mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/Gadgets
synced 2024-11-15 11:31:40 +00:00
271 lines
7.7 KiB
PHP
271 lines
7.7 KiB
PHP
<?php
|
|
|
|
use MediaWiki\Linker\LinkTarget;
|
|
use MediaWiki\MediaWikiServices;
|
|
use Wikimedia\Rdbms\Database;
|
|
|
|
/**
|
|
* Gadgets repo powered by MediaWiki:Gadgets-definition
|
|
*/
|
|
class MediaWikiGadgetsDefinitionRepo extends GadgetRepo {
|
|
const CACHE_VERSION = 2;
|
|
|
|
private $definitionCache;
|
|
|
|
/**
|
|
* @param string $id
|
|
*
|
|
* @return Gadget
|
|
* @throws InvalidArgumentException
|
|
*/
|
|
public function getGadget( $id ) {
|
|
$gadgets = $this->loadGadgets();
|
|
if ( !isset( $gadgets[$id] ) ) {
|
|
throw new InvalidArgumentException( "No gadget registered for '$id'" );
|
|
}
|
|
|
|
return $gadgets[$id];
|
|
}
|
|
|
|
public function getGadgetIds() {
|
|
$gadgets = $this->loadGadgets();
|
|
if ( $gadgets ) {
|
|
return array_keys( $gadgets );
|
|
} else {
|
|
return [];
|
|
}
|
|
}
|
|
|
|
public function handlePageUpdate( LinkTarget $target ) {
|
|
if ( $target->getNamespace() == NS_MEDIAWIKI && $target->getText() == 'Gadgets-definition' ) {
|
|
$this->purgeDefinitionCache();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Purge the definitions cache, for example if MediaWiki:Gadgets-definition
|
|
* was edited.
|
|
*/
|
|
private function purgeDefinitionCache() {
|
|
$cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
|
|
$cache->touchCheckKey( $this->getDefinitionCacheKey() );
|
|
}
|
|
|
|
private function getDefinitionCacheKey() {
|
|
$cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
|
|
|
|
return $cache->makeKey(
|
|
'gadgets-definition',
|
|
Gadget::GADGET_CLASS_VERSION,
|
|
self::CACHE_VERSION
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Loads list of gadgets and returns it as associative array of sections with gadgets
|
|
* e.g. [ 'sectionnname1' => [ $gadget1, $gadget2 ],
|
|
* 'sectionnname2' => [ $gadget3 ] ];
|
|
* @return array|bool Gadget array or false on failure
|
|
*/
|
|
protected function loadGadgets() {
|
|
if ( $this->definitionCache !== null ) {
|
|
return $this->definitionCache; // process cache hit
|
|
}
|
|
|
|
// Ideally $t1Cache is APC, and $wanCache is memcached
|
|
$t1Cache = ObjectCache::getLocalServerInstance( 'hash' );
|
|
$wanCache = MediaWikiServices::getInstance()->getMainWANObjectCache();
|
|
|
|
$key = $this->getDefinitionCacheKey();
|
|
|
|
// (a) Check the tier 1 cache
|
|
$value = $t1Cache->get( $key );
|
|
// Randomize logical APC expiry to avoid stampedes
|
|
// somewhere between 7.0 and 15.0 (seconds)
|
|
$cutoffAge = mt_rand( 7 * 1e6, 15 * 1e6 ) / 1e6;
|
|
// Check if it passes a blind TTL check (avoids I/O)
|
|
if ( $value && ( microtime( true ) - $value['time'] ) < $cutoffAge ) {
|
|
$this->definitionCache = $value['gadgets']; // process cache
|
|
return $this->definitionCache;
|
|
}
|
|
// Cache generated after the "check" time should be up-to-date
|
|
$ckTime = $wanCache->getCheckKeyTime( $key ) + WANObjectCache::HOLDOFF_TTL;
|
|
if ( $value && $value['time'] > $ckTime ) {
|
|
$this->definitionCache = $value['gadgets']; // process cache
|
|
return $this->definitionCache;
|
|
}
|
|
|
|
// (b) Fetch value from WAN cache or regenerate if needed.
|
|
// This is hit occasionally and more so when the list changes.
|
|
$us = $this;
|
|
$value = $wanCache->getWithSetCallback(
|
|
$key,
|
|
Gadget::CACHE_TTL,
|
|
function ( $old, &$ttl, &$setOpts ) use ( $us ) {
|
|
$setOpts += Database::getCacheSetOptions( wfGetDB( DB_REPLICA ) );
|
|
|
|
$now = microtime( true );
|
|
$gadgets = $us->fetchStructuredList();
|
|
if ( $gadgets === false ) {
|
|
$ttl = WANObjectCache::TTL_UNCACHEABLE;
|
|
}
|
|
|
|
return [ 'gadgets' => $gadgets, 'time' => $now ];
|
|
},
|
|
[ 'checkKeys' => [ $key ], 'lockTSE' => 300 ]
|
|
);
|
|
|
|
// Update the tier 1 cache as needed
|
|
if ( $value['gadgets'] !== false && $value['time'] > $ckTime ) {
|
|
// Set a modest TTL to keep the WAN key in cache
|
|
$t1Cache->set( $key, $value, mt_rand( 300, 600 ) );
|
|
}
|
|
|
|
$this->definitionCache = $value['gadgets'];
|
|
|
|
return $this->definitionCache;
|
|
}
|
|
|
|
/**
|
|
* Fetch list of gadgets and returns it as associative array of sections with gadgets
|
|
* e.g. [ $name => $gadget1, etc. ]
|
|
* @param string|null $forceNewText Injected text of MediaWiki:gadgets-definition [optional]
|
|
* @return array|bool
|
|
*/
|
|
public function fetchStructuredList( $forceNewText = null ) {
|
|
if ( $forceNewText === null ) {
|
|
// T157210: avoid using wfMessage() to avoid staleness due to cache layering
|
|
$title = Title::makeTitle( NS_MEDIAWIKI, 'Gadgets-definition' );
|
|
$rev = Revision::newFromTitle( $title );
|
|
if ( !$rev || !$rev->getContent() || $rev->getContent()->isEmpty() ) {
|
|
return false; // don't cache
|
|
}
|
|
|
|
$g = $rev->getContent()->getNativeData();
|
|
} else {
|
|
$g = $forceNewText;
|
|
}
|
|
|
|
$gadgets = $this->listFromDefinition( $g );
|
|
if ( !count( $gadgets ) ) {
|
|
return false; // don't cache; Bug 37228
|
|
}
|
|
|
|
$source = $forceNewText !== null ? 'input text' : 'MediaWiki:Gadgets-definition';
|
|
wfDebug( __METHOD__ . ": $source parsed, cache entry should be updated\n" );
|
|
|
|
return $gadgets;
|
|
}
|
|
|
|
/**
|
|
* Generates a structured list of Gadget objects from a definition
|
|
*
|
|
* @param string $definition
|
|
* @return Gadget[] List of Gadget objects indexed by the gadget's name.
|
|
*/
|
|
private function listFromDefinition( $definition ) {
|
|
$definition = preg_replace( '/<!--.*?-->/s', '', $definition );
|
|
$lines = preg_split( '/(\r\n|\r|\n)+/', $definition );
|
|
|
|
$gadgets = [];
|
|
$section = '';
|
|
|
|
foreach ( $lines as $line ) {
|
|
$m = [];
|
|
if ( preg_match( '/^==+ *([^*:\s|]+?)\s*==+\s*$/', $line, $m ) ) {
|
|
$section = $m[1];
|
|
} else {
|
|
$gadget = $this->newFromDefinition( $line, $section );
|
|
if ( $gadget ) {
|
|
$gadgets[$gadget->getName()] = $gadget;
|
|
}
|
|
}
|
|
}
|
|
|
|
return $gadgets;
|
|
}
|
|
|
|
/**
|
|
* Creates an instance of this class from definition in MediaWiki:Gadgets-definition
|
|
* @param string $definition Gadget definition
|
|
* @param string $category
|
|
* @return Gadget|bool Instance of Gadget class or false if $definition is invalid
|
|
*/
|
|
public function newFromDefinition( $definition, $category ) {
|
|
$m = [];
|
|
if ( !preg_match(
|
|
'/^\*+ *([a-zA-Z](?:[-_:.\w\d ]*[a-zA-Z0-9])?)(\s*\[.*?\])?\s*((\|[^|]*)+)\s*$/',
|
|
$definition,
|
|
$m
|
|
) ) {
|
|
return false;
|
|
}
|
|
// NOTE: the gadget name is used as part of the name of a form field,
|
|
// and must follow the rules defined in https://www.w3.org/TR/html4/types.html#type-cdata
|
|
// Also, title-normalization applies.
|
|
$info = [ 'category' => $category ];
|
|
$info['name'] = trim( str_replace( ' ', '_', $m[1] ) );
|
|
// If the name is too long, then RL will throw an MWException when
|
|
// we try to register the module
|
|
if ( !Gadget::isValidGadgetID( $info['name'] ) ) {
|
|
return false;
|
|
}
|
|
$info['definition'] = $definition;
|
|
$options = trim( $m[2], ' []' );
|
|
|
|
foreach ( preg_split( '/\s*\|\s*/', $options, -1, PREG_SPLIT_NO_EMPTY ) as $option ) {
|
|
$arr = preg_split( '/\s*=\s*/', $option, 2 );
|
|
$option = $arr[0];
|
|
if ( isset( $arr[1] ) ) {
|
|
$params = explode( ',', $arr[1] );
|
|
$params = array_map( 'trim', $params );
|
|
} else {
|
|
$params = [];
|
|
}
|
|
|
|
switch ( $option ) {
|
|
case 'ResourceLoader':
|
|
$info['resourceLoaded'] = true;
|
|
break;
|
|
case 'dependencies':
|
|
$info['dependencies'] = $params;
|
|
break;
|
|
case 'peers':
|
|
$info['peers'] = $params;
|
|
break;
|
|
case 'rights':
|
|
$info['requiredRights'] = $params;
|
|
break;
|
|
case 'hidden':
|
|
$info['hidden'] = true;
|
|
break;
|
|
case 'skins':
|
|
$info['requiredSkins'] = $params;
|
|
break;
|
|
case 'default':
|
|
$info['onByDefault'] = true;
|
|
break;
|
|
case 'targets':
|
|
$info['targets'] = $params;
|
|
break;
|
|
case 'type':
|
|
// Single value, not a list
|
|
$info['type'] = $params[0] ?? '';
|
|
break;
|
|
}
|
|
}
|
|
|
|
foreach ( preg_split( '/\s*\|\s*/', $m[3], -1, PREG_SPLIT_NO_EMPTY ) as $page ) {
|
|
$page = "MediaWiki:Gadget-$page";
|
|
|
|
if ( preg_match( '/\.js/', $page ) ) {
|
|
$info['scripts'][] = $page;
|
|
} elseif ( preg_match( '/\.css/', $page ) ) {
|
|
$info['styles'][] = $page;
|
|
}
|
|
}
|
|
|
|
return new Gadget( $info );
|
|
}
|
|
}
|