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<?php
namespace SMW\Protection;
use Onoi\Cache\Cache;
use SMW\CachedPropertyValuesPrefetcher;
use SMW\DIProperty;
use SMW\DIWikiPage;
use SMW\RequestOptions;
use Title;
/**
* Handles protection validation.
*
* The lookup is cached using the `CachedPropertyValuesPrefetcher` to avoid a
* continued access to the Store or DB layer.
*
* @license GNU GPL v2+
* @since 2.5
*
* @author mwjames
*/
class ProtectionValidator {
/**
* Reference used in InMemoryPoolCache
*/
const POOLCACHE_ID = 'protection.validator';
/**
* @var CachedPropertyValuesPrefetcher
*/
private $cachedPropertyValuesPrefetcher;
/**
* @var Cache
*/
private $intermediaryMemoryCache;
/**
* @var boolean|string
*/
private $editProtectionRight = false;
/**
* @var boolean|string
*/
private $createProtectionRight = false;
/**
* @var boolean|string
*/
private $changePropagationProtection = true;
/**
* @since 2.5
*
* @param CachedPropertyValuesPrefetcher $cachedPropertyValuesPrefetcher
* @param Cache $intermediaryMemoryCache
*/
public function __construct( CachedPropertyValuesPrefetcher $cachedPropertyValuesPrefetcher, Cache $intermediaryMemoryCache ) {
$this->cachedPropertyValuesPrefetcher = $cachedPropertyValuesPrefetcher;
$this->intermediaryMemoryCache = $intermediaryMemoryCache;
}
/**
* @since 2.5
*
* @param string|boolean $editProtectionRight
*/
public function setEditProtectionRight( $editProtectionRight ) {
$this->editProtectionRight = $editProtectionRight;
}
/**
* @since 3.0
*
* @return string|false
*/
public function getEditProtectionRight() {
return $this->editProtectionRight;
}
/**
* @since 2.5
*
* @param string|boolean $createProtectionRight
*/
public function setCreateProtectionRight( $createProtectionRight ) {
$this->createProtectionRight = $createProtectionRight;
}
/**
* @since 3.0
*
* @return string|false
*/
public function getCreateProtectionRight() {
return $this->createProtectionRight;
}
/**
* @since 3.0
*
* @param boolean $changePropagationProtection
*/
public function setChangePropagationProtection( $changePropagationProtection ) {
$this->changePropagationProtection = (bool)$changePropagationProtection;
}
/**
* @since 2.5
*
* @param DIWikiPage $subject
*/
private function resetCacheBy( DIWikiPage $subject ) {
$this->cachedPropertyValuesPrefetcher->resetCacheBy( $subject );
}
/**
* @since 2.5
*
* @param Title $title
*
* @return boolean
*/
public function hasEditProtectionOnNamespace( Title $title ) {
return $this->editProtectionRight && $this->checkProtection( DIWikiPage::newFromTitle( $title )->asBase() );
}
/**
* @since 2.5
*
* @param Title $title
*
* @return boolean
*/
public function hasChangePropagationProtection( Title $title ) {
$subject = DIWikiPage::newFromTitle( $title )->asBase();
$namespace = $subject->getNamespace();
if ( ( $namespace !== SMW_NS_PROPERTY && $namespace !== NS_CATEGORY ) || $this->changePropagationProtection === false ) {
return false;
}
return $this->checkProtection( $subject, new DIProperty( '_CHGPRO' ) );
}
/**
* @since 2.5
*
* @param Title $title
*
* @return boolean
*/
public function hasProtection( Title $title ) {
return $this->checkProtection( DIWikiPage::newFromTitle( $title )->asBase() );
}
/**
* @since 3.0
*
* @param Title $title
* @param Title $title
*
* @return boolean
*/
public function hasCreateProtection( Title $title ) {
return $this->createProtectionRight && !$title->userCan( 'edit' );
}
/**
* @note There is not direct validation of the permission within this method,
* it is done by the Title::userCan when probing against the User and hooks
* that carry out the permission check including the validation provided by
* SMW's `PermissionPthValidator`.
*
* @since 2.5
*
* @param Title $title
*
* @return boolean
*/
public function hasEditProtection( Title $title ) {
return !$title->userCan( 'edit' ) && $this->checkProtection( DIWikiPage::newFromTitle( $title )->asBase() );
}
private function checkProtection( $subject, $property = null ) {
if ( $property === null ) {
$property = new DIProperty( '_EDIP' );
}
$key = $subject->getHash() . $property->getKey();
$hasProtection = false;
if ( $this->intermediaryMemoryCache->contains( $key ) ) {
return $this->intermediaryMemoryCache->fetch( $key );
}
// Set editProtectionRight to influence the key to detect changes
// before the cache is evicted
$requestOptions = new RequestOptions();
$requestOptions->addExtraCondition( $this->editProtectionRight );
$dataItems = $this->cachedPropertyValuesPrefetcher->getPropertyValues(
$subject,
$property,
$requestOptions
);
if ( $dataItems !== null && $dataItems !== [] ) {
$hasProtection = $property->getKey() === '_EDIP' ? end( $dataItems )->getBoolean() : true;
}
$this->intermediaryMemoryCache->save( $key, $hasProtection );
return $hasProtection;
}
}
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