix . 'username' => array('type' => 'text', 'size' => 64, 'placeholder' => $record['email']),
			$prefix . 'password' => array('type' => 'password', 'size' => 64),
			$prefix . 'delimiter' => array('type' => 'text', 'size' => 1, 'placeholder' => '.'),
		);
	}

	private function get_smtp_form(&$record)
	{
		$prefix = 'ident_switch.form.smtp.';

		$authType = new html_select(array('name' => "_{$prefix}auth"));
		$authType->add($this->gettext('form.smtp.auth.imap'), (string)(self::SMTP_AUTH_IMAP));
		$authType->add($this->gettext('form.smtp.auth.none'), (string)(self::SMTP_AUTH_NONE));

		return array(
			$prefix . 'host' => array('type' => 'text', 'size' => 64, 'placeholder' => 'localhost'),
			$prefix . 'port' => array('type' => 'text', 'size' => 5, 'placeholder' => 587),
			$prefix . 'auth' => array('value' => $authType->show(array($record['ident_switch.form.smtp.auth']))),
		);
	}

	function on_identity_form($args)
	{
		$rc = rcmail::get_instance();

		// Do not show options for default identity
		if(	strcasecmp($args['record']['email'], $rc->user->data['username']) === 0)
			return $args;

		$this->add_texts('localization');

		$row = null;
		if (isset($args['record']['identity_id']))
		{
			$sql = 'SELECT * FROM ' . $rc->db->table_name(self::TABLE) . ' WHERE iid = ? AND user_id = ?';
			$q = $rc->db->query($sql, $args['record']['identity_id'], $rc->user->ID);
			$row = $rc->db->fetch_assoc($q);
		}

		$record = &$args['record'];

		// Load data if exists
		if ($row)
		{
			$dbToForm = array(
				'label' => 'common.label',
				'imap_host' => 'imap.host',
				'imap_port' => 'imap.port',
				'imap_delimiter' => 'imap.delimiter',
				'username' => 'imap.username',
				'password' => 'imap.password',
				'smtp_host' => 'smtp.host',
				'smtp_port' => 'smtp.port',
				'smtp_auth' => 'smtp.auth',

			);
			foreach ($row as $k => $v)
				if (isset($dbToForm[$k]))
					$record['ident_switch.form.' . $dbToForm[$k]] = $v;

			// Parse flags
			$record['ident_switch.form.common.enabled'] = !!($row['flags'] & self::DB_ENABLED);
			$record['ident_switch.form.imap.tls'] = !!($row['flags'] & self::DB_SECURE_IMAP_TLS);

			// Set readonly if needed
			$cfg = $this->get_preconfig($record['email']);
			if (is_array($cfg) && $cfg['readonly'])
			{
				$record['ident_switch.form.common.readonly'] = 1;
				if (in_array(strtoupper($cfg['user']), array('EMAIL', 'MBOX')))
					$record['ident_switch.form.common.readonly'] = 2;
			}
		}
		else
			$this->apply_preconfig($record);

		$args['form']['ident_switch.common'] = array(
			'name' => $this->gettext('form.common.caption'),
			'content' => ident_switch::get_common_form($record)
		);
		$args['form']['ident_switch.imap'] = array(
			'name' => $this->gettext('form.imap.caption'),
			'content' => ident_switch::get_imap_form($record)
		);
		$args['form']['ident_switch.smtp'] = array(
			'name' => $this->gettext('form.smtp.caption'),
			'content' => $this->get_smtp_form($record)
		);

		return $args;
	}

	function on_identity_update($args)
	{
		$rc = rcmail::get_instance();

		// Do not do anything for default identity
		if (strcasecmp($args['record']['email'], $rc->user->data['username']) === 0)
			return $args;

		if (!self::get_field_value('common', 'enabled', false))
		{
			self::sw_imap_off($args['id']);
			return $args;
		}

		$data = self::check_field_values();
		if (isset($data['err']))
		{
			$this->add_texts('localization');
			$args['abort'] = true;
			$args['message'] = 'ident_switch.err.' . $data['err'];
			return $args;
		}

		$data['id'] = $args['id'];
		self::save_field_values($rc, $data);

		return $args;
	}

	function on_identity_create($args)
	{
		$rc = rcmail::get_instance();

		// Do not do anything for default identity
		if (strcasecmp($args['record']['email'], $rc->user->data['username']) === 0)
			return $args;

		if (!self::get_field_value('common', 'enabled', false))
			return $args;

		$data = self::check_field_values();
		if ($data['err'])
		{
			$this->add_texts('localization');
			$args['abort'] = true;
			$args['message'] = 'ident_switch.err.' . $data['err'];
		}

		// Save data for _after (cannot pass with $args)
		$_SESSION['createData' . self::MY_POSTFIX] = $data;

		return $args;
	}

	function on_identity_create_after($args)
	{
		$rc = rcmail::get_instance();

		// Do not do anything for default identity
		if (strcasecmp($args['record']['email'], $rc->user->data['username']) === 0)
			return $args;

		$data = $_SESSION['createData' . self::MY_POSTFIX];

		unset($_SESSION['createData' . self::MY_POSTFIX]);
		if (!$data || count($data) == 0)
			self::write_log("Object with ident_switch values not found in session for ID = {$args['id']}.");
		else
		{
			$data['id'] = $args['id'];
			self::save_field_values($rc, $data);
		}

		return $args;
	}

	function on_identity_delete($args)
	{
		$rc = rcmail::get_instance();

		$sql = 'DELETE FROM ' . $rc->db->table_name(self::TABLE) . ' WHERE iid = ? AND user_id = ?';
		$q = $rc->db->query($sql, $args['id'], $rc->user->ID);

		if ($rc->db->affected_rows($q))
			self::write_log("Deleted associated information for identity with ID = {$args['id']}.");

		return $args;
	}

	function on_template_object_composeheaders($args)
	{
		if ($args['id'] == '_from')
		{
			$rc = rcmail::get_instance();
			if (strcasecmp($_SESSION['username'], $rc->user->data['username']) !== 0)
			{
				if (isset($_SESSION['iid' . self::MY_POSTFIX]))
				{
					$iid = $_SESSION['iid' . self::MY_POSTFIX];
					$rc->output->add_script("plugin_switchIdent_fixIdent({$iid});", 'docready');
				}
				else
					self::write_log('Special session variable with active identity ID not found.');
			}
		}
	}

	function on_special_folders_form($args)
	{
		$rc = rcmail::get_instance();

		if (($args['section'] == 'folders') &&
		    (strcasecmp($rc->user->data['username'], $_SESSION['username']) !== 0))
		{
			$no_override = array_flip((array)$rc->config->get('dont_override'));
			$onchange = "if ($(this).val() == 'INBOX') $(this).val('')";
			$select = rcmail_action::folder_selector(array('noselection' => '---',
																			'realnames' => true,
																			'maxlength' => 30,
																			'folder_filter' => 'mail',
																			'folder_rights' => 'w'));

			$sql = 'SELECT label FROM ' . $rc->db->table_name(self::TABLE) . ' WHERE iid = ? AND user_id = ?';
			$q = $rc->db->query($sql, $_SESSION['iid' . self::MY_POSTFIX], $rc->user->ID);
			$r = $rc->db->fetch_assoc($q);
			$args['blocks']['main']['name'] .= ' (' . ($r['label'] ? rcube::Q($rc->gettext('server')) . ': ' . $r['label'] : 'remote') . ')';

			foreach (rcube_storage::$folder_types as $type)
			{
				if (isset($no_override[$type . '_mbox']))
					continue;

				$defaultKey = $type . '_mbox_default' . self::MY_POSTFIX;
				$otherKey = $type . '_mbox' . self::MY_POSTFIX;
				$selected = $_SESSION[$otherKey] ? $_SESSION[$otherKey] : $_SESSION[$defaultKey];
				$attr = array('id' => '_' . $type . '_mbox', 'name' => '_' . $type . '_mbox', 'onchange' => $onchange);
				$args['blocks']['main']['options'][$type . '_mbox']['content'] = $select->show($selected, $attr);
			}
		}

		return $args;
	}

	function on_special_folders_update($args)
	{
		$rc = rcmail::get_instance();

		if (($args['section'] == 'folders') &&
		    (strcasecmp($rc->user->data['username'], $_SESSION['username']) !== 0))
		{
			$sql = 'SELECT id FROM ' . $rc->db->table_name(self::TABLE) . ' WHERE iid = ? AND user_id = ?';
			$q = $rc->db->query($sql, $_SESSION['iid' . self::MY_POSTFIX], $rc->user->ID);
			$r = $rc->db->fetch_assoc($q);
			if ($r)
			{
				$sql = 'UPDATE ' .
					$rc->db->table_name(self::TABLE) .
					' SET drafts_mbox = ?, sent_mbox = ?, junk_mbox = ?, trash_mbox = ?' .
					' WHERE id = ?';

				$rc->db->query(
					$sql,
					$args['prefs']['drafts_mbox'],
					$args['prefs']['sent_mbox'],
					$args['prefs']['junk_mbox'],
					$args['prefs']['trash_mbox'],
					$r['id']
				);

				//abuse $plugin['abort'] to prevent RC main from saving prefs
				$args['abort'] = true;
				$args['result'] = true;

				foreach (rcube_storage::$folder_types as $type)
				{
					if ($args['prefs'][$type . '_mbox']) {
						$otherKey = $type . '_mbox' . self::MY_POSTFIX;
						$_SESSION[$otherKey] = $args['prefs'][$type . '_mbox'];
					}
				}
				return $args;
			}

			$args['abort'] = true;
			$args['result'] = false;
			return $args;
		}

		foreach (rcube_storage::$folder_types as $type)
		{
			if ($args['prefs'][$type . '_mbox']) {
				$key = $type . '_mbox_default' . self::MY_POSTFIX;
				$_SESSION[$key] = $args['prefs'][$type . '_mbox'];
			}
		}
		return $args;
	}

	function override_ldap_password($args)
        {
                $rc = rcmail::get_instance();

                // Do not do anything for default identity
                if (strcasecmp($args['user'], $rc->user->data['username']) === 0)
                        return $args;

                $sql = 'SELECT password FROM ' . $rc->db->table_name(self::TABLE) . ' WHERE username = ?';
                $q = $rc->db->query($sql, $args['user']);
                $r = $rc->db->fetch_assoc($q);

                if(is_array($r)) {
                        if($r['password']) {
                                self::write_log('Override imap password for user "' . $args['user'] . '"');
                                // Replace 'new_password' with the password you want to use
                                $args['pass'] = $rc->decrypt($r['password']);
                        }
                }

                return $args;
        }

	private static function check_field_values()
	{
		$retVal = array();

		$retVal['label'] = self::get_field_value('common', 'label');
		if (strlen($retVal['label']) > 32)
			$retVal['err'] = 'label.long';
		else
		{
			$retVal['imap.host'] = self::get_field_value('imap', 'host');
			if (strlen($retVal['imap.host']) > 64)
				$retVal['err'] = 'host.long';
			else
			{
				$retVal['imap.port'] = self::get_field_value('imap', 'port');
				if ($retVal['imap.port'] && !ctype_digit($retVal['imap.port']))
					$retVal['err'] = 'port.num';
				else
				{
					if (isset($retVal['imap.port']) && ($retVal['imap.port'] <= 0 || $retVal['imap.port'] > 65535))
						$retVal['err'] = 'port.range';
					else
					{
						$retVal['imap.delimiter'] = self::get_field_value('imap', 'delimiter');
						if ($retVal['imap.delimiter'] && strlen($retVal['imap.delimiter']) > 1)
							$retVal['err'] = 'delim.long';
						else
						{
							$retVal['imap.user'] = self::get_field_value('imap', 'username');
							if (strlen($retVal['imap.user']) > 64)
								$retVal['err'] = 'user.long';
							else
							{
								$retVal['smtp.host'] = self::get_field_value('smtp', 'host');
								if (strlen($retVal['smtp.host']) > 64)
									$retVal['err'] = 'host.long';
								else
								{
									$retVal['smtp.port'] = self::get_field_value('smtp', 'port');
									if ($retVal['smtp.port'] && !ctype_digit($retVal['smtp.port']))
										$retVal['err'] = 'port.num';
									else
									{
										if (isset($retVal['smtp.port']) && ($retVal['smtp.port'] <= 0 || $retVal['smtp.port'] > 65535))
											$retVal['err'] = 'port.range';
										else
										{
											$retVal['smtp.auth'] = self::get_field_value('smtp', 'auth');
											if (!ctype_digit($retVal['smtp.auth']))
												$retVal['err'] = 'auth.num';
										}
									}
								}
							}
						}
					}
				}
			}
		}

		// Get also password
		$retVal['imap.pass'] = self::get_field_value('imap', 'password', false, true);

		// Parse secure settings
		$retVal['flags'] = self::DB_ENABLED;

		$tls = self::get_field_value('imap', 'tls', false);
		if ($tls)
			$retVal['flags'] |= self::DB_SECURE_IMAP_TLS;

		return $retVal;
	}

	private static function get_field_value($section, $field, $trim = true, $html = false)
	{
		$retVal = rcube_utils::get_input_value(
			"_ident_switch_form_{$section}_{$field}",
			rcube_utils::INPUT_POST,
			$html
		);
		if (!$trim)
			return $retVal;

		if (is_null($retVal))
			return null;

		$s = trim($retVal);
		if (!$s)
			return null;

		return $retVal;
	}

	private static function save_field_values($rc, $data)
	{
		$sql = 'SELECT id, password FROM ' . $rc->db->table_name(self::TABLE) . ' WHERE iid = ? AND user_id = ?';
		$q = $rc->db->query($sql, $data['id'], $rc->user->ID);
		$r = $rc->db->fetch_assoc($q);
		if ($r)
		{ // Record already exists, will update it
			$sql = 'UPDATE ' .
				$rc->db->table_name(self::TABLE) .
				' SET flags = ?, label = ?, imap_host = ?, imap_port = ?, imap_delimiter = ?,'.
				' username = ?, password = ?, smtp_host = ?, smtp_port = ?, smtp_auth = ?,'.
				' user_id = ?, iid = ?' .
				' WHERE id = ?';
		}
		else if ($data['flags'] & self::DB_ENABLED)
		{ // No record exists, create new one
			$sql = 'INSERT INTO ' .
				$rc->db->table_name(self::TABLE) .
				'(flags, label, imap_host, imap_port, imap_delimiter, username, password,'.
				' smtp_host, smtp_port, smtp_auth, user_id, iid)'.
				' VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)';
		}

		if ($sql)
		{
			// Do we need to update pwd?
			if ($data['imap.pass'] != $r['password'])
				$data['imap.pass'] = $rc->encrypt($data['imap.pass']);

			$rc->db->set_debug(true);
			$rc->db->query(
				$sql,
				$data['flags'],
				$data['label'],
				$data['imap.host'],
				$data['imap.port'],
				$data['imap.delimiter'],
				$data['imap.user'],
				$data['imap.pass'],
				$data['smtp.host'],
				$data['smtp.port'],
				$data['smtp.auth'],
				$rc->user->ID,
				$data['id'],
				$r['id']
			);

			return true;
		}

		return false;
	}

	function on_switch()
	{
		$rc = rcmail::get_instance();

		$my_postfix_len = strlen(self::MY_POSTFIX);
		$identId = rcube_utils::get_input_value('_ident-id', rcube_utils::INPUT_POST);

		$rc->session->remove('folders');
		$rc->session->remove('unseen_count');

		if (-1 == $identId)
		{ // Switch to main account
			self::write_log('Switching mailbox back to default.');

			// Restore everything with STORAGE*my_postfix
			foreach ($_SESSION as $k => $v)
			{
				if (strncasecmp($k, 'storage', 7) === 0 && substr_compare($k, self::MY_POSTFIX, -$my_postfix_len, $my_postfix_len) === 0)
				{
					$realKey = substr($k, 0, -$my_postfix_len);
					$_SESSION[$realKey] = $_SESSION[$k];
					$rc->session->remove($k);
				}
			}
			$v; // disable Eclipse warning
			if (!($delimiter = $rc->config->get('imap_delimiter')))
				$delimiter = '.';
			$_SESSION['imap_delimiter'] = $delimiter;
			$_SESSION['username'] = $rc->user->data['username'];
			$_SESSION['password'] = $_SESSION['password' . self::MY_POSTFIX];
			$_SESSION['iid' . self::MY_POSTFIX] = -1;

			foreach (rcube_storage::$folder_types as $type)
			{
				$otherKey = $type . '_mbox' . self::MY_POSTFIX;
				if (isset($_SESSION[$otherKey]))
					$rc->session->remove($otherKey);
			}
		}
		else
		{
			$sql = 'SELECT imap_host, flags, imap_port, imap_delimiter, drafts_mbox, sent_mbox, junk_mbox, trash_mbox, username, password, iid FROM ' . $rc->db->table_name(self::TABLE) . ' WHERE id = ? AND user_id = ?';
			$q = $rc->db->query($sql, $identId ,$rc->user->ID);
			$r = $rc->db->fetch_assoc($q);
			if (is_array($r))
			{
				if (!$r['username'])
				{ // Load email from identity
					$sql = 'SELECT email FROM ' . $rc->db->table_name('identities') . ' WHERE identity_id = ?';
					$q = $rc->db->query($sql, $r['iid']);
					$rIid = $rc->db->fetch_assoc($q);

					$r['username'] = $rIid['email'];
				}

				self::write_log("Switching mailbox to one for identity with ID = {$r['iid']} (username = '{$r['username']}').");

				if ($_SESSION['username'] == $rc->user->data['username'])
				{ // If we are in default account now - save values
					foreach ($_SESSION as $k => $v)
					{
						if (strncasecmp($k, 'storage', 7) === 0 && substr_compare($k, self::MY_POSTFIX, -$my_postfix_len, $my_postfix_len) !== 0)
						{
							if (!isset($_SESSION[$k . self::MY_POSTFIX]))
								$_SESSION[$k . self::MY_POSTFIX] = $_SESSION[$k];

							$rc->session->remove($k);
						}
					}

					$moreToSave = array('password', 'imap_delimiter');
					foreach ($moreToSave as $k)
					{
						if (!isset($_SESSION[$k . self::MY_POSTFIX]))
							$_SESSION[$k . self::MY_POSTFIX] = $_SESSION[$k];

						$rc->session->remove($k);
					}
				}

				$def_port = 143; // Default IMAP port here!
				$ssl = null;
				if ($r['flags'] & self::DB_SECURE_IMAP_TLS)
				{
					$ssl = 'tls';
					$def_port = 143; // Default IMAP TLS port here!
				}
				$port = $r['imap_port'] ? $r['imap_port'] : $def_port;

				$host = $r['imap_host'] ? $r['imap_host'] : 'localhost'; // Default IMAP host here!
				$hostProtocol = "{$ssl}://";
				if ($ssl && strncasecmp($host, $hostProtocol, strlen($hostProtocol)) !== 0)
					$host = $hostProtocol . $host;

				$delimiter = isset($r['imap_delimiter']) ? $r['imap_delimiter'] : $rc->config->get('imap_delimiter'); // Default delimiter here

				$_SESSION['storage_host'] = $host;
				$_SESSION['storage_ssl'] = $ssl;
				$_SESSION['storage_port'] = $port;
				$_SESSION['imap_delimiter'] = $delimiter;
				$_SESSION['username'] = $r['username'];
				$_SESSION['password'] = $r['password'];
				$_SESSION['iid' . self::MY_POSTFIX] = $r['iid'];

				foreach (rcube_storage::$folder_types as $type)
				{
					if (isset($r[$type . '_mbox'])) {
						$otherKey = $type . '_mbox' . self::MY_POSTFIX;
						$_SESSION[$otherKey] = $r[$type . '_mbox'];
					}
				}
			}
			else
			{
				// TODO: Show message in browser
				self::write_log("Requested remote mailbox with ID = {$identId} not found.");
				return;
			}
		}

		$rc->output->redirect(
			array(
				'_task' => 'mail',
				'_mbox' => 'INBOX',
			)
		);
	}

	private static function sw_imap_off($iid)
	{
		$rc = rcmail::get_instance();

		$sql = 'UPDATE ' . $rc->db->table_name(self::TABLE) . ' SET flags = flags & ? WHERE iid = ? AND user_id = ?';
		$rc->db->query($sql, ~self::DB_ENABLED, $iid, $rc->user->ID);
	}

	private function get_preconfig($email)
	{
		$dom = substr(strstr($email, '@'), 1);
		if (!$dom)
			return false;

		$this->load_config(); // config.inc.php

		$cfg = rcmail::get_instance()->config->get('ident_switch.preconfig', array());
		$cfg = isset($cfg[$dom]) ? $cfg[$dom] : false;

		if ($cfg)
		{
			if (!$cfg['host'])
				return false; # Host must be specified!
		}
		return $cfg;
	}

	private function apply_preconfig(&$record)
	{
		if (!isset($record['email']))
			return false;

		$email = $record['email'];
		$cfg = $this->get_preconfig($email);
		if (is_array($cfg))
		{
			self::write_log("Applying predefined configuration for '{$email}'.");

			if ($cfg['host'])
			{ // Parse and set host and related
				$urlArr = parse_url($cfg['host']);

				$record['ident_switch.form.imap.host'] = $record['ident_switch.form.smtp.host'] = $urlArr['host'] ? rcube::Q($urlArr['host'], 'url') : '';
				$record['ident_switch.form.imap.port'] = $record['ident_switch.form.smtp.port'] = $urlArr['port'] ? intval($urlArr['port']) : '';

				if (strcasecmp('tls', $urlArr['scheme']) === 0)
					$record['ident_switch.form.imap.tls'] = true;
				else
					$record['ident_switch.form.imap.rls'] = false;
			}

			$loginSet = false;
			if ($cfg['user'])
			{ // Set up user name
				switch (strtoupper($cfg['user']))
				{
				case 'EMAIL':
					$record['ident_switch.form.imap.username'] = $email;
					$loginSet = true;
					break;
				case 'MBOX':
					$record['ident_switch.form.imap.username'] = strstr($email, '@', true);
					$loginSet = true;
					break;
				}
			}

			if ($cfg['readonly'])
			{
				$record['ident_switch.form.common.readonly'] = 1;
				if ($loginSet)
					$record['ident_switch.form.common.readonly'] = 2;
			}

			return $cfg['readonly'];
		}

		return false;
	}

	private static function write_log($txt)
	{
		if (self::$logging)
			rcmail::get_instance()->write_log('ident_switch', $txt);
	}
}