AuthManager::beginAccountCreation() - Code Metrics - Inspection of "Daily Inspection: Merge "WatchedItemStore: Use cal..." - wikimedia/mediawiki - Measure and Improve Code Quality continuously with Scrutinizer

Completed
Branch — master (62f6c6)

unknown
created 2016-05-29 17:34 UTC
AuthManager::beginAccountCreation() D

↳ Parent: AuthManager
Complexity

Conditions	15
Paths	39
Size

Total Lines	127
Code Lines	82
Duplication

Lines	26
Ratio	20.47 %
Importance

Changes
Metric	Value
cc	15
eloc	82
nc	39
nop	3
dl	26
loc	127
rs	4.9121
c	0
b	0
f	0
How to fix Long Method Complexity

<?php
/**
 * Authentication (and possibly Authorization in the future) system entry point
 *
 * 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 Auth
 */

namespace MediaWiki\Auth;

use Config;
use Psr\Log\LoggerAwareInterface;
use Psr\Log\LoggerInterface;
use Status;
use StatusValue;
use User;
use WebRequest;

/**
 * This serves as the entry point to the authentication system.
 *
 * In the future, it may also serve as the entry point to the authorization
 * system.
 *
 * @ingroup Auth
 * @since 1.27
 */
class AuthManager implements LoggerAwareInterface {
	/** Log in with an existing (not necessarily local) user */
	const ACTION_LOGIN = 'login';
	/** Continue a login process that was interrupted by the need for user input or communication
	 * with an external provider */
	const ACTION_LOGIN_CONTINUE = 'login-continue';
	/** Create a new user */
	const ACTION_CREATE = 'create';
	/** Continue a user creation process that was interrupted by the need for user input or
	 * communication with an external provider */
	const ACTION_CREATE_CONTINUE = 'create-continue';
	/** Link an existing user to a third-party account */
	const ACTION_LINK = 'link';
	/** Continue a user linking process that was interrupted by the need for user input or
	 * communication with an external provider */
	const ACTION_LINK_CONTINUE = 'link-continue';
	/** Change a user's credentials */
	const ACTION_CHANGE = 'change';
	/** Remove a user's credentials */
	const ACTION_REMOVE = 'remove';
	/** Like ACTION_REMOVE but for linking providers only */
	const ACTION_UNLINK = 'unlink';

	/** Security-sensitive operations are ok. */
	const SEC_OK = 'ok';
	/** Security-sensitive operations should re-authenticate. */
	const SEC_REAUTH = 'reauth';
	/** Security-sensitive should not be performed. */
	const SEC_FAIL = 'fail';

	/** Auto-creation is due to SessionManager */
	const AUTOCREATE_SOURCE_SESSION = \MediaWiki\Session\SessionManager::class;

	/** @var AuthManager|null */
	private static $instance = null;

	/** @var WebRequest */
	private $request;

	/** @var Config */
	private $config;

	/** @var LoggerInterface */
	private $logger;

	/** @var AuthenticationProvider[] */
	private $allAuthenticationProviders = [];

	/** @var PreAuthenticationProvider[] */
	private $preAuthenticationProviders = null;

	/** @var PrimaryAuthenticationProvider[] */
	private $primaryAuthenticationProviders = null;

	/** @var SecondaryAuthenticationProvider[] */
	private $secondaryAuthenticationProviders = null;

	/** @var CreatedAccountAuthenticationRequest[] */
	private $createdAccountAuthenticationRequests = [];

	/**
	 * Get the global AuthManager
	 * @return AuthManager
	 */
	public static function singleton() {
		global $wgDisableAuthManager;

		if ( $wgDisableAuthManager ) {
			throw new \BadMethodCallException( '$wgDisableAuthManager is set' );
		}

		if ( self::$instance === null ) {
			self::$instance = new self(
				\RequestContext::getMain()->getRequest(),
				\ConfigFactory::getDefaultInstance()->makeConfig( 'main' )

			);
		}
		return self::$instance;
	}

	/**
	 * @param WebRequest $request
	 * @param Config $config
	 */
	public function __construct( WebRequest $request, Config $config ) {
		$this->request = $request;
		$this->config = $config;
		$this->setLogger( \MediaWiki\Logger\LoggerFactory::getInstance( 'authentication' ) );
	}

	/**
	 * @param LoggerInterface $logger
	 */
	public function setLogger( LoggerInterface $logger ) {
		$this->logger = $logger;
	}

	/**
	 * @return WebRequest
	 */
	public function getRequest() {
		return $this->request;
	}

	/**
	 * Force certain PrimaryAuthenticationProviders
	 * @deprecated For backwards compatibility only
	 * @param PrimaryAuthenticationProvider[] $providers
	 * @param string $why
	 */
	public function forcePrimaryAuthenticationProviders( array $providers, $why ) {
		$this->logger->warning( "Overriding AuthManager primary authn because $why" );

		if ( $this->primaryAuthenticationProviders !== null ) {
			$this->logger->warning(
				'PrimaryAuthenticationProviders have already been accessed! I hope nothing breaks.'
			);

			$this->allAuthenticationProviders = array_diff_key(
				$this->allAuthenticationProviders,
				$this->primaryAuthenticationProviders
			);
			$session = $this->request->getSession();
			$session->remove( 'AuthManager::authnState' );
			$session->remove( 'AuthManager::accountCreationState' );
			$session->remove( 'AuthManager::accountLinkState' );
			$this->createdAccountAuthenticationRequests = [];
		}

		$this->primaryAuthenticationProviders = [];
		foreach ( $providers as $provider ) {
			if ( !$provider instanceof PrimaryAuthenticationProvider ) {
				throw new \RuntimeException(
					'Expected instance of MediaWiki\\Auth\\PrimaryAuthenticationProvider, got ' .
						get_class( $provider )
				);
			}
			$provider->setLogger( $this->logger );
			$provider->setManager( $this );
			$provider->setConfig( $this->config );
			$id = $provider->getUniqueId();
			if ( isset( $this->allAuthenticationProviders[$id] ) ) {
				throw new \RuntimeException(
					"Duplicate specifications for id $id (classes " .
						get_class( $provider ) . ' and ' .
						get_class( $this->allAuthenticationProviders[$id] ) . ')'
				);
			}
			$this->allAuthenticationProviders[$id] = $provider;
			$this->primaryAuthenticationProviders[$id] = $provider;
		}
	}

	/**
	 * Call a legacy AuthPlugin method, if necessary
	 * @codeCoverageIgnore
	 * @deprecated For backwards compatibility only, should be avoided in new code
	 * @param string $method AuthPlugin method to call
	 * @param array $params Parameters to pass
	 * @param mixed $return Return value if AuthPlugin wasn't called
	 * @return mixed Return value from the AuthPlugin method, or $return
	 */
	public static function callLegacyAuthPlugin( $method, array $params, $return = null ) {
		global $wgAuth;

		if ( $wgAuth && !$wgAuth instanceof AuthManagerAuthPlugin ) {
			return call_user_func_array( [ $wgAuth, $method ], $params );
		} else {
			return $return;
		}
	}

	/**
	 * @name Authentication
	 * @{
	 */

	/**
	 * Indicate whether user authentication is possible
	 *
	 * It may not be if the session is provided by something like OAuth
	 * for which each individual request includes authentication data.
	 *
	 * @return bool
	 */
	public function canAuthenticateNow() {
		return $this->request->getSession()->canSetUser();
	}

	/**
	 * Start an authentication flow
	 * @param AuthenticationRequest[] $reqs
	 * @param string $returnToUrl Url that REDIRECT responses should eventually
	 *  return to.
	 * @return AuthenticationResponse See self::continueAuthentication()
	 */
	public function beginAuthentication( array $reqs, $returnToUrl ) {
		$session = $this->request->getSession();
		if ( !$session->canSetUser() ) {
			// Caller should have called canAuthenticateNow()
			$session->remove( 'AuthManager::authnState' );
			throw new \LogicException( 'Authentication is not possible now' );
		}

		$guessUserName = null;
		foreach ( $reqs as $req ) {
			$req->returnToUrl = $returnToUrl;
			// @codeCoverageIgnoreStart
			if ( $req->username !== null && $req->username !== '' ) {
				if ( $guessUserName === null ) {
					$guessUserName = $req->username;
				} elseif ( $guessUserName !== $req->username ) {
					$guessUserName = null;
					break;
				}
			}
			// @codeCoverageIgnoreEnd
		}

		// Check for special-case login of a just-created account
		$req = AuthenticationRequest::getRequestByClass(
			$reqs, CreatedAccountAuthenticationRequest::class
		);
		if ( $req ) {
			if ( !in_array( $req, $this->createdAccountAuthenticationRequests, true ) ) {
				throw new \LogicException(
					'CreatedAccountAuthenticationRequests are only valid on ' .
						'the same AuthManager that created the account'
				);
			}

			$user = User::newFromName( $req->username );
			// @codeCoverageIgnoreStart
			if ( !$user ) {
				throw new \UnexpectedValueException(
					"CreatedAccountAuthenticationRequest had invalid username \"{$req->username}\""
				);
			} elseif ( $user->getId() != $req->id ) {

				throw new \UnexpectedValueException(
					"ID for \"{$req->username}\" was {$user->getId()}, expected {$req->id}"
				);
			}
			// @codeCoverageIgnoreEnd

			$this->logger->info( 'Logging in {user} after account creation', [
				'user' => $user->getName(),
			] );
			$ret = AuthenticationResponse::newPass( $user->getName() );
			$this->setSessionDataForUser( $user );
			$this->callMethodOnProviders( 7, 'postAuthentication', [ $user, $ret ] );
			$session->remove( 'AuthManager::authnState' );
			\Hooks::run( 'AuthManagerLoginAuthenticateAudit', [ $ret, $user, $user->getName() ] );
			return $ret;
		}

		$this->removeAuthenticationSessionData( null );

		foreach ( $this->getPreAuthenticationProviders() as $provider ) {
			$status = $provider->testForAuthentication( $reqs );
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
			if ( !$status->isGood() ) {
				$this->logger->debug( 'Login failed in pre-authentication by ' . $provider->getUniqueId() );
				$ret = AuthenticationResponse::newFail(
					Status::wrap( $status )->getMessage()
				);
				$this->callMethodOnProviders( 7, 'postAuthentication',
					[ User::newFromName( $guessUserName ) ?: null, $ret ]
				);
				\Hooks::run( 'AuthManagerLoginAuthenticateAudit', [ $ret, null, $guessUserName ] );
				return $ret;
			}
		}

		$state = [
			'reqs' => $reqs,
			'returnToUrl' => $returnToUrl,
			'guessUserName' => $guessUserName,
			'primary' => null,
			'primaryResponse' => null,
			'secondary' => [],
			'maybeLink' => [],
			'continueRequests' => [],
		];

		// Preserve state from a previous failed login
		$req = AuthenticationRequest::getRequestByClass(
			$reqs, CreateFromLoginAuthenticationRequest::class
		);
		if ( $req ) {
			$state['maybeLink'] = $req->maybeLink;

		}

		$session = $this->request->getSession();
		$session->setSecret( 'AuthManager::authnState', $state );
		$session->persist();

		return $this->continueAuthentication( $reqs );
	}

	/**
	 * Continue an authentication flow
	 *
	 * Return values are interpreted as follows:
	 * - status FAIL: Authentication failed. If $response->createRequest is
	 *   set, that may be passed to self::beginAuthentication() or to
	 *   self::beginAccountCreation() (after adding a username, if necessary)
	 *   to preserve state.
	 * - status REDIRECT: The client should be redirected to the contained URL,
	 *   new AuthenticationRequests should be made (if any), then
	 *   AuthManager::continueAuthentication() should be called.
	 * - status UI: The client should be presented with a user interface for
	 *   the fields in the specified AuthenticationRequests, then new
	 *   AuthenticationRequests should be made, then
	 *   AuthManager::continueAuthentication() should be called.
	 * - status RESTART: The user logged in successfully with a third-party
	 *   service, but the third-party credentials aren't attached to any local
	 *   account. This could be treated as a UI or a FAIL.
	 * - status PASS: Authentication was successful.
	 *
	 * @param AuthenticationRequest[] $reqs
	 * @return AuthenticationResponse
	 */
	public function continueAuthentication( array $reqs ) {
		$session = $this->request->getSession();
		try {
			if ( !$session->canSetUser() ) {
				// Caller should have called canAuthenticateNow()
				// @codeCoverageIgnoreStart
				throw new \LogicException( 'Authentication is not possible now' );
				// @codeCoverageIgnoreEnd
			}

			$state = $session->getSecret( 'AuthManager::authnState' );
			if ( !is_array( $state ) ) {
				return AuthenticationResponse::newFail(
					wfMessage( 'authmanager-authn-not-in-progress' )
				);
			}
			$state['continueRequests'] = [];

			$guessUserName = $state['guessUserName'];

			foreach ( $reqs as $req ) {
				$req->returnToUrl = $state['returnToUrl'];
			}

			// Step 1: Choose an primary authentication provider, and call it until it succeeds.

			if ( $state['primary'] === null ) {
				// We haven't picked a PrimaryAuthenticationProvider yet
				// @codeCoverageIgnoreStart
				$guessUserName = null;
				foreach ( $reqs as $req ) {
					if ( $req->username !== null && $req->username !== '' ) {
						if ( $guessUserName === null ) {
							$guessUserName = $req->username;
						} elseif ( $guessUserName !== $req->username ) {
							$guessUserName = null;
							break;
						}
					}
				}
				$state['guessUserName'] = $guessUserName;
				// @codeCoverageIgnoreEnd
				$state['reqs'] = $reqs;

				foreach ( $this->getPrimaryAuthenticationProviders() as $id => $provider ) {
					$res = $provider->beginPrimaryAuthentication( $reqs );
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
					switch ( $res->status ) {
						case AuthenticationResponse::PASS;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
							$state['primary'] = $id;
							$state['primaryResponse'] = $res;
							$this->logger->debug( "Primary login with $id succeeded" );
							break 2;
						case AuthenticationResponse::FAIL;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
							$this->logger->debug( "Login failed in primary authentication by $id" );
							if ( $res->createRequest || $state['maybeLink'] ) {
								$res->createRequest = new CreateFromLoginAuthenticationRequest(
									$res->createRequest, $state['maybeLink']
								);
							}
							$this->callMethodOnProviders( 7, 'postAuthentication',
								[ User::newFromName( $guessUserName ) ?: null, $res ]
							);
							$session->remove( 'AuthManager::authnState' );
							\Hooks::run( 'AuthManagerLoginAuthenticateAudit', [ $res, null, $guessUserName ] );
							return $res;
						case AuthenticationResponse::ABSTAIN;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
							// Continue loop
							break;
						case AuthenticationResponse::REDIRECT;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
						case AuthenticationResponse::UI;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
							$this->logger->debug( "Primary login with $id returned $res->status" );
							$state['primary'] = $id;
							$state['continueRequests'] = $res->neededRequests;
							$session->setSecret( 'AuthManager::authnState', $state );
							return $res;

							// @codeCoverageIgnoreStart
						default:
							throw new \DomainException(
								get_class( $provider ) . "::beginPrimaryAuthentication() returned $res->status"
							);
							// @codeCoverageIgnoreEnd
					}
				}
				if ( $state['primary'] === null ) {
					$this->logger->debug( 'Login failed in primary authentication because no provider accepted' );
					$ret = AuthenticationResponse::newFail(
						wfMessage( 'authmanager-authn-no-primary' )
					);
					$this->callMethodOnProviders( 7, 'postAuthentication',
						[ User::newFromName( $guessUserName ) ?: null, $ret ]
					);
					$session->remove( 'AuthManager::authnState' );
					return $ret;
				}
			} elseif ( $state['primaryResponse'] === null ) {
				$provider = $this->getAuthenticationProvider( $state['primary'] );
				if ( !$provider instanceof PrimaryAuthenticationProvider ) {
					// Configuration changed? Force them to start over.
					// @codeCoverageIgnoreStart
					$ret = AuthenticationResponse::newFail(
						wfMessage( 'authmanager-authn-not-in-progress' )
					);
					$this->callMethodOnProviders( 7, 'postAuthentication',
						[ User::newFromName( $guessUserName ) ?: null, $ret ]
					);
					$session->remove( 'AuthManager::authnState' );
					return $ret;
					// @codeCoverageIgnoreEnd
				}
				$id = $provider->getUniqueId();
				$res = $provider->continuePrimaryAuthentication( $reqs );
				switch ( $res->status ) {
					case AuthenticationResponse::PASS;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
						$state['primaryResponse'] = $res;
						$this->logger->debug( "Primary login with $id succeeded" );
						break;
					case AuthenticationResponse::FAIL;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
						$this->logger->debug( "Login failed in primary authentication by $id" );
						if ( $res->createRequest || $state['maybeLink'] ) {
							$res->createRequest = new CreateFromLoginAuthenticationRequest(
								$res->createRequest, $state['maybeLink']
							);
						}
						$this->callMethodOnProviders( 7, 'postAuthentication',
							[ User::newFromName( $guessUserName ) ?: null, $res ]
						);
						$session->remove( 'AuthManager::authnState' );
						\Hooks::run( 'AuthManagerLoginAuthenticateAudit', [ $res, null, $guessUserName ] );
						return $res;
					case AuthenticationResponse::REDIRECT;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
					case AuthenticationResponse::UI;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
						$this->logger->debug( "Primary login with $id returned $res->status" );
						$state['continueRequests'] = $res->neededRequests;
						$session->setSecret( 'AuthManager::authnState', $state );
						return $res;
					default:
						throw new \DomainException(
							get_class( $provider ) . "::continuePrimaryAuthentication() returned $res->status"
						);
				}
			}

			$res = $state['primaryResponse'];
			if ( $res->username === null ) {
				$provider = $this->getAuthenticationProvider( $state['primary'] );
				if ( !$provider instanceof PrimaryAuthenticationProvider ) {
					// Configuration changed? Force them to start over.
					// @codeCoverageIgnoreStart
					$ret = AuthenticationResponse::newFail(
						wfMessage( 'authmanager-authn-not-in-progress' )
					);
					$this->callMethodOnProviders( 7, 'postAuthentication',
						[ User::newFromName( $guessUserName ) ?: null, $ret ]
					);
					$session->remove( 'AuthManager::authnState' );
					return $ret;
					// @codeCoverageIgnoreEnd
				}

				if ( $provider->accountCreationType() === PrimaryAuthenticationProvider::TYPE_LINK &&
					$res->linkRequest &&
					 // don't confuse the user with an incorrect message if linking is disabled
					$this->getAuthenticationProvider( ConfirmLinkSecondaryAuthenticationProvider::class )
				) {
					$state['maybeLink'][$res->linkRequest->getUniqueId()] = $res->linkRequest;
					$msg = 'authmanager-authn-no-local-user-link';
				} else {
					$msg = 'authmanager-authn-no-local-user';
				}
				$this->logger->debug(
					"Primary login with {$provider->getUniqueId()} succeeded, but returned no user"
				);
				$ret = AuthenticationResponse::newRestart( wfMessage( $msg ) );
				$ret->neededRequests = $this->getAuthenticationRequestsInternal(
					self::ACTION_LOGIN,
					[],
					$this->getPrimaryAuthenticationProviders() + $this->getSecondaryAuthenticationProviders()
				);
				if ( $res->createRequest || $state['maybeLink'] ) {
					$ret->createRequest = new CreateFromLoginAuthenticationRequest(
						$res->createRequest, $state['maybeLink']
					);
					$ret->neededRequests[] = $ret->createRequest;
				}
				$session->setSecret( 'AuthManager::authnState', [
					'reqs' => [], // Will be filled in later
					'primary' => null,
					'primaryResponse' => null,
					'secondary' => [],
					'continueRequests' => $ret->neededRequests,
				] + $state );
				return $ret;
			}

			// Step 2: Primary authentication succeeded, create the User object
			// (and add the user locally if necessary)

			$user = User::newFromName( $res->username, 'usable' );
			if ( !$user ) {
				throw new \DomainException(
					get_class( $provider ) . " returned an invalid username: {$res->username}"
				);
			}
			if ( $user->getId() === 0 ) {
				// User doesn't exist locally. Create it.
				$this->logger->info( 'Auto-creating {user} on login', [
					'user' => $user->getName(),
				] );
				$status = $this->autoCreateUser( $user, $state['primary'], false );
				if ( !$status->isGood() ) {
					$ret = AuthenticationResponse::newFail(
						Status::wrap( $status )->getMessage( 'authmanager-authn-autocreate-failed' )
					);
					$this->callMethodOnProviders( 7, 'postAuthentication', [ $user, $ret ] );
					$session->remove( 'AuthManager::authnState' );
					\Hooks::run( 'AuthManagerLoginAuthenticateAudit', [ $ret, $user, $user->getName() ] );
					return $ret;
				}
			}

			// Step 3: Iterate over all the secondary authentication providers.

			$beginReqs = $state['reqs'];

			foreach ( $this->getSecondaryAuthenticationProviders() as $id => $provider ) {
				if ( !isset( $state['secondary'][$id] ) ) {
					// This provider isn't started yet, so we pass it the set
					// of reqs from beginAuthentication instead of whatever
					// might have been used by a previous provider in line.
					$func = 'beginSecondaryAuthentication';
					$res = $provider->beginSecondaryAuthentication( $user, $beginReqs );
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
				} elseif ( !$state['secondary'][$id] ) {
					$func = 'continueSecondaryAuthentication';
					$res = $provider->continueSecondaryAuthentication( $user, $reqs );
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
				} else {
					continue;
				}
				switch ( $res->status ) {
					case AuthenticationResponse::PASS;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
						$this->logger->debug( "Secondary login with $id succeeded" );
						// fall through
					case AuthenticationResponse::ABSTAIN;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
						$state['secondary'][$id] = true;
						break;
					case AuthenticationResponse::FAIL;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
						$this->logger->debug( "Login failed in secondary authentication by $id" );
						$this->callMethodOnProviders( 7, 'postAuthentication', [ $user, $res ] );
						$session->remove( 'AuthManager::authnState' );
						\Hooks::run( 'AuthManagerLoginAuthenticateAudit', [ $res, $user, $user->getName() ] );
						return $res;
					case AuthenticationResponse::REDIRECT;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
					case AuthenticationResponse::UI;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
						$this->logger->debug( "Secondary login with $id returned " . $res->status );
						$state['secondary'][$id] = false;
						$state['continueRequests'] = $res->neededRequests;
						$session->setSecret( 'AuthManager::authnState', $state );
						return $res;

						// @codeCoverageIgnoreStart
					default:
						throw new \DomainException(
							get_class( $provider ) . "::{$func}() returned $res->status"
						);
						// @codeCoverageIgnoreEnd
				}
			}

			// Step 4: Authentication complete! Set the user in the session and
			// clean up.

			$this->logger->info( 'Login for {user} succeeded', [
				'user' => $user->getName(),
			] );
			$req = AuthenticationRequest::getRequestByClass(
				$beginReqs, RememberMeAuthenticationRequest::class
			);
			$this->setSessionDataForUser( $user, $req && $req->rememberMe );

			$ret = AuthenticationResponse::newPass( $user->getName() );
			$this->callMethodOnProviders( 7, 'postAuthentication', [ $user, $ret ] );
			$session->remove( 'AuthManager::authnState' );
			$this->removeAuthenticationSessionData( null );
			\Hooks::run( 'AuthManagerLoginAuthenticateAudit', [ $ret, $user, $user->getName() ] );
			return $ret;
		} catch ( \Exception $ex ) {
			$session->remove( 'AuthManager::authnState' );
			throw $ex;
		}
	}

	/**
	 * Whether security-sensitive operations should proceed.
	 *
	 * A "security-sensitive operation" is something like a password or email
	 * change, that would normally have a "reenter your password to confirm"
	 * box if we only supported password-based authentication.
	 *
	 * @param string $operation Operation being checked. This should be a
	 *  message-key-like string such as 'change-password' or 'change-email'.
	 * @return string One of the SEC_* constants.
	 */
	public function securitySensitiveOperationStatus( $operation ) {
		$status = self::SEC_OK;

		$this->logger->debug( __METHOD__ . ": Checking $operation" );

		$session = $this->request->getSession();
		$aId = $session->getUser()->getId();
		if ( $aId === 0 ) {
			// User isn't authenticated. DWIM?
			$status = $this->canAuthenticateNow() ? self::SEC_REAUTH : self::SEC_FAIL;
			$this->logger->info( __METHOD__ . ": Not logged in! $operation is $status" );
			return $status;
		}

		if ( $session->canSetUser() ) {
			$id = $session->get( 'AuthManager:lastAuthId' );
			$last = $session->get( 'AuthManager:lastAuthTimestamp' );
			if ( $id !== $aId || $last === null ) {
				$timeSinceLogin = PHP_INT_MAX; // Forever ago
			} else {
				$timeSinceLogin = max( 0, time() - $last );
			}

			$thresholds = $this->config->get( 'ReauthenticateTime' );
			if ( isset( $thresholds[$operation] ) ) {
				$threshold = $thresholds[$operation];
			} elseif ( isset( $thresholds['default'] ) ) {
				$threshold = $thresholds['default'];
			} else {
				throw new \UnexpectedValueException( '$wgReauthenticateTime lacks a default' );
			}

			if ( $threshold >= 0 && $timeSinceLogin > $threshold ) {
				$status = self::SEC_REAUTH;
			}
		} else {
			$timeSinceLogin = -1;

			$pass = $this->config->get( 'AllowSecuritySensitiveOperationIfCannotReauthenticate' );
			if ( isset( $pass[$operation] ) ) {
				$status = $pass[$operation] ? self::SEC_OK : self::SEC_FAIL;
			} elseif ( isset( $pass['default'] ) ) {
				$status = $pass['default'] ? self::SEC_OK : self::SEC_FAIL;
			} else {
				throw new \UnexpectedValueException(
					'$wgAllowSecuritySensitiveOperationIfCannotReauthenticate lacks a default'
				);
			}
		}

		\Hooks::run( 'SecuritySensitiveOperationStatus', [
			&$status, $operation, $session, $timeSinceLogin
		] );

		// If authentication is not possible, downgrade from "REAUTH" to "FAIL".
		if ( !$this->canAuthenticateNow() && $status === self::SEC_REAUTH ) {
			$status = self::SEC_FAIL;
		}

		$this->logger->info( __METHOD__ . ": $operation is $status" );

		return $status;
	}

	/**
	 * Determine whether a username can authenticate
	 *
	 * @param string $username
	 * @return bool
	 */
	public function userCanAuthenticate( $username ) {
		foreach ( $this->getPrimaryAuthenticationProviders() as $provider ) {
			if ( $provider->testUserCanAuthenticate( $username ) ) {
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
				return true;
			}
		}
		return false;
	}

	/**
	 * Provide normalized versions of the username for security checks
	 *
	 * Since different providers can normalize the input in different ways,
	 * this returns an array of all the different ways the name might be
	 * normalized for authentication.
	 *
	 * The returned strings should not be revealed to the user, as that might
	 * leak private information (e.g. an email address might be normalized to a
	 * username).
	 *
	 * @param string $username
	 * @return string[]
	 */
	public function normalizeUsername( $username ) {
		$ret = [];
		foreach ( $this->getPrimaryAuthenticationProviders() as $provider ) {
			$normalized = $provider->providerNormalizeUsername( $username );
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
			if ( $normalized !== null ) {
				$ret[$normalized] = true;
			}
		}
		return array_keys( $ret );
	}

	/**@}*/

	/**
	 * @name Authentication data changing
	 * @{
	 */

	/**
	 * Revoke any authentication credentials for a user
	 *
	 * After this, the user should no longer be able to log in.
	 *
	 * @param string $username
	 */
	public function revokeAccessForUser( $username ) {
		$this->logger->info( 'Revoking access for {user}', [
			'user' => $username,
		] );
		$this->callMethodOnProviders( 6, 'providerRevokeAccessForUser', [ $username ] );
	}

	/**
	 * Validate a change of authentication data (e.g. passwords)
	 * @param AuthenticationRequest $req
	 * @param bool $checkData If false, $req hasn't been loaded from the
	 *  submission so checks on user-submitted fields should be skipped. $req->username is
	 *  considered user-submitted for this purpose, even if it cannot be changed via
	 *  $req->loadFromSubmission.
	 * @return Status
	 */
	public function allowsAuthenticationDataChange( AuthenticationRequest $req, $checkData = true ) {
		$any = false;
		$providers = $this->getPrimaryAuthenticationProviders() +
			$this->getSecondaryAuthenticationProviders();
		foreach ( $providers as $provider ) {
			$status = $provider->providerAllowsAuthenticationDataChange( $req, $checkData );
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
			if ( !$status->isGood() ) {
				return Status::wrap( $status );
			}
			$any = $any || $status->value !== 'ignored';
		}
		if ( !$any ) {
			$status = Status::newGood( 'ignored' );
			$status->warning( 'authmanager-change-not-supported' );
			return $status;
		}
		return Status::newGood();
	}

	/**
	 * Change authentication data (e.g. passwords)
	 *
	 * If $req was returned for AuthManager::ACTION_CHANGE, using $req should
	 * result in a successful login in the future.
	 *
	 * If $req was returned for AuthManager::ACTION_REMOVE, using $req should
	 * no longer result in a successful login.
	 *
	 * @param AuthenticationRequest $req
	 */
	public function changeAuthenticationData( AuthenticationRequest $req ) {
		$this->logger->info( 'Changing authentication data for {user} class {what}', [
			'user' => is_string( $req->username ) ? $req->username : '<no name>',
			'what' => get_class( $req ),
		] );

		$this->callMethodOnProviders( 6, 'providerChangeAuthenticationData', [ $req ] );

		// When the main account's authentication data is changed, invalidate
		// all BotPasswords too.
		\BotPassword::invalidateAllPasswordsForUser( $req->username );
	}

	/**@}*/

	/**
	 * @name Account creation
	 * @{
	 */

	/**
	 * Determine whether accounts can be created
	 * @return bool
	 */
	public function canCreateAccounts() {
		foreach ( $this->getPrimaryAuthenticationProviders() as $provider ) {
			switch ( $provider->accountCreationType() ) {
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
				case PrimaryAuthenticationProvider::TYPE_CREATE:
				case PrimaryAuthenticationProvider::TYPE_LINK:
					return true;
			}
		}
		return false;
	}

	/**
	 * Determine whether a particular account can be created
	 * @param string $username
	 * @param int $flags Bitfield of User:READ_* constants
	 * @return Status
	 */
	public function canCreateAccount( $username, $flags = User::READ_NORMAL ) {
		if ( !$this->canCreateAccounts() ) {
			return Status::newFatal( 'authmanager-create-disabled' );
		}

		if ( $this->userExists( $username, $flags ) ) {
			return Status::newFatal( 'userexists' );
		}

		$user = User::newFromName( $username, 'creatable' );
		if ( !is_object( $user ) ) {
			return Status::newFatal( 'noname' );
		} else {
			$user->load( $flags ); // Explicitly load with $flags, auto-loading always uses READ_NORMAL
			if ( $user->getId() !== 0 ) {
				return Status::newFatal( 'userexists' );
			}
		}

		// Denied by providers?
		$providers = $this->getPreAuthenticationProviders() +
			$this->getPrimaryAuthenticationProviders() +
			$this->getSecondaryAuthenticationProviders();
		foreach ( $providers as $provider ) {
			$status = $provider->testUserForCreation( $user, false );
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
			if ( !$status->isGood() ) {
				return Status::wrap( $status );
			}
		}

		return Status::newGood();
	}

	/**
	 * Basic permissions checks on whether a user can create accounts
	 * @param User $creator User doing the account creation
	 * @return Status
	 */
	public function checkAccountCreatePermissions( User $creator ) {
		// Wiki is read-only?
		if ( wfReadOnly() ) {
			return Status::newFatal( 'readonlytext', wfReadOnlyReason() );
		}

		// This is awful, this permission check really shouldn't go through Title.
		$permErrors = \SpecialPage::getTitleFor( 'CreateAccount' )
			->getUserPermissionsErrors( 'createaccount', $creator, 'secure' );
		if ( $permErrors ) {
			$status = Status::newGood();
			foreach ( $permErrors as $args ) {
				call_user_func_array( [ $status, 'fatal' ], $args );
			}
			return $status;
		}

		$block = $creator->isBlockedFromCreateAccount();
		if ( $block ) {
			$errorParams = [
				$block->getTarget(),
				$block->mReason ?: wfMessage( 'blockednoreason' )->text(),
				$block->getByName()
			];

			if ( $block->getType() === \Block::TYPE_RANGE ) {
				$errorMessage = 'cantcreateaccount-range-text';
				$errorParams[] = $this->getRequest()->getIP();
			} else {
				$errorMessage = 'cantcreateaccount-text';
			}

			return Status::newFatal( wfMessage( $errorMessage, $errorParams ) );
		}

		$ip = $this->getRequest()->getIP();
		if ( $creator->isDnsBlacklisted( $ip, true /* check $wgProxyWhitelist */ ) ) {
			return Status::newFatal( 'sorbs_create_account_reason' );
		}

		return Status::newGood();
	}

	/**
	 * Start an account creation flow
	 * @param User $creator User doing the account creation
	 * @param AuthenticationRequest[] $reqs
	 * @param string $returnToUrl Url that REDIRECT responses should eventually
	 *  return to.
	 * @return AuthenticationResponse
	 */
	public function beginAccountCreation( User $creator, array $reqs, $returnToUrl ) {
		$session = $this->request->getSession();
		if ( !$this->canCreateAccounts() ) {
			// Caller should have called canCreateAccounts()
			$session->remove( 'AuthManager::accountCreationState' );
			throw new \LogicException( 'Account creation is not possible' );
		}

		try {
			$username = AuthenticationRequest::getUsernameFromRequests( $reqs );
		} catch ( \UnexpectedValueException $ex ) {
			$username = null;
		}
		if ( $username === null ) {
			$this->logger->debug( __METHOD__ . ': No username provided' );
			return AuthenticationResponse::newFail( wfMessage( 'noname' ) );
		}

		// Permissions check
		$status = $this->checkAccountCreatePermissions( $creator );
		if ( !$status->isGood() ) {
			$this->logger->debug( __METHOD__ . ': {creator} cannot create users: {reason}', [
				'user' => $username,
				'creator' => $creator->getName(),
				'reason' => $status->getWikiText( null, null, 'en' )
			] );
			return AuthenticationResponse::newFail( $status->getMessage() );
		}

		$status = $this->canCreateAccount( $username, User::READ_LOCKING );
		if ( !$status->isGood() ) {
			$this->logger->debug( __METHOD__ . ': {user} cannot be created: {reason}', [
				'user' => $username,
				'creator' => $creator->getName(),
				'reason' => $status->getWikiText( null, null, 'en' )
			] );
			return AuthenticationResponse::newFail( $status->getMessage() );
		}

		$user = User::newFromName( $username, 'creatable' );
		foreach ( $reqs as $req ) {
			$req->username = $username;
			$req->returnToUrl = $returnToUrl;
			if ( $req instanceof UserDataAuthenticationRequest ) {
				$status = $req->populateUser( $user );
<?php

function getDate($date)
{
    if ($date !== null) {
        return new DateTime($date);
    }

    return false;
}
				if ( !$status->isGood() ) {
					$status = Status::wrap( $status );
					$session->remove( 'AuthManager::accountCreationState' );
					$this->logger->debug( __METHOD__ . ': UserData is invalid: {reason}', [
						'user' => $user->getName(),
						'creator' => $creator->getName(),
						'reason' => $status->getWikiText( null, null, 'en' ),
					] );
					return AuthenticationResponse::newFail( $status->getMessage() );
				}
			}
		}

		$this->removeAuthenticationSessionData( null );

		$state = [
			'username' => $username,
			'userid' => 0,
			'creatorid' => $creator->getId(),
			'creatorname' => $creator->getName(),
			'reqs' => $reqs,
			'returnToUrl' => $returnToUrl,
			'primary' => null,
			'primaryResponse' => null,
			'secondary' => [],
			'continueRequests' => [],
			'maybeLink' => [],
			'ranPreTests' => false,
		];

		// Special case: converting a login to an account creation
		$req = AuthenticationRequest::getRequestByClass(
			$reqs, CreateFromLoginAuthenticationRequest::class
		);
		if ( $req ) {
			$state['maybeLink'] = $req->maybeLink;


			// If we get here, the user didn't submit a form with any of the
			// usual AuthenticationRequests that are needed for an account
			// creation. So we need to determine if there are any and return a
			// UI response if so.
			if ( $req->createRequest ) {

				// We have a createRequest from a
				// PrimaryAuthenticationProvider, so don't ask.
				$providers = $this->getPreAuthenticationProviders() +
					$this->getSecondaryAuthenticationProviders();
			} else {
				// We're only preserving maybeLink, so ask for primary fields
				// too.
				$providers = $this->getPreAuthenticationProviders() +
					$this->getPrimaryAuthenticationProviders() +
					$this->getSecondaryAuthenticationProviders();
			}
			$reqs = $this->getAuthenticationRequestsInternal(
				self::ACTION_CREATE,
				[],
				$providers
			);
			// See if we need any requests to begin
			foreach ( (array)$reqs as $r ) {
				if ( !$r instanceof UsernameAuthenticationRequest &&
					!$r instanceof UserDataAuthenticationRequest &&
					!$r instanceof CreationReasonAuthenticationRequest
				) {
					// Needs some reqs, so request them
					$reqs[] = new CreateFromLoginAuthenticationRequest( $req->createRequest, [] );
					$state['continueRequests'] = $reqs;
					$session->setSecret( 'AuthManager::accountCreationState', $state );
					$session->persist();
					return AuthenticationResponse::newUI( $reqs, wfMessage( 'authmanager-create-from-login' ) );
				}
			}
			// No reqs needed, so we can just continue.
			$req->createRequest->returnToUrl = $returnToUrl;
			$reqs = [ $req->createRequest ];
		}

		$session->setSecret( 'AuthManager::accountCreationState', $state );
		$session->persist();

		return $this->continueAccountCreation( $reqs );
	}

	/**
	 * Continue an account creation flow
	 * @param AuthenticationRequest[] $reqs
	 * @return AuthenticationResponse
	 */
	public function continueAccountCreation( array $reqs ) {
		$session = $this->request->getSession();
		try {
			if ( !$this->canCreateAccounts() ) {
				// Caller should have called canCreateAccounts()
				$session->remove( 'AuthManager::accountCreationState' );
				throw new \LogicException( 'Account creation is not possible' );
			}

			$state = $session->getSecret( 'AuthManager::accountCreationState' );
			if ( !is_array( $state ) ) {
				return AuthenticationResponse::newFail(
					wfMessage( 'authmanager-create-not-in-progress' )
				);
			}
			$state['continueRequests'] = [];

			// Step 0: Prepare and validate the input

			$user = User::newFromName( $state['username'], 'creatable' );
			if ( !is_object( $user ) ) {
				$session->remove( 'AuthManager::accountCreationState' );
				$this->logger->debug( __METHOD__ . ': Invalid username', [
					'user' => $state['username'],
				] );
				return AuthenticationResponse::newFail( wfMessage( 'noname' ) );
			}

			if ( $state['creatorid'] ) {
				$creator = User::newFromId( $state['creatorid'] );
			} else {
				$creator = new User;
				$creator->setName( $state['creatorname'] );
			}

			// Avoid account creation races on double submissions
			$cache = \ObjectCache::getLocalClusterInstance();
			$lock = $cache->getScopedLock( $cache->makeGlobalKey( 'account', md5( $user->getName() ) ) );
			if ( !$lock ) {
				// Don't clear AuthManager::accountCreationState for this code
				// path because the process that won the race owns it.
				$this->logger->debug( __METHOD__ . ': Could not acquire account creation lock', [
					'user' => $user->getName(),
					'creator' => $creator->getName(),
				] );
				return AuthenticationResponse::newFail( wfMessage( 'usernameinprogress' ) );
			}

			// Permissions check
			$status = $this->checkAccountCreatePermissions( $creator );
			if ( !$status->isGood() ) {
				$this->logger->debug( __METHOD__ . ': {creator} cannot create users: {reason}', [
					'user' => $user->getName(),
					'creator' => $creator->getName(),
					'reason' => $status->getWikiText( null, null, 'en' )
				] );
				$ret = AuthenticationResponse::newFail( $status->getMessage() );
				$this->callMethodOnProviders( 7, 'postAccountCreation', [ $user, $creator, $ret ] );
				$session->remove( 'AuthManager::accountCreationState' );
				return $ret;
			}

			// Load from master for existence check
			$user->load( User::READ_LOCKING );

			if ( $state['userid'] === 0 ) {
				if ( $user->getId() != 0 ) {
					$this->logger->debug( __METHOD__ . ': User exists locally', [
						'user' => $user->getName(),
						'creator' => $creator->getName(),
					] );
					$ret = AuthenticationResponse::newFail( wfMessage( 'userexists' ) );
					$this->callMethodOnProviders( 7, 'postAccountCreation', [ $user, $creator, $ret ] );
					$session->remove( 'AuthManager::accountCreationState' );
					return $ret;
				}
			} else {
				if ( $user->getId() == 0 ) {
					$this->logger->debug( __METHOD__ . ': User does not exist locally when it should', [
						'user' => $user->getName(),
						'creator' => $creator->getName(),
						'expected_id' => $state['userid'],
					] );
					throw new \UnexpectedValueException(
						"User \"{$state['username']}\" should exist now, but doesn't!"
					);
				}
				if ( $user->getId() != $state['userid'] ) {
					$this->logger->debug( __METHOD__ . ': User ID/name mismatch', [
						'user' => $user->getName(),
						'creator' => $creator->getName(),
						'expected_id' => $state['userid'],
						'actual_id' => $user->getId(),
					] );
					throw new \UnexpectedValueException(
						"User \"{$state['username']}\" exists, but " .
							"ID {$user->getId()} != {$state['userid']}!"
					);
				}
			}
			foreach ( $state['reqs'] as $req ) {
				if ( $req instanceof UserDataAuthenticationRequest ) {
					$status = $req->populateUser( $user );
					if ( !$status->isGood() ) {
						// This should never happen...
						$status = Status::wrap( $status );
						$this->logger->debug( __METHOD__ . ': UserData is invalid: {reason}', [
							'user' => $user->getName(),
							'creator' => $creator->getName(),
							'reason' => $status->getWikiText( null, null, 'en' ),
						] );
						$ret = AuthenticationResponse::newFail( $status->getMessage() );
						$this->callMethodOnProviders( 7, 'postAccountCreation', [ $user, $creator, $ret ] );
						$session->remove( 'AuthManager::accountCreationState' );
						return $ret;
					}
				}
			}

			foreach ( $reqs as $req ) {
				$req->returnToUrl = $state['returnToUrl'];
				$req->username = $state['username'];
			}

			// If we're coming in from a create-from-login UI response, we need
			// to extract the createRequest (if any).
			$req = AuthenticationRequest::getRequestByClass(
				$reqs, CreateFromLoginAuthenticationRequest::class
			);
			if ( $req && $req->createRequest ) {
				$reqs[] = $req->createRequest;

			}

			// Run pre-creation tests, if we haven't already
			if ( !$state['ranPreTests'] ) {
				$providers = $this->getPreAuthenticationProviders() +
					$this->getPrimaryAuthenticationProviders() +
					$this->getSecondaryAuthenticationProviders();
				foreach ( $providers as $id => $provider ) {
					$status = $provider->testForAccountCreation( $user, $creator, $reqs );
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
					if ( !$status->isGood() ) {
						$this->logger->debug( __METHOD__ . ": Fail in pre-authentication by $id", [
							'user' => $user->getName(),
							'creator' => $creator->getName(),
						] );
						$ret = AuthenticationResponse::newFail(
							Status::wrap( $status )->getMessage()
						);
						$this->callMethodOnProviders( 7, 'postAccountCreation', [ $user, $creator, $ret ] );
						$session->remove( 'AuthManager::accountCreationState' );
						return $ret;
					}
				}

				$state['ranPreTests'] = true;
			}

			// Step 1: Choose a primary authentication provider and call it until it succeeds.

			if ( $state['primary'] === null ) {
				// We haven't picked a PrimaryAuthenticationProvider yet
				foreach ( $this->getPrimaryAuthenticationProviders() as $id => $provider ) {
					if ( $provider->accountCreationType() === PrimaryAuthenticationProvider::TYPE_NONE ) {
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
						continue;
					}
					$res = $provider->beginPrimaryAccountCreation( $user, $creator, $reqs );
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
					switch ( $res->status ) {
						case AuthenticationResponse::PASS;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
							$this->logger->debug( __METHOD__ . ": Primary creation passed by $id", [
								'user' => $user->getName(),
								'creator' => $creator->getName(),
							] );
							$state['primary'] = $id;
							$state['primaryResponse'] = $res;
							break 2;
						case AuthenticationResponse::FAIL;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
							$this->logger->debug( __METHOD__ . ": Primary creation failed by $id", [
								'user' => $user->getName(),
								'creator' => $creator->getName(),
							] );
							$this->callMethodOnProviders( 7, 'postAccountCreation', [ $user, $creator, $res ] );
							$session->remove( 'AuthManager::accountCreationState' );
							return $res;
						case AuthenticationResponse::ABSTAIN;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
							// Continue loop
							break;
						case AuthenticationResponse::REDIRECT;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
						case AuthenticationResponse::UI;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
							$this->logger->debug( __METHOD__ . ": Primary creation $res->status by $id", [
								'user' => $user->getName(),
								'creator' => $creator->getName(),
							] );
							$state['primary'] = $id;
							$state['continueRequests'] = $res->neededRequests;
							$session->setSecret( 'AuthManager::accountCreationState', $state );
							return $res;

							// @codeCoverageIgnoreStart
						default:
							throw new \DomainException(
								get_class( $provider ) . "::beginPrimaryAccountCreation() returned $res->status"
							);
							// @codeCoverageIgnoreEnd
					}
				}
				if ( $state['primary'] === null ) {
					$this->logger->debug( __METHOD__ . ': Primary creation failed because no provider accepted', [
						'user' => $user->getName(),
						'creator' => $creator->getName(),
					] );
					$ret = AuthenticationResponse::newFail(
						wfMessage( 'authmanager-create-no-primary' )
					);
					$this->callMethodOnProviders( 7, 'postAccountCreation', [ $user, $creator, $ret ] );
					$session->remove( 'AuthManager::accountCreationState' );
					return $ret;
				}
			} elseif ( $state['primaryResponse'] === null ) {
				$provider = $this->getAuthenticationProvider( $state['primary'] );
				if ( !$provider instanceof PrimaryAuthenticationProvider ) {
					// Configuration changed? Force them to start over.
					// @codeCoverageIgnoreStart
					$ret = AuthenticationResponse::newFail(
						wfMessage( 'authmanager-create-not-in-progress' )
					);
					$this->callMethodOnProviders( 7, 'postAccountCreation', [ $user, $creator, $ret ] );
					$session->remove( 'AuthManager::accountCreationState' );
					return $ret;
					// @codeCoverageIgnoreEnd
				}
				$id = $provider->getUniqueId();
				$res = $provider->continuePrimaryAccountCreation( $user, $creator, $reqs );
				switch ( $res->status ) {
					case AuthenticationResponse::PASS;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
						$this->logger->debug( __METHOD__ . ": Primary creation passed by $id", [
							'user' => $user->getName(),
							'creator' => $creator->getName(),
						] );
						$state['primaryResponse'] = $res;
						break;
					case AuthenticationResponse::FAIL;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
						$this->logger->debug( __METHOD__ . ": Primary creation failed by $id", [
							'user' => $user->getName(),
							'creator' => $creator->getName(),
						] );
						$this->callMethodOnProviders( 7, 'postAccountCreation', [ $user, $creator, $res ] );
						$session->remove( 'AuthManager::accountCreationState' );
						return $res;
					case AuthenticationResponse::REDIRECT;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
					case AuthenticationResponse::UI;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
						$this->logger->debug( __METHOD__ . ": Primary creation $res->status by $id", [
							'user' => $user->getName(),
							'creator' => $creator->getName(),
						] );
						$state['continueRequests'] = $res->neededRequests;
						$session->setSecret( 'AuthManager::accountCreationState', $state );
						return $res;
					default:
						throw new \DomainException(
							get_class( $provider ) . "::continuePrimaryAccountCreation() returned $res->status"
						);
				}
			}

			// Step 2: Primary authentication succeeded, create the User object
			// and add the user locally.

			if ( $state['userid'] === 0 ) {
				$this->logger->info( 'Creating user {user} during account creation', [
					'user' => $user->getName(),
					'creator' => $creator->getName(),
				] );
				$status = $user->addToDatabase();
				if ( !$status->isOk() ) {
					// @codeCoverageIgnoreStart
					$ret = AuthenticationResponse::newFail( $status->getMessage() );
					$this->callMethodOnProviders( 7, 'postAccountCreation', [ $user, $creator, $ret ] );
					$session->remove( 'AuthManager::accountCreationState' );
					return $ret;
					// @codeCoverageIgnoreEnd
				}
				$this->setDefaultUserOptions( $user, $creator->isAnon() );
				\Hooks::run( 'LocalUserCreated', [ $user, false ] );
				$user->saveSettings();
				$state['userid'] = $user->getId();

				// Update user count
				\DeferredUpdates::addUpdate( new \SiteStatsUpdate( 0, 0, 0, 0, 1 ) );

				// Watch user's userpage and talk page
				$user->addWatch( $user->getUserPage(), User::IGNORE_USER_RIGHTS );

				// Inform the provider
				$logSubtype = $provider->finishAccountCreation( $user, $creator, $state['primaryResponse'] );
function myFunction($a) {
    switch ($a) {
        case 'foo':
            $x = 1;
            break;

        case 'bar':
            $x = 2;
            break;
    }

    // $x is potentially undefined here.
    echo $x;
}

				// Log the creation
				if ( $this->config->get( 'NewUserLog' ) ) {
					$isAnon = $creator->isAnon();
					$logEntry = new \ManualLogEntry(
						'newusers',
						$logSubtype ?: ( $isAnon ? 'create' : 'create2' )
					);
					$logEntry->setPerformer( $isAnon ? $user : $creator );
					$logEntry->setTarget( $user->getUserPage() );
					$req = AuthenticationRequest::getRequestByClass(
						$state['reqs'], CreationReasonAuthenticationRequest::class
					);
					$logEntry->setComment( $req ? $req->reason : '' );

					$logEntry->setParameters( [
						'4::userid' => $user->getId(),
					] );
					$logid = $logEntry->insert();
					$logEntry->publish( $logid );
				}
			}

			// Step 3: Iterate over all the secondary authentication providers.

			$beginReqs = $state['reqs'];

			foreach ( $this->getSecondaryAuthenticationProviders() as $id => $provider ) {
				if ( !isset( $state['secondary'][$id] ) ) {
					// This provider isn't started yet, so we pass it the set
					// of reqs from beginAuthentication instead of whatever
					// might have been used by a previous provider in line.
					$func = 'beginSecondaryAccountCreation';
					$res = $provider->beginSecondaryAccountCreation( $user, $creator, $beginReqs );
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
				} elseif ( !$state['secondary'][$id] ) {
					$func = 'continueSecondaryAccountCreation';
					$res = $provider->continueSecondaryAccountCreation( $user, $creator, $reqs );
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
				} else {
					continue;
				}
				switch ( $res->status ) {
					case AuthenticationResponse::PASS;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
						$this->logger->debug( __METHOD__ . ": Secondary creation passed by $id", [
							'user' => $user->getName(),
							'creator' => $creator->getName(),
						] );
						// fall through
					case AuthenticationResponse::ABSTAIN;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
						$state['secondary'][$id] = true;
						break;
					case AuthenticationResponse::REDIRECT;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
					case AuthenticationResponse::UI;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
						$this->logger->debug( __METHOD__ . ": Secondary creation $res->status by $id", [
							'user' => $user->getName(),
							'creator' => $creator->getName(),
						] );
						$state['secondary'][$id] = false;
						$state['continueRequests'] = $res->neededRequests;
						$session->setSecret( 'AuthManager::accountCreationState', $state );
						return $res;
					case AuthenticationResponse::FAIL;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
						throw new \DomainException(
							get_class( $provider ) . "::{$func}() returned $res->status." .
							' Secondary providers are not allowed to fail account creation, that' .
							' should have been done via testForAccountCreation().'
						);
							// @codeCoverageIgnoreStart
					default:
						throw new \DomainException(
							get_class( $provider ) . "::{$func}() returned $res->status"
						);
							// @codeCoverageIgnoreEnd
				}
			}

			$id = $user->getId();
			$name = $user->getName();
			$req = new CreatedAccountAuthenticationRequest( $id, $name );
			$ret = AuthenticationResponse::newPass( $name );
			$ret->loginRequest = $req;
			$this->createdAccountAuthenticationRequests[] = $req;

			$this->logger->info( __METHOD__ . ': Account creation succeeded for {user}', [
				'user' => $user->getName(),
				'creator' => $creator->getName(),
			] );

			$this->callMethodOnProviders( 7, 'postAccountCreation', [ $user, $creator, $ret ] );
			$session->remove( 'AuthManager::accountCreationState' );
			$this->removeAuthenticationSessionData( null );
			return $ret;
		} catch ( \Exception $ex ) {
			$session->remove( 'AuthManager::accountCreationState' );
			throw $ex;
		}
	}

	/**
	 * Auto-create an account, and log into that account
	 * @param User $user User to auto-create
	 * @param string $source What caused the auto-creation? This must be the ID
	 *  of a PrimaryAuthenticationProvider or the constant self::AUTOCREATE_SOURCE_SESSION.
	 * @param bool $login Whether to also log the user in
	 * @return Status Good if user was created, Ok if user already existed, otherwise Fatal
	 */
	public function autoCreateUser( User $user, $source, $login = true ) {
// Bad
class Router
{
    public function generate($path)
    {
        return $_SERVER['HOST'].$path;
    }
}

// Better
class Router
{
    private $host;

    public function __construct($host)
    {
        $this->host = $host;
    }

    public function generate($path)
    {
        return $this->host.$path;
    }
}

class Controller
{
    public function myAction(Request $request)
    {
        // Instead of
        $page = isset($_GET['page']) ? intval($_GET['page']) : 1;

        // Better (assuming you use the Symfony2 request)
        $page = $request->query->get('page', 1);
    }
}
		if ( $source !== self::AUTOCREATE_SOURCE_SESSION &&
			!$this->getAuthenticationProvider( $source ) instanceof PrimaryAuthenticationProvider
		) {
			throw new \InvalidArgumentException( "Unknown auto-creation source: $source" );
		}

		$username = $user->getName();

		// Try the local user from the slave DB
		$localId = User::idFromName( $username );
		$flags = User::READ_NORMAL;

		// Fetch the user ID from the master, so that we don't try to create the user
		// when they already exist, due to replication lag
		// @codeCoverageIgnoreStart
		if ( !$localId && wfGetLB()->getReaderIndex() != 0 ) {
0   == false // true
0   == null  // true
123 == false // false
123 == null  // false

// It is often better to use strict comparison
0 === false // false
0 === null  // false
			$localId = User::idFromName( $username, User::READ_LATEST );
			$flags = User::READ_LATEST;
		}
		// @codeCoverageIgnoreEnd

		if ( $localId ) {
0   == false // true
0   == null  // true
123 == false // false
123 == null  // false

// It is often better to use strict comparison
0 === false // false
0 === null  // false
			$this->logger->debug( __METHOD__ . ': {username} already exists locally', [
				'username' => $username,
			] );
			$user->setId( $localId );
			$user->loadFromId( $flags );
			if ( $login ) {
				$this->setSessionDataForUser( $user );
			}
			$status = Status::newGood();
			$status->warning( 'userexists' );
			return $status;
		}

		// Wiki is read-only?
		if ( wfReadOnly() ) {
			$this->logger->debug( __METHOD__ . ': denied by wfReadOnly(): {reason}', [
				'username' => $username,
				'reason' => wfReadOnlyReason(),
			] );
			$user->setId( 0 );
			$user->loadFromId();
			return Status::newFatal( 'readonlytext', wfReadOnlyReason() );
		}

		// Check the session, if we tried to create this user already there's
		// no point in retrying.
		$session = $this->request->getSession();
		if ( $session->get( 'AuthManager::AutoCreateBlacklist' ) ) {
			$this->logger->debug( __METHOD__ . ': blacklisted in session {sessionid}', [
				'username' => $username,
				'sessionid' => $session->getId(),
			] );
			$user->setId( 0 );
			$user->loadFromId();
			$reason = $session->get( 'AuthManager::AutoCreateBlacklist' );
			if ( $reason instanceof StatusValue ) {
				return Status::wrap( $reason );
			} else {
				return Status::newFatal( $reason );
			}
		}

		// Is the username creatable?
		if ( !User::isCreatableName( $username ) ) {
			$this->logger->debug( __METHOD__ . ': name "{username}" is not creatable', [
				'username' => $username,
			] );
			$session->set( 'AuthManager::AutoCreateBlacklist', 'noname', 600 );
			$user->setId( 0 );
			$user->loadFromId();
			return Status::newFatal( 'noname' );
		}

		// Is the IP user able to create accounts?
		$anon = new User;
		if ( !$anon->isAllowedAny( 'createaccount', 'autocreateaccount' ) ) {
			$this->logger->debug( __METHOD__ . ': IP lacks the ability to create or autocreate accounts', [
				'username' => $username,
				'ip' => $anon->getName(),
			] );
			$session->set( 'AuthManager::AutoCreateBlacklist', 'authmanager-autocreate-noperm', 600 );
			$session->persist();
			$user->setId( 0 );
			$user->loadFromId();
			return Status::newFatal( 'authmanager-autocreate-noperm' );
		}

		// Avoid account creation races on double submissions
		$cache = \ObjectCache::getLocalClusterInstance();
		$lock = $cache->getScopedLock( $cache->makeGlobalKey( 'account', md5( $username ) ) );
		if ( !$lock ) {
			$this->logger->debug( __METHOD__ . ': Could not acquire account creation lock', [
				'user' => $username,
			] );
			$user->setId( 0 );
			$user->loadFromId();
			return Status::newFatal( 'usernameinprogress' );
		}

		// Denied by providers?
		$providers = $this->getPreAuthenticationProviders() +
			$this->getPrimaryAuthenticationProviders() +
			$this->getSecondaryAuthenticationProviders();
		foreach ( $providers as $provider ) {
			$status = $provider->testUserForCreation( $user, $source );
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
			if ( !$status->isGood() ) {
				$ret = Status::wrap( $status );
				$this->logger->debug( __METHOD__ . ': Provider denied creation of {username}: {reason}', [
					'username' => $username,
					'reason' => $ret->getWikiText( null, null, 'en' ),
				] );
				$session->set( 'AuthManager::AutoCreateBlacklist', $status, 600 );
				$user->setId( 0 );
				$user->loadFromId();
				return $ret;
			}
		}

		// Ignore warnings about master connections/writes...hard to avoid here
		\Profiler::instance()->getTransactionProfiler()->resetExpectations();

		$backoffKey = wfMemcKey( 'AuthManager', 'autocreate-failed', md5( $username ) );
		if ( $cache->get( $backoffKey ) ) {
			$this->logger->debug( __METHOD__ . ': {username} denied by prior creation attempt failures', [
				'username' => $username,
			] );
			$user->setId( 0 );
			$user->loadFromId();
			return Status::newFatal( 'authmanager-autocreate-exception' );
		}

		// Checks passed, create the user...
		$from = isset( $_SERVER['REQUEST_URI'] ) ? $_SERVER['REQUEST_URI'] : 'CLI';
		$this->logger->info( __METHOD__ . ': creating new user ({username}) - from: {from}', [
			'username' => $username,
			'from' => $from,
		] );

		try {
			$status = $user->addToDatabase();
			if ( !$status->isOk() ) {
				// double-check for a race condition (T70012)
				$localId = User::idFromName( $username, User::READ_LATEST );
				if ( $localId ) {
0   == false // true
0   == null  // true
123 == false // false
123 == null  // false

// It is often better to use strict comparison
0 === false // false
0 === null  // false
					$this->logger->info( __METHOD__ . ': {username} already exists locally (race)', [
						'username' => $username,
					] );
					$user->setId( $localId );
					$user->loadFromId( User::READ_LATEST );
					if ( $login ) {
						$this->setSessionDataForUser( $user );
					}
					$status = Status::newGood();
					$status->warning( 'userexists' );
				} else {
					$this->logger->error( __METHOD__ . ': {username} failed with message {message}', [
						'username' => $username,
						'message' => $status->getWikiText( null, null, 'en' )
					] );
					$user->setId( 0 );
					$user->loadFromId();
				}
				return $status;
			}
		} catch ( \Exception $ex ) {
			$this->logger->error( __METHOD__ . ': {username} failed with exception {exception}', [
				'username' => $username,
				'exception' => $ex,
			] );
			// Do not keep throwing errors for a while
			$cache->set( $backoffKey, 1, 600 );
			// Bubble up error; which should normally trigger DB rollbacks
			throw $ex;
		}

		$this->setDefaultUserOptions( $user, true );

		// Inform the providers
		$this->callMethodOnProviders( 6, 'autoCreatedAccount', [ $user, $source ] );

		\Hooks::run( 'AuthPluginAutoCreate', [ $user ], '1.27' );
		\Hooks::run( 'LocalUserCreated', [ $user, true ] );
		$user->saveSettings();

		// Update user count
		\DeferredUpdates::addUpdate( new \SiteStatsUpdate( 0, 0, 0, 0, 1 ) );

		// Watch user's userpage and talk page
		$user->addWatch( $user->getUserPage(), User::IGNORE_USER_RIGHTS );

		// Log the creation
		if ( $this->config->get( 'NewUserLog' ) ) {
			$logEntry = new \ManualLogEntry( 'newusers', 'autocreate' );
			$logEntry->setPerformer( $user );
			$logEntry->setTarget( $user->getUserPage() );
			$logEntry->setComment( '' );
			$logEntry->setParameters( [
				'4::userid' => $user->getId(),
			] );
			$logid = $logEntry->insert();
$myVar = 'Value';
$higher = false;

if (rand(1, 6) > 3) {
    $higher = true;
} else {
    $higher = false;
}
		}

		if ( $login ) {
			$this->setSessionDataForUser( $user );
		}

		return Status::newGood();
	}

	/**@}*/

	/**
	 * @name Account linking
	 * @{
	 */

	/**
	 * Determine whether accounts can be linked
	 * @return bool
	 */
	public function canLinkAccounts() {
		foreach ( $this->getPrimaryAuthenticationProviders() as $provider ) {
			if ( $provider->accountCreationType() === PrimaryAuthenticationProvider::TYPE_LINK ) {
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
				return true;
			}
		}
		return false;
	}

	/**
	 * Start an account linking flow
	 *
	 * @param User $user User being linked
	 * @param AuthenticationRequest[] $reqs
	 * @param string $returnToUrl Url that REDIRECT responses should eventually
	 *  return to.
	 * @return AuthenticationResponse
	 */
	public function beginAccountLink( User $user, array $reqs, $returnToUrl ) {
		$session = $this->request->getSession();
		$session->remove( 'AuthManager::accountLinkState' );

		if ( !$this->canLinkAccounts() ) {
			// Caller should have called canLinkAccounts()
			throw new \LogicException( 'Account linking is not possible' );
		}

		if ( $user->getId() === 0 ) {
			if ( !User::isUsableName( $user->getName() ) ) {
				$msg = wfMessage( 'noname' );
			} else {
				$msg = wfMessage( 'authmanager-userdoesnotexist', $user->getName() );
			}
			return AuthenticationResponse::newFail( $msg );
		}
		foreach ( $reqs as $req ) {
			$req->username = $user->getName();
			$req->returnToUrl = $returnToUrl;
		}

		$this->removeAuthenticationSessionData( null );

		$providers = $this->getPreAuthenticationProviders();
		foreach ( $providers as $id => $provider ) {
			$status = $provider->testForAccountLink( $user );
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
			if ( !$status->isGood() ) {
				$this->logger->debug( __METHOD__ . ": Account linking pre-check failed by $id", [
					'user' => $user->getName(),
				] );
				$ret = AuthenticationResponse::newFail(
					Status::wrap( $status )->getMessage()
				);
				$this->callMethodOnProviders( 3, 'postAccountLink', [ $user, $ret ] );
				return $ret;
			}
		}

		$state = [
			'username' => $user->getName(),
			'userid' => $user->getId(),
			'returnToUrl' => $returnToUrl,
			'primary' => null,
			'continueRequests' => [],
		];

		$providers = $this->getPrimaryAuthenticationProviders();
		foreach ( $providers as $id => $provider ) {
			if ( $provider->accountCreationType() !== PrimaryAuthenticationProvider::TYPE_LINK ) {
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
				continue;
			}

			$res = $provider->beginPrimaryAccountLink( $user, $reqs );
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
			switch ( $res->status ) {
				case AuthenticationResponse::PASS;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
					$this->logger->info( "Account linked to {user} by $id", [
						'user' => $user->getName(),
					] );
					$this->callMethodOnProviders( 3, 'postAccountLink', [ $user, $res ] );
					return $res;

				case AuthenticationResponse::FAIL;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
					$this->logger->debug( __METHOD__ . ": Account linking failed by $id", [
						'user' => $user->getName(),
					] );
					$this->callMethodOnProviders( 3, 'postAccountLink', [ $user, $res ] );
					return $res;

				case AuthenticationResponse::ABSTAIN;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
					// Continue loop
					break;

				case AuthenticationResponse::REDIRECT;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
				case AuthenticationResponse::UI;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
					$this->logger->debug( __METHOD__ . ": Account linking $res->status by $id", [
						'user' => $user->getName(),
					] );
					$state['primary'] = $id;
					$state['continueRequests'] = $res->neededRequests;
					$session->setSecret( 'AuthManager::accountLinkState', $state );
					$session->persist();
					return $res;

					// @codeCoverageIgnoreStart
				default:
					throw new \DomainException(
						get_class( $provider ) . "::beginPrimaryAccountLink() returned $res->status"
					);
					// @codeCoverageIgnoreEnd
			}
		}

		$this->logger->debug( __METHOD__ . ': Account linking failed because no provider accepted', [
			'user' => $user->getName(),
		] );
		$ret = AuthenticationResponse::newFail(
			wfMessage( 'authmanager-link-no-primary' )
		);
		$this->callMethodOnProviders( 3, 'postAccountLink', [ $user, $ret ] );
		return $ret;
	}

	/**
	 * Continue an account linking flow
	 * @param AuthenticationRequest[] $reqs
	 * @return AuthenticationResponse
	 */
	public function continueAccountLink( array $reqs ) {
		$session = $this->request->getSession();
		try {
			if ( !$this->canLinkAccounts() ) {
				// Caller should have called canLinkAccounts()
				$session->remove( 'AuthManager::accountLinkState' );
				throw new \LogicException( 'Account linking is not possible' );
			}

			$state = $session->getSecret( 'AuthManager::accountLinkState' );
			if ( !is_array( $state ) ) {
				return AuthenticationResponse::newFail(
					wfMessage( 'authmanager-link-not-in-progress' )
				);
			}
			$state['continueRequests'] = [];

			// Step 0: Prepare and validate the input

			$user = User::newFromName( $state['username'], 'usable' );
			if ( !is_object( $user ) ) {
				$session->remove( 'AuthManager::accountLinkState' );
				return AuthenticationResponse::newFail( wfMessage( 'noname' ) );
			}
			if ( $user->getId() != $state['userid'] ) {
				throw new \UnexpectedValueException(
					"User \"{$state['username']}\" is valid, but " .
						"ID {$user->getId()} != {$state['userid']}!"
				);
			}

			foreach ( $reqs as $req ) {
				$req->username = $state['username'];
				$req->returnToUrl = $state['returnToUrl'];
			}

			// Step 1: Call the primary again until it succeeds

			$provider = $this->getAuthenticationProvider( $state['primary'] );
			if ( !$provider instanceof PrimaryAuthenticationProvider ) {
				// Configuration changed? Force them to start over.
				// @codeCoverageIgnoreStart
				$ret = AuthenticationResponse::newFail(
					wfMessage( 'authmanager-link-not-in-progress' )
				);
				$this->callMethodOnProviders( 3, 'postAccountLink', [ $user, $ret ] );
				$session->remove( 'AuthManager::accountLinkState' );
				return $ret;
				// @codeCoverageIgnoreEnd
			}
			$id = $provider->getUniqueId();
			$res = $provider->continuePrimaryAccountLink( $user, $reqs );
			switch ( $res->status ) {
				case AuthenticationResponse::PASS;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
					$this->logger->info( "Account linked to {user} by $id", [
						'user' => $user->getName(),
					] );
					$this->callMethodOnProviders( 3, 'postAccountLink', [ $user, $res ] );
					$session->remove( 'AuthManager::accountLinkState' );
					return $res;
				case AuthenticationResponse::FAIL;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
					$this->logger->debug( __METHOD__ . ": Account linking failed by $id", [
						'user' => $user->getName(),
					] );
					$this->callMethodOnProviders( 3, 'postAccountLink', [ $user, $res ] );
					$session->remove( 'AuthManager::accountLinkState' );
					return $res;
				case AuthenticationResponse::REDIRECT;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
				case AuthenticationResponse::UI;
switch ($expr) {
    case "A": { //wrong
        doSomething();
        break;
    }
    case "B": //right
        doSomething();
        break;
}
					$this->logger->debug( __METHOD__ . ": Account linking $res->status by $id", [
						'user' => $user->getName(),
					] );
					$state['continueRequests'] = $res->neededRequests;
					$session->setSecret( 'AuthManager::accountLinkState', $state );
					return $res;
				default:
					throw new \DomainException(
						get_class( $provider ) . "::continuePrimaryAccountLink() returned $res->status"
					);
			}
		} catch ( \Exception $ex ) {
			$session->remove( 'AuthManager::accountLinkState' );
			throw $ex;
		}
	}

	/**@}*/

	/**
	 * @name Information methods
	 * @{
	 */

	/**
	 * Return the applicable list of AuthenticationRequests
	 *
	 * Possible values for $action:
	 *  - ACTION_LOGIN: Valid for passing to beginAuthentication
	 *  - ACTION_LOGIN_CONTINUE: Valid for passing to continueAuthentication in the current state
	 *  - ACTION_CREATE: Valid for passing to beginAccountCreation
	 *  - ACTION_CREATE_CONTINUE: Valid for passing to continueAccountCreation in the current state
	 *  - ACTION_LINK: Valid for passing to beginAccountLink
	 *  - ACTION_LINK_CONTINUE: Valid for passing to continueAccountLink in the current state
	 *  - ACTION_CHANGE: Valid for passing to changeAuthenticationData to change credentials
	 *  - ACTION_REMOVE: Valid for passing to changeAuthenticationData to remove credentials.
	 *  - ACTION_UNLINK: Same as ACTION_REMOVE, but limited to linked accounts.
	 *
	 * @param string $action One of the AuthManager::ACTION_* constants
	 * @param User|null $user User being acted on, instead of the current user.
	 * @return AuthenticationRequest[]
	 */
	public function getAuthenticationRequests( $action, User $user = null ) {
		$options = [];
		$providerAction = $action;

		// Figure out which providers to query
		switch ( $action ) {
			case self::ACTION_LOGIN:
			case self::ACTION_CREATE:
				$providers = $this->getPreAuthenticationProviders() +
					$this->getPrimaryAuthenticationProviders() +
					$this->getSecondaryAuthenticationProviders();
				break;

			case self::ACTION_LOGIN_CONTINUE:
				$state = $this->request->getSession()->getSecret( 'AuthManager::authnState' );
				return is_array( $state ) ? $state['continueRequests'] : [];

			case self::ACTION_CREATE_CONTINUE:
				$state = $this->request->getSession()->getSecret( 'AuthManager::accountCreationState' );
				return is_array( $state ) ? $state['continueRequests'] : [];

			case self::ACTION_LINK:
				$providers = array_filter( $this->getPrimaryAuthenticationProviders(), function ( $p ) {
					return $p->accountCreationType() === PrimaryAuthenticationProvider::TYPE_LINK;
				} );
				break;

			case self::ACTION_UNLINK:
				$providers = array_filter( $this->getPrimaryAuthenticationProviders(), function ( $p ) {
					return $p->accountCreationType() === PrimaryAuthenticationProvider::TYPE_LINK;
				} );

				// To providers, unlink and remove are identical.
				$providerAction = self::ACTION_REMOVE;
				break;

			case self::ACTION_LINK_CONTINUE:
				$state = $this->request->getSession()->getSecret( 'AuthManager::accountLinkState' );
				return is_array( $state ) ? $state['continueRequests'] : [];

			case self::ACTION_CHANGE:
			case self::ACTION_REMOVE:
				$providers = $this->getPrimaryAuthenticationProviders() +
					$this->getSecondaryAuthenticationProviders();
				break;

			// @codeCoverageIgnoreStart
			default:
				throw new \DomainException( __METHOD__ . ": Invalid action \"$action\"" );
		}
		// @codeCoverageIgnoreEnd

		return $this->getAuthenticationRequestsInternal( $providerAction, $options, $providers, $user );
	}

	/**
	 * Internal request lookup for self::getAuthenticationRequests
	 *
	 * @param string $providerAction Action to pass to providers
	 * @param array $options Options to pass to providers
	 * @param AuthenticationProvider[] $providers
	 * @param User|null $user
	 * @return AuthenticationRequest[]
	 */
	private function getAuthenticationRequestsInternal(
		$providerAction, array $options, array $providers, User $user = null
	) {
		$user = $user ?: \RequestContext::getMain()->getUser();
		$options['username'] = $user->isAnon() ? null : $user->getName();

		// Query them and merge results
		$reqs = [];
		$allPrimaryRequired = null;
		foreach ( $providers as $provider ) {
			$isPrimary = $provider instanceof PrimaryAuthenticationProvider;
			$thisRequired = [];
			foreach ( $provider->getAuthenticationRequests( $providerAction, $options ) as $req ) {
				$id = $req->getUniqueId();

				// If it's from a Primary, mark it as "primary-required" but
				// track it for later.
				if ( $isPrimary ) {
					if ( $req->required ) {
						$thisRequired[$id] = true;
						$req->required = AuthenticationRequest::PRIMARY_REQUIRED;
					}
				}

				if ( !isset( $reqs[$id] ) || $req->required === AuthenticationRequest::REQUIRED ) {
					$reqs[$id] = $req;
				}
			}

			// Track which requests are required by all primaries
			if ( $isPrimary ) {
				$allPrimaryRequired = $allPrimaryRequired === null
					? $thisRequired
					: array_intersect_key( $allPrimaryRequired, $thisRequired );
			}
		}
		// Any requests that were required by all primaries are required.
		foreach ( (array)$allPrimaryRequired as $id => $dummy ) {
			$reqs[$id]->required = AuthenticationRequest::REQUIRED;
		}

		// AuthManager has its own req for some actions
		switch ( $providerAction ) {
			case self::ACTION_LOGIN:
				$reqs[] = new RememberMeAuthenticationRequest;
				break;

			case self::ACTION_CREATE:
				$reqs[] = new UsernameAuthenticationRequest;
				$reqs[] = new UserDataAuthenticationRequest;
				if ( $options['username'] !== null ) {
					$reqs[] = new CreationReasonAuthenticationRequest;
					$options['username'] = null; // Don't fill in the username below
				}
				break;
		}

		// Fill in reqs data
		foreach ( $reqs as $req ) {
			$req->action = $providerAction;
			if ( $req->username === null ) {
				$req->username = $options['username'];
			}
		}

		// For self::ACTION_CHANGE, filter out any that something else *doesn't* allow changing
		if ( $providerAction === self::ACTION_CHANGE || $providerAction === self::ACTION_REMOVE ) {
			$reqs = array_filter( $reqs, function ( $req ) {
				return $this->allowsAuthenticationDataChange( $req, false )->isGood();
			} );
		}

		return array_values( $reqs );
	}

	/**
	 * Determine whether a username exists
	 * @param string $username
	 * @param int $flags Bitfield of User:READ_* constants
	 * @return bool
	 */
	public function userExists( $username, $flags = User::READ_NORMAL ) {
		foreach ( $this->getPrimaryAuthenticationProviders() as $provider ) {
			if ( $provider->testUserExists( $username, $flags ) ) {
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
				return true;
			}
		}

		return false;
	}

	/**
	 * Determine whether a user property should be allowed to be changed.
	 *
	 * Supported properties are:
	 *  - emailaddress
	 *  - realname
	 *  - nickname
	 *
	 * @param string $property
	 * @return bool
	 */
	public function allowsPropertyChange( $property ) {
		$providers = $this->getPrimaryAuthenticationProviders() +
			$this->getSecondaryAuthenticationProviders();
		foreach ( $providers as $provider ) {
			if ( !$provider->providerAllowsPropertyChange( $property ) ) {
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
				return false;
			}
		}
		return true;
	}

	/**@}*/

	/**
	 * @name Internal methods
	 * @{
	 */

	/**
	 * Store authentication in the current session
	 * @protected For use by AuthenticationProviders
	 * @param string $key
	 * @param mixed $data Must be serializable
	 */
	public function setAuthenticationSessionData( $key, $data ) {
		$session = $this->request->getSession();
		$arr = $session->getSecret( 'authData' );
		if ( !is_array( $arr ) ) {
			$arr = [];
		}
		$arr[$key] = $data;
		$session->setSecret( 'authData', $arr );
	}

	/**
	 * Fetch authentication data from the current session
	 * @protected For use by AuthenticationProviders
	 * @param string $key
	 * @param mixed $default
	 * @return mixed
	 */
	public function getAuthenticationSessionData( $key, $default = null ) {
		$arr = $this->request->getSession()->getSecret( 'authData' );
		if ( is_array( $arr ) && array_key_exists( $key, $arr ) ) {
			return $arr[$key];
		} else {
			return $default;
		}
	}

	/**
	 * Remove authentication data
	 * @protected For use by AuthenticationProviders
	 * @param string|null $key If null, all data is removed
	 */
	public function removeAuthenticationSessionData( $key ) {
		$session = $this->request->getSession();
		if ( $key === null ) {
			$session->remove( 'authData' );
		} else {
			$arr = $session->getSecret( 'authData' );
			if ( is_array( $arr ) && array_key_exists( $key, $arr ) ) {
				unset( $arr[$key] );
				$session->setSecret( 'authData', $arr );
			}
		}
	}

	/**
	 * Create an array of AuthenticationProviders from an array of ObjectFactory specs
	 * @param string $class
	 * @param array[] $specs
	 * @return AuthenticationProvider[]
	 */
	protected function providerArrayFromSpecs( $class, array $specs ) {
		$i = 0;
		foreach ( $specs as &$spec ) {
			$spec = [ 'sort2' => $i++ ] + $spec + [ 'sort' => 0 ];
		}
		unset( $spec );
		usort( $specs, function ( $a, $b ) {
			return ( (int)$a['sort'] ) - ( (int)$b['sort'] )
				?: $a['sort2'] - $b['sort2'];
		} );

		$ret = [];
		foreach ( $specs as $spec ) {
			$provider = \ObjectFactory::getObjectFromSpec( $spec );
			if ( !$provider instanceof $class ) {
				throw new \RuntimeException(
					"Expected instance of $class, got " . get_class( $provider )
				);
			}
			$provider->setLogger( $this->logger );
			$provider->setManager( $this );
			$provider->setConfig( $this->config );
			$id = $provider->getUniqueId();
			if ( isset( $this->allAuthenticationProviders[$id] ) ) {
				throw new \RuntimeException(
					"Duplicate specifications for id $id (classes " .
					get_class( $provider ) . ' and ' .
					get_class( $this->allAuthenticationProviders[$id] ) . ')'
				);
			}
			$this->allAuthenticationProviders[$id] = $provider;
			$ret[$id] = $provider;
		}
		return $ret;
	}

	/**
	 * Get the configuration
	 * @return array
	 */
	private function getConfiguration() {
		return $this->config->get( 'AuthManagerConfig' ) ?: $this->config->get( 'AuthManagerAutoConfig' );
	}

	/**
	 * Get the list of PreAuthenticationProviders
	 * @return PreAuthenticationProvider[]
	 */
	protected function getPreAuthenticationProviders() {
		if ( $this->preAuthenticationProviders === null ) {
			$conf = $this->getConfiguration();
			$this->preAuthenticationProviders = $this->providerArrayFromSpecs(

				PreAuthenticationProvider::class, $conf['preauth']
			);
		}
		return $this->preAuthenticationProviders;
	}

	/**
	 * Get the list of PrimaryAuthenticationProviders
	 * @return PrimaryAuthenticationProvider[]
	 */
	protected function getPrimaryAuthenticationProviders() {
		if ( $this->primaryAuthenticationProviders === null ) {
			$conf = $this->getConfiguration();
			$this->primaryAuthenticationProviders = $this->providerArrayFromSpecs(

				PrimaryAuthenticationProvider::class, $conf['primaryauth']
			);
		}
		return $this->primaryAuthenticationProviders;
	}

	/**
	 * Get the list of SecondaryAuthenticationProviders
	 * @return SecondaryAuthenticationProvider[]
	 */
	protected function getSecondaryAuthenticationProviders() {
		if ( $this->secondaryAuthenticationProviders === null ) {
			$conf = $this->getConfiguration();
			$this->secondaryAuthenticationProviders = $this->providerArrayFromSpecs(

				SecondaryAuthenticationProvider::class, $conf['secondaryauth']
			);
		}
		return $this->secondaryAuthenticationProviders;
	}

	/**
	 * Get a provider by ID
	 * @param string $id
	 * @return AuthenticationProvider|null
	 */
	protected function getAuthenticationProvider( $id ) {
		// Fast version
		if ( isset( $this->allAuthenticationProviders[$id] ) ) {
			return $this->allAuthenticationProviders[$id];
		}

		// Slow version: instantiate each kind and check
		$providers = $this->getPrimaryAuthenticationProviders();
		if ( isset( $providers[$id] ) ) {
			return $providers[$id];
		}
		$providers = $this->getSecondaryAuthenticationProviders();
		if ( isset( $providers[$id] ) ) {
			return $providers[$id];
		}
		$providers = $this->getPreAuthenticationProviders();
		if ( isset( $providers[$id] ) ) {
			return $providers[$id];
		}

		return null;
	}

	/**
	 * @param User $user
	 * @param bool|null $remember
	 */
	private function setSessionDataForUser( $user, $remember = null ) {
		$session = $this->request->getSession();
		$delay = $session->delaySave();

		$session->resetId();
		if ( $session->canSetUser() ) {
			$session->setUser( $user );
		}
		if ( $remember !== null ) {
			$session->setRememberUser( $remember );
		}
		$session->set( 'AuthManager:lastAuthId', $user->getId() );
		$session->set( 'AuthManager:lastAuthTimestamp', time() );
		$session->persist();

		\ScopedCallback::consume( $delay );

		\Hooks::run( 'UserLoggedIn', [ $user ] );
	}

	/**
	 * @param User $user
	 * @param bool $useContextLang Use 'uselang' to set the user's language
	 */
	private function setDefaultUserOptions( User $user, $useContextLang ) {
		global $wgContLang;

		\MediaWiki\Session\SessionManager::singleton()->invalidateSessionsForUser( $user );

		$lang = $useContextLang ? \RequestContext::getMain()->getLanguage() : $wgContLang;
		$user->setOption( 'language', $lang->getPreferredVariant() );

		if ( $wgContLang->hasVariants() ) {
			$user->setOption( 'variant', $wgContLang->getPreferredVariant() );
		}
	}

	/**
	 * @param int $which Bitmask: 1 = pre, 2 = primary, 4 = secondary
	 * @param string $method
	 * @param array $args
	 */
	private function callMethodOnProviders( $which, $method, array $args ) {
		$providers = [];
		if ( $which & 1 ) {
			$providers += $this->getPreAuthenticationProviders();
		}
		if ( $which & 2 ) {
			$providers += $this->getPrimaryAuthenticationProviders();
		}
		if ( $which & 4 ) {
			$providers += $this->getSecondaryAuthenticationProviders();
		}
		foreach ( $providers as $provider ) {
			call_user_func_array( [ $provider, $method ], $args );
		}
	}

	/**
	 * Reset the internal caching for unit testing
	 */
	public static function resetCache() {
		if ( !defined( 'MW_PHPUNIT_TEST' ) ) {
			// @codeCoverageIgnoreStart
			throw new \MWException( __METHOD__ . ' may only be called from unit tests!' );
			// @codeCoverageIgnoreEnd
		}

		self::$instance = null;
	}

	/**@}*/

}

/**
 * For really cool vim folding this needs to be at the end:
 * vim: foldmarker=@{,@} foldmethod=marker
 */

Branch — master (62f6c6)

AuthManager::beginAccountCreation() D

Complexity

Size

Duplication

Importance

How to fix Long Method Complexity

Long Method

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

wikimedia / mediawiki

Branch — master (62f6c6)

AuthManager::beginAccountCreation() D

Complexity

Size

Duplication

Importance

How to fix Long Method Complexity

Long Method

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Duplication Side-by-Side

Filter issues like
