ApiQueryAllUsers.php

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<?php
class ApiQueryAllUsers extends ApiQueryBase {
    public function __construct( ApiQuery $query, $moduleName ) {
        parent::__construct( $query, $moduleName, 'au' );
    }

    private function getCanonicalUserName( $name ) {
        return strtr( $name, '_', ' ' );
    }

    public function execute() {
        global $wgActorTableSchemaMigrationStage;

        $params = $this->extractRequestParams();
        $activeUserDays = $this->getConfig()->get( 'ActiveUserDays' );

        $db = $this->getDB();
        $commentStore = CommentStore::getStore();

        $prop = $params['prop'];
        if ( !is_null( $prop ) ) {
            $prop = array_flip( $prop );
            $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 = is_null( $params['from'] ) ? null : $this->getCanonicalUserName( $params['from'] );
        $to = is_null( $params['to'] ) ? 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 ( !is_null( $params['prefix'] ) ) {
            $this->addWhere( $userFieldToSort .
                $db->buildLike( $this->getCanonicalUserName( $params['prefix'] ), $db->anyString() ) );
        }

        if ( !is_null( $params['rights'] ) && count( $params['rights'] ) ) {
            $groups = [];
            foreach ( $params['rights'] as $r ) {
                $groups = array_merge( $groups, User::getGroupsWithPermission( $r ) );
            }

            // no group with the given right(s) exists, no need for a query
            if ( $groups === [] ) {
                $this->getResult()->addIndexedTagName( [ 'query', $this->getModuleName() ], '' );

                return;
            }

            $groups = array_unique( $groups );

            if ( is_null( $params['group'] ) ) {
                $params['group'] = $groups;
            } else {
                $params['group'] = array_unique( array_merge( $params['group'], $groups ) );
            }
        }

        $this->requireMaxOneParameter( $params, 'group', 'excludegroup' );

        if ( !is_null( $params['group'] ) && 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 ( !is_null( $params['excludegroup'] ) && 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' );

            if ( count( $params['excludegroup'] ) == 1 ) {
                $exclude = [ 'ug1.ug_group' => $params['excludegroup'][0] ];
            } else {
                $exclude = [ $db->makeList(
                    [ 'ug1.ug_group' => $params['excludegroup'] ],
                    LIST_OR
                ) ];
            }
            $this->addJoinConds( [ 'ug1' => [ 'LEFT JOIN',
                array_merge( [
                    'ug1.ug_user=user_id',
                    'ug1.ug_expiry IS NULL OR ug1.ug_expiry >= ' . $db->addQuotes( $db->timestamp() )
                ], $exclude )
            ] ] );
            $this->addWhere( 'ug1.ug_user IS NULL' );
        }

        if ( $params['witheditsonly'] ) {
            $this->addWhere( 'user_editcount > 0' );
        }

        $this->showHiddenUsersAddBlockInfo( $fld_blockinfo );

        if ( $fld_groups || $fld_rights ) {
            $this->addFields( [ 'groups' =>
                $db->buildGroupConcatField( '|', 'user_groups', 'ug_group', [
                    'ug_user=user_id',
                    'ug_expiry IS NULL OR ug_expiry >= ' . $db->addQuotes( $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)
            $tables = [ 'recentchanges' ];
            $joins = [];
            if ( $wgActorTableSchemaMigrationStage & SCHEMA_COMPAT_READ_OLD ) {
                $userCond = 'rc_user_text = user_name';
            } else {
                $tables[] = 'actor';
                $joins['actor'] = [ 'JOIN', 'rc_actor = actor_id' ];
                $userCond = 'actor_user = user_id';
            }
            $timestamp = $db->timestamp( wfTimestamp( TS_UNIX ) - $activeUserSeconds );
            $this->addFields( [
                'recentactions' => '(' . $db->selectSQLText(
                    $tables,
                    'COUNT(*)',
                    [
                        $userCond,
                        'rc_type != ' . $db->addQuotes( RC_EXTERNAL ), // no wikidata
                        'rc_log_type IS NULL OR rc_log_type != ' . $db->addQuotes( 'newusers' ),
                        'rc_timestamp >= ' . $db->addQuotes( $timestamp ),
                    ],
                    __METHOD__,
                    [],
                    $joins
                ) . ')'
            ] );
        }

        $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();
        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 sanely 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'] && $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(), User::newFromId( $row->user_id ), $params['attachedwiki']
                );
            }

            if ( $fld_blockinfo && !is_null( $row->ipb_by_text ) ) {
                $data['blockid'] = (int)$row->ipb_id;
                $data['blockedby'] = $row->ipb_by_text;
                $data['blockedbyid'] = (int)$row->ipb_by;
                $data['blockedtimestamp'] = wfTimestamp( TS_ISO_8601, $row->ipb_timestamp );
                $data['blockreason'] = $commentStore->getComment( 'ipb_reason', $row )->text;
                $data['blockexpiry'] = $row->ipb_expiry;
            }
            if ( $row->ipb_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 = User::newFromId( $row->user_id )->getAutomaticGroups();
                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 ) {
                    $data['rights'] = User::getGroupPermissions( $groups );
                    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() {
        $userGroups = User::getAllGroups();

        return [
            'from' => null,
            'to' => null,
            'prefix' => null,
            'dir' => [
                ApiBase::PARAM_DFLT => 'ascending',
                ApiBase::PARAM_TYPE => [
                    'ascending',
                    'descending'
                ],
            ],
            'group' => [
                ApiBase::PARAM_TYPE => $userGroups,
                ApiBase::PARAM_ISMULTI => true,
            ],
            'excludegroup' => [
                ApiBase::PARAM_TYPE => $userGroups,
                ApiBase::PARAM_ISMULTI => true,
            ],
            'rights' => [
                ApiBase::PARAM_TYPE => User::getAllRights(),
                ApiBase::PARAM_ISMULTI => true,
            ],
            'prop' => [
                ApiBase::PARAM_ISMULTI => true,
                ApiBase::PARAM_TYPE => [
                    'blockinfo',
                    'groups',
                    'implicitgroups',
                    'rights',
                    'editcount',
                    'registration',
                    'centralids',
                ],
                ApiBase::PARAM_HELP_MSG_PER_VALUE => [],
            ],
            'limit' => [
                ApiBase::PARAM_DFLT => 10,
                ApiBase::PARAM_TYPE => 'limit',
                ApiBase::PARAM_MIN => 1,
                ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
                ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
            ],
            'witheditsonly' => false,
            'activeusers' => [
                ApiBase::PARAM_DFLT => false,
                ApiBase::PARAM_HELP_MSG => [
                    'apihelp-query+allusers-param-activeusers',
                    $this->getConfig()->get( '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';
    }
}