Current File : //data/www_bck/varak.net_bck/havranipapuce.varak.net/includes/deferred/LinksUpdate.php
<?php
/**
* Updater for link tracking tables after a page edit.
*
* 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
*/
/**
* See docs/deferred.txt
*
* @todo document (e.g. one-sentence top-level class description).
*/
class LinksUpdate extends SqlDataUpdate {
// @todo make members protected, but make sure extensions don't break
/** @var int Page ID of the article linked from */
public $mId;
/** @var Title Title object of the article linked from */
public $mTitle;
/** @var ParserOutput */
public $mParserOutput;
/** @var array Map of title strings to IDs for the links in the document */
public $mLinks;
/** @var array DB keys of the images used, in the array key only */
public $mImages;
/** @var array Map of title strings to IDs for the template references, including broken ones */
public $mTemplates;
/** @var array URLs of external links, array key only */
public $mExternals;
/** @var array Map of category names to sort keys */
public $mCategories;
/** @var array Map of language codes to titles */
public $mInterlangs;
/** @var array Map of arbitrary name to value */
public $mProperties;
/** @var bool Whether to queue jobs for recursive updates */
public $mRecursive;
/**
* @var null|array Added links if calculated.
*/
private $linkInsertions = null;
/**
* @var null|array Deleted links if calculated.
*/
private $linkDeletions = null;
/**
* Constructor
*
* @param Title $title Title of the page we're updating
* @param ParserOutput $parserOutput Output from a full parse of this page
* @param bool $recursive Queue jobs for recursive updates?
* @throws MWException
*/
function __construct( $title, $parserOutput, $recursive = true ) {
parent::__construct( false ); // no implicit transaction
if ( !( $title instanceof Title ) ) {
throw new MWException( "The calling convention to LinksUpdate::LinksUpdate() has changed. " .
"Please see Article::editUpdates() for an invocation example.\n" );
}
if ( !( $parserOutput instanceof ParserOutput ) ) {
throw new MWException( "The calling convention to LinksUpdate::__construct() has changed. " .
"Please see WikiPage::doEditUpdates() for an invocation example.\n" );
}
$this->mTitle = $title;
$this->mId = $title->getArticleID();
if ( !$this->mId ) {
throw new MWException( "The Title object did not provide an article " .
"ID. Perhaps the page doesn't exist?" );
}
$this->mParserOutput = $parserOutput;
$this->mLinks = $parserOutput->getLinks();
$this->mImages = $parserOutput->getImages();
$this->mTemplates = $parserOutput->getTemplates();
$this->mExternals = $parserOutput->getExternalLinks();
$this->mCategories = $parserOutput->getCategories();
$this->mProperties = $parserOutput->getProperties();
$this->mInterwikis = $parserOutput->getInterwikiLinks();
# Convert the format of the interlanguage links
# I didn't want to change it in the ParserOutput, because that array is passed all
# the way back to the skin, so either a skin API break would be required, or an
# inefficient back-conversion.
$ill = $parserOutput->getLanguageLinks();
$this->mInterlangs = array();
foreach ( $ill as $link ) {
list( $key, $title ) = explode( ':', $link, 2 );
$this->mInterlangs[$key] = $title;
}
foreach ( $this->mCategories as &$sortkey ) {
# If the sortkey is longer then 255 bytes,
# it truncated by DB, and then doesn't get
# matched when comparing existing vs current
# categories, causing bug 25254.
# Also. substr behaves weird when given "".
if ( $sortkey !== '' ) {
$sortkey = substr( $sortkey, 0, 255 );
}
}
$this->mRecursive = $recursive;
Hooks::run( 'LinksUpdateConstructed', array( &$this ) );
}
/**
* Update link tables with outgoing links from an updated article
*/
public function doUpdate() {
Hooks::run( 'LinksUpdate', array( &$this ) );
$this->doIncrementalUpdate();
Hooks::run( 'LinksUpdateComplete', array( &$this ) );
}
protected function doIncrementalUpdate() {
# Page links
$existing = $this->getExistingLinks();
$this->linkDeletions = $this->getLinkDeletions( $existing );
$this->linkInsertions = $this->getLinkInsertions( $existing );
$this->incrTableUpdate( 'pagelinks', 'pl', $this->linkDeletions, $this->linkInsertions );
# Image links
$existing = $this->getExistingImages();
$imageDeletes = $this->getImageDeletions( $existing );
$this->incrTableUpdate( 'imagelinks', 'il', $imageDeletes,
$this->getImageInsertions( $existing ) );
# Invalidate all image description pages which had links added or removed
$imageUpdates = $imageDeletes + array_diff_key( $this->mImages, $existing );
$this->invalidateImageDescriptions( $imageUpdates );
# External links
$existing = $this->getExistingExternals();
$this->incrTableUpdate( 'externallinks', 'el', $this->getExternalDeletions( $existing ),
$this->getExternalInsertions( $existing ) );
# Language links
$existing = $this->getExistingInterlangs();
$this->incrTableUpdate( 'langlinks', 'll', $this->getInterlangDeletions( $existing ),
$this->getInterlangInsertions( $existing ) );
# Inline interwiki links
$existing = $this->getExistingInterwikis();
$this->incrTableUpdate( 'iwlinks', 'iwl', $this->getInterwikiDeletions( $existing ),
$this->getInterwikiInsertions( $existing ) );
# Template links
$existing = $this->getExistingTemplates();
$this->incrTableUpdate( 'templatelinks', 'tl', $this->getTemplateDeletions( $existing ),
$this->getTemplateInsertions( $existing ) );
# Category links
$existing = $this->getExistingCategories();
$categoryDeletes = $this->getCategoryDeletions( $existing );
$this->incrTableUpdate( 'categorylinks', 'cl', $categoryDeletes,
$this->getCategoryInsertions( $existing ) );
# Invalidate all categories which were added, deleted or changed (set symmetric difference)
$categoryInserts = array_diff_assoc( $this->mCategories, $existing );
$categoryUpdates = $categoryInserts + $categoryDeletes;
$this->invalidateCategories( $categoryUpdates );
$this->updateCategoryCounts( $categoryInserts, $categoryDeletes );
# Page properties
$existing = $this->getExistingProperties();
$propertiesDeletes = $this->getPropertyDeletions( $existing );
$this->incrTableUpdate( 'page_props', 'pp', $propertiesDeletes,
$this->getPropertyInsertions( $existing ) );
# Invalidate the necessary pages
$changed = $propertiesDeletes + array_diff_assoc( $this->mProperties, $existing );
$this->invalidateProperties( $changed );
# Update the links table freshness for this title
$this->updateLinksTimestamp();
# Refresh links of all pages including this page
# This will be in a separate transaction
if ( $this->mRecursive ) {
$this->queueRecursiveJobs();
}
}
/**
* Queue recursive jobs for this page
*
* Which means do LinksUpdate on all pages that include the current page,
* using the job queue.
*/
protected function queueRecursiveJobs() {
self::queueRecursiveJobsForTable( $this->mTitle, 'templatelinks' );
if ( $this->mTitle->getNamespace() == NS_FILE ) {
// Process imagelinks in case the title is or was a redirect
self::queueRecursiveJobsForTable( $this->mTitle, 'imagelinks' );
}
$bc = $this->mTitle->getBacklinkCache();
// Get jobs for cascade-protected backlinks for a high priority queue.
// If meta-templates change to using a new template, the new template
// should be implicitly protected as soon as possible, if applicable.
// These jobs duplicate a subset of the above ones, but can run sooner.
// Which ever runs first generally no-ops the other one.
$jobs = array();
foreach ( $bc->getCascadeProtectedLinks() as $title ) {
$jobs[] = new RefreshLinksJob( $title, array( 'prioritize' => true ) );
}
JobQueueGroup::singleton()->push( $jobs );
}
/**
* Queue a RefreshLinks job for any table.
*
* @param Title $title Title to do job for
* @param string $table Table to use (e.g. 'templatelinks')
*/
public static function queueRecursiveJobsForTable( Title $title, $table ) {
if ( $title->getBacklinkCache()->hasLinks( $table ) ) {
$job = new RefreshLinksJob(
$title,
array(
'table' => $table,
'recursive' => true,
) + Job::newRootJobParams( // "overall" refresh links job info
"refreshlinks:{$table}:{$title->getPrefixedText()}"
)
);
JobQueueGroup::singleton()->push( $job );
JobQueueGroup::singleton()->deduplicateRootJob( $job );
}
}
/**
* @param array $cats
*/
function invalidateCategories( $cats ) {
$this->invalidatePages( NS_CATEGORY, array_keys( $cats ) );
}
/**
* Update all the appropriate counts in the category table.
* @param array $added Associative array of category name => sort key
* @param array $deleted Associative array of category name => sort key
*/
function updateCategoryCounts( $added, $deleted ) {
$a = WikiPage::factory( $this->mTitle );
$a->updateCategoryCounts(
array_keys( $added ), array_keys( $deleted )
);
}
/**
* @param array $images
*/
function invalidateImageDescriptions( $images ) {
$this->invalidatePages( NS_FILE, array_keys( $images ) );
}
/**
* Update a table by doing a delete query then an insert query
* @param string $table Table name
* @param string $prefix Field name prefix
* @param array $deletions
* @param array $insertions Rows to insert
*/
function incrTableUpdate( $table, $prefix, $deletions, $insertions ) {
if ( $table == 'page_props' ) {
$fromField = 'pp_page';
} else {
$fromField = "{$prefix}_from";
}
$where = array( $fromField => $this->mId );
if ( $table == 'pagelinks' || $table == 'templatelinks' || $table == 'iwlinks' ) {
if ( $table == 'iwlinks' ) {
$baseKey = 'iwl_prefix';
} else {
$baseKey = "{$prefix}_namespace";
}
$clause = $this->mDb->makeWhereFrom2d( $deletions, $baseKey, "{$prefix}_title" );
if ( $clause ) {
$where[] = $clause;
} else {
$where = false;
}
} else {
if ( $table == 'langlinks' ) {
$toField = 'll_lang';
} elseif ( $table == 'page_props' ) {
$toField = 'pp_propname';
} else {
$toField = $prefix . '_to';
}
if ( count( $deletions ) ) {
$where[$toField] = array_keys( $deletions );
} else {
$where = false;
}
}
if ( $where ) {
$this->mDb->delete( $table, $where, __METHOD__ );
}
if ( count( $insertions ) ) {
$this->mDb->insert( $table, $insertions, __METHOD__, 'IGNORE' );
Hooks::run( 'LinksUpdateAfterInsert', array( $this, $table, $insertions ) );
}
}
/**
* Get an array of pagelinks insertions for passing to the DB
* Skips the titles specified by the 2-D array $existing
* @param array $existing
* @return array
*/
private function getLinkInsertions( $existing = array() ) {
$arr = array();
foreach ( $this->mLinks as $ns => $dbkeys ) {
$diffs = isset( $existing[$ns] )
? array_diff_key( $dbkeys, $existing[$ns] )
: $dbkeys;
foreach ( $diffs as $dbk => $id ) {
$arr[] = array(
'pl_from' => $this->mId,
'pl_from_namespace' => $this->mTitle->getNamespace(),
'pl_namespace' => $ns,
'pl_title' => $dbk
);
}
}
return $arr;
}
/**
* Get an array of template insertions. Like getLinkInsertions()
* @param array $existing
* @return array
*/
private function getTemplateInsertions( $existing = array() ) {
$arr = array();
foreach ( $this->mTemplates as $ns => $dbkeys ) {
$diffs = isset( $existing[$ns] ) ? array_diff_key( $dbkeys, $existing[$ns] ) : $dbkeys;
foreach ( $diffs as $dbk => $id ) {
$arr[] = array(
'tl_from' => $this->mId,
'tl_from_namespace' => $this->mTitle->getNamespace(),
'tl_namespace' => $ns,
'tl_title' => $dbk
);
}
}
return $arr;
}
/**
* Get an array of image insertions
* Skips the names specified in $existing
* @param array $existing
* @return array
*/
private function getImageInsertions( $existing = array() ) {
$arr = array();
$diffs = array_diff_key( $this->mImages, $existing );
foreach ( $diffs as $iname => $dummy ) {
$arr[] = array(
'il_from' => $this->mId,
'il_from_namespace' => $this->mTitle->getNamespace(),
'il_to' => $iname
);
}
return $arr;
}
/**
* Get an array of externallinks insertions. Skips the names specified in $existing
* @param array $existing
* @return array
*/
private function getExternalInsertions( $existing = array() ) {
$arr = array();
$diffs = array_diff_key( $this->mExternals, $existing );
foreach ( $diffs as $url => $dummy ) {
foreach ( wfMakeUrlIndexes( $url ) as $index ) {
$arr[] = array(
'el_id' => $this->mDb->nextSequenceValue( 'externallinks_el_id_seq' ),
'el_from' => $this->mId,
'el_to' => $url,
'el_index' => $index,
);
}
}
return $arr;
}
/**
* Get an array of category insertions
*
* @param array $existing Mapping existing category names to sort keys. If both
* match a link in $this, the link will be omitted from the output
*
* @return array
*/
private function getCategoryInsertions( $existing = array() ) {
global $wgContLang, $wgCategoryCollation;
$diffs = array_diff_assoc( $this->mCategories, $existing );
$arr = array();
foreach ( $diffs as $name => $prefix ) {
$nt = Title::makeTitleSafe( NS_CATEGORY, $name );
$wgContLang->findVariantLink( $name, $nt, true );
if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
$type = 'subcat';
} elseif ( $this->mTitle->getNamespace() == NS_FILE ) {
$type = 'file';
} else {
$type = 'page';
}
# Treat custom sortkeys as a prefix, so that if multiple
# things are forced to sort as '*' or something, they'll
# sort properly in the category rather than in page_id
# order or such.
$sortkey = Collation::singleton()->getSortKey(
$this->mTitle->getCategorySortkey( $prefix ) );
$arr[] = array(
'cl_from' => $this->mId,
'cl_to' => $name,
'cl_sortkey' => $sortkey,
'cl_timestamp' => $this->mDb->timestamp(),
'cl_sortkey_prefix' => $prefix,
'cl_collation' => $wgCategoryCollation,
'cl_type' => $type,
);
}
return $arr;
}
/**
* Get an array of interlanguage link insertions
*
* @param array $existing Mapping existing language codes to titles
*
* @return array
*/
private function getInterlangInsertions( $existing = array() ) {
$diffs = array_diff_assoc( $this->mInterlangs, $existing );
$arr = array();
foreach ( $diffs as $lang => $title ) {
$arr[] = array(
'll_from' => $this->mId,
'll_lang' => $lang,
'll_title' => $title
);
}
return $arr;
}
/**
* Get an array of page property insertions
* @param array $existing
* @return array
*/
function getPropertyInsertions( $existing = array() ) {
$diffs = array_diff_assoc( $this->mProperties, $existing );
$arr = array();
foreach ( array_keys( $diffs ) as $name ) {
$arr[] = $this->getPagePropRowData( $name );
}
return $arr;
}
/**
* Returns an associative array to be used for inserting a row into
* the page_props table. Besides the given property name, this will
* include the page id from $this->mId and any property value from
* $this->mProperties.
*
* The array returned will include the pp_sortkey field if this
* is present in the database (as indicated by $wgPagePropsHaveSortkey).
* The sortkey value is currently determined by getPropertySortKeyValue().
*
* @note this assumes that $this->mProperties[$prop] is defined.
*
* @param string $prop The name of the property.
*
* @return array
*/
private function getPagePropRowData( $prop ) {
global $wgPagePropsHaveSortkey;
$value = $this->mProperties[$prop];
$row = array(
'pp_page' => $this->mId,
'pp_propname' => $prop,
'pp_value' => $value,
);
if ( $wgPagePropsHaveSortkey ) {
$row['pp_sortkey'] = $this->getPropertySortKeyValue( $value );
}
return $row;
}
/**
* Determines the sort key for the given property value.
* This will return $value if it is a float or int,
* 1 or resp. 0 if it is a bool, and null otherwise.
*
* @note In the future, we may allow the sortkey to be specified explicitly
* in ParserOutput::setProperty.
*
* @param mixed $value
*
* @return float|null
*/
private function getPropertySortKeyValue( $value ) {
if ( is_int( $value ) || is_float( $value ) || is_bool( $value ) ) {
return floatval( $value );
}
return null;
}
/**
* Get an array of interwiki insertions for passing to the DB
* Skips the titles specified by the 2-D array $existing
* @param array $existing
* @return array
*/
private function getInterwikiInsertions( $existing = array() ) {
$arr = array();
foreach ( $this->mInterwikis as $prefix => $dbkeys ) {
$diffs = isset( $existing[$prefix] )
? array_diff_key( $dbkeys, $existing[$prefix] )
: $dbkeys;
foreach ( $diffs as $dbk => $id ) {
$arr[] = array(
'iwl_from' => $this->mId,
'iwl_prefix' => $prefix,
'iwl_title' => $dbk
);
}
}
return $arr;
}
/**
* Given an array of existing links, returns those links which are not in $this
* and thus should be deleted.
* @param array $existing
* @return array
*/
private function getLinkDeletions( $existing ) {
$del = array();
foreach ( $existing as $ns => $dbkeys ) {
if ( isset( $this->mLinks[$ns] ) ) {
$del[$ns] = array_diff_key( $existing[$ns], $this->mLinks[$ns] );
} else {
$del[$ns] = $existing[$ns];
}
}
return $del;
}
/**
* Given an array of existing templates, returns those templates which are not in $this
* and thus should be deleted.
* @param array $existing
* @return array
*/
private function getTemplateDeletions( $existing ) {
$del = array();
foreach ( $existing as $ns => $dbkeys ) {
if ( isset( $this->mTemplates[$ns] ) ) {
$del[$ns] = array_diff_key( $existing[$ns], $this->mTemplates[$ns] );
} else {
$del[$ns] = $existing[$ns];
}
}
return $del;
}
/**
* Given an array of existing images, returns those images which are not in $this
* and thus should be deleted.
* @param array $existing
* @return array
*/
private function getImageDeletions( $existing ) {
return array_diff_key( $existing, $this->mImages );
}
/**
* Given an array of existing external links, returns those links which are not
* in $this and thus should be deleted.
* @param array $existing
* @return array
*/
private function getExternalDeletions( $existing ) {
return array_diff_key( $existing, $this->mExternals );
}
/**
* Given an array of existing categories, returns those categories which are not in $this
* and thus should be deleted.
* @param array $existing
* @return array
*/
private function getCategoryDeletions( $existing ) {
return array_diff_assoc( $existing, $this->mCategories );
}
/**
* Given an array of existing interlanguage links, returns those links which are not
* in $this and thus should be deleted.
* @param array $existing
* @return array
*/
private function getInterlangDeletions( $existing ) {
return array_diff_assoc( $existing, $this->mInterlangs );
}
/**
* Get array of properties which should be deleted.
* @param array $existing
* @return array
*/
function getPropertyDeletions( $existing ) {
return array_diff_assoc( $existing, $this->mProperties );
}
/**
* Given an array of existing interwiki links, returns those links which are not in $this
* and thus should be deleted.
* @param array $existing
* @return array
*/
private function getInterwikiDeletions( $existing ) {
$del = array();
foreach ( $existing as $prefix => $dbkeys ) {
if ( isset( $this->mInterwikis[$prefix] ) ) {
$del[$prefix] = array_diff_key( $existing[$prefix], $this->mInterwikis[$prefix] );
} else {
$del[$prefix] = $existing[$prefix];
}
}
return $del;
}
/**
* Get an array of existing links, as a 2-D array
*
* @return array
*/
private function getExistingLinks() {
$res = $this->mDb->select( 'pagelinks', array( 'pl_namespace', 'pl_title' ),
array( 'pl_from' => $this->mId ), __METHOD__, $this->mOptions );
$arr = array();
foreach ( $res as $row ) {
if ( !isset( $arr[$row->pl_namespace] ) ) {
$arr[$row->pl_namespace] = array();
}
$arr[$row->pl_namespace][$row->pl_title] = 1;
}
return $arr;
}
/**
* Get an array of existing templates, as a 2-D array
*
* @return array
*/
private function getExistingTemplates() {
$res = $this->mDb->select( 'templatelinks', array( 'tl_namespace', 'tl_title' ),
array( 'tl_from' => $this->mId ), __METHOD__, $this->mOptions );
$arr = array();
foreach ( $res as $row ) {
if ( !isset( $arr[$row->tl_namespace] ) ) {
$arr[$row->tl_namespace] = array();
}
$arr[$row->tl_namespace][$row->tl_title] = 1;
}
return $arr;
}
/**
* Get an array of existing images, image names in the keys
*
* @return array
*/
private function getExistingImages() {
$res = $this->mDb->select( 'imagelinks', array( 'il_to' ),
array( 'il_from' => $this->mId ), __METHOD__, $this->mOptions );
$arr = array();
foreach ( $res as $row ) {
$arr[$row->il_to] = 1;
}
return $arr;
}
/**
* Get an array of existing external links, URLs in the keys
*
* @return array
*/
private function getExistingExternals() {
$res = $this->mDb->select( 'externallinks', array( 'el_to' ),
array( 'el_from' => $this->mId ), __METHOD__, $this->mOptions );
$arr = array();
foreach ( $res as $row ) {
$arr[$row->el_to] = 1;
}
return $arr;
}
/**
* Get an array of existing categories, with the name in the key and sort key in the value.
*
* @return array
*/
private function getExistingCategories() {
$res = $this->mDb->select( 'categorylinks', array( 'cl_to', 'cl_sortkey_prefix' ),
array( 'cl_from' => $this->mId ), __METHOD__, $this->mOptions );
$arr = array();
foreach ( $res as $row ) {
$arr[$row->cl_to] = $row->cl_sortkey_prefix;
}
return $arr;
}
/**
* Get an array of existing interlanguage links, with the language code in the key and the
* title in the value.
*
* @return array
*/
private function getExistingInterlangs() {
$res = $this->mDb->select( 'langlinks', array( 'll_lang', 'll_title' ),
array( 'll_from' => $this->mId ), __METHOD__, $this->mOptions );
$arr = array();
foreach ( $res as $row ) {
$arr[$row->ll_lang] = $row->ll_title;
}
return $arr;
}
/**
* Get an array of existing inline interwiki links, as a 2-D array
* @return array (prefix => array(dbkey => 1))
*/
protected function getExistingInterwikis() {
$res = $this->mDb->select( 'iwlinks', array( 'iwl_prefix', 'iwl_title' ),
array( 'iwl_from' => $this->mId ), __METHOD__, $this->mOptions );
$arr = array();
foreach ( $res as $row ) {
if ( !isset( $arr[$row->iwl_prefix] ) ) {
$arr[$row->iwl_prefix] = array();
}
$arr[$row->iwl_prefix][$row->iwl_title] = 1;
}
return $arr;
}
/**
* Get an array of existing categories, with the name in the key and sort key in the value.
*
* @return array Array of property names and values
*/
private function getExistingProperties() {
$res = $this->mDb->select( 'page_props', array( 'pp_propname', 'pp_value' ),
array( 'pp_page' => $this->mId ), __METHOD__, $this->mOptions );
$arr = array();
foreach ( $res as $row ) {
$arr[$row->pp_propname] = $row->pp_value;
}
return $arr;
}
/**
* Return the title object of the page being updated
* @return Title
*/
public function getTitle() {
return $this->mTitle;
}
/**
* Returns parser output
* @since 1.19
* @return ParserOutput
*/
public function getParserOutput() {
return $this->mParserOutput;
}
/**
* Return the list of images used as generated by the parser
* @return array
*/
public function getImages() {
return $this->mImages;
}
/**
* Invalidate any necessary link lists related to page property changes
* @param array $changed
*/
private function invalidateProperties( $changed ) {
global $wgPagePropLinkInvalidations;
foreach ( $changed as $name => $value ) {
if ( isset( $wgPagePropLinkInvalidations[$name] ) ) {
$inv = $wgPagePropLinkInvalidations[$name];
if ( !is_array( $inv ) ) {
$inv = array( $inv );
}
foreach ( $inv as $table ) {
$update = new HTMLCacheUpdate( $this->mTitle, $table );
$update->doUpdate();
}
}
}
}
/**
* Fetch page links added by this LinksUpdate. Only available after the update is complete.
* @since 1.22
* @return null|array Array of Titles
*/
public function getAddedLinks() {
if ( $this->linkInsertions === null ) {
return null;
}
$result = array();
foreach ( $this->linkInsertions as $insertion ) {
$result[] = Title::makeTitle( $insertion['pl_namespace'], $insertion['pl_title'] );
}
return $result;
}
/**
* Fetch page links removed by this LinksUpdate. Only available after the update is complete.
* @since 1.22
* @return null|array Array of Titles
*/
public function getRemovedLinks() {
if ( $this->linkDeletions === null ) {
return null;
}
$result = array();
foreach ( $this->linkDeletions as $ns => $titles ) {
foreach ( $titles as $title => $unused ) {
$result[] = Title::makeTitle( $ns, $title );
}
}
return $result;
}
/**
* Update links table freshness
*/
protected function updateLinksTimestamp() {
if ( $this->mId ) {
// The link updates made here only reflect the freshness of the parser output
$timestamp = $this->mParserOutput->getCacheTime();
$this->mDb->update( 'page',
array( 'page_links_updated' => $this->mDb->timestamp( $timestamp ) ),
array( 'page_id' => $this->mId ),
__METHOD__
);
}
}
}
/**
* Update object handling the cleanup of links tables after a page was deleted.
**/
class LinksDeletionUpdate extends SqlDataUpdate {
/** @var WikiPage The WikiPage that was deleted */
protected $mPage;
/**
* Constructor
*
* @param WikiPage $page Page we are updating
* @throws MWException
*/
function __construct( WikiPage $page ) {
parent::__construct( false ); // no implicit transaction
$this->mPage = $page;
if ( !$page->exists() ) {
throw new MWException( "Page ID not known, perhaps the page doesn't exist?" );
}
}
/**
* Do some database updates after deletion
*/
public function doUpdate() {
$title = $this->mPage->getTitle();
$id = $this->mPage->getId();
# Delete restrictions for it
$this->mDb->delete( 'page_restrictions', array( 'pr_page' => $id ), __METHOD__ );
# Fix category table counts
$cats = array();
$res = $this->mDb->select( 'categorylinks', 'cl_to', array( 'cl_from' => $id ), __METHOD__ );
foreach ( $res as $row ) {
$cats[] = $row->cl_to;
}
$this->mPage->updateCategoryCounts( array(), $cats );
# If using cascading deletes, we can skip some explicit deletes
if ( !$this->mDb->cascadingDeletes() ) {
# Delete outgoing links
$this->mDb->delete( 'pagelinks', array( 'pl_from' => $id ), __METHOD__ );
$this->mDb->delete( 'imagelinks', array( 'il_from' => $id ), __METHOD__ );
$this->mDb->delete( 'categorylinks', array( 'cl_from' => $id ), __METHOD__ );
$this->mDb->delete( 'templatelinks', array( 'tl_from' => $id ), __METHOD__ );
$this->mDb->delete( 'externallinks', array( 'el_from' => $id ), __METHOD__ );
$this->mDb->delete( 'langlinks', array( 'll_from' => $id ), __METHOD__ );
$this->mDb->delete( 'iwlinks', array( 'iwl_from' => $id ), __METHOD__ );
$this->mDb->delete( 'redirect', array( 'rd_from' => $id ), __METHOD__ );
$this->mDb->delete( 'page_props', array( 'pp_page' => $id ), __METHOD__ );
}
# If using cleanup triggers, we can skip some manual deletes
if ( !$this->mDb->cleanupTriggers() ) {
# Clean up recentchanges entries...
$this->mDb->delete( 'recentchanges',
array( 'rc_type != ' . RC_LOG,
'rc_namespace' => $title->getNamespace(),
'rc_title' => $title->getDBkey() ),
__METHOD__ );
$this->mDb->delete( 'recentchanges',
array( 'rc_type != ' . RC_LOG, 'rc_cur_id' => $id ),
__METHOD__ );
}
}
/**
* Update all the appropriate counts in the category table.
* @param array $added Associative array of category name => sort key
* @param array $deleted Associative array of category name => sort key
*/
function updateCategoryCounts( $added, $deleted ) {
$a = WikiPage::factory( $this->mTitle );
$a->updateCategoryCounts(
array_keys( $added ), array_keys( $deleted )
);
}
}
Mini Shell