SpecialPasswordReset.php

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<?php
class SpecialPasswordReset extends FormSpecialPage {
    private $email;

    private $firstUser;

    private $result;

    public function __construct() {
        parent::__construct( 'PasswordReset', 'editmyprivateinfo' );
    }

    public function userCanExecute( User $user ) {
        return $this->canChangePassword( $user ) === true && parent::userCanExecute( $user );
    }

    public function checkExecutePermissions( User $user ) {
        $error = $this->canChangePassword( $user );
        if ( is_string( $error ) ) {
            throw new ErrorPageError( 'internalerror', $error );
        } elseif ( !$error ) {
            throw new ErrorPageError( 'internalerror', 'resetpass_forbidden' );
        }

        return parent::checkExecutePermissions( $user );
    }

    protected function getFormFields() {
        global $wgPasswordResetRoutes, $wgAuth;
        $a = array();
        if ( isset( $wgPasswordResetRoutes['username'] ) && $wgPasswordResetRoutes['username'] ) {
            $a['Username'] = array(
                'type' => 'text',
                'label-message' => 'passwordreset-username',
            );

            if ( $this->getUser()->isLoggedIn() ) {
                $a['Username']['default'] = $this->getUser()->getName();
            }
        }

        if ( isset( $wgPasswordResetRoutes['email'] ) && $wgPasswordResetRoutes['email'] ) {
            $a['Email'] = array(
                'type' => 'email',
                'label-message' => 'passwordreset-email',
            );
        }

        if ( isset( $wgPasswordResetRoutes['domain'] ) && $wgPasswordResetRoutes['domain'] ) {
            $domains = $wgAuth->domainList();
            $a['Domain'] = array(
                'type' => 'select',
                'options' => $domains,
                'label-message' => 'passwordreset-domain',
            );
        }

        if ( $this->getUser()->isAllowed( 'passwordreset' ) ) {
            $a['Capture'] = array(
                'type' => 'check',
                'label-message' => 'passwordreset-capture',
                'help-message' => 'passwordreset-capture-help',
            );
        }

        return $a;
    }

    public function alterForm( HTMLForm $form ) {
        global $wgPasswordResetRoutes;

        $form->setDisplayFormat( 'vform' );
        // Turn the old-school line around the form off.
        // XXX This wouldn't be necessary here if we could set the format of
        // the HTMLForm to 'vform' at its creation, but there's no way to do so
        // from a FormSpecialPage class.
        $form->setWrapperLegend( false );

        $i = 0;
        if ( isset( $wgPasswordResetRoutes['username'] ) && $wgPasswordResetRoutes['username'] ) {
            $i++;
        }
        if ( isset( $wgPasswordResetRoutes['email'] ) && $wgPasswordResetRoutes['email'] ) {
            $i++;
        }
        if ( isset( $wgPasswordResetRoutes['domain'] ) && $wgPasswordResetRoutes['domain'] ) {
            $i++;
        }

        $message = ( $i > 1 ) ? 'passwordreset-text-many' : 'passwordreset-text-one';

        $form->setHeaderText( $this->msg( $message, $i )->parseAsBlock() );
        $form->setSubmitTextMsg( 'mailmypassword' );
    }

    public function onSubmit( array $data ) {
        global $wgAuth;

        if ( isset( $data['Domain'] ) ) {
            if ( $wgAuth->validDomain( $data['Domain'] ) ) {
                $wgAuth->setDomain( $data['Domain'] );
            } else {
                $wgAuth->setDomain( 'invaliddomain' );
            }
        }

        if ( isset( $data['Capture'] ) && !$this->getUser()->isAllowed( 'passwordreset' ) ) {
            // The user knows they don't have the passwordreset permission,
            // but they tried to spoof the form. That's naughty
            throw new PermissionsError( 'passwordreset' );
        }

        if ( isset( $data['Username'] ) && $data['Username'] !== '' ) {
            $method = 'username';
            $users = array( User::newFromName( $data['Username'] ) );
        } elseif ( isset( $data['Email'] )
            && $data['Email'] !== ''
            && Sanitizer::validateEmail( $data['Email'] )
        ) {
            $method = 'email';
            $res = wfGetDB( DB_SLAVE )->select(
                'user',
                User::selectFields(),
                array( 'user_email' => $data['Email'] ),
                __METHOD__
            );

            if ( $res ) {
                $users = array();

                foreach ( $res as $row ) {
                    $users[] = User::newFromRow( $row );
                }
            } else {
                // Some sort of database error, probably unreachable
                throw new MWException( 'Unknown database error in ' . __METHOD__ );
            }
        } else {
            // The user didn't supply any data
            return false;
        }

        // Check for hooks (captcha etc), and allow them to modify the users list
        $error = array();
        if ( !wfRunHooks( 'SpecialPasswordResetOnSubmit', array( &$users, $data, &$error ) ) ) {
            return array( $error );
        }

        if ( count( $users ) == 0 ) {
            if ( $method == 'email' ) {
                // Don't reveal whether or not an email address is in use
                return true;
            } else {
                return array( 'noname' );
            }
        }

        $firstUser = $users[0];

        if ( !$firstUser instanceof User || !$firstUser->getID() ) {
            // Don't parse username as wikitext (bug 65501)
            return array( array( 'nosuchuser', wfEscapeWikiText( $data['Username'] ) ) );
        }

        // Check against the rate limiter
        if ( $this->getUser()->pingLimiter( 'mailpassword' ) ) {
            throw new ThrottledError;
        }

        // Check against password throttle
        foreach ( $users as $user ) {
            if ( $user->isPasswordReminderThrottled() ) {
                global $wgPasswordReminderResendTime;

                # Round the time in hours to 3 d.p., in case someone is specifying
                # minutes or seconds.
                return array( array(
                    'throttled-mailpassword',
                    round( $wgPasswordReminderResendTime, 3 )
                ) );
            }
        }

        global $wgNewPasswordExpiry;

        // All the users will have the same email address
        if ( $firstUser->getEmail() == '' ) {
            // This won't be reachable from the email route, so safe to expose the username
            return array( array( 'noemail', wfEscapeWikiText( $firstUser->getName() ) ) );
        }

        // We need to have a valid IP address for the hook, but per bug 18347, we should
        // send the user's name if they're logged in.
        $ip = $this->getRequest()->getIP();
        if ( !$ip ) {
            return array( 'badipaddress' );
        }
        $caller = $this->getUser();
        wfRunHooks( 'User::mailPasswordInternal', array( &$caller, &$ip, &$firstUser ) );
        $username = $caller->getName();
        $msg = IP::isValid( $username )
            ? 'passwordreset-emailtext-ip'
            : 'passwordreset-emailtext-user';

        // Send in the user's language; which should hopefully be the same
        $userLanguage = $firstUser->getOption( 'language' );

        $passwords = array();
        foreach ( $users as $user ) {
            $password = $user->randomPassword();
            $user->setNewpassword( $password );
            $user->saveSettings();
            $passwords[] = $this->msg( 'passwordreset-emailelement', $user->getName(), $password )
                ->inLanguage( $userLanguage )->text(); // We'll escape the whole thing later
        }
        $passwordBlock = implode( "\n\n", $passwords );

        $this->email = $this->msg( $msg )->inLanguage( $userLanguage );
        $this->email->params(
            $username,
            $passwordBlock,
            count( $passwords ),
            '<' . Title::newMainPage()->getCanonicalURL() . '>',
            round( $wgNewPasswordExpiry / 86400 )
        );

        $title = $this->msg( 'passwordreset-emailtitle' );

        $this->result = $firstUser->sendMail( $title->escaped(), $this->email->text() );

        if ( isset( $data['Capture'] ) && $data['Capture'] ) {
            // Save the user, will be used if an error occurs when sending the email
            $this->firstUser = $firstUser;
        } else {
            // Blank the email if the user is not supposed to see it
            $this->email = null;
        }

        if ( $this->result->isGood() ) {
            return true;
        } elseif ( isset( $data['Capture'] ) && $data['Capture'] ) {
            // The email didn't send, but maybe they knew that and that's why they captured it
            return true;
        } else {
            // @todo FIXME: The email wasn't sent, but we have already set
            // the password throttle timestamp, so they won't be able to try
            // again until it expires...  :(
            return array( array( 'mailerror', $this->result->getMessage() ) );
        }
    }

    public function onSuccess() {
        if ( $this->getUser()->isAllowed( 'passwordreset' ) && $this->email != null ) {
            // @todo Logging

            if ( $this->result->isGood() ) {
                $this->getOutput()->addWikiMsg( 'passwordreset-emailsent-capture' );
            } else {
                $this->getOutput()->addWikiMsg( 'passwordreset-emailerror-capture',
                    $this->result->getMessage(), $this->firstUser->getName() );
            }

            $this->getOutput()->addHTML( Html::rawElement( 'pre', array(), $this->email->escaped() ) );
        }

        $this->getOutput()->addWikiMsg( 'passwordreset-emailsent' );
        $this->getOutput()->returnToMain();
    }

    protected function canChangePassword( User $user ) {
        global $wgPasswordResetRoutes, $wgEnableEmail, $wgAuth;

        // Maybe password resets are disabled, or there are no allowable routes
        if ( !is_array( $wgPasswordResetRoutes ) ||
            !in_array( true, array_values( $wgPasswordResetRoutes ) )
        ) {
            return 'passwordreset-disabled';
        }

        // Maybe the external auth plugin won't allow local password changes
        if ( !$wgAuth->allowPasswordChange() ) {
            return 'resetpass_forbidden';
        }

        // Maybe email features have been disabled
        if ( !$wgEnableEmail ) {
            return 'passwordreset-emaildisabled';
        }

        // Maybe the user is blocked (check this here rather than relying on the parent
        // method as we have a more specific error message to use here
        if ( $user->isBlocked() ) {
            return 'blocked-mailpassword';
        }

        return true;
    }

    function isListed() {
        if ( $this->canChangePassword( $this->getUser() ) === true ) {
            return parent::isListed();
        }

        return false;
    }

    protected function getGroupName() {
        return 'users';
    }
}