Your IP : 172.71.254.228
<?php
/**
* Displays information about a page.
*
* Copyright © 2011 Alexandre Emsenhuber
*
* 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
*
* @file
* @ingroup Actions
*/
/**
* Displays information about a page.
*
* @ingroup Actions
*/
class InfoAction extends FormlessAction {
/**
* Returns the name of the action this object responds to.
*
* @return string lowercase
*/
public function getName() {
return 'info';
}
/**
* Whether this action can still be executed by a blocked user.
*
* @return bool
*/
public function requiresUnblock() {
return false;
}
/**
* Whether this action requires the wiki not to be locked.
*
* @return bool
*/
public function requiresWrite() {
return false;
}
/**
* Shows page information on GET request.
*
* @return string Page information that will be added to the output
*/
public function onView() {
$content = '';
// Validate revision
$oldid = $this->page->getOldID();
if ( $oldid ) {
$revision = $this->page->getRevisionFetched();
// Revision is missing
if ( $revision === null ) {
return $this->msg( 'missing-revision', $oldid )->parse();
}
// Revision is not current
if ( !$revision->isCurrent() ) {
return $this->msg( 'pageinfo-not-current' )->plain();
}
}
// Page header
if ( !$this->msg( 'pageinfo-header' )->isDisabled() ) {
$content .= $this->msg( 'pageinfo-header' )->parse();
}
// Hide "This page is a member of # hidden categories" explanation
$content .= Html::element( 'style', array(),
'.mw-hiddenCategoriesExplanation { display: none; }' ) . "\n";
// Hide "Templates used on this page" explanation
$content .= Html::element( 'style', array(),
'.mw-templatesUsedExplanation { display: none; }' ) . "\n";
// Get page information
$pageInfo = $this->pageInfo();
// Allow extensions to add additional information
wfRunHooks( 'InfoAction', array( $this->getContext(), &$pageInfo ) );
// Render page information
foreach ( $pageInfo as $header => $infoTable ) {
$content .= $this->makeHeader( $this->msg( "pageinfo-${header}" )->escaped() ) . "\n";
$table = "\n";
foreach ( $infoTable as $infoRow ) {
$name = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->escaped() : $infoRow[0];
$value = ( $infoRow[1] instanceof Message ) ? $infoRow[1]->escaped() : $infoRow[1];
$table = $this->addRow( $table, $name, $value ) . "\n";
}
$content = $this->addTable( $content, $table ) . "\n";
}
// Page footer
if ( !$this->msg( 'pageinfo-footer' )->isDisabled() ) {
$content .= $this->msg( 'pageinfo-footer' )->parse();
}
// Page credits
/*if ( $this->page->exists() ) {
$content .= Html::rawElement( 'div', array( 'id' => 'mw-credits' ), $this->getContributors() );
}*/
return $content;
}
/**
* Creates a header that can be added to the output.
*
* @param $header The header text.
* @return string The HTML.
*/
protected function makeHeader( $header ) {
$spanAttribs = array( 'class' => 'mw-headline', 'id' => Sanitizer::escapeId( $header ) );
return Html::rawElement( 'h2', array(), Html::element( 'span', $spanAttribs, $header ) );
}
/**
* Adds a row to a table that will be added to the content.
*
* @param string $table The table that will be added to the content
* @param string $name The name of the row
* @param string $value The value of the row
* @return string The table with the row added
*/
protected function addRow( $table, $name, $value ) {
return $table . Html::rawElement( 'tr', array(),
Html::rawElement( 'td', array( 'style' => 'vertical-align: top;' ), $name ) .
Html::rawElement( 'td', array(), $value )
);
}
/**
* Adds a table to the content that will be added to the output.
*
* @param string $content The content that will be added to the output
* @param string $table The table
* @return string The content with the table added
*/
protected function addTable( $content, $table ) {
return $content . Html::rawElement( 'table', array( 'class' => 'wikitable mw-page-info' ),
$table );
}
/**
* Returns page information in an easily-manipulated format. Array keys are used so extensions
* may add additional information in arbitrary positions. Array values are arrays with one
* element to be rendered as a header, arrays with two elements to be rendered as a table row.
*
* @return array
*/
protected function pageInfo() {
global $wgContLang, $wgRCMaxAge, $wgMemc, $wgUnwatchedPageThreshold, $wgPageInfoTransclusionLimit;
$user = $this->getUser();
$lang = $this->getLanguage();
$title = $this->getTitle();
$id = $title->getArticleID();
$memcKey = wfMemcKey( 'infoaction', sha1( $title->getPrefixedText() ), $this->page->getLatest() );
$pageCounts = $wgMemc->get( $memcKey );
if ( $pageCounts === false ) {
// Get page information that would be too "expensive" to retrieve by normal means
$pageCounts = self::pageCounts( $title );
$wgMemc->set( $memcKey, $pageCounts );
}
// Get page properties
$dbr = wfGetDB( DB_SLAVE );
$result = $dbr->select(
'page_props',
array( 'pp_propname', 'pp_value' ),
array( 'pp_page' => $id ),
__METHOD__
);
$pageProperties = array();
foreach ( $result as $row ) {
$pageProperties[$row->pp_propname] = $row->pp_value;
}
// Basic information
$pageInfo = array();
$pageInfo['header-basic'] = array();
// Display title
$displayTitle = $title->getPrefixedText();
if ( !empty( $pageProperties['displaytitle'] ) ) {
$displayTitle = $pageProperties['displaytitle'];
}
$pageInfo['header-basic'][] = array(
$this->msg( 'pageinfo-display-title' ), $displayTitle
);
// Is it a redirect? If so, where to?
if ( $title->isRedirect() ) {
$pageInfo['header-basic'][] = array(
$this->msg( 'pageinfo-redirectsto' ),
Linker::link( $this->page->getRedirectTarget() ) .
$this->msg( 'word-separator' )->text() .
$this->msg( 'parentheses', Linker::link(
$this->page->getRedirectTarget(),
$this->msg( 'pageinfo-redirectsto-info' )->escaped(),
array(),
array( 'action' => 'info' )
) )->text()
);
}
// Default sort key
$sortKey = $title->getCategorySortKey();
if ( !empty( $pageProperties['defaultsort'] ) ) {
$sortKey = $pageProperties['defaultsort'];
}
$pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-default-sort' ), $sortKey );
// Page length (in bytes)
$pageInfo['header-basic'][] = array(
$this->msg( 'pageinfo-length' ), $lang->formatNum( $title->getLength() )
);
// Page ID (number not localised, as it's a database ID)
$pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-article-id' ), $id );
// Language in which the page content is (supposed to be) written
$pageLang = $title->getPageLanguage()->getCode();
$pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-language' ),
Language::fetchLanguageName( $pageLang, $lang->getCode() )
. ' ' . $this->msg( 'parentheses', $pageLang ) );
// Search engine status
$pOutput = new ParserOutput();
if ( isset( $pageProperties['noindex'] ) ) {
$pOutput->setIndexPolicy( 'noindex' );
}
// Use robot policy logic
$policy = $this->page->getRobotPolicy( 'view', $pOutput );
$pageInfo['header-basic'][] = array(
$this->msg( 'pageinfo-robot-policy' ), $this->msg( "pageinfo-robot-${policy['index']}" )
);
if ( isset( $pageCounts['views'] ) ) {
// Number of views
$pageInfo['header-basic'][] = array(
$this->msg( 'pageinfo-views' ), $lang->formatNum( $pageCounts['views'] )
);
}
if (
$user->isAllowed( 'unwatchedpages' ) ||
( $wgUnwatchedPageThreshold !== false &&
$pageCounts['watchers'] >= $wgUnwatchedPageThreshold )
) {
// Number of page watchers
$pageInfo['header-basic'][] = array(
$this->msg( 'pageinfo-watchers' ), $lang->formatNum( $pageCounts['watchers'] )
);
} elseif ( $wgUnwatchedPageThreshold !== false ) {
$pageInfo['header-basic'][] = array(
$this->msg( 'pageinfo-watchers' ),
$this->msg( 'pageinfo-few-watchers' )->numParams( $wgUnwatchedPageThreshold )
);
}
// Redirects to this page
$whatLinksHere = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedText() );
$pageInfo['header-basic'][] = array(
Linker::link(
$whatLinksHere,
$this->msg( 'pageinfo-redirects-name' )->escaped(),
array(),
array( 'hidelinks' => 1, 'hidetrans' => 1 )
),
$this->msg( 'pageinfo-redirects-value' )
->numParams( count( $title->getRedirectsHere() ) )
);
// Is it counted as a content page?
if ( $this->page->isCountable() ) {
$pageInfo['header-basic'][] = array(
$this->msg( 'pageinfo-contentpage' ),
$this->msg( 'pageinfo-contentpage-yes' )
);
}
// Subpages of this page, if subpages are enabled for the current NS
if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
$prefixIndex = SpecialPage::getTitleFor( 'Prefixindex', $title->getPrefixedText() . '/' );
$pageInfo['header-basic'][] = array(
Linker::link( $prefixIndex, $this->msg( 'pageinfo-subpages-name' )->escaped() ),
$this->msg( 'pageinfo-subpages-value' )
->numParams(
$pageCounts['subpages']['total'],
$pageCounts['subpages']['redirects'],
$pageCounts['subpages']['nonredirects'] )
);
}
if ( $title->inNamespace( NS_CATEGORY ) ) {
$category = Category::newFromTitle( $title );
$pageInfo['category-info'] = array(
array(
$this->msg( 'pageinfo-category-pages' ),
$lang->formatNum( $category->getPageCount() )
),
array(
$this->msg( 'pageinfo-category-subcats' ),
$lang->formatNum( $category->getSubcatCount() )
),
array(
$this->msg( 'pageinfo-category-files' ),
$lang->formatNum( $category->getFileCount() )
)
);
}
// Page protection
$pageInfo['header-restrictions'] = array();
// Is this page effected by the cascading protection of something which includes it?
if ( $title->isCascadeProtected() ) {
$cascadingFrom = '';
$sources = $title->getCascadeProtectionSources(); // Array deferencing is in PHP 5.4 :(
foreach ( $sources[0] as $sourceTitle ) {
$cascadingFrom .= Html::rawElement( 'li', array(), Linker::linkKnown( $sourceTitle ) );
}
$cascadingFrom = Html::rawElement( 'ul', array(), $cascadingFrom );
$pageInfo['header-restrictions'][] = array(
$this->msg( 'pageinfo-protect-cascading-from' ),
$cascadingFrom
);
}
// Is out protection set to cascade to other pages?
if ( $title->areRestrictionsCascading() ) {
$pageInfo['header-restrictions'][] = array(
$this->msg( 'pageinfo-protect-cascading' ),
$this->msg( 'pageinfo-protect-cascading-yes' )
);
}
// Page protection
foreach ( $title->getRestrictionTypes() as $restrictionType ) {
$protectionLevel = implode( ', ', $title->getRestrictions( $restrictionType ) );
if ( $protectionLevel == '' ) {
// Allow all users
$message = $this->msg( 'protect-default' )->escaped();
} else {
// Administrators only
$message = $this->msg( "protect-level-$protectionLevel" );
if ( $message->isDisabled() ) {
// Require "$1" permission
$message = $this->msg( "protect-fallback", $protectionLevel )->parse();
} else {
$message = $message->escaped();
}
}
$pageInfo['header-restrictions'][] = array(
$this->msg( "restriction-$restrictionType" ), $message
);
}
if ( !$this->page->exists() ) {
return $pageInfo;
}
// Edit history
$pageInfo['header-edits'] = array();
$firstRev = $this->page->getOldestRevision();
$lastRev = $this->page->getRevision();
$batch = new LinkBatch;
if ( $firstRev ) {
$firstRevUser = $firstRev->getUserText( Revision::FOR_THIS_USER );
if ( $firstRevUser !== '' ) {
$batch->add( NS_USER, $firstRevUser );
$batch->add( NS_USER_TALK, $firstRevUser );
}
}
if ( $lastRev ) {
$lastRevUser = $lastRev->getUserText( Revision::FOR_THIS_USER );
if ( $lastRevUser !== '' ) {
$batch->add( NS_USER, $lastRevUser );
$batch->add( NS_USER_TALK, $lastRevUser );
}
}
$batch->execute();
if ( $firstRev ) {
// Page creator
$pageInfo['header-edits'][] = array(
$this->msg( 'pageinfo-firstuser' ),
Linker::revUserTools( $firstRev )
);
// Date of page creation
$pageInfo['header-edits'][] = array(
$this->msg( 'pageinfo-firsttime' ),
Linker::linkKnown(
$title,
$lang->userTimeAndDate( $firstRev->getTimestamp(), $user ),
array(),
array( 'oldid' => $firstRev->getId() )
)
);
}
if ( $lastRev ) {
// Latest editor
$pageInfo['header-edits'][] = array(
$this->msg( 'pageinfo-lastuser' ),
Linker::revUserTools( $lastRev )
);
// Date of latest edit
$pageInfo['header-edits'][] = array(
$this->msg( 'pageinfo-lasttime' ),
Linker::linkKnown(
$title,
$lang->userTimeAndDate( $this->page->getTimestamp(), $user ),
array(),
array( 'oldid' => $this->page->getLatest() )
)
);
}
// Total number of edits
$pageInfo['header-edits'][] = array(
$this->msg( 'pageinfo-edits' ), $lang->formatNum( $pageCounts['edits'] )
);
// Total number of distinct authors
$pageInfo['header-edits'][] = array(
$this->msg( 'pageinfo-authors' ), $lang->formatNum( $pageCounts['authors'] )
);
// Recent number of edits (within past 30 days)
$pageInfo['header-edits'][] = array(
$this->msg( 'pageinfo-recent-edits', $lang->formatDuration( $wgRCMaxAge ) ),
$lang->formatNum( $pageCounts['recent_edits'] )
);
// Recent number of distinct authors
$pageInfo['header-edits'][] = array(
$this->msg( 'pageinfo-recent-authors' ), $lang->formatNum( $pageCounts['recent_authors'] )
);
// Array of MagicWord objects
$magicWords = MagicWord::getDoubleUnderscoreArray();
// Array of magic word IDs
$wordIDs = $magicWords->names;
// Array of IDs => localized magic words
$localizedWords = $wgContLang->getMagicWords();
$listItems = array();
foreach ( $pageProperties as $property => $value ) {
if ( in_array( $property, $wordIDs ) ) {
$listItems[] = Html::element( 'li', array(), $localizedWords[$property][1] );
}
}
$localizedList = Html::rawElement( 'ul', array(), implode( '', $listItems ) );
$hiddenCategories = $this->page->getHiddenCategories();
if (
count( $listItems ) > 0 ||
count( $hiddenCategories ) > 0 ||
$pageCounts['transclusion']['from'] > 0 ||
$pageCounts['transclusion']['to'] > 0
) {
$options = array( 'LIMIT' => $wgPageInfoTransclusionLimit );
$transcludedTemplates = $title->getTemplateLinksFrom( $options );
$transcludedTargets = $title->getTemplateLinksTo( $options );
// Page properties
$pageInfo['header-properties'] = array();
// Magic words
if ( count( $listItems ) > 0 ) {
$pageInfo['header-properties'][] = array(
$this->msg( 'pageinfo-magic-words' )->numParams( count( $listItems ) ),
$localizedList
);
}
// Hidden categories
if ( count( $hiddenCategories ) > 0 ) {
$pageInfo['header-properties'][] = array(
$this->msg( 'pageinfo-hidden-categories' )
->numParams( count( $hiddenCategories ) ),
Linker::formatHiddenCategories( $hiddenCategories )
);
}
// Transcluded templates
if ( $pageCounts['transclusion']['from'] > 0 ) {
if ( $pageCounts['transclusion']['from'] > count( $transcludedTemplates ) ) {
$more = $this->msg( 'morenotlisted' )->escaped();
} else {
$more = null;
}
$pageInfo['header-properties'][] = array(
$this->msg( 'pageinfo-templates' )
->numParams( $pageCounts['transclusion']['from'] ),
Linker::formatTemplates(
$transcludedTemplates,
false,
false,
$more )
);
}
if ( $pageCounts['transclusion']['to'] > 0 ) {
if ( $pageCounts['transclusion']['to'] > count( $transcludedTargets ) ) {
$more = Linker::link(
$whatLinksHere,
$this->msg( 'moredotdotdot' )->escaped(),
array(),
array( 'hidelinks' => 1, 'hideredirs' => 1 )
);
} else {
$more = null;
}
$pageInfo['header-properties'][] = array(
$this->msg( 'pageinfo-transclusions' )
->numParams( $pageCounts['transclusion']['to'] ),
Linker::formatTemplates(
$transcludedTargets,
false,
false,
$more )
);
}
}
return $pageInfo;
}
/**
* Returns page counts that would be too "expensive" to retrieve by normal means.
*
* @param Title $title Title to get counts for
* @return array
*/
protected static function pageCounts( Title $title ) {
global $wgRCMaxAge, $wgDisableCounters;
wfProfileIn( __METHOD__ );
$id = $title->getArticleID();
$dbr = wfGetDB( DB_SLAVE );
$result = array();
if ( !$wgDisableCounters ) {
// Number of views
$views = (int) $dbr->selectField(
'page',
'page_counter',
array( 'page_id' => $id ),
__METHOD__
);
$result['views'] = $views;
}
// Number of page watchers
$watchers = (int) $dbr->selectField(
'watchlist',
'COUNT(*)',
array(
'wl_namespace' => $title->getNamespace(),
'wl_title' => $title->getDBkey(),
),
__METHOD__
);
$result['watchers'] = $watchers;
// Total number of edits
$edits = (int) $dbr->selectField(
'revision',
'COUNT(rev_page)',
array( 'rev_page' => $id ),
__METHOD__
);
$result['edits'] = $edits;
// Total number of distinct authors
$authors = (int) $dbr->selectField(
'revision',
'COUNT(DISTINCT rev_user_text)',
array( 'rev_page' => $id ),
__METHOD__
);
$result['authors'] = $authors;
// "Recent" threshold defined by $wgRCMaxAge
$threshold = $dbr->timestamp( time() - $wgRCMaxAge );
// Recent number of edits
$edits = (int) $dbr->selectField(
'revision',
'COUNT(rev_page)',
array(
'rev_page' => $id,
"rev_timestamp >= " . $dbr->addQuotes( $threshold )
),
__METHOD__
);
$result['recent_edits'] = $edits;
// Recent number of distinct authors
$authors = (int) $dbr->selectField(
'revision',
'COUNT(DISTINCT rev_user_text)',
array(
'rev_page' => $id,
"rev_timestamp >= " . $dbr->addQuotes( $threshold )
),
__METHOD__
);
$result['recent_authors'] = $authors;
// Subpages (if enabled)
if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
$conds = array( 'page_namespace' => $title->getNamespace() );
$conds[] = 'page_title ' . $dbr->buildLike( $title->getDBkey() . '/', $dbr->anyString() );
// Subpages of this page (redirects)
$conds['page_is_redirect'] = 1;
$result['subpages']['redirects'] = (int) $dbr->selectField(
'page',
'COUNT(page_id)',
$conds,
__METHOD__ );
// Subpages of this page (non-redirects)
$conds['page_is_redirect'] = 0;
$result['subpages']['nonredirects'] = (int) $dbr->selectField(
'page',
'COUNT(page_id)',
$conds,
__METHOD__
);
// Subpages of this page (total)
$result['subpages']['total'] = $result['subpages']['redirects']
+ $result['subpages']['nonredirects'];
}
// Counts for the number of transclusion links (to/from)
$result['transclusion']['to'] = (int) $dbr->selectField(
'templatelinks',
'COUNT(tl_from)',
array(
'tl_namespace' => $title->getNamespace(),
'tl_title' => $title->getDBkey()
),
__METHOD__
);
$result['transclusion']['from'] = (int) $dbr->selectField(
'templatelinks',
'COUNT(*)',
array( 'tl_from' => $title->getArticleID() ),
__METHOD__
);
wfProfileOut( __METHOD__ );
return $result;
}
/**
* Returns the name that goes in the "<h1>" page title.
*
* @return string
*/
protected function getPageTitle() {
return $this->msg( 'pageinfo-title', $this->getTitle()->getPrefixedText() )->text();
}
/**
* Get a list of contributors of $article
* @return string: html
*/
protected function getContributors() {
global $wgHiddenPrefs;
$contributors = $this->page->getContributors();
$real_names = array();
$user_names = array();
$anon_ips = array();
# Sift for real versus user names
foreach ( $contributors as $user ) {
$page = $user->isAnon()
? SpecialPage::getTitleFor( 'Contributions', $user->getName() )
: $user->getUserPage();
if ( $user->getID() == 0 ) {
$anon_ips[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
} elseif ( !in_array( 'realname', $wgHiddenPrefs ) && $user->getRealName() ) {
$real_names[] = Linker::link( $page, htmlspecialchars( $user->getRealName() ) );
} else {
$user_names[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
}
}
$lang = $this->getLanguage();
$real = $lang->listToText( $real_names );
# "ThisSite user(s) A, B and C"
if ( count( $user_names ) ) {
$user = $this->msg( 'siteusers' )->rawParams( $lang->listToText( $user_names ) )->params(
count( $user_names ) )->escaped();
} else {
$user = false;
}
if ( count( $anon_ips ) ) {
$anon = $this->msg( 'anonusers' )->rawParams( $lang->listToText( $anon_ips ) )->params(
count( $anon_ips ) )->escaped();
} else {
$anon = false;
}
# This is the big list, all mooshed together. We sift for blank strings
$fulllist = array();
foreach ( array( $real, $user, $anon ) as $s ) {
if ( $s !== '' ) {
array_push( $fulllist, $s );
}
}
$count = count( $fulllist );
# "Based on work by ..."
return $count
? $this->msg( 'othercontribs' )->rawParams(
$lang->listToText( $fulllist ) )->params( $count )->escaped()
: '';
}
/**
* Returns the description that goes below the "<h1>" tag.
*
* @return string
*/
protected function getDescription() {
return '';
}
}