MediaWiki 1.30.2

[autoinstallsdev/mediawiki.git] / includes / LinkCache.php

diff --git a/includes/LinkCache.php b/includes/LinkCache.php
deleted file mode 100644 (file)
index dce3459..0000000
--- a/includes/LinkCache.php
+++ /dev/null
@@ -1,201 +0,0 @@
-<?php
-/**
- * Cache for article titles (prefixed DB keys) and ids linked from one source
- *
- * @ingroup Cache
- */
-class LinkCache {
-       // Increment $mClassVer whenever old serialized versions of this class
-       // becomes incompatible with the new version.
-       /* private */ var $mClassVer = 4;
-
-       /* private */ var $mGoodLinks, $mBadLinks;
-       /* private */ var $mForUpdate;
-
-       /**
-        * Get an instance of this class
-        */
-       static function &singleton() {
-               static $instance;
-               if ( !isset( $instance ) ) {
-                       $instance = new LinkCache;
-               }
-               return $instance;
-       }
-
-       function __construct() {
-               $this->mForUpdate = false;
-               $this->mGoodLinks = array();
-               $this->mGoodLinkFields = array();
-               $this->mBadLinks = array();
-       }
-
-       /**
-        * General accessor to get/set whether SELECT FOR UPDATE should be used
-        */
-       public function forUpdate( $update = null ) {
-               return wfSetVar( $this->mForUpdate, $update );
-       }
-
-       public function getGoodLinkID( $title ) {
-               if ( array_key_exists( $title, $this->mGoodLinks ) ) {
-                       return $this->mGoodLinks[$title];
-               } else {
-                       return 0;
-               }
-       }
-
-       /**
-        * Get a field of a title object from cache.
-        * If this link is not good, it will return NULL.
-        * @param $title Title
-        * @param $field String: ('length','redirect','revision')
-        * @return mixed
-        */
-       public function getGoodLinkFieldObj( $title, $field ) {
-               $dbkey = $title->getPrefixedDbKey();
-               if ( array_key_exists( $dbkey, $this->mGoodLinkFields ) ) {
-                       return $this->mGoodLinkFields[$dbkey][$field];
-               } else {
-                       return null;
-               }
-       }
-
-       public function isBadLink( $title ) {
-               return array_key_exists( $title, $this->mBadLinks );
-       }
-
-       /**
-        * Add a link for the title to the link cache
-        *
-        * @param $id Integer: page's ID
-        * @param $title Title object
-        * @param $len Integer: text's length
-        * @param $redir Integer: whether the page is a redirect
-        * @param $revision Integer: latest revision's ID
-        */
-       public function addGoodLinkObj( $id, $title, $len = -1, $redir = null, $revision = false ) {
-               $dbkey = $title->getPrefixedDbKey();
-               $this->mGoodLinks[$dbkey] = intval( $id );
-               $this->mGoodLinkFields[$dbkey] = array(
-                       'length' => intval( $len ),
-                       'redirect' => intval( $redir ),
-                       'revision' => intval( $revision ) );
-       }
-
-       public function addBadLinkObj( $title ) {
-               $dbkey = $title->getPrefixedDbKey();
-               if ( !$this->isBadLink( $dbkey ) ) {
-                       $this->mBadLinks[$dbkey] = 1;
-               }
-       }
-
-       public function clearBadLink( $title ) {
-               unset( $this->mBadLinks[$title] );
-       }
-
-       public function clearLink( $title ) {
-               $dbkey = $title->getPrefixedDbKey();
-               if( isset($this->mBadLinks[$dbkey]) ) {
-                       unset($this->mBadLinks[$dbkey]);
-               }
-               if( isset($this->mGoodLinks[$dbkey]) ) {
-                       unset($this->mGoodLinks[$dbkey]);
-               }
-               if( isset($this->mGoodLinkFields[$dbkey]) ) {
-                       unset($this->mGoodLinkFields[$dbkey]);
-               }
-       }
-
-       public function getGoodLinks() { return $this->mGoodLinks; }
-       public function getBadLinks() { return array_keys( $this->mBadLinks ); }
-
-       /**
-        * Add a title to the link cache, return the page_id or zero if non-existent
-        *
-        * @param $title String: title to add
-        * @return Integer
-        */
-       public function addLink( $title ) {
-               $nt = Title::newFromDBkey( $title );
-               if( $nt ) {
-                       return $this->addLinkObj( $nt );
-               } else {
-                       return 0;
-               }
-       }
-
-       /**
-        * Add a title to the link cache, return the page_id or zero if non-existent
-        *
-        * @param $nt Title object to add
-        * @return Integer
-        */
-       public function addLinkObj( $nt ) {
-               global $wgAntiLockFlags;
-               wfProfileIn( __METHOD__ );
-
-               $key = $nt->getPrefixedDBkey();
-               if ( $this->isBadLink( $key ) ) {
-                       wfProfileOut( __METHOD__ );
-                       return 0;
-               }
-               $id = $this->getGoodLinkID( $key );
-               if ( $id != 0 ) {
-                       wfProfileOut( __METHOD__ );
-                       return $id;
-               }
-
-               if ( $key === '' ) {
-                       wfProfileOut( __METHOD__ );
-                       return 0;
-               }
-               
-               # Some fields heavily used for linking...
-               if ( $this->mForUpdate ) {
-                       $db = wfGetDB( DB_MASTER );
-                       if ( !( $wgAntiLockFlags & ALF_NO_LINK_LOCK ) ) {
-                               $options = array( 'FOR UPDATE' );
-                       } else {
-                               $options = array();
-                       }
-               } else {
-                       $db = wfGetDB( DB_SLAVE );
-                       $options = array();
-               }
-
-               $s = $db->selectRow( 'page', 
-                       array( 'page_id', 'page_len', 'page_is_redirect', 'page_latest' ),
-                       array( 'page_namespace' => $nt->getNamespace(), 'page_title' => $nt->getDBkey() ),
-                       __METHOD__, $options );
-               # Set fields...
-               if ( $s !== false ) {
-                       $id = intval( $s->page_id );
-                       $len = intval( $s->page_len );
-                       $redirect = intval( $s->page_is_redirect );
-                       $revision = intval( $s->page_latest );
-               } else {
-                       $id = 0;
-                       $len = -1;
-                       $redirect = 0;
-                       $revision = 0;
-               }
-
-               if ( $id == 0 ) {
-                       $this->addBadLinkObj( $nt );
-               } else {
-                       $this->addGoodLinkObj( $id, $nt, $len, $redirect, $revision );
-               }
-               wfProfileOut( __METHOD__ );
-               return $id;
-       }
-
-       /**
-        * Clears cache
-        */
-       public function clear() {
-               $this->mGoodLinks = array();
-               $this->mGoodLinkFields = array();
-               $this->mBadLinks = array();
-       }
-}