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+<?php
+/**
+ * Query the list of contributors to a page
+ *
+ * Created on Nov 14, 2013
+ *
+ * Copyright © 2013 Brad Jorsch
+ *
+ * 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
+ * @since 1.23
+ */
+
+/**
+ * A query module to show contributors to a page
+ *
+ * @ingroup API
+ * @since 1.23
+ */
+class ApiQueryContributors extends ApiQueryBase {
+ /** We don't want to process too many pages at once (it hits cold
+ * database pages too heavily), so only do the first MAX_PAGES input pages
+ * in each API call (leaving the rest for continuation).
+ */
+ const MAX_PAGES = 100;
+
+ public function __construct( ApiQuery $query, $moduleName ) {
+ // "pc" is short for "page contributors", "co" was already taken by the
+ // GeoData extension's prop=coordinates.
+ parent::__construct( $query, $moduleName, 'pc' );
+ }
+
+ public function execute() {
+ $db = $this->getDB();
+ $params = $this->extractRequestParams();
+ $this->requireMaxOneParameter( $params, 'group', 'excludegroup', 'rights', 'excluderights' );
+
+ // Only operate on existing pages
+ $pages = array_keys( $this->getPageSet()->getGoodTitles() );
+
+ // Filter out already-processed pages
+ if ( $params['continue'] !== null ) {
+ $cont = explode( '|', $params['continue'] );
+ $this->dieContinueUsageIf( count( $cont ) != 2 );
+ $cont_page = (int)$cont[0];
+ $pages = array_filter( $pages, function ( $v ) use ( $cont_page ) {
+ return $v >= $cont_page;
+ } );
+ }
+ if ( !count( $pages ) ) {
+ // Nothing to do
+ return;
+ }
+
+ // Apply MAX_PAGES, leaving any over the limit for a continue.
+ sort( $pages );
+ $continuePages = null;
+ if ( count( $pages ) > self::MAX_PAGES ) {
+ $continuePages = $pages[self::MAX_PAGES] . '|0';
+ $pages = array_slice( $pages, 0, self::MAX_PAGES );
+ }
+
+ $result = $this->getResult();
+
+ // First, count anons
+ $this->addTables( 'revision' );
+ $this->addFields( array(
+ 'page' => 'rev_page',
+ 'anons' => 'COUNT(DISTINCT rev_user_text)',
+ ) );
+ $this->addWhereFld( 'rev_page', $pages );
+ $this->addWhere( 'rev_user = 0' );
+ $this->addWhere( $db->bitAnd( 'rev_deleted', Revision::DELETED_USER ) . ' = 0' );
+ $this->addOption( 'GROUP BY', 'rev_page' );
+ $res = $this->select( __METHOD__ );
+ foreach ( $res as $row ) {
+ $fit = $result->addValue( array( 'query', 'pages', $row->page ),
+ 'anoncontributors', $row->anons
+ );
+ if ( !$fit ) {
+ // This not fitting isn't reasonable, so it probably means that
+ // some other module used up all the space. Just set a dummy
+ // continue and hope it works next time.
+ $this->setContinueEnumParameter( 'continue',
+ $params['continue'] !== null ? $params['continue'] : '0|0'
+ );
+
+ return;
+ }
+ }
+
+ // Next, add logged-in users
+ $this->resetQueryParams();
+ $this->addTables( 'revision' );
+ $this->addFields( array(
+ 'page' => 'rev_page',
+ 'user' => 'rev_user',
+ 'username' => 'MAX(rev_user_text)', // Non-MySQL databases don't like partial group-by
+ ) );
+ $this->addWhereFld( 'rev_page', $pages );
+ $this->addWhere( 'rev_user != 0' );
+ $this->addWhere( $db->bitAnd( 'rev_deleted', Revision::DELETED_USER ) . ' = 0' );
+ $this->addOption( 'GROUP BY', 'rev_page, rev_user' );
+ $this->addOption( 'LIMIT', $params['limit'] + 1 );
+
+ // Force a sort order to ensure that properties are grouped by page
+ // But only if pp_page is not constant in the WHERE clause.
+ if ( count( $pages ) > 1 ) {
+ $this->addOption( 'ORDER BY', 'rev_page, rev_user' );
+ } else {
+ $this->addOption( 'ORDER BY', 'rev_user' );
+ }
+
+ $limitGroups = array();
+ if ( $params['group'] ) {
+ $excludeGroups = false;
+ $limitGroups = $params['group'];
+ } elseif ( $params['excludegroup'] ) {
+ $excludeGroups = true;
+ $limitGroups = $params['excludegroup'];
+ } elseif ( $params['rights'] ) {
+ $excludeGroups = false;
+ foreach ( $params['rights'] as $r ) {
+ $limitGroups = array_merge( $limitGroups, User::getGroupsWithPermission( $r ) );
+ }
+
+ // If no group has the rights requested, no need to query
+ if ( !$limitGroups ) {
+ if ( $continuePages !== null ) {
+ // But we still need to continue for the next page's worth
+ // of anoncontributors
+ $this->setContinueEnumParameter( 'continue', $continuePages );
+ }
+
+ return;
+ }
+ } elseif ( $params['excluderights'] ) {
+ $excludeGroups = true;
+ foreach ( $params['excluderights'] as $r ) {
+ $limitGroups = array_merge( $limitGroups, User::getGroupsWithPermission( $r ) );
+ }
+ }
+
+ if ( $limitGroups ) {
+ $limitGroups = array_unique( $limitGroups );
+ $this->addTables( 'user_groups' );
+ $this->addJoinConds( array( 'user_groups' => array(
+ $excludeGroups ? 'LEFT OUTER JOIN' : 'INNER JOIN',
+ array( 'ug_user=rev_user', 'ug_group' => $limitGroups )
+ ) ) );
+ $this->addWhereIf( 'ug_user IS NULL', $excludeGroups );
+ }
+
+ if ( $params['continue'] !== null ) {
+ $cont = explode( '|', $params['continue'] );
+ $this->dieContinueUsageIf( count( $cont ) != 2 );
+ $cont_page = (int)$cont[0];
+ $cont_user = (int)$cont[1];
+ $this->addWhere(
+ "rev_page > $cont_page OR " .
+ "(rev_page = $cont_page AND " .
+ "rev_user >= $cont_user)"
+ );
+ }
+
+ $res = $this->select( __METHOD__ );
+ $count = 0;
+ foreach ( $res as $row ) {
+ if ( ++$count > $params['limit'] ) {
+ // We've reached the one extra which shows that
+ // there are additional pages to be had. Stop here...
+ $this->setContinueEnumParameter( 'continue', $row->page . '|' . $row->user );
+
+ return;
+ }
+
+ $fit = $this->addPageSubItem( $row->page,
+ array( 'userid' => $row->user, 'name' => $row->username ),
+ 'user'
+ );
+ if ( !$fit ) {
+ $this->setContinueEnumParameter( 'continue', $row->page . '|' . $row->user );
+
+ return;
+ }
+ }
+
+ if ( $continuePages !== null ) {
+ $this->setContinueEnumParameter( 'continue', $continuePages );
+ }
+ }
+
+ public function getCacheMode( $params ) {
+ return 'public';
+ }
+
+ public function getAllowedParams() {
+ $userGroups = User::getAllGroups();
+ $userRights = User::getAllRights();
+
+ return array(
+ 'group' => array(
+ ApiBase::PARAM_TYPE => $userGroups,
+ ApiBase::PARAM_ISMULTI => true,
+ ),
+ 'excludegroup' => array(
+ ApiBase::PARAM_TYPE => $userGroups,
+ ApiBase::PARAM_ISMULTI => true,
+ ),
+ 'rights' => array(
+ ApiBase::PARAM_TYPE => $userRights,
+ ApiBase::PARAM_ISMULTI => true,
+ ),
+ 'excluderights' => array(
+ ApiBase::PARAM_TYPE => $userRights,
+ ApiBase::PARAM_ISMULTI => true,
+ ),
+ 'limit' => array(
+ ApiBase::PARAM_DFLT => 10,
+ ApiBase::PARAM_TYPE => 'limit',
+ ApiBase::PARAM_MIN => 1,
+ ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
+ ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
+ ),
+ 'continue' => null,
+ );
+ }
+
+ public function getParamDescription() {
+ return array(
+ 'group' => array(
+ 'Limit users to given group name(s)',
+ 'Does not include implicit or auto-promoted groups like *, user, or autoconfirmed'
+ ),
+ 'excludegroup' => array(
+ 'Exclude users in given group name(s)',
+ 'Does not include implicit or auto-promoted groups like *, user, or autoconfirmed'
+ ),
+ 'rights' => array(
+ 'Limit users to those having given right(s)',
+ 'Does not include rights granted by implicit or auto-promoted groups ' .
+ 'like *, user, or autoconfirmed'
+ ),
+ 'excluderights' => array(
+ 'Limit users to those not having given right(s)',
+ 'Does not include rights granted by implicit or auto-promoted groups ' .
+ 'like *, user, or autoconfirmed'
+ ),
+ 'limit' => 'How many contributors to return',
+ 'continue' => 'When more results are available, use this to continue',
+ );
+ }
+
+ public function getDescription() {
+ return 'Get the list of logged-in contributors and ' .
+ 'the count of anonymous contributors to a page.';
+ }
+
+ public function getExamples() {
+ return array(
+ 'api.php?action=query&prop=contributors&titles=Main_Page',
+ );
+ }
+
+ public function getHelpUrls() {
+ return 'https://www.mediawiki.org/wiki/API:Properties#contributors_.2F_pc';
+ }
+}
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