<?php

// LDAP auth plug-in for phpBB 2.2
// $Id$
//
// Authentication plug-ins is largely down to Sergey Kanareykin, our thanks to him.
//
// This is for initial authentication via an LDAP server, user information is then
// obtained from the integrated user table
//
// You can do any kind of checking you like here ... the return data format is
// either the resulting row of user information, an integer zero (indicating an
// inactive user) or some error string
function login_ldap(&$username, &$password)
{
	global $db, $config;

	if (!extension_loaded('ldap'))
	{
		return 'LDAP extension not available';
	}

	if (!($ldap = @ldap_connect($config['ldap_server'])))
	{
		return 'Could not connect to LDAP server';
	}

	$search = @ldap_search($ldap, $config['ldap_base_dn'], $config['ldap_uid'] . '=' . $username, array($config['ldap_uid']));
	$result = @ldap_get_entries($ldap, $search);

	if (is_array($result) && count($result) > 1)
	{
		if (@ldap_bind($ldap, $result[0]['dn'], $password))
		{
			@ldap_close($ldap);

			$sql ='SELECT user_id, username, user_password, user_passchg, user_email, user_type
				FROM ' . USERS_TABLE . "
				WHERE username = '" . $db->sql_escape($username) . "'";
			$result = $db->sql_query($sql);

			if ($row = $db->sql_fetchrow($result))
			{
				$db->sql_freeresult($result);
				return ($row['user_type'] == USER_INACTIVE || $row['user_type'] == USER_IGNORE) ? 0 : $row;
			}
		}
	}

	@ldap_close($ldap);

	return false;
}

// This function is used to output any required fields in the authentication
// admin panel. It also defines any required configuration table fields.
function admin_ldap(&$new)
{
	global $user;

?>
	<tr>
		<td class="row1"><?php echo $user->lang['LDAP_SERVER']; ?>:<br /><span class="gensmall"><?php echo $user->lang['LDAP_SERVER_EXPLAIN']; ?></span></td>
		<td class="row2"><input type="text" size="40" name="ldap_server" value="<?php echo $new['ldap_server']; ?>" /></td>
	</tr>
	<tr>
		<td class="row1"><?php echo $user->lang['LDAP_DN']; ?>:<br /><span class="gensmall"><?php echo $user->lang['LDAP_DN_EXPLAIN']; ?></span></td>
		<td class="row2"><input type="text" size="40" name="ldap_base_dn" value="<?php echo $new['ldap_base_dn']; ?>" /></td>
	</tr>
	<tr>
		<td class="row1"><?php echo $user->lang['LDAP_UID']; ?>:<br /><span class="gensmall"><?php echo $user->lang['LDAP_UID_EXPLAIN']; ?></span></td>
		<td class="row2"><input type="text" size="40" name="ldap_uid" value="<?php echo $new['ldap_uid']; ?>" /></td>
	</tr>
<?php

	// These are fields required in the config table
	return array('ldap_server', 'ldap_base_dn', 'ldap_uid');

}

// Would be nice to allow syncing of 'appropriate' data when user updates
// their username, password, etc. ... should be up to the plugin what data
// is updated.
//
// $mode perhaps being one of NEW, UPDATE, DELETE
function usercp_ldap($mode)
{
	global $db, $config;

}

?>