UsersPager.php

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<?php
class UsersPager extends AlphabeticPager {

    protected $userGroupCache;

    public function __construct( IContextSource $context = null, $par = null, $including = null ) {
        if ( $context ) {
            $this->setContext( $context );
        }

        $request = $this->getRequest();
        $par = ( $par !== null ) ? $par : '';
        $parms = explode( '/', $par );
        $symsForAll = [ '*', 'user' ];

        if ( $parms[0] != '' &&
            ( in_array( $par, User::getAllGroups() ) || in_array( $par, $symsForAll ) )
        ) {
            $this->requestedGroup = $par;
            $un = $request->getText( 'username' );
        } elseif ( count( $parms ) == 2 ) {
            $this->requestedGroup = $parms[0];
            $un = $parms[1];
        } else {
            $this->requestedGroup = $request->getVal( 'group' );
            $un = ( $par != '' ) ? $par : $request->getText( 'username' );
        }

        if ( in_array( $this->requestedGroup, $symsForAll ) ) {
            $this->requestedGroup = '';
        }
        $this->editsOnly = $request->getBool( 'editsOnly' );
        $this->temporaryGroupsOnly = $request->getBool( 'temporaryGroupsOnly' );
        $this->creationSort = $request->getBool( 'creationSort' );
        $this->including = $including;
        $this->mDefaultDirection = $request->getBool( 'desc' )
            ? IndexPager::DIR_DESCENDING
            : IndexPager::DIR_ASCENDING;

        $this->requestedUser = '';

        if ( $un != '' ) {
            $username = Title::makeTitleSafe( NS_USER, $un );

            if ( !is_null( $username ) ) {
                $this->requestedUser = $username->getText();
            }
        }

        parent::__construct();
    }

    function getIndexField() {
        return $this->creationSort ? 'user_id' : 'user_name';
    }

    function getQueryInfo() {
        $dbr = wfGetDB( DB_REPLICA );
        $conds = [];

        // Don't show hidden names
        if ( !$this->getUser()->isAllowed( 'hideuser' ) ) {
            $conds[] = 'ipb_deleted IS NULL OR ipb_deleted = 0';
        }

        $options = [];

        if ( $this->requestedGroup != '' || $this->temporaryGroupsOnly ) {
            $conds[] = 'ug_expiry >= ' . $dbr->addQuotes( $dbr->timestamp() ) .
            ( !$this->temporaryGroupsOnly ? ' OR ug_expiry IS NULL' : '' );
        }

        if ( $this->requestedGroup != '' ) {
            $conds['ug_group'] = $this->requestedGroup;
        }

        if ( $this->requestedUser != '' ) {
            # Sorted either by account creation or name
            if ( $this->creationSort ) {
                $conds[] = 'user_id >= ' . intval( User::idFromName( $this->requestedUser ) );
            } else {
                $conds[] = 'user_name >= ' . $dbr->addQuotes( $this->requestedUser );
            }
        }

        if ( $this->editsOnly ) {
            $conds[] = 'user_editcount > 0';
        }

        $options['GROUP BY'] = $this->creationSort ? 'user_id' : 'user_name';

        $query = [
            'tables' => [ 'user', 'user_groups', 'ipblocks' ],
            'fields' => [
                'user_name' => $this->creationSort ? 'MAX(user_name)' : 'user_name',
                'user_id' => $this->creationSort ? 'user_id' : 'MAX(user_id)',
                'edits' => 'MAX(user_editcount)',
                'creation' => 'MIN(user_registration)',
                'ipb_deleted' => 'MAX(ipb_deleted)', // block/hide status
                'ipb_sitewide' => 'MAX(ipb_sitewide)'
            ],
            'options' => $options,
            'join_conds' => [
                'user_groups' => [ 'LEFT JOIN', 'user_id=ug_user' ],
                'ipblocks' => [
                    'LEFT JOIN', [
                        'user_id=ipb_user',
                        'ipb_auto' => 0
                    ]
                ],
            ],
            'conds' => $conds
        ];

        Hooks::run( 'SpecialListusersQueryInfo', [ $this, &$query ] );

        return $query;
    }

    function formatRow( $row ) {
        if ( $row->user_id == 0 ) { # T18487
            return '';
        }

        $userName = $row->user_name;

        $ulinks = Linker::userLink( $row->user_id, $userName );
        $ulinks .= Linker::userToolLinksRedContribs(
            $row->user_id,
            $userName,
            (int)$row->edits
        );

        $lang = $this->getLanguage();

        $groups = '';
        $ugms = self::getGroupMemberships( intval( $row->user_id ), $this->userGroupCache );

        if ( !$this->including && count( $ugms ) > 0 ) {
            $list = [];
            foreach ( $ugms as $ugm ) {
                $list[] = $this->buildGroupLink( $ugm, $userName );
            }
            $groups = $lang->commaList( $list );
        }

        $item = $lang->specialList( $ulinks, $groups );

        if ( $row->ipb_deleted ) {
            $item = "<span class=\"deleted\">$item</span>";
        }

        $edits = '';
        if ( !$this->including && $this->getConfig()->get( 'Edititis' ) ) {
            $count = $this->msg( 'usereditcount' )->numParams( $row->edits )->escaped();
            $edits = $this->msg( 'word-separator' )->escaped() . $this->msg( 'brackets', $count )->escaped();
        }

        $created = '';
        # Some rows may be null
        if ( !$this->including && $row->creation ) {
            $user = $this->getUser();
            $d = $lang->userDate( $row->creation, $user );
            $t = $lang->userTime( $row->creation, $user );
            $created = $this->msg( 'usercreated', $d, $t, $row->user_name )->escaped();
            $created = ' ' . $this->msg( 'parentheses' )->rawParams( $created )->escaped();
        }

        $blocked = !is_null( $row->ipb_deleted ) && $row->ipb_sitewide === '1' ?
            ' ' . $this->msg( 'listusers-blocked', $userName )->escaped() :
            '';

        Hooks::run( 'SpecialListusersFormatRow', [ &$item, $row ] );

        return Html::rawElement( 'li', [], "{$item}{$edits}{$created}{$blocked}" );
    }

    protected function doBatchLookups() {
        $batch = new LinkBatch();
        $userIds = [];
        # Give some pointers to make user links
        foreach ( $this->mResult as $row ) {
            $batch->add( NS_USER, $row->user_name );
            $batch->add( NS_USER_TALK, $row->user_name );
            $userIds[] = $row->user_id;
        }

        // Lookup groups for all the users
        $dbr = wfGetDB( DB_REPLICA );
        $groupRes = $dbr->select(
            'user_groups',
            UserGroupMembership::selectFields(),
            [ 'ug_user' => $userIds ],
            __METHOD__
        );
        $cache = [];
        $groups = [];
        foreach ( $groupRes as $row ) {
            $ugm = UserGroupMembership::newFromRow( $row );
            if ( !$ugm->isExpired() ) {
                $cache[$row->ug_user][$row->ug_group] = $ugm;
                $groups[$row->ug_group] = true;
            }
        }

        // Give extensions a chance to add things like global user group data
        // into the cache array to ensure proper output later on
        Hooks::run( 'UsersPagerDoBatchLookups', [ $dbr, $userIds, &$cache, &$groups ] );

        $this->userGroupCache = $cache;

        // Add page of groups to link batch
        foreach ( $groups as $group => $unused ) {
            $groupPage = UserGroupMembership::getGroupPage( $group );
            if ( $groupPage ) {
                $batch->addObj( $groupPage );
            }
        }

        $batch->execute();
        $this->mResult->rewind();
    }

    function getPageHeader() {
        list( $self ) = explode( '/', $this->getTitle()->getPrefixedDBkey() );

        $groupOptions = [ $this->msg( 'group-all' )->text() => '' ];
        foreach ( $this->getAllGroups() as $group => $groupText ) {
            $groupOptions[ $groupText ] = $group;
        }

        $formDescriptor = [
            'user' => [
                'class' => HTMLUserTextField::class,
                'label' => $this->msg( 'listusersfrom' )->text(),
                'name' => 'username',
                'default' => $this->requestedUser,
            ],
            'dropdown' => [
                'label' => $this->msg( 'group' )->text(),
                'name' => 'group',
                'default' => $this->requestedGroup,
                'class' => HTMLSelectField::class,
                'options' => $groupOptions,
            ],
            'editsOnly' => [
                'type' => 'check',
                'label' => $this->msg( 'listusers-editsonly' )->text(),
                'name' => 'editsOnly',
                'id' => 'editsOnly',
                'default' => $this->editsOnly
            ],
            'temporaryGroupsOnly' => [
                'type' => 'check',
                'label' => $this->msg( 'listusers-temporarygroupsonly' )->text(),
                'name' => 'temporaryGroupsOnly',
                'id' => 'temporaryGroupsOnly',
                'default' => $this->temporaryGroupsOnly
            ],
            'creationSort' => [
                'type' => 'check',
                'label' => $this->msg( 'listusers-creationsort' )->text(),
                'name' => 'creationSort',
                'id' => 'creationSort',
                'default' => $this->creationSort
            ],
            'desc' => [
                'type' => 'check',
                'label' => $this->msg( 'listusers-desc' )->text(),
                'name' => 'desc',
                'id' => 'desc',
                'default' => $this->mDefaultDirection
            ],
            'limithiddenfield' => [
                'class' => HTMLHiddenField::class,
                'name' => 'limit',
                'default' => $this->mLimit
            ]
        ];

        $beforeSubmitButtonHookOut = '';
        Hooks::run( 'SpecialListusersHeaderForm', [ $this, &$beforeSubmitButtonHookOut ] );

        if ( $beforeSubmitButtonHookOut !== '' ) {
            $formDescriptor[ 'beforeSubmitButtonHookOut' ] = [
                'class' => HTMLInfoField::class,
                'raw' => true,
                'default' => $beforeSubmitButtonHookOut
            ];
        }

        $formDescriptor[ 'submit' ] = [
            'class' => HTMLSubmitField::class,
            'buttonlabel-message' => 'listusers-submit',
        ];

        $beforeClosingFieldsetHookOut = '';
        Hooks::run( 'SpecialListusersHeader', [ $this, &$beforeClosingFieldsetHookOut ] );

        if ( $beforeClosingFieldsetHookOut !== '' ) {
            $formDescriptor[ 'beforeClosingFieldsetHookOut' ] = [
                'class' => HTMLInfoField::class,
                'raw' => true,
                'default' => $beforeClosingFieldsetHookOut
            ];
        }

        $htmlForm = HTMLForm::factory( 'ooui', $formDescriptor, $this->getContext() );
        $htmlForm
            ->setMethod( 'get' )
            ->setAction( Title::newFromText( $self )->getLocalURL() )
            ->setId( 'mw-listusers-form' )
            ->setFormIdentifier( 'mw-listusers-form' )
            ->suppressDefaultSubmit()
            ->setWrapperLegendMsg( 'listusers' );
        return $htmlForm->prepareForm()->getHTML( true );
    }

    function getAllGroups() {
        $result = [];
        foreach ( User::getAllGroups() as $group ) {
            $result[$group] = UserGroupMembership::getGroupName( $group );
        }
        asort( $result );

        return $result;
    }

    function getDefaultQuery() {
        $query = parent::getDefaultQuery();
        if ( $this->requestedGroup != '' ) {
            $query['group'] = $this->requestedGroup;
        }
        if ( $this->requestedUser != '' ) {
            $query['username'] = $this->requestedUser;
        }
        Hooks::run( 'SpecialListusersDefaultQuery', [ $this, &$query ] );

        return $query;
    }

    protected static function getGroupMemberships( $uid, $cache = null ) {
        if ( $cache === null ) {
            $user = User::newFromId( $uid );
            return $user->getGroupMemberships();
        } else {
            return $cache[$uid] ?? [];
        }
    }

    protected function buildGroupLink( $group, $username ) {
        return UserGroupMembership::getLink( $group, $this->getContext(), 'html', $username );
    }
}