ApiQueryAllUsers.php

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<?php
use MediaWiki\MainConfigNames;
use MediaWiki\Permissions\GroupPermissionsLookup;
use MediaWiki\User\UserFactory;
use MediaWiki\User\UserGroupManager;
use Wikimedia\ParamValidator\ParamValidator;
use Wikimedia\ParamValidator\TypeDef\IntegerDef;
use Wikimedia\Rdbms\IExpression;
use Wikimedia\Rdbms\LikeValue;
 
class ApiQueryAllUsers extends ApiQueryBase {
    use ApiQueryBlockInfoTrait;
 
    private UserFactory $userFactory;
    private UserGroupManager $userGroupManager;
    private GroupPermissionsLookup $groupPermissionsLookup;
    private Language $contentLanguage;
 
    public function __construct(
        ApiQuery $query,
        $moduleName,
        UserFactory $userFactory,
        UserGroupManager $userGroupManager,
        GroupPermissionsLookup $groupPermissionsLookup,
        Language $contentLanguage
    ) {
        parent::__construct( $query, $moduleName, 'au' );
        $this->userFactory = $userFactory;
        $this->userGroupManager = $userGroupManager;
        $this->groupPermissionsLookup = $groupPermissionsLookup;
        $this->contentLanguage = $contentLanguage;
    }
 
    private function getCanonicalUserName( $name ) {
        $name = $this->contentLanguage->ucfirst( $name );
        return strtr( $name, '_', ' ' );
    }
 
    public function execute() {
        $params = $this->extractRequestParams();
        $activeUserDays = $this->getConfig()->get( MainConfigNames::ActiveUserDays );
 
        $db = $this->getDB();
 
        $prop = $params['prop'];
        if ( $prop !== null ) {
            $prop = array_fill_keys( $prop, true );
            $fld_blockinfo = isset( $prop['blockinfo'] );
            $fld_editcount = isset( $prop['editcount'] );
            $fld_groups = isset( $prop['groups'] );
            $fld_rights = isset( $prop['rights'] );
            $fld_registration = isset( $prop['registration'] );
            $fld_implicitgroups = isset( $prop['implicitgroups'] );
            $fld_centralids = isset( $prop['centralids'] );
        } else {
            $fld_blockinfo = $fld_editcount = $fld_groups = $fld_registration =
                $fld_rights = $fld_implicitgroups = $fld_centralids = false;
        }
 
        $limit = $params['limit'];
 
        $this->addTables( 'user' );
 
        $dir = ( $params['dir'] == 'descending' ? 'older' : 'newer' );
        $from = $params['from'] === null ? null : $this->getCanonicalUserName( $params['from'] );
        $to = $params['to'] === null ? null : $this->getCanonicalUserName( $params['to'] );
 
        # MySQL can't figure out that 'user_name' and 'qcc_title' are the same
        # despite the JOIN condition, so manually sort on the correct one.
        $userFieldToSort = $params['activeusers'] ? 'qcc_title' : 'user_name';
 
        # Some of these subtable joins are going to give us duplicate rows, so
        # calculate the maximum number of duplicates we might see.
        $maxDuplicateRows = 1;
 
        $this->addWhereRange( $userFieldToSort, $dir, $from, $to );
 
        if ( $params['prefix'] !== null ) {
            $this->addWhere(
                $db->expr(
                    $userFieldToSort,
                    IExpression::LIKE,
                    new LikeValue( $this->getCanonicalUserName( $params['prefix'] ), $db->anyString() )
                )
            );
        }
 
        if ( $params['rights'] !== null && count( $params['rights'] ) ) {
            $groups = [];
            // TODO: this does not properly account for $wgRevokePermissions
            foreach ( $params['rights'] as $r ) {
                if ( in_array( $r, $this->getPermissionManager()->getImplicitRights(), true ) ) {
                    $groups[] = '*';
                } else {
                    $groups = array_merge(
                        $groups,
                        $this->groupPermissionsLookup->getGroupsWithPermission( $r )
                    );
                }
            }
 
            if ( $groups === [] ) {
                // No group with the given right(s) exists, no need for a query
                $this->getResult()->addIndexedTagName( [ 'query', $this->getModuleName() ], '' );
 
                return;
            }
 
            $groups = array_unique( $groups );
            if ( in_array( '*', $groups, true ) || in_array( 'user', $groups, true ) ) {
                // All user rows logically match but there are no "*"/"user" user_groups rows
                $groups = [];
            }
 
            if ( $params['group'] === null ) {
                $params['group'] = $groups;
            } else {
                $params['group'] = array_unique( array_merge( $params['group'], $groups ) );
            }
        }
 
        $this->requireMaxOneParameter( $params, 'group', 'excludegroup' );
 
        if ( $params['group'] !== null && count( $params['group'] ) ) {
            // Filter only users that belong to a given group. This might
            // produce as many rows-per-user as there are groups being checked.
            $this->addTables( 'user_groups', 'ug1' );
            $this->addJoinConds( [
                'ug1' => [
                    'JOIN',
                    [
                        'ug1.ug_user=user_id',
                        'ug1.ug_group' => $params['group'],
                        'ug1.ug_expiry IS NULL OR ug1.ug_expiry >= ' . $db->addQuotes( $db->timestamp() )
                    ]
                ]
            ] );
            $maxDuplicateRows *= count( $params['group'] );
        }
 
        if ( $params['excludegroup'] !== null && count( $params['excludegroup'] ) ) {
            // Filter only users don't belong to a given group. This can only
            // produce one row-per-user, because we only keep on "no match".
            $this->addTables( 'user_groups', 'ug1' );
 
            $this->addJoinConds( [ 'ug1' => [ 'LEFT JOIN',
                [
                    'ug1.ug_user=user_id',
                    'ug1.ug_expiry IS NULL OR ug1.ug_expiry >= ' . $db->addQuotes( $db->timestamp() ),
                    'ug1.ug_group' => $params['excludegroup'],
                ]
            ] ] );
            $this->addWhere( [ 'ug1.ug_user' => null ] );
        }
 
        if ( $params['witheditsonly'] ) {
            $this->addWhere( 'user_editcount > 0' );
        }
 
        $this->addDeletedUserFilter();
 
        if ( $fld_groups || $fld_rights ) {
            $this->addFields( [ 'groups' =>
                $db->buildGroupConcatField( '|', 'user_groups', 'ug_group', [
                    'ug_user=user_id',
                    $db->expr( 'ug_expiry', '=', null )->or( 'ug_expiry', '>=', $db->timestamp() )
                ] )
            ] );
        }
 
        if ( $params['activeusers'] ) {
            $activeUserSeconds = $activeUserDays * 86400;
 
            // Filter query to only include users in the active users cache.
            // There shouldn't be any duplicate rows in querycachetwo here.
            $this->addTables( 'querycachetwo' );
            $this->addJoinConds( [ 'querycachetwo' => [
                'JOIN', [
                    'qcc_type' => 'activeusers',
                    'qcc_namespace' => NS_USER,
                    'qcc_title=user_name',
                ],
            ] ] );
 
            // Actually count the actions using a subquery (T66505 and T66507)
            $timestamp = $db->timestamp( (int)wfTimestamp( TS_UNIX ) - $activeUserSeconds );
            $subqueryBuilder = $db->newSelectQueryBuilder()
                ->select( 'COUNT(*)' )
                ->from( 'recentchanges' )
                ->join( 'actor', null, 'rc_actor = actor_id' )
                ->where( [
                    'actor_user = user_id',
                    $db->expr( 'rc_type', '!=', RC_EXTERNAL ), // no wikidata
                    $db->expr( 'rc_log_type', '=', null )
                        ->or( 'rc_log_type', '!=', 'newusers' ),
                    $db->expr( 'rc_timestamp', '>=', $timestamp ),
                ] );
            $this->addFields( [
                'recentactions' => '(' . $subqueryBuilder->caller( __METHOD__ )->getSQL() . ')'
            ] );
        }
 
        $sqlLimit = $limit + $maxDuplicateRows;
        $this->addOption( 'LIMIT', $sqlLimit );
 
        $this->addFields( [
            'user_name',
            'user_id'
        ] );
        $this->addFieldsIf( 'user_editcount', $fld_editcount );
        $this->addFieldsIf( 'user_registration', $fld_registration );
 
        $res = $this->select( __METHOD__ );
        $count = 0;
        $countDuplicates = 0;
        $lastUser = false;
        $result = $this->getResult();
        $blockInfos = $fld_blockinfo ? $this->getBlockDetailsForRows( $res ) : null;
        foreach ( $res as $row ) {
            $count++;
 
            if ( $lastUser === $row->user_name ) {
                // Duplicate row due to one of the needed subtable joins.
                // Ignore it, but count the number of them to sensibly handle
                // miscalculation of $maxDuplicateRows.
                $countDuplicates++;
                if ( $countDuplicates == $maxDuplicateRows ) {
                    ApiBase::dieDebug( __METHOD__, 'Saw more duplicate rows than expected' );
                }
                continue;
            }
 
            $countDuplicates = 0;
            $lastUser = $row->user_name;
 
            if ( $count > $limit ) {
                // We've reached the one extra which shows that there are
                // additional pages to be had. Stop here...
                $this->setContinueEnumParameter( 'from', $row->user_name );
                break;
            }
 
            if ( $count == $sqlLimit ) {
                // Should never hit this (either the $countDuplicates check or
                // the $count > $limit check should hit first), but check it
                // anyway just in case.
                ApiBase::dieDebug( __METHOD__, 'Saw more duplicate rows than expected' );
            }
 
            if ( $params['activeusers'] && (int)$row->recentactions === 0 ) {
                // activeusers cache was out of date
                continue;
            }
 
            $data = [
                'userid' => (int)$row->user_id,
                'name' => $row->user_name,
            ];
 
            if ( $fld_centralids ) {
                $data += ApiQueryUserInfo::getCentralUserInfo(
                    $this->getConfig(), $this->userFactory->newFromId( (int)$row->user_id ), $params['attachedwiki']
                );
            }
 
            if ( $fld_blockinfo && isset( $blockInfos[$row->user_id] ) ) {
                $data += $blockInfos[$row->user_id];
            }
            if ( $row->hu_deleted ) {
                $data['hidden'] = true;
            }
            if ( $fld_editcount ) {
                $data['editcount'] = (int)$row->user_editcount;
            }
            if ( $params['activeusers'] ) {
                $data['recentactions'] = (int)$row->recentactions;
            }
            if ( $fld_registration ) {
                $data['registration'] = $row->user_registration ?
                    wfTimestamp( TS_ISO_8601, $row->user_registration ) : '';
            }
 
            if ( $fld_implicitgroups || $fld_groups || $fld_rights ) {
                $implicitGroups = $this->userGroupManager
                    ->getUserImplicitGroups( $this->userFactory->newFromId( (int)$row->user_id ) );
                if ( isset( $row->groups ) && $row->groups !== '' ) {
                    $groups = array_merge( $implicitGroups, explode( '|', $row->groups ) );
                } else {
                    $groups = $implicitGroups;
                }
 
                if ( $fld_groups ) {
                    $data['groups'] = $groups;
                    ApiResult::setIndexedTagName( $data['groups'], 'g' );
                    ApiResult::setArrayType( $data['groups'], 'array' );
                }
 
                if ( $fld_implicitgroups ) {
                    $data['implicitgroups'] = $implicitGroups;
                    ApiResult::setIndexedTagName( $data['implicitgroups'], 'g' );
                    ApiResult::setArrayType( $data['implicitgroups'], 'array' );
                }
 
                if ( $fld_rights ) {
                    $user = $this->userFactory->newFromId( (int)$row->user_id );
                    $data['rights'] = $this->getPermissionManager()->getUserPermissions( $user );
                    ApiResult::setIndexedTagName( $data['rights'], 'r' );
                    ApiResult::setArrayType( $data['rights'], 'array' );
                }
            }
 
            $fit = $result->addValue( [ 'query', $this->getModuleName() ], null, $data );
            if ( !$fit ) {
                $this->setContinueEnumParameter( 'from', $data['name'] );
                break;
            }
        }
 
        $result->addIndexedTagName( [ 'query', $this->getModuleName() ], 'u' );
    }
 
    public function getCacheMode( $params ) {
        return 'anon-public-user-private';
    }
 
    public function getAllowedParams( $flags = 0 ) {
        $userGroups = $this->userGroupManager->listAllGroups();
 
        if ( $flags & ApiBase::GET_VALUES_FOR_HELP ) {
            sort( $userGroups );
        }
 
        return [
            'from' => null,
            'to' => null,
            'prefix' => null,
            'dir' => [
                ParamValidator::PARAM_DEFAULT => 'ascending',
                ParamValidator::PARAM_TYPE => [
                    'ascending',
                    'descending'
                ],
            ],
            'group' => [
                ParamValidator::PARAM_TYPE => $userGroups,
                ParamValidator::PARAM_ISMULTI => true,
            ],
            'excludegroup' => [
                ParamValidator::PARAM_TYPE => $userGroups,
                ParamValidator::PARAM_ISMULTI => true,
            ],
            'rights' => [
                ParamValidator::PARAM_TYPE => array_unique( array_merge(
                    $this->getPermissionManager()->getAllPermissions(),
                    $this->getPermissionManager()->getImplicitRights()
                ) ),
                ParamValidator::PARAM_ISMULTI => true,
            ],
            'prop' => [
                ParamValidator::PARAM_ISMULTI => true,
                ParamValidator::PARAM_TYPE => [
                    'blockinfo',
                    'groups',
                    'implicitgroups',
                    'rights',
                    'editcount',
                    'registration',
                    'centralids',
                ],
                ApiBase::PARAM_HELP_MSG_PER_VALUE => [],
            ],
            'limit' => [
                ParamValidator::PARAM_DEFAULT => 10,
                ParamValidator::PARAM_TYPE => 'limit',
                IntegerDef::PARAM_MIN => 1,
                IntegerDef::PARAM_MAX => ApiBase::LIMIT_BIG1,
                IntegerDef::PARAM_MAX2 => ApiBase::LIMIT_BIG2
            ],
            'witheditsonly' => false,
            'activeusers' => [
                ParamValidator::PARAM_DEFAULT => false,
                ApiBase::PARAM_HELP_MSG => [
                    'apihelp-query+allusers-param-activeusers',
                    $this->getConfig()->get( MainConfigNames::ActiveUserDays )
                ],
            ],
            'attachedwiki' => null,
        ];
    }
 
    protected function getExamplesMessages() {
        return [
            'action=query&list=allusers&aufrom=Y'
                => 'apihelp-query+allusers-example-y',
        ];
    }
 
    public function getHelpUrls() {
        return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Allusers';
    }
}