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<?php
/**
* Contain a class for special pages
* @file
* @ingroup SpecialPages
*/
/**
* 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.
*/
global $wgQueryPages; // not redundant
$wgQueryPages = array(
// QueryPage subclass Special page name Limit (false for none, none for the default)
//----------------------------------------------------------------------------
array( 'AncientPagesPage', 'Ancientpages' ),
array( 'BrokenRedirectsPage', 'BrokenRedirects' ),
array( 'DeadendPagesPage', 'Deadendpages' ),
array( 'DisambiguationsPage', 'Disambiguations' ),
array( 'DoubleRedirectsPage', 'DoubleRedirects' ),
array( 'LinkSearchPage', 'LinkSearch' ),
array( 'ListredirectsPage', 'Listredirects' ),
array( 'LonelyPagesPage', 'Lonelypages' ),
array( 'LongPagesPage', 'Longpages' ),
array( 'MostcategoriesPage', 'Mostcategories' ),
array( 'MostimagesPage', 'Mostimages' ),
array( 'MostlinkedCategoriesPage', 'Mostlinkedcategories' ),
array( 'SpecialMostlinkedtemplates', 'Mostlinkedtemplates' ),
array( 'MostlinkedPage', 'Mostlinked' ),
array( 'MostrevisionsPage', 'Mostrevisions' ),
array( 'FewestrevisionsPage', 'Fewestrevisions' ),
array( 'ShortPagesPage', 'Shortpages' ),
array( 'UncategorizedCategoriesPage', 'Uncategorizedcategories' ),
array( 'UncategorizedPagesPage', 'Uncategorizedpages' ),
array( 'UncategorizedImagesPage', 'Uncategorizedimages' ),
array( 'UncategorizedTemplatesPage', 'Uncategorizedtemplates' ),
array( 'UnusedCategoriesPage', 'Unusedcategories' ),
array( 'UnusedimagesPage', 'Unusedimages' ),
array( 'WantedCategoriesPage', 'Wantedcategories' ),
array( 'WantedFilesPage', 'Wantedfiles' ),
array( 'WantedPagesPage', 'Wantedpages' ),
array( 'WantedTemplatesPage', 'Wantedtemplates' ),
array( 'UnwatchedPagesPage', 'Unwatchedpages' ),
array( 'UnusedtemplatesPage', 'Unusedtemplates' ),
array( 'WithoutInterwikiPage', 'Withoutinterwiki' ),
);
wfRunHooks( 'wgQueryPages', array( &$wgQueryPages ) );
global $wgDisableCounters;
if ( !$wgDisableCounters )
$wgQueryPages[] = array( 'PopularPagesPage', 'Popularpages' );
/**
* 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
*/
class QueryPage {
/**
* Whether or not we want plain listoutput rather than an ordered list
*
* @var bool
*/
var $listoutput = false;
/**
* The offset and limit in use, as passed to the query() function
*
* @var integer
*/
var $offset = 0;
var $limit = 0;
/**
* A mutator for $this->listoutput;
*
* @param bool $bool
*/
function setListoutput( $bool ) {
$this->listoutput = $bool;
}
/**
* Subclasses return their name here. Make sure the name is also
* specified in SpecialPage.php and in Language.php as a language message
* param.
*/
function getName() {
return '';
}
/**
* Return title object representing this page
*
* @return Title
*/
function getTitle() {
return SpecialPage::getTitleFor( $this->getName() );
}
/**
* Subclasses return an SQL query here.
*
* Note that the query itself should return the following four columns:
* 'type' (your special page's name), 'namespace', 'title', and 'value'
* *in that order*. 'value' is used for sorting.
*
* These may be stored in the querycache table for expensive queries,
* and that cached data will be returned sometimes, so the presence of
* extra fields can't be relied upon. The cached 'value' column will be
* an integer; non-numeric values are useful only for sorting the initial
* query.
*
* Don't include an ORDER or LIMIT clause, this will be added.
*/
function getSQL() {
return "SELECT 'sample' as type, 0 as namespace, 'Sample result' as title, 42 as value";
}
/**
* Override to sort by increasing values
*/
function sortDescending() {
return true;
}
function getOrder() {
return ' ORDER BY value ' .
($this->sortDescending() ? 'DESC' : '');
}
/**
* 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.
*/
function isExpensive( ) {
global $wgDisableQueryPages;
return $wgDisableQueryPages;
}
/**
* Whether or not the output of the page in question is retrived from
* the database cache.
*
* @return bool
*/
function isCached() {
global $wgMiserMode;
return $this->isExpensive() && $wgMiserMode;
}
/**
* Sometime we dont want to build rss / atom feeds.
*/
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 return "false", the line output will be skipped.
*/
function formatResult( $skin, $result ) {
return '';
}
/**
* The content returned by this function will be output before any result
*/
function getPageHeader( ) {
return '';
}
/**
* 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 array();
}
/**
* Some special pages (for example SpecialListusers) might not return the
* current object formatted, but return the previous one instead.
* Setting this to return true, will call one more time wfFormatResult to
* be sure that the very last result is formatted and shown.
*/
function tryLastResult( ) {
return false;
}
/**
* Clear the cache and save new results
*/
function recache( $limit, $ignoreErrors = true ) {
$fname = get_class($this) . '::recache';
$dbw = wfGetDB( DB_MASTER );
$dbr = wfGetDB( DB_SLAVE, array( $this->getName(), 'QueryPage::recache', 'vslow' ) );
if ( !$dbw || !$dbr ) {
return false;
}
$querycache = $dbr->tableName( 'querycache' );
if ( $ignoreErrors ) {
$ignoreW = $dbw->ignoreErrors( true );
$ignoreR = $dbr->ignoreErrors( true );
}
# Clear out any old cached data
$dbw->delete( 'querycache', array( 'qc_type' => $this->getName() ), $fname );
# Do query
$sql = $this->getSQL() . $this->getOrder();
if ($limit !== false)
$sql = $dbr->limitResult($sql, $limit, 0);
$res = $dbr->query($sql, $fname);
$num = false;
if ( $res ) {
$num = $dbr->numRows( $res );
# Fetch results
$insertSql = "INSERT INTO $querycache (qc_type,qc_namespace,qc_title,qc_value) VALUES ";
$first = true;
while ( $res && $row = $dbr->fetchObject( $res ) ) {
if ( $first ) {
$first = false;
} else {
$insertSql .= ',';
}
if ( isset( $row->value ) ) {
$value = $row->value;
} else {
$value = 0;
}
$insertSql .= '(' .
$dbw->addQuotes( $row->type ) . ',' .
$dbw->addQuotes( $row->namespace ) . ',' .
$dbw->addQuotes( $row->title ) . ',' .
$dbw->addQuotes( $value ) . ')';
}
# Save results into the querycache table on the master
if ( !$first ) {
if ( !$dbw->query( $insertSql, $fname ) ) {
// Set result to false to indicate error
$dbr->freeResult( $res );
$res = false;
}
}
if ( $res ) {
$dbr->freeResult( $res );
}
if ( $ignoreErrors ) {
$dbw->ignoreErrors( $ignoreW );
$dbr->ignoreErrors( $ignoreR );
}
# Update the querycache_info record for the page
$dbw->delete( 'querycache_info', array( 'qci_type' => $this->getName() ), $fname );
$dbw->insert( 'querycache_info', array( 'qci_type' => $this->getName(), 'qci_timestamp' => $dbw->timestamp() ), $fname );
}
return $num;
}
/**
* This is the actual workhorse. It does everything needed to make a
* real, honest-to-gosh query page.
*
* @param $offset database query offset
* @param $limit database query limit
* @param $shownavigation show navigation like "next 200"?
*/
function doQuery( $offset, $limit, $shownavigation=true ) {
global $wgUser, $wgOut, $wgLang, $wgContLang;
$this->offset = $offset;
$this->limit = $limit;
$sname = $this->getName();
$fname = get_class($this) . '::doQuery';
$dbr = wfGetDB( DB_SLAVE );
$wgOut->setSyndicated( $this->isSyndicated() );
if ( !$this->isCached() ) {
$sql = $this->getSQL();
} else {
# Get the cached result
$querycache = $dbr->tableName( 'querycache' );
$type = $dbr->strencode( $sname );
$sql =
"SELECT qc_type as type, qc_namespace as namespace,qc_title as title, qc_value as value
FROM $querycache WHERE qc_type='$type'";
if( !$this->listoutput ) {
# Fetch the timestamp of this update
$tRes = $dbr->select( 'querycache_info', array( 'qci_timestamp' ), array( 'qci_type' => $type ), $fname );
$tRow = $dbr->fetchObject( $tRes );
if( $tRow ) {
$updated = $wgLang->timeAndDate( $tRow->qci_timestamp, true, true );
$wgOut->addMeta( 'Data-Cache-Time', $tRow->qci_timestamp );
$wgOut->addInlineScript( "var dataCacheTime = '{$tRow->qci_timestamp}';" );
$wgOut->addWikiMsg( 'perfcachedts', $updated );
} else {
$wgOut->addWikiMsg( 'perfcached' );
}
# If updates on this page have been disabled, let the user know
# that the data set won't be refreshed for now
global $wgDisableQueryPageUpdate;
if( is_array( $wgDisableQueryPageUpdate ) && in_array( $this->getName(), $wgDisableQueryPageUpdate ) ) {
$wgOut->addWikiMsg( 'querypage-no-updates' );
}
}
}
$sql .= $this->getOrder();
$sql = $dbr->limitResult($sql, $limit, $offset);
$res = $dbr->query( $sql );
$num = $dbr->numRows($res);
$this->preprocessResults( $dbr, $res );
$wgOut->addHTML( XML::openElement( 'div', array('class' => 'mw-spcontent') ) );
# Top header and navigation
if( $shownavigation ) {
$wgOut->addHTML( $this->getPageHeader() );
if( $num > 0 ) {
$wgOut->addHTML( '<p>' . wfShowingResults( $offset, $num ) . '</p>' );
# Disable the "next" link when we reach the end
$paging = wfViewPrevNext( $offset, $limit, $wgContLang->specialPage( $sname ),
wfArrayToCGI( $this->linkParameters() ), ( $num < $limit ) );
$wgOut->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
$wgOut->addHTML( '<p>' . wfMsgHtml( 'specialpage-empty' ) . '</p>' );
$wgOut->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( $wgOut,
$wgUser->getSkin(),
$dbr, # Should use a ResultWrapper for this
$res,
$dbr->numRows( $res ),
$offset );
# Repeat the paging links at the bottom
if( $shownavigation ) {
$wgOut->addHTML( '<p>' . $paging . '</p>' );
}
$wgOut->addHTML( XML::closeElement( 'div' ) );
return $num;
}
/**
* 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 Database $dbr Database (read) connection to use
* @param int $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 ) {
$html = array();
if( !$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]
for( $i = 0; $i < $num && $row = $dbr->fetchObject( $res ); $i++ ) {
$line = $this->formatResult( $skin, $row );
if( $line ) {
$attr = ( isset( $row->usepatrol ) && $row->usepatrol && $row->patrolled == 0 )
? ' class="not-patrolled"'
: '';
$html[] = $this->listoutput
? $line
: "<li{$attr}>{$line}</li>\n";
}
}
# Flush the final result
if( $this->tryLastResult() ) {
$row = null;
$line = $this->formatResult( $skin, $row );
if( $line ) {
$attr = ( isset( $row->usepatrol ) && $row->usepatrol && $row->patrolled == 0 )
? ' class="not-patrolled"'
: '';
$html[] = $this->listoutput
? $line
: "<li{$attr}>{$line}</li>\n";
}
}
if( !$this->listoutput )
$html[] = $this->closeList();
$html = $this->listoutput
? $wgContLang->listToText( $html )
: implode( '', $html );
$out->addHTML( $html );
}
}
function openList( $offset ) {
return "\n<ol start='" . ( $offset + 1 ) . "' class='special'>\n";
}
function closeList() {
return "</ol>\n";
}
/**
* Do any necessary preprocessing of the result object.
*/
function preprocessResults( $db, $res ) {}
/**
* Similar to above, but packaging in a syndicated feed instead of a web page
*/
function doFeed( $class = '', $limit = 50 ) {
global $wgFeed, $wgFeedClasses;
if ( !$wgFeed ) {
global $wgOut;
$wgOut->addWikiMsg( 'feed-unavailable' );
return;
}
global $wgFeedLimit;
if( $limit > $wgFeedLimit ) {
$limit = $wgFeedLimit;
}
if( isset($wgFeedClasses[$class]) ) {
$feed = new $wgFeedClasses[$class](
$this->feedTitle(),
$this->feedDesc(),
$this->feedUrl() );
$feed->outHeader();
$dbr = wfGetDB( DB_SLAVE );
$sql = $this->getSQL() . $this->getOrder();
$sql = $dbr->limitResult( $sql, $limit, 0 );
$res = $dbr->query( $sql, 'QueryPage::doFeed' );
while( $obj = $dbr->fetchObject( $res ) ) {
$item = $this->feedResult( $obj );
if( $item ) $feed->outItem( $item );
}
$dbr->freeResult( $res );
$feed->outFooter();
return true;
} else {
return false;
}
}
/**
* Override for custom handling. If the titles/links are ok, just do
* feedItemDesc()
*/
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() {
global $wgContLanguageCode, $wgSitename;
$page = SpecialPage::getPage( $this->getName() );
$desc = $page->getDescription();
return "$wgSitename - $desc [$wgContLanguageCode]";
}
function feedDesc() {
return wfMsgExt( 'tagline', 'parsemag' );
}
function feedUrl() {
$title = SpecialPage::getTitleFor( $this->getName() );
return $title->getFullURL();
}
}
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