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+<?php
+/**
+ * Base code for "query" special pages.
+ *
+ * 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
+ * @ingroup SpecialPage
+ */
+
+use Wikimedia\Rdbms\IResultWrapper;
+use Wikimedia\Rdbms\IDatabase;
+use Wikimedia\Rdbms\DBError;
+
+/**
+ * This is a class for doing query pages; since they're almost all the same,
+ * we factor out some of the functionality into a superclass, and let
+ * subclasses derive from it.
+ * @ingroup SpecialPage
+ */
+abstract class QueryPage extends SpecialPage {
+ /** @var bool Whether or not we want plain listoutput rather than an ordered list */
+ protected $listoutput = false;
+
+ /** @var int The offset and limit in use, as passed to the query() function */
+ protected $offset = 0;
+
+ /** @var int */
+ protected $limit = 0;
+
+ /**
+ * The number of rows returned by the query. Reading this variable
+ * only makes sense in functions that are run after the query has been
+ * done, such as preprocessResults() and formatRow().
+ */
+ protected $numRows;
+
+ protected $cachedTimestamp = null;
+
+ /**
+ * Whether to show prev/next links
+ */
+ protected $shownavigation = true;
+
+ /**
+ * Get a list of query page classes and their associated special pages,
+ * for periodic updates.
+ *
+ * DO NOT CHANGE THIS LIST without testing that
+ * maintenance/updateSpecialPages.php still works.
+ * @return array
+ */
+ public static function getPages() {
+ static $qp = null;
+
+ if ( $qp === null ) {
+ // QueryPage subclass, Special page name
+ $qp = [
+ [ AncientPagesPage::class, 'Ancientpages' ],
+ [ BrokenRedirectsPage::class, 'BrokenRedirects' ],
+ [ DeadendPagesPage::class, 'Deadendpages' ],
+ [ DoubleRedirectsPage::class, 'DoubleRedirects' ],
+ [ FileDuplicateSearchPage::class, 'FileDuplicateSearch' ],
+ [ ListDuplicatedFilesPage::class, 'ListDuplicatedFiles' ],
+ [ LinkSearchPage::class, 'LinkSearch' ],
+ [ ListredirectsPage::class, 'Listredirects' ],
+ [ LonelyPagesPage::class, 'Lonelypages' ],
+ [ LongPagesPage::class, 'Longpages' ],
+ [ MediaStatisticsPage::class, 'MediaStatistics' ],
+ [ MIMEsearchPage::class, 'MIMEsearch' ],
+ [ MostcategoriesPage::class, 'Mostcategories' ],
+ [ MostimagesPage::class, 'Mostimages' ],
+ [ MostinterwikisPage::class, 'Mostinterwikis' ],
+ [ MostlinkedCategoriesPage::class, 'Mostlinkedcategories' ],
+ [ MostlinkedTemplatesPage::class, 'Mostlinkedtemplates' ],
+ [ MostlinkedPage::class, 'Mostlinked' ],
+ [ MostrevisionsPage::class, 'Mostrevisions' ],
+ [ FewestrevisionsPage::class, 'Fewestrevisions' ],
+ [ ShortPagesPage::class, 'Shortpages' ],
+ [ UncategorizedCategoriesPage::class, 'Uncategorizedcategories' ],
+ [ UncategorizedPagesPage::class, 'Uncategorizedpages' ],
+ [ UncategorizedImagesPage::class, 'Uncategorizedimages' ],
+ [ UncategorizedTemplatesPage::class, 'Uncategorizedtemplates' ],
+ [ UnusedCategoriesPage::class, 'Unusedcategories' ],
+ [ UnusedimagesPage::class, 'Unusedimages' ],
+ [ WantedCategoriesPage::class, 'Wantedcategories' ],
+ [ WantedFilesPage::class, 'Wantedfiles' ],
+ [ WantedPagesPage::class, 'Wantedpages' ],
+ [ WantedTemplatesPage::class, 'Wantedtemplates' ],
+ [ UnwatchedpagesPage::class, 'Unwatchedpages' ],
+ [ UnusedtemplatesPage::class, 'Unusedtemplates' ],
+ [ WithoutInterwikiPage::class, 'Withoutinterwiki' ],
+ ];
+ Hooks::run( 'wgQueryPages', [ &$qp ] );
+ }
+
+ return $qp;
+ }
+
+ /**
+ * A mutator for $this->listoutput;
+ *
+ * @param bool $bool
+ */
+ function setListoutput( $bool ) {
+ $this->listoutput = $bool;
+ }
+
+ /**
+ * Subclasses return an SQL query here, formatted as an array with the
+ * following keys:
+ * tables => Table(s) for passing to Database::select()
+ * fields => Field(s) for passing to Database::select(), may be *
+ * conds => WHERE conditions
+ * options => options
+ * join_conds => JOIN conditions
+ *
+ * Note that the query itself should return the following three columns:
+ * 'namespace', 'title', and 'value'. 'value' is used for sorting.
+ *
+ * These may be stored in the querycache table for expensive queries,
+ * and that cached data will be returned sometimes, so the presence of
+ * extra fields can't be relied upon. The cached 'value' column will be
+ * an integer; non-numeric values are useful only for sorting the
+ * initial query (except if they're timestamps, see usesTimestamps()).
+ *
+ * Don't include an ORDER or LIMIT clause, they will be added.
+ *
+ * If this function is not overridden or returns something other than
+ * an array, getSQL() will be used instead. This is for backwards
+ * compatibility only and is strongly deprecated.
+ * @return array
+ * @since 1.18
+ */
+ public function getQueryInfo() {
+ return null;
+ }
+
+ /**
+ * For back-compat, subclasses may return a raw SQL query here, as a string.
+ * This is strongly deprecated; getQueryInfo() should be overridden instead.
+ * @throws MWException
+ * @return string
+ */
+ function getSQL() {
+ /* Implement getQueryInfo() instead */
+ throw new MWException( "Bug in a QueryPage: doesn't implement getQueryInfo() nor "
+ . "getQuery() properly" );
+ }
+
+ /**
+ * Subclasses return an array of fields to order by here. Don't append
+ * DESC to the field names, that'll be done automatically if
+ * sortDescending() returns true.
+ * @return array
+ * @since 1.18
+ */
+ function getOrderFields() {
+ return [ 'value' ];
+ }
+
+ /**
+ * Does this query return timestamps rather than integers in its
+ * 'value' field? If true, this class will convert 'value' to a
+ * UNIX timestamp for caching.
+ * NOTE: formatRow() may get timestamps in TS_MW (mysql), TS_DB (pgsql)
+ * or TS_UNIX (querycache) format, so be sure to always run them
+ * through wfTimestamp()
+ * @return bool
+ * @since 1.18
+ */
+ public function usesTimestamps() {
+ return false;
+ }
+
+ /**
+ * Override to sort by increasing values
+ *
+ * @return bool
+ */
+ function sortDescending() {
+ return true;
+ }
+
+ /**
+ * Is this query expensive (for some definition of expensive)? Then we
+ * don't let it run in miser mode. $wgDisableQueryPages causes all query
+ * pages to be declared expensive. Some query pages are always expensive.
+ *
+ * @return bool
+ */
+ public function isExpensive() {
+ return $this->getConfig()->get( 'DisableQueryPages' );
+ }
+
+ /**
+ * Is the output of this query cacheable? Non-cacheable expensive pages
+ * will be disabled in miser mode and will not have their results written
+ * to the querycache table.
+ * @return bool
+ * @since 1.18
+ */
+ public function isCacheable() {
+ return true;
+ }
+
+ /**
+ * Whether or not the output of the page in question is retrieved from
+ * the database cache.
+ *
+ * @return bool
+ */
+ public function isCached() {
+ return $this->isExpensive() && $this->getConfig()->get( 'MiserMode' );
+ }
+
+ /**
+ * Sometime we don't want to build rss / atom feeds.
+ *
+ * @return bool
+ */
+ function isSyndicated() {
+ return true;
+ }
+
+ /**
+ * Formats the results of the query for display. The skin is the current
+ * skin; you can use it for making links. The result is a single row of
+ * result data. You should be able to grab SQL results off of it.
+ * If the function returns false, the line output will be skipped.
+ * @param Skin $skin
+ * @param object $result Result row
+ * @return string|bool String or false to skip
+ */
+ abstract function formatResult( $skin, $result );
+
+ /**
+ * The content returned by this function will be output before any result
+ *
+ * @return string
+ */
+ function getPageHeader() {
+ return '';
+ }
+
+ /**
+ * Outputs some kind of an informative message (via OutputPage) to let the
+ * user know that the query returned nothing and thus there's nothing to
+ * show.
+ *
+ * @since 1.26
+ */
+ protected function showEmptyText() {
+ $this->getOutput()->addWikiMsg( 'specialpage-empty' );
+ }
+
+ /**
+ * If using extra form wheely-dealies, return a set of parameters here
+ * as an associative array. They will be encoded and added to the paging
+ * links (prev/next/lengths).
+ *
+ * @return array
+ */
+ function linkParameters() {
+ return [];
+ }
+
+ /**
+ * Some special pages (for example SpecialListusers used to) might not return the
+ * current object formatted, but return the previous one instead.
+ * Setting this to return true will ensure formatResult() is called
+ * one more time to make sure that the very last result is formatted
+ * as well.
+ *
+ * @deprecated since 1.27
+ *
+ * @return bool
+ */
+ function tryLastResult() {
+ return false;
+ }
+
+ /**
+ * Clear the cache and save new results
+ *
+ * @param int|bool $limit Limit for SQL statement
+ * @param bool $ignoreErrors Whether to ignore database errors
+ * @throws DBError|Exception
+ * @return bool|int
+ */
+ public function recache( $limit, $ignoreErrors = true ) {
+ if ( !$this->isCacheable() ) {
+ return 0;
+ }
+
+ $fname = static::class . '::recache';
+ $dbw = wfGetDB( DB_MASTER );
+ if ( !$dbw ) {
+ return false;
+ }
+
+ try {
+ # Do query
+ $res = $this->reallyDoQuery( $limit, false );
+ $num = false;
+ if ( $res ) {
+ $num = $res->numRows();
+ # Fetch results
+ $vals = [];
+ foreach ( $res as $row ) {
+ if ( isset( $row->value ) ) {
+ if ( $this->usesTimestamps() ) {
+ $value = wfTimestamp( TS_UNIX,
+ $row->value );
+ } else {
+ $value = intval( $row->value ); // T16414
+ }
+ } else {
+ $value = 0;
+ }
+
+ $vals[] = [
+ 'qc_type' => $this->getName(),
+ 'qc_namespace' => $row->namespace,
+ 'qc_title' => $row->title,
+ 'qc_value' => $value
+ ];
+ }
+
+ $dbw->doAtomicSection(
+ __METHOD__,
+ function ( IDatabase $dbw, $fname ) use ( $vals ) {
+ # Clear out any old cached data
+ $dbw->delete( 'querycache',
+ [ 'qc_type' => $this->getName() ],
+ $fname
+ );
+ # Save results into the querycache table on the master
+ if ( count( $vals ) ) {
+ $dbw->insert( 'querycache', $vals, $fname );
+ }
+ # Update the querycache_info record for the page
+ $dbw->delete( 'querycache_info',
+ [ 'qci_type' => $this->getName() ],
+ $fname
+ );
+ $dbw->insert( 'querycache_info',
+ [ 'qci_type' => $this->getName(),
+ 'qci_timestamp' => $dbw->timestamp() ],
+ $fname
+ );
+ }
+ );
+ }
+ } catch ( DBError $e ) {
+ if ( !$ignoreErrors ) {
+ throw $e; // report query error
+ }
+ $num = false; // set result to false to indicate error
+ }
+
+ return $num;
+ }
+
+ /**
+ * Get a DB connection to be used for slow recache queries
+ * @return IDatabase
+ */
+ function getRecacheDB() {
+ return wfGetDB( DB_REPLICA, [ $this->getName(), 'QueryPage::recache', 'vslow' ] );
+ }
+
+ /**
+ * Run the query and return the result
+ * @param int|bool $limit Numerical limit or false for no limit
+ * @param int|bool $offset Numerical offset or false for no offset
+ * @return IResultWrapper
+ * @since 1.18
+ */
+ public function reallyDoQuery( $limit, $offset = false ) {
+ $fname = static::class . '::reallyDoQuery';
+ $dbr = $this->getRecacheDB();
+ $query = $this->getQueryInfo();
+ $order = $this->getOrderFields();
+
+ if ( $this->sortDescending() ) {
+ foreach ( $order as &$field ) {
+ $field .= ' DESC';
+ }
+ }
+
+ if ( is_array( $query ) ) {
+ $tables = isset( $query['tables'] ) ? (array)$query['tables'] : [];
+ $fields = isset( $query['fields'] ) ? (array)$query['fields'] : [];
+ $conds = isset( $query['conds'] ) ? (array)$query['conds'] : [];
+ $options = isset( $query['options'] ) ? (array)$query['options'] : [];
+ $join_conds = isset( $query['join_conds'] ) ? (array)$query['join_conds'] : [];
+
+ if ( $order ) {
+ $options['ORDER BY'] = $order;
+ }
+
+ if ( $limit !== false ) {
+ $options['LIMIT'] = intval( $limit );
+ }
+
+ if ( $offset !== false ) {
+ $options['OFFSET'] = intval( $offset );
+ }
+
+ $res = $dbr->select( $tables, $fields, $conds, $fname,
+ $options, $join_conds
+ );
+ } else {
+ // Old-fashioned raw SQL style, deprecated
+ $sql = $this->getSQL();
+ $sql .= ' ORDER BY ' . implode( ', ', $order );
+ $sql = $dbr->limitResult( $sql, $limit, $offset );
+ $res = $dbr->query( $sql, $fname );
+ }
+
+ return $res;
+ }
+
+ /**
+ * Somewhat deprecated, you probably want to be using execute()
+ * @param int|bool $offset
+ * @param int|bool $limit
+ * @return IResultWrapper
+ */
+ public function doQuery( $offset = false, $limit = false ) {
+ if ( $this->isCached() && $this->isCacheable() ) {
+ return $this->fetchFromCache( $limit, $offset );
+ } else {
+ return $this->reallyDoQuery( $limit, $offset );
+ }
+ }
+
+ /**
+ * Fetch the query results from the query cache
+ * @param int|bool $limit Numerical limit or false for no limit
+ * @param int|bool $offset Numerical offset or false for no offset
+ * @return IResultWrapper
+ * @since 1.18
+ */
+ public function fetchFromCache( $limit, $offset = false ) {
+ $dbr = wfGetDB( DB_REPLICA );
+ $options = [];
+
+ if ( $limit !== false ) {
+ $options['LIMIT'] = intval( $limit );
+ }
+
+ if ( $offset !== false ) {
+ $options['OFFSET'] = intval( $offset );
+ }
+
+ $order = $this->getCacheOrderFields();
+ if ( $this->sortDescending() ) {
+ foreach ( $order as &$field ) {
+ $field .= " DESC";
+ }
+ }
+ if ( $order ) {
+ $options['ORDER BY'] = $order;
+ }
+
+ return $dbr->select( 'querycache',
+ [ 'qc_type',
+ 'namespace' => 'qc_namespace',
+ 'title' => 'qc_title',
+ 'value' => 'qc_value' ],
+ [ 'qc_type' => $this->getName() ],
+ __METHOD__,
+ $options
+ );
+ }
+
+ /**
+ * Return the order fields for fetchFromCache. Default is to always use
+ * "ORDER BY value" which was the default prior to this function.
+ * @return array
+ * @since 1.29
+ */
+ function getCacheOrderFields() {
+ return [ 'value' ];
+ }
+
+ public function getCachedTimestamp() {
+ if ( is_null( $this->cachedTimestamp ) ) {
+ $dbr = wfGetDB( DB_REPLICA );
+ $fname = static::class . '::getCachedTimestamp';
+ $this->cachedTimestamp = $dbr->selectField( 'querycache_info', 'qci_timestamp',
+ [ 'qci_type' => $this->getName() ], $fname );
+ }
+ return $this->cachedTimestamp;
+ }
+
+ /**
+ * Returns limit and offset, as returned by $this->getRequest()->getLimitOffset().
+ * Subclasses may override this to further restrict or modify limit and offset.
+ *
+ * @note Restricts the offset parameter, as most query pages have inefficient paging
+ *
+ * Its generally expected that the returned limit will not be 0, and the returned
+ * offset will be less than the max results.
+ *
+ * @since 1.26
+ * @return int[] list( $limit, $offset )
+ */
+ protected function getLimitOffset() {
+ list( $limit, $offset ) = $this->getRequest()->getLimitOffset();
+ if ( $this->getConfig()->get( 'MiserMode' ) ) {
+ $maxResults = $this->getMaxResults();
+ // Can't display more than max results on a page
+ $limit = min( $limit, $maxResults );
+ // Can't skip over more than the end of $maxResults
+ $offset = min( $offset, $maxResults + 1 );
+ }
+ return [ $limit, $offset ];
+ }
+
+ /**
+ * What is limit to fetch from DB
+ *
+ * Used to make it appear the DB stores less results then it actually does
+ * @param int $uiLimit Limit from UI
+ * @param int $uiOffset Offset from UI
+ * @return int Limit to use for DB (not including extra row to see if at end)
+ */
+ protected function getDBLimit( $uiLimit, $uiOffset ) {
+ $maxResults = $this->getMaxResults();
+ if ( $this->getConfig()->get( 'MiserMode' ) ) {
+ $limit = min( $uiLimit + 1, $maxResults - $uiOffset );
+ return max( $limit, 0 );
+ } else {
+ return $uiLimit + 1;
+ }
+ }
+
+ /**
+ * Get max number of results we can return in miser mode.
+ *
+ * Most QueryPage subclasses use inefficient paging, so limit the max amount we return
+ * This matters for uncached query pages that might otherwise accept an offset of 3 million
+ *
+ * @since 1.27
+ * @return int
+ */
+ protected function getMaxResults() {
+ // Max of 10000, unless we store more than 10000 in query cache.
+ return max( $this->getConfig()->get( 'QueryCacheLimit' ), 10000 );
+ }
+
+ /**
+ * This is the actual workhorse. It does everything needed to make a
+ * real, honest-to-gosh query page.
+ * @param string $par
+ */
+ public function execute( $par ) {
+ $user = $this->getUser();
+ if ( !$this->userCanExecute( $user ) ) {
+ $this->displayRestrictionError();
+ return;
+ }
+
+ $this->setHeaders();
+ $this->outputHeader();
+
+ $out = $this->getOutput();
+
+ if ( $this->isCached() && !$this->isCacheable() ) {
+ $out->addWikiMsg( 'querypage-disabled' );
+ return;
+ }
+
+ $out->setSyndicated( $this->isSyndicated() );
+
+ if ( $this->limit == 0 && $this->offset == 0 ) {
+ list( $this->limit, $this->offset ) = $this->getLimitOffset();
+ }
+ $dbLimit = $this->getDBLimit( $this->limit, $this->offset );
+ // @todo Use doQuery()
+ if ( !$this->isCached() ) {
+ # select one extra row for navigation
+ $res = $this->reallyDoQuery( $dbLimit, $this->offset );
+ } else {
+ # Get the cached result, select one extra row for navigation
+ $res = $this->fetchFromCache( $dbLimit, $this->offset );
+ if ( !$this->listoutput ) {
+ # Fetch the timestamp of this update
+ $ts = $this->getCachedTimestamp();
+ $lang = $this->getLanguage();
+ $maxResults = $lang->formatNum( $this->getConfig()->get( 'QueryCacheLimit' ) );
+
+ if ( $ts ) {
+ $updated = $lang->userTimeAndDate( $ts, $user );
+ $updateddate = $lang->userDate( $ts, $user );
+ $updatedtime = $lang->userTime( $ts, $user );
+ $out->addMeta( 'Data-Cache-Time', $ts );
+ $out->addJsConfigVars( 'dataCacheTime', $ts );
+ $out->addWikiMsg( 'perfcachedts', $updated, $updateddate, $updatedtime, $maxResults );
+ } else {
+ $out->addWikiMsg( 'perfcached', $maxResults );
+ }
+
+ # If updates on this page have been disabled, let the user know
+ # that the data set won't be refreshed for now
+ if ( is_array( $this->getConfig()->get( 'DisableQueryPageUpdate' ) )
+ && in_array( $this->getName(), $this->getConfig()->get( 'DisableQueryPageUpdate' ) )
+ ) {
+ $out->wrapWikiMsg(
+ "<div class=\"mw-querypage-no-updates\">\n$1\n</div>",
+ 'querypage-no-updates'
+ );
+ }
+ }
+ }
+
+ $this->numRows = $res->numRows();
+
+ $dbr = $this->getRecacheDB();
+ $this->preprocessResults( $dbr, $res );
+
+ $out->addHTML( Xml::openElement( 'div', [ 'class' => 'mw-spcontent' ] ) );
+
+ # Top header and navigation
+ if ( $this->shownavigation ) {
+ $out->addHTML( $this->getPageHeader() );
+ if ( $this->numRows > 0 ) {
+ $out->addHTML( $this->msg( 'showingresultsinrange' )->numParams(
+ min( $this->numRows, $this->limit ), # do not show the one extra row, if exist
+ $this->offset + 1, ( min( $this->numRows, $this->limit ) + $this->offset ) )->parseAsBlock() );
+ # Disable the "next" link when we reach the end
+ $miserMaxResults = $this->getConfig()->get( 'MiserMode' )
+ && ( $this->offset + $this->limit >= $this->getMaxResults() );
+ $atEnd = ( $this->numRows <= $this->limit ) || $miserMaxResults;
+ $paging = $this->getLanguage()->viewPrevNext( $this->getPageTitle( $par ), $this->offset,
+ $this->limit, $this->linkParameters(), $atEnd );
+ $out->addHTML( '<p>' . $paging . '</p>' );
+ } else {
+ # No results to show, so don't bother with "showing X of Y" etc.
+ # -- just let the user know and give up now
+ $this->showEmptyText();
+ $out->addHTML( Xml::closeElement( 'div' ) );
+ return;
+ }
+ }
+
+ # The actual results; specialist subclasses will want to handle this
+ # with more than a straight list, so we hand them the info, plus
+ # an OutputPage, and let them get on with it
+ $this->outputResults( $out,
+ $this->getSkin(),
+ $dbr, # Should use a ResultWrapper for this
+ $res,
+ min( $this->numRows, $this->limit ), # do not format the one extra row, if exist
+ $this->offset );
+
+ # Repeat the paging links at the bottom
+ if ( $this->shownavigation ) {
+ $out->addHTML( '<p>' . $paging . '</p>' );
+ }
+
+ $out->addHTML( Xml::closeElement( 'div' ) );
+ }
+
+ /**
+ * Format and output report results using the given information plus
+ * OutputPage
+ *
+ * @param OutputPage $out OutputPage to print to
+ * @param Skin $skin User skin to use
+ * @param IDatabase $dbr Database (read) connection to use
+ * @param IResultWrapper $res Result pointer
+ * @param int $num Number of available result rows
+ * @param int $offset Paging offset
+ */
+ protected function outputResults( $out, $skin, $dbr, $res, $num, $offset ) {
+ global $wgContLang;
+
+ if ( $num > 0 ) {
+ $html = [];
+ if ( !$this->listoutput ) {
+ $html[] = $this->openList( $offset );
+ }
+
+ # $res might contain the whole 1,000 rows, so we read up to
+ # $num [should update this to use a Pager]
+ // phpcs:ignore Generic.CodeAnalysis.ForLoopWithTestFunctionCall
+ for ( $i = 0; $i < $num && $row = $res->fetchObject(); $i++ ) {
+ $line = $this->formatResult( $skin, $row );
+ if ( $line ) {
+ $html[] = $this->listoutput
+ ? $line
+ : "<li>{$line}</li>\n";
+ }
+ }
+
+ # Flush the final result
+ if ( $this->tryLastResult() ) {
+ $row = null;
+ $line = $this->formatResult( $skin, $row );
+ if ( $line ) {
+ $html[] = $this->listoutput
+ ? $line
+ : "<li>{$line}</li>\n";
+ }
+ }
+
+ if ( !$this->listoutput ) {
+ $html[] = $this->closeList();
+ }
+
+ $html = $this->listoutput
+ ? $wgContLang->listToText( $html )
+ : implode( '', $html );
+
+ $out->addHTML( $html );
+ }
+ }
+
+ /**
+ * @param int $offset
+ * @return string
+ */
+ function openList( $offset ) {
+ return "\n<ol start='" . ( $offset + 1 ) . "' class='special'>\n";
+ }
+
+ /**
+ * @return string
+ */
+ function closeList() {
+ return "</ol>\n";
+ }
+
+ /**
+ * Do any necessary preprocessing of the result object.
+ * @param IDatabase $db
+ * @param IResultWrapper $res
+ */
+ function preprocessResults( $db, $res ) {
+ }
+
+ /**
+ * Similar to above, but packaging in a syndicated feed instead of a web page
+ * @param string $class
+ * @param int $limit
+ * @return bool
+ */
+ function doFeed( $class = '', $limit = 50 ) {
+ if ( !$this->getConfig()->get( 'Feed' ) ) {
+ $this->getOutput()->addWikiMsg( 'feed-unavailable' );
+ return false;
+ }
+
+ $limit = min( $limit, $this->getConfig()->get( 'FeedLimit' ) );
+
+ $feedClasses = $this->getConfig()->get( 'FeedClasses' );
+ if ( isset( $feedClasses[$class] ) ) {
+ /** @var RSSFeed|AtomFeed $feed */
+ $feed = new $feedClasses[$class](
+ $this->feedTitle(),
+ $this->feedDesc(),
+ $this->feedUrl() );
+ $feed->outHeader();
+
+ $res = $this->reallyDoQuery( $limit, 0 );
+ foreach ( $res as $obj ) {
+ $item = $this->feedResult( $obj );
+ if ( $item ) {
+ $feed->outItem( $item );
+ }
+ }
+
+ $feed->outFooter();
+ return true;
+ } else {
+ return false;
+ }
+ }
+
+ /**
+ * Override for custom handling. If the titles/links are ok, just do
+ * feedItemDesc()
+ * @param object $row
+ * @return FeedItem|null
+ */
+ function feedResult( $row ) {
+ if ( !isset( $row->title ) ) {
+ return null;
+ }
+ $title = Title::makeTitle( intval( $row->namespace ), $row->title );
+ if ( $title ) {
+ $date = isset( $row->timestamp ) ? $row->timestamp : '';
+ $comments = '';
+ if ( $title ) {
+ $talkpage = $title->getTalkPage();
+ $comments = $talkpage->getFullURL();
+ }
+
+ return new FeedItem(
+ $title->getPrefixedText(),
+ $this->feedItemDesc( $row ),
+ $title->getFullURL(),
+ $date,
+ $this->feedItemAuthor( $row ),
+ $comments );
+ } else {
+ return null;
+ }
+ }
+
+ function feedItemDesc( $row ) {
+ return isset( $row->comment ) ? htmlspecialchars( $row->comment ) : '';
+ }
+
+ function feedItemAuthor( $row ) {
+ return isset( $row->user_text ) ? $row->user_text : '';
+ }
+
+ function feedTitle() {
+ $desc = $this->getDescription();
+ $code = $this->getConfig()->get( 'LanguageCode' );
+ $sitename = $this->getConfig()->get( 'Sitename' );
+ return "$sitename - $desc [$code]";
+ }
+
+ function feedDesc() {
+ return $this->msg( 'tagline' )->text();
+ }
+
+ function feedUrl() {
+ return $this->getPageTitle()->getFullURL();
+ }
+
+ /**
+ * Creates a new LinkBatch object, adds all pages from the passed ResultWrapper (MUST include
+ * title and optional the namespace field) and executes the batch. This operation will pre-cache
+ * LinkCache information like page existence and information for stub color and redirect hints.
+ *
+ * @param IResultWrapper $res The ResultWrapper object to process. Needs to include the title
+ * field and namespace field, if the $ns parameter isn't set.
+ * @param null $ns Use this namespace for the given titles in the ResultWrapper object,
+ * instead of the namespace value of $res.
+ */
+ protected function executeLBFromResultWrapper( IResultWrapper $res, $ns = null ) {
+ if ( !$res->numRows() ) {
+ return;
+ }
+
+ $batch = new LinkBatch;
+ foreach ( $res as $row ) {
+ $batch->add( $ns !== null ? $ns : $row->namespace, $row->title );
+ }
+ $batch->execute();
+
+ $res->seek( 0 );
+ }
+}
generated by cgit v1.2.1 (git 2.18.0) at 2024-05-04 22:25:46 +0000