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| 1 | <?php |
| 2 | /** |
| 3 | * Query the list of contributors to a page |
| 4 | * |
| 5 | * Copyright © 2013 Wikimedia Foundation and contributors |
| 6 | * |
| 7 | * @license GPL-2.0-or-later |
| 8 | * @file |
| 9 | * @since 1.23 |
| 10 | */ |
| 11 | |
| 12 | namespace MediaWiki\Api; |
| 13 | |
| 14 | use MediaWiki\Permissions\GroupPermissionsLookup; |
| 15 | use MediaWiki\Revision\RevisionRecord; |
| 16 | use MediaWiki\Revision\RevisionStore; |
| 17 | use MediaWiki\Title\Title; |
| 18 | use MediaWiki\User\ActorMigration; |
| 19 | use MediaWiki\User\TempUser\TempUserConfig; |
| 20 | use MediaWiki\User\UserGroupManager; |
| 21 | use Wikimedia\ParamValidator\ParamValidator; |
| 22 | use Wikimedia\ParamValidator\TypeDef\IntegerDef; |
| 23 | |
| 24 | /** |
| 25 | * A query module to show contributors to a page |
| 26 | * |
| 27 | * @ingroup API |
| 28 | * @since 1.23 |
| 29 | */ |
| 30 | class ApiQueryContributors extends ApiQueryBase { |
| 31 | /** We don't want to process too many pages at once (it hits cold |
| 32 | * database pages too heavily), so only do the first MAX_PAGES input pages |
| 33 | * in each API call (leaving the rest for continuation). |
| 34 | */ |
| 35 | private const MAX_PAGES = 100; |
| 36 | |
| 37 | public function __construct( |
| 38 | ApiQuery $query, |
| 39 | string $moduleName, |
| 40 | private readonly RevisionStore $revisionStore, |
| 41 | private readonly ActorMigration $actorMigration, |
| 42 | private readonly UserGroupManager $userGroupManager, |
| 43 | private readonly GroupPermissionsLookup $groupPermissionsLookup, |
| 44 | private readonly TempUserConfig $tempUserConfig, |
| 45 | ) { |
| 46 | // "pc" is short for "page contributors", "co" was already taken by the |
| 47 | // GeoData extension's prop=coordinates. |
| 48 | parent::__construct( $query, $moduleName, 'pc' ); |
| 49 | } |
| 50 | |
| 51 | public function execute() { |
| 52 | $db = $this->getDB(); |
| 53 | $params = $this->extractRequestParams(); |
| 54 | $this->requireMaxOneParameter( $params, 'group', 'excludegroup', 'rights', 'excluderights' ); |
| 55 | |
| 56 | // Only operate on existing pages |
| 57 | $pages = array_keys( $this->getPageSet()->getGoodPages() ); |
| 58 | |
| 59 | // Filter out already-processed pages |
| 60 | if ( $params['continue'] !== null ) { |
| 61 | $cont = $this->parseContinueParamOrDie( $params['continue'], [ 'int', 'int' ] ); |
| 62 | $cont_page = (int)$cont[0]; |
| 63 | $pages = array_filter( $pages, static function ( $v ) use ( $cont_page ) { |
| 64 | return $v >= $cont_page; |
| 65 | } ); |
| 66 | } |
| 67 | if ( $pages === [] ) { |
| 68 | // Nothing to do |
| 69 | return; |
| 70 | } |
| 71 | |
| 72 | // Apply MAX_PAGES, leaving any over the limit for a continue. |
| 73 | sort( $pages ); |
| 74 | $continuePages = null; |
| 75 | if ( count( $pages ) > self::MAX_PAGES ) { |
| 76 | $continuePages = $pages[self::MAX_PAGES] . '|0'; |
| 77 | $pages = array_slice( $pages, 0, self::MAX_PAGES ); |
| 78 | } |
| 79 | |
| 80 | $result = $this->getResult(); |
| 81 | $revQuery = $this->revisionStore->getQueryInfo(); |
| 82 | $pageField = 'rev_page'; |
| 83 | $idField = 'rev_actor'; |
| 84 | $countField = 'rev_actor'; |
| 85 | |
| 86 | // First, count anons |
| 87 | $this->addTables( $revQuery['tables'] ); |
| 88 | $this->addJoinConds( $revQuery['joins'] ); |
| 89 | $this->addFields( [ |
| 90 | 'page' => $pageField, |
| 91 | 'anons' => "COUNT(DISTINCT $countField)", |
| 92 | ] ); |
| 93 | $this->addWhereFld( $pageField, $pages ); |
| 94 | $this->addWhere( $this->actorMigration->isAnon( $revQuery['fields']['rev_user'] ) ); |
| 95 | $this->addWhere( [ $db->bitAnd( 'rev_deleted', RevisionRecord::DELETED_USER ) => 0 ] ); |
| 96 | $this->addOption( 'GROUP BY', $pageField ); |
| 97 | $res = $this->select( __METHOD__ ); |
| 98 | foreach ( $res as $row ) { |
| 99 | $fit = $result->addValue( [ 'query', 'pages', $row->page ], |
| 100 | 'anoncontributors', (int)$row->anons |
| 101 | ); |
| 102 | if ( !$fit ) { |
| 103 | // This not fitting isn't reasonable, so it probably means that |
| 104 | // some other module used up all the space. Just set a dummy |
| 105 | // continue and hope it works next time. |
| 106 | $this->setContinueEnumParameter( 'continue', |
| 107 | $params['continue'] ?? '0|0' |
| 108 | ); |
| 109 | |
| 110 | return; |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | // Next, add logged-in users |
| 115 | $this->resetQueryParams(); |
| 116 | $this->addTables( $revQuery['tables'] ); |
| 117 | $this->addJoinConds( $revQuery['joins'] ); |
| 118 | $this->addFields( [ |
| 119 | 'page' => $pageField, |
| 120 | 'id' => $idField, |
| 121 | // Non-MySQL databases don't like partial group-by |
| 122 | 'userid' => 'MAX(' . $revQuery['fields']['rev_user'] . ')', |
| 123 | 'username' => 'MAX(' . $revQuery['fields']['rev_user_text'] . ')', |
| 124 | ] ); |
| 125 | $this->addWhereFld( $pageField, $pages ); |
| 126 | $this->addWhere( $this->actorMigration->isNotAnon( $revQuery['fields']['rev_user'] ) ); |
| 127 | $this->addWhere( [ $db->bitAnd( 'rev_deleted', RevisionRecord::DELETED_USER ) => 0 ] ); |
| 128 | $this->addOption( 'GROUP BY', [ $pageField, $idField ] ); |
| 129 | $this->addOption( 'LIMIT', $params['limit'] + 1 ); |
| 130 | |
| 131 | // Force a sort order to ensure that properties are grouped by page |
| 132 | // But only if rev_page is not constant in the WHERE clause. |
| 133 | if ( count( $pages ) > 1 ) { |
| 134 | $this->addOption( 'ORDER BY', [ 'page', 'id' ] ); |
| 135 | } else { |
| 136 | $this->addOption( 'ORDER BY', 'id' ); |
| 137 | } |
| 138 | |
| 139 | $limitGroups = []; |
| 140 | if ( $params['group'] ) { |
| 141 | $excludeGroups = false; |
| 142 | $limitGroups = $params['group']; |
| 143 | } elseif ( $params['excludegroup'] ) { |
| 144 | $excludeGroups = true; |
| 145 | $limitGroups = $params['excludegroup']; |
| 146 | } elseif ( $params['rights'] ) { |
| 147 | $excludeGroups = false; |
| 148 | foreach ( $params['rights'] as $r ) { |
| 149 | $limitGroups = array_merge( $limitGroups, |
| 150 | $this->groupPermissionsLookup->getGroupsWithPermission( $r ) ); |
| 151 | } |
| 152 | |
| 153 | // If no group has the rights requested, no need to query |
| 154 | if ( !$limitGroups ) { |
| 155 | if ( $continuePages !== null ) { |
| 156 | // But we still need to continue for the next page's worth |
| 157 | // of anoncontributors |
| 158 | $this->setContinueEnumParameter( 'continue', $continuePages ); |
| 159 | } |
| 160 | |
| 161 | return; |
| 162 | } |
| 163 | } elseif ( $params['excluderights'] ) { |
| 164 | $excludeGroups = true; |
| 165 | foreach ( $params['excluderights'] as $r ) { |
| 166 | $limitGroups = array_merge( $limitGroups, |
| 167 | $this->groupPermissionsLookup->getGroupsWithPermission( $r ) ); |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | if ( $limitGroups ) { |
| 172 | $limitGroups = array_unique( $limitGroups ); |
| 173 | $this->addTables( 'user_groups' ); |
| 174 | $this->addJoinConds( [ 'user_groups' => [ |
| 175 | // @phan-suppress-next-line PhanPossiblyUndeclaredVariable excludeGroups declared when limitGroups set |
| 176 | $excludeGroups ? 'LEFT JOIN' : 'JOIN', |
| 177 | [ |
| 178 | 'ug_user=' . $revQuery['fields']['rev_user'], |
| 179 | 'ug_group' => $limitGroups, |
| 180 | $db->expr( 'ug_expiry', '=', null )->or( 'ug_expiry', '>=', $db->timestamp() ) |
| 181 | ] |
| 182 | ] ] ); |
| 183 | // @phan-suppress-next-next-line PhanPossiblyUndeclaredVariable |
| 184 | // excludeGroups declared when limitGroups set |
| 185 | $this->addWhereIf( [ 'ug_user' => null ], $excludeGroups ); |
| 186 | } |
| 187 | |
| 188 | if ( $params['continue'] !== null ) { |
| 189 | $cont = $this->parseContinueParamOrDie( $params['continue'], [ 'int', 'int' ] ); |
| 190 | $this->addWhere( $db->buildComparison( '>=', [ |
| 191 | $pageField => $cont[0], |
| 192 | $idField => $cont[1], |
| 193 | ] ) ); |
| 194 | } |
| 195 | |
| 196 | $res = $this->select( __METHOD__ ); |
| 197 | $count = 0; |
| 198 | foreach ( $res as $row ) { |
| 199 | if ( ++$count > $params['limit'] ) { |
| 200 | // We've reached the one extra which shows that |
| 201 | // there are additional pages to be had. Stop here... |
| 202 | $this->setContinueEnumParameter( 'continue', $row->page . '|' . $row->id ); |
| 203 | return; |
| 204 | } |
| 205 | |
| 206 | $fit = $this->addPageSubItem( $row->page, |
| 207 | [ 'userid' => (int)$row->userid, 'name' => $row->username ], |
| 208 | 'user' |
| 209 | ); |
| 210 | if ( !$fit ) { |
| 211 | $this->setContinueEnumParameter( 'continue', $row->page . '|' . $row->id ); |
| 212 | return; |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | if ( $continuePages !== null ) { |
| 217 | $this->setContinueEnumParameter( 'continue', $continuePages ); |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | /** @inheritDoc */ |
| 222 | public function getCacheMode( $params ) { |
| 223 | return 'public'; |
| 224 | } |
| 225 | |
| 226 | /** @inheritDoc */ |
| 227 | public function getAllowedParams( $flags = 0 ) { |
| 228 | $userGroups = $this->userGroupManager->listAllGroups(); |
| 229 | $userRights = $this->getPermissionManager()->getAllPermissions(); |
| 230 | |
| 231 | if ( $flags & ApiBase::GET_VALUES_FOR_HELP ) { |
| 232 | sort( $userGroups ); |
| 233 | } |
| 234 | |
| 235 | return [ |
| 236 | 'group' => [ |
| 237 | ParamValidator::PARAM_TYPE => $userGroups, |
| 238 | ParamValidator::PARAM_ISMULTI => true, |
| 239 | ], |
| 240 | 'excludegroup' => [ |
| 241 | ParamValidator::PARAM_TYPE => $userGroups, |
| 242 | ParamValidator::PARAM_ISMULTI => true, |
| 243 | ], |
| 244 | 'rights' => [ |
| 245 | ParamValidator::PARAM_TYPE => $userRights, |
| 246 | ParamValidator::PARAM_ISMULTI => true, |
| 247 | ], |
| 248 | 'excluderights' => [ |
| 249 | ParamValidator::PARAM_TYPE => $userRights, |
| 250 | ParamValidator::PARAM_ISMULTI => true, |
| 251 | ], |
| 252 | 'limit' => [ |
| 253 | ParamValidator::PARAM_DEFAULT => 10, |
| 254 | ParamValidator::PARAM_TYPE => 'limit', |
| 255 | IntegerDef::PARAM_MIN => 1, |
| 256 | IntegerDef::PARAM_MAX => ApiBase::LIMIT_BIG1, |
| 257 | IntegerDef::PARAM_MAX2 => ApiBase::LIMIT_BIG2 |
| 258 | ], |
| 259 | 'continue' => [ |
| 260 | ApiBase::PARAM_HELP_MSG => 'api-help-param-continue', |
| 261 | ], |
| 262 | ]; |
| 263 | } |
| 264 | |
| 265 | /** @inheritDoc */ |
| 266 | protected function getExamplesMessages() { |
| 267 | $title = Title::newMainPage()->getPrefixedText(); |
| 268 | $mp = rawurlencode( $title ); |
| 269 | |
| 270 | return [ |
| 271 | "action=query&prop=contributors&titles={$mp}" |
| 272 | => 'apihelp-query+contributors-example-simple', |
| 273 | ]; |
| 274 | } |
| 275 | |
| 276 | /** @inheritDoc */ |
| 277 | public function getHelpUrls() { |
| 278 | return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Contributors'; |
| 279 | } |
| 280 | |
| 281 | /** @inheritDoc */ |
| 282 | protected function getSummaryMessage() { |
| 283 | if ( $this->tempUserConfig->isKnown() ) { |
| 284 | return 'apihelp-query+contributors-summary-tempusers-enabled'; |
| 285 | } |
| 286 | return parent::getSummaryMessage(); |
| 287 | } |
| 288 | } |
| 289 | |
| 290 | /** @deprecated class alias since 1.43 */ |
| 291 | class_alias( ApiQueryContributors::class, 'ApiQueryContributors' ); |