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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Extension\GlobalUsage; |
| 4 | |
| 5 | use IDBAccessObject; |
| 6 | use MediaWiki\Context\IContextSource; |
| 7 | use MediaWiki\Deferred\DeferredUpdates; |
| 8 | use MediaWiki\MediaWikiServices; |
| 9 | use MediaWiki\Title\Title; |
| 10 | use MediaWiki\WikiMap\WikiMap; |
| 11 | use Wikimedia\Rdbms\IDatabase; |
| 12 | |
| 13 | class GlobalUsage { |
| 14 | /** @var string */ |
| 15 | private $interwiki; |
| 16 | |
| 17 | /** |
| 18 | * @var IDatabase |
| 19 | */ |
| 20 | private $dbw; |
| 21 | |
| 22 | /** |
| 23 | * @var IDatabase |
| 24 | */ |
| 25 | private $dbr; |
| 26 | |
| 27 | /** |
| 28 | * Construct a GlobalUsage instance for a certain wiki. |
| 29 | * |
| 30 | * @param string $interwiki Interwiki prefix of the wiki |
| 31 | * @param IDatabase $dbw Database object for write (primary) |
| 32 | * @param IDatabase $dbr Database object for read (replica) |
| 33 | */ |
| 34 | public function __construct( $interwiki, IDatabase $dbw, IDatabase $dbr ) { |
| 35 | $this->interwiki = $interwiki; |
| 36 | $this->dbw = $dbw; |
| 37 | $this->dbr = $dbr; |
| 38 | } |
| 39 | |
| 40 | /** |
| 41 | * Sets the images used by a certain page |
| 42 | * |
| 43 | * @param Title $title Title of the page |
| 44 | * @param string[] $images Array of db keys of images used |
| 45 | * @param int $pageIdFlags |
| 46 | * @param int|null $ticket |
| 47 | */ |
| 48 | public function insertLinks( |
| 49 | Title $title, array $images, $pageIdFlags = IDBAccessObject::READ_LATEST, $ticket = null |
| 50 | ) { |
| 51 | global $wgUpdateRowsPerQuery; |
| 52 | |
| 53 | $insert = []; |
| 54 | foreach ( $images as $name ) { |
| 55 | $insert[] = [ |
| 56 | 'gil_wiki' => $this->interwiki, |
| 57 | 'gil_page' => $title->getArticleID( $pageIdFlags ), |
| 58 | 'gil_page_namespace_id' => $title->getNamespace(), |
| 59 | 'gil_page_namespace' => $title->getNsText(), |
| 60 | 'gil_page_title' => $title->getDBkey(), |
| 61 | 'gil_to' => $name |
| 62 | ]; |
| 63 | } |
| 64 | |
| 65 | $lbFactory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory(); |
| 66 | $ticket = $ticket ?: $lbFactory->getEmptyTransactionTicket( __METHOD__ ); |
| 67 | $insertBatches = array_chunk( $insert, $wgUpdateRowsPerQuery ); |
| 68 | foreach ( $insertBatches as $insertBatch ) { |
| 69 | $this->dbw->newInsertQueryBuilder() |
| 70 | ->insertInto( 'globalimagelinks' ) |
| 71 | ->ignore() |
| 72 | ->rows( $insertBatch ) |
| 73 | ->caller( __METHOD__ ) |
| 74 | ->execute(); |
| 75 | if ( count( $insertBatches ) > 1 ) { |
| 76 | $lbFactory->commitAndWaitForReplication( __METHOD__, $ticket ); |
| 77 | } |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * Get all global images from a certain page |
| 83 | * @param int $id |
| 84 | * @return string[] |
| 85 | */ |
| 86 | public function getLinksFromPage( $id ) { |
| 87 | return $this->dbr->newSelectQueryBuilder() |
| 88 | ->select( 'gil_to' ) |
| 89 | ->from( 'globalimagelinks' ) |
| 90 | ->where( [ |
| 91 | 'gil_wiki' => $this->interwiki, |
| 92 | 'gil_page' => $id, |
| 93 | ] ) |
| 94 | ->caller( __METHOD__ ) |
| 95 | ->fetchFieldValues(); |
| 96 | } |
| 97 | |
| 98 | /** |
| 99 | * Deletes all entries from a certain page to certain files |
| 100 | * |
| 101 | * @param int $id Page id of the page |
| 102 | * @param string[]|null $to File name(s) |
| 103 | * @param int|null $ticket |
| 104 | */ |
| 105 | public function deleteLinksFromPage( $id, array $to = null, $ticket = null ) { |
| 106 | global $wgUpdateRowsPerQuery; |
| 107 | |
| 108 | $where = [ |
| 109 | 'gil_wiki' => $this->interwiki, |
| 110 | 'gil_page' => $id |
| 111 | ]; |
| 112 | if ( $to ) { |
| 113 | $lbFactory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory(); |
| 114 | $ticket = $ticket ?: $lbFactory->getEmptyTransactionTicket( __METHOD__ ); |
| 115 | foreach ( array_chunk( $to, $wgUpdateRowsPerQuery ) as $toBatch ) { |
| 116 | $where['gil_to'] = $toBatch; |
| 117 | $this->dbw->newDeleteQueryBuilder() |
| 118 | ->deleteFrom( 'globalimagelinks' ) |
| 119 | ->where( $where ) |
| 120 | ->caller( __METHOD__ ) |
| 121 | ->execute(); |
| 122 | $lbFactory->commitAndWaitForReplication( __METHOD__, $ticket ); |
| 123 | } |
| 124 | } else { |
| 125 | $this->dbw->newDeleteQueryBuilder() |
| 126 | ->deleteFrom( 'globalimagelinks' ) |
| 127 | ->where( $where ) |
| 128 | ->caller( __METHOD__ ) |
| 129 | ->execute(); |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | /** |
| 134 | * Deletes all entries to a certain image |
| 135 | * |
| 136 | * @param Title $title Title of the file |
| 137 | */ |
| 138 | public function deleteLinksToFile( $title ) { |
| 139 | $this->dbw->newDeleteQueryBuilder() |
| 140 | ->deleteFrom( 'globalimagelinks' ) |
| 141 | ->where( [ |
| 142 | 'gil_wiki' => $this->interwiki, |
| 143 | 'gil_to' => $title->getDBkey() |
| 144 | ] ) |
| 145 | ->caller( __METHOD__ ) |
| 146 | ->execute(); |
| 147 | } |
| 148 | |
| 149 | /** |
| 150 | * Copy local links to global table |
| 151 | * |
| 152 | * @param Title $title Title of the file to copy entries from. |
| 153 | * @param IDatabase $localDbr Database object for reading the local links from |
| 154 | */ |
| 155 | public function copyLocalImagelinks( Title $title, IDatabase $localDbr ) { |
| 156 | $res = $localDbr->newSelectQueryBuilder() |
| 157 | ->select( [ 'il_to', 'page_id', 'page_namespace', 'page_title' ] ) |
| 158 | ->from( 'imagelinks' ) |
| 159 | ->join( 'page', null, 'il_from = page_id' ) |
| 160 | ->where( [ 'il_to' => $title->getDBkey() ] ) |
| 161 | ->caller( __METHOD__ ) |
| 162 | ->fetchResultSet(); |
| 163 | |
| 164 | if ( !$res->numRows() ) { |
| 165 | return; |
| 166 | } |
| 167 | |
| 168 | $insert = []; |
| 169 | $contLang = MediaWikiServices::getInstance()->getContentLanguage(); |
| 170 | foreach ( $res as $row ) { |
| 171 | $insert[] = [ |
| 172 | 'gil_wiki' => $this->interwiki, |
| 173 | 'gil_page' => $row->page_id, |
| 174 | 'gil_page_namespace_id' => $row->page_namespace, |
| 175 | 'gil_page_namespace' => $contLang->getNsText( $row->page_namespace ), |
| 176 | 'gil_page_title' => $row->page_title, |
| 177 | 'gil_to' => $row->il_to, |
| 178 | ]; |
| 179 | } |
| 180 | |
| 181 | $fname = __METHOD__; |
| 182 | DeferredUpdates::addCallableUpdate( function () use ( $insert, $fname ) { |
| 183 | $this->dbw->newInsertQueryBuilder() |
| 184 | ->insertInto( 'globalimagelinks' ) |
| 185 | ->ignore() |
| 186 | ->rows( $insert ) |
| 187 | ->caller( $fname ) |
| 188 | ->execute(); |
| 189 | } ); |
| 190 | } |
| 191 | |
| 192 | /** |
| 193 | * Changes the page title |
| 194 | * |
| 195 | * @param int $id Page id of the page |
| 196 | * @param Title $title New title of the page |
| 197 | */ |
| 198 | public function moveTo( $id, $title ) { |
| 199 | $this->dbw->newUpdateQueryBuilder() |
| 200 | ->update( 'globalimagelinks' ) |
| 201 | ->set( [ |
| 202 | 'gil_page_namespace_id' => $title->getNamespace(), |
| 203 | 'gil_page_namespace' => $title->getNsText(), |
| 204 | 'gil_page_title' => $title->getDBkey() |
| 205 | ] ) |
| 206 | ->where( [ |
| 207 | 'gil_wiki' => $this->interwiki, |
| 208 | 'gil_page' => $id |
| 209 | ] ) |
| 210 | ->caller( __METHOD__ ) |
| 211 | ->execute(); |
| 212 | } |
| 213 | |
| 214 | /** |
| 215 | * Utility function to redirect special pages that are only on the shared repo |
| 216 | * |
| 217 | * Putting here as this can be useful in multiple special page classes. |
| 218 | * This redirects the current page to the same page on the shared repo |
| 219 | * wiki, making sure to use the english name of the special page, in case the |
| 220 | * current wiki uses something other than english for its content language. |
| 221 | * |
| 222 | * @param IContextSource $context $this->getContext() from the special page. |
| 223 | */ |
| 224 | public static function redirectSpecialPageToSharedRepo( IContextSource $context ) { |
| 225 | global $wgGlobalUsageSharedRepoWiki; |
| 226 | // Make sure to get the "canonical" page name, and not a translation. |
| 227 | $titleText = $context->getTitle()->getDBkey(); |
| 228 | $services = MediaWikiServices::getInstance(); |
| 229 | [ $canonicalName, $subpage ] = $services->getSpecialPageFactory()->resolveAlias( $titleText ); |
| 230 | $canonicalName = $services->getNamespaceInfo()->getCanonicalName( NS_SPECIAL ) . ':' . $canonicalName; |
| 231 | if ( $subpage !== null ) { |
| 232 | $canonicalName .= '/' . $subpage; |
| 233 | } |
| 234 | |
| 235 | $url = WikiMap::getForeignURL( $wgGlobalUsageSharedRepoWiki, $canonicalName ); |
| 236 | if ( $url !== false ) { |
| 237 | // We have a url |
| 238 | $args = $context->getRequest()->getQueryValues(); |
| 239 | unset( $args['title'] ); |
| 240 | $url = wfAppendQuery( $url, $args ); |
| 241 | |
| 242 | $context->getOutput()->redirect( $url ); |
| 243 | } else { |
| 244 | // WikiMap can't find the url for the shared repo. |
| 245 | // Just pretend we don't exist in this case. |
| 246 | $context->getOutput()->setStatusCode( 404 ); |
| 247 | $context->getOutput()->showErrorPage( 'nosuchspecialpage', 'nospecialpagetext' ); |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | /** |
| 252 | * Are we currently on the shared repo? (Utility function) |
| 253 | * |
| 254 | * @note This assumes the user has a single shared repo. If the user has |
| 255 | * multiple/nested foreign repos, then its unclear what it means to |
| 256 | * be on the "shared repo". See discussion on bug 23136. |
| 257 | * @return bool |
| 258 | */ |
| 259 | public static function onSharedRepo() { |
| 260 | global $wgGlobalUsageSharedRepoWiki, $wgGlobalUsageDatabase; |
| 261 | if ( !$wgGlobalUsageSharedRepoWiki ) { |
| 262 | // backwards compatability with settings from before $wgGlobalUsageSharedRepoWiki |
| 263 | // was introduced. |
| 264 | return $wgGlobalUsageDatabase === WikiMap::getCurrentWikiId() || !$wgGlobalUsageDatabase; |
| 265 | } else { |
| 266 | return $wgGlobalUsageSharedRepoWiki === WikiMap::getCurrentWikiId(); |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | /** |
| 271 | * Query info for getting wanted files using global image links |
| 272 | * |
| 273 | * Adding a utility method here, as this same query is used in |
| 274 | * two different special page classes. |
| 275 | * |
| 276 | * @param string|bool $wiki |
| 277 | * @return array Query info array, as a QueryPage would expect. |
| 278 | */ |
| 279 | public static function getWantedFilesQueryInfo( $wiki = false ) { |
| 280 | $qi = [ |
| 281 | 'tables' => [ |
| 282 | 'globalimagelinks', |
| 283 | 'page', |
| 284 | 'redirect', |
| 285 | 'img1' => 'image', |
| 286 | 'img2' => 'image', |
| 287 | ], |
| 288 | 'fields' => [ |
| 289 | 'namespace' => NS_FILE, |
| 290 | 'title' => 'gil_to', |
| 291 | 'value' => 'COUNT(*)' |
| 292 | ], |
| 293 | 'conds' => [ |
| 294 | 'img1.img_name' => null, |
| 295 | // We also need to exclude file redirects |
| 296 | 'img2.img_name' => null, |
| 297 | ], |
| 298 | 'options' => [ 'GROUP BY' => 'gil_to' ], |
| 299 | 'join_conds' => [ |
| 300 | 'img1' => [ 'LEFT JOIN', |
| 301 | 'gil_to = img1.img_name' |
| 302 | ], |
| 303 | 'page' => [ 'LEFT JOIN', [ |
| 304 | 'gil_to = page_title', |
| 305 | 'page_namespace' => NS_FILE, |
| 306 | ] ], |
| 307 | 'redirect' => [ 'LEFT JOIN', [ |
| 308 | 'page_id = rd_from', |
| 309 | 'rd_namespace' => NS_FILE, |
| 310 | 'rd_interwiki' => '' |
| 311 | ] ], |
| 312 | 'img2' => [ 'LEFT JOIN', |
| 313 | 'rd_title = img2.img_name' |
| 314 | ] |
| 315 | ] |
| 316 | ]; |
| 317 | if ( $wiki !== false ) { |
| 318 | // Limit to just one wiki. |
| 319 | $qi['conds']['gil_wiki'] = $wiki; |
| 320 | } |
| 321 | |
| 322 | return $qi; |
| 323 | } |
| 324 | |
| 325 | /** |
| 326 | * @param int $index DB_PRIMARY/DB_REPLICA |
| 327 | * @param array $groups |
| 328 | * @return IDatabase |
| 329 | */ |
| 330 | public static function getGlobalDB( $index, $groups = [] ) { |
| 331 | global $wgGlobalUsageDatabase; |
| 332 | |
| 333 | $lbFactory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory(); |
| 334 | $lb = $lbFactory->getMainLB( $wgGlobalUsageDatabase ); |
| 335 | |
| 336 | return $lb->getConnection( $index, [], $wgGlobalUsageDatabase ); |
| 337 | } |
| 338 | } |