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<?php
/**
* MediaWiki session user info
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup Session
*/
namespace MediaWiki\Session;
use User;
/**
* Object holding data about a session's user
*
* In general, this class exists for two purposes:
* - User doesn't distinguish between "anonymous user" and "non-anonymous user
* that doesn't exist locally", while we do need to.
* - We also need the "verified" property described below; tracking it via
* another data item to SessionInfo's constructor makes things much more
* confusing.
*
* A UserInfo may be "verified". This indicates that the creator knows that the
* request really comes from that user, whether that's by validating OAuth
* credentials, SSL client certificates, or by having both the user ID and
* token available from cookies.
*
* An "unverified" UserInfo should be used when it's not possible to
* authenticate the user, e.g. the user ID cookie is set but the user Token
* cookie isn't. If the Token is available but doesn't match, don't return a
* UserInfo at all.
*
* @ingroup Session
* @since 1.27
*/
final class UserInfo {
private $verified = false;
/** @var User|null */
private $user = null;
private function __construct( User $user = null, $verified ) {
if ( $user && $user->isAnon() && !User::isUsableName( $user->getName() ) ) {
$this->verified = true;
$this->user = null;
} else {
$this->verified = $verified;
$this->user = $user;
}
}
/**
* Create an instance for an anonymous (i.e. not logged in) user
*
* Logged-out users are always "verified".
*
* @return UserInfo
*/
public static function newAnonymous() {
return new self( null, true );
}
/**
* Create an instance for a logged-in user by ID
* @param int $id User ID
* @param bool $verified True if the user is verified
* @return UserInfo
*/
public static function newFromId( $id, $verified = false ) {
$user = User::newFromId( $id );
// Ensure the ID actually exists
$user->load();
if ( $user->isAnon() ) {
throw new \InvalidArgumentException( 'Invalid ID' );
}
return new self( $user, $verified );
}
/**
* Create an instance for a logged-in user by name
* @param string $name User name (need not exist locally)
* @param bool $verified True if the user is verified
* @return UserInfo
*/
public static function newFromName( $name, $verified = false ) {
$user = User::newFromName( $name, 'usable' );
if ( !$user ) {
throw new \InvalidArgumentException( 'Invalid user name' );
}
return new self( $user, $verified );
}
/**
* Create an instance from an existing User object
* @param User $user (need not exist locally)
* @param bool $verified True if the user is verified
* @return UserInfo
*/
public static function newFromUser( User $user, $verified = false ) {
return new self( $user, $verified );
}
/**
* Return whether this is an anonymous user
* @return bool
*/
public function isAnon() {
return $this->user === null;
}
/**
* Return whether this represents a verified user
* @return bool
*/
public function isVerified() {
return $this->verified;
}
/**
* Return the user ID
* @note Do not use this to test for anonymous users!
* @return int
*/
public function getId() {
return $this->user === null ? 0 : $this->user->getId();
}
/**
* Return the user name
* @return string|null
*/
public function getName() {
return $this->user === null ? null : $this->user->getName();
}
/**
* Return the user token
* @return string
*/
public function getToken() {
return $this->user === null || $this->user->getId() === 0 ? '' : $this->user->getToken( false );
}
/**
* Return a User object
* @return User
*/
public function getUser() {
return $this->user === null ? new User : $this->user;
}
/**
* Return a verified version of this object
* @return UserInfo
*/
public function verified() {
return $this->verified ? $this : new self( $this->user, true );
}
public function __toString() {
if ( $this->user === null ) {
return '<anon>';
}
return '<' .
( $this->verified ? '+' : '-' ) . ':' .
$this->getId() . ':' . $this->getName() .
'>';
}
}