X-Git-Url: http://git.cyclocoop.org/?a=blobdiff_plain;f=includes%2Fparser%2FPreprocessor.php;h=368d79ef4993ca245a1e072500c1f0cc6887ccae;hb=f0a28890a000b2c3259438a6b733ed46749c6e2a;hp=b32593c9f7ed085f55f0fdc47213a482d47c1e3f;hpb=31d0a18d3efd13f025633df1cc5a5be7b058f9a3;p=lhc%2Fweb%2Fwiklou.git

diff --git a/includes/parser/Preprocessor.php b/includes/parser/Preprocessor.php
index b32593c9f7..368d79ef49 100644
--- a/includes/parser/Preprocessor.php
+++ b/includes/parser/Preprocessor.php
@@ -21,23 +21,108 @@
  * @ingroup Parser
  */
 
+use MediaWiki\Logger\LoggerFactory;
+
 /**
  * @ingroup Parser
  */
-interface Preprocessor {
+abstract class Preprocessor {
+
+	const CACHE_VERSION = 1;
+
 	/**
-	 * Create a new preprocessor object based on an initialised Parser object
+	 * @var array Brace matching rules.
+	 */
+	protected $rules = [
+		'{' => [
+			'end' => '}',
+			'names' => [
+				2 => 'template',
+				3 => 'tplarg',
+			],
+			'min' => 2,
+			'max' => 3,
+		],
+		'[' => [
+			'end' => ']',
+			'names' => [ 2 => null ],
+			'min' => 2,
+			'max' => 2,
+		]
+	];
+
+	/**
+	 * Store a document tree in the cache.
 	 *
-	 * @param Parser $parser
+	 * @param string $text
+	 * @param int $flags
 	 */
-	public function __construct( $parser );
+	protected function cacheSetTree( $text, $flags, $tree ) {
+		$config = RequestContext::getMain()->getConfig();
+
+		$length = strlen( $text );
+		$threshold = $config->get( 'PreprocessorCacheThreshold' );
+		if ( $threshold === false || $length < $threshold || $length > 1e6 ) {
+			return false;
+		}
+
+		$key = wfMemcKey(
+			defined( 'static::CACHE_PREFIX' ) ? static::CACHE_PREFIX : static::class,
+			md5( $text ), $flags );
+		$value = sprintf( "%08d", static::CACHE_VERSION ) . $tree;
+
+		$cache = ObjectCache::getInstance( $config->get( 'MainCacheType' ) );
+		$cache->set( $key, $value, 86400 );
+
+		LoggerFactory::getInstance( 'Preprocessor' )
+			->info( "Cached preprocessor output (key: $key)" );
+	}
+
+	/**
+	 * Attempt to load a precomputed document tree for some given wikitext
+	 * from the cache.
+	 *
+	 * @param string $text
+	 * @param int $flags
+	 * @return PPNode_Hash_Tree|bool
+	 */
+	protected function cacheGetTree( $text, $flags ) {
+		$config = RequestContext::getMain()->getConfig();
+
+		$length = strlen( $text );
+		$threshold = $config->get( 'PreprocessorCacheThreshold' );
+		if ( $threshold === false || $length < $threshold || $length > 1e6 ) {
+			return false;
+		}
+
+		$cache = ObjectCache::getInstance( $config->get( 'MainCacheType' ) );
+
+		$key = wfMemcKey(
+			defined( 'static::CACHE_PREFIX' ) ? static::CACHE_PREFIX : static::class,
+			md5( $text ), $flags );
+
+		$value = $cache->get( $key );
+		if ( !$value ) {
+			return false;
+		}
+
+		$version = intval( substr( $value, 0, 8 ) );
+		if ( $version !== static::CACHE_VERSION ) {
+			return false;
+		}
+
+		LoggerFactory::getInstance( 'Preprocessor' )
+			->info( "Loaded preprocessor output from cache (key: $key)" );
+
+		return substr( $value, 8 );
+	}
 
 	/**
 	 * Create a new top-level frame for expansion of a page
 	 *
 	 * @return PPFrame
 	 */
-	public function newFrame();
+	abstract public function newFrame();
 
 	/**
 	 * Create a new custom frame for programmatic use of parameter replacement
@@ -47,7 +132,7 @@ interface Preprocessor {
 	 *
 	 * @return PPFrame
 	 */
-	public function newCustomFrame( $args );
+	abstract public function newCustomFrame( $args );
 
 	/**
 	 * Create a new custom node for programmatic use of parameter replacement
@@ -55,7 +140,7 @@ interface Preprocessor {
 	 *
 	 * @param array $values
 	 */
-	public function newPartNodeArray( $values );
+	abstract public function newPartNodeArray( $values );
 
 	/**
 	 * Preprocess text to a PPNode
@@ -65,7 +150,7 @@ interface Preprocessor {
 	 *
 	 * @return PPNode
 	 */
-	public function preprocessToObj( $text, $flags = 0 );
+	abstract public function preprocessToObj( $text, $flags = 0 );
 }
 
 /**