-<?
+<?php
/**
- * This file is obsolete... 2003-08-21
- * @deprecated
- * @package MediaWiki
+ * @file
+ * Interwiki table entry
*/
-?>
+
+/**
+ * The interwiki class
+ * All information is loaded on creation when called by Interwiki::fetch( $prefix ).
+ * All work is done on slave, because this should *never* change (except during schema updates etc, which arent wiki-related)
+ */
+class Interwiki {
+
+ // Cache - removes oldest entry when it hits limit
+ protected static $smCache = array();
+ const CACHE_LIMIT = 100; // 0 means unlimited, any other value is max number of entries.
+
+ protected $mPrefix, $mURL, $mLocal, $mTrans;
+
+ public function __construct( $prefix = null, $url = '', $local = 0, $trans = 0 ) {
+ $this->mPrefix = $prefix;
+ $this->mURL = $url;
+ $this->mLocal = $local;
+ $this->mTrans = $trans;
+ }
+
+ /**
+ * Check whether an interwiki prefix exists
+ *
+ * @return bool Whether it exists
+ * @param $prefix string Interwiki prefix to use
+ */
+ static public function isValidInterwiki( $prefix ) {
+ $result = self::fetch( $prefix );
+ return (bool)$result;
+ }
+
+ /**
+ * Fetch an Interwiki object
+ *
+ * @return Interwiki Object, or null if not valid
+ * @param $prefix string Interwiki prefix to use
+ */
+ static public function fetch( $prefix ) {
+ global $wgContLang;
+ if( $prefix == '' ) {
+ return null;
+ }
+ $prefix = $wgContLang->lc( $prefix );
+ if( isset( self::$smCache[$prefix] ) ) {
+ return self::$smCache[$prefix];
+ }
+ global $wgInterwikiCache;
+ if( $wgInterwikiCache ) {
+ $iw = Interwiki::getInterwikiCached( $prefix );
+ } else {
+ $iw = Interwiki::load( $prefix );
+ if( !$iw ) {
+ $iw = false;
+ }
+ }
+ if( self::CACHE_LIMIT && count( self::$smCache ) >= self::CACHE_LIMIT ) {
+ reset( self::$smCache );
+ unset( self::$smCache[ key( self::$smCache ) ] );
+ }
+ self::$smCache[$prefix] = $iw;
+ return $iw;
+ }
+
+ /**
+ * Fetch interwiki prefix data from local cache in constant database.
+ *
+ * @note More logic is explained in DefaultSettings.
+ *
+ * @param $prefix \type{\string} Interwiki prefix
+ * @return \type{\Interwiki} An interwiki object
+ */
+ protected static function getInterwikiCached( $prefix ) {
+ $value = self::getInterwikiCacheEntry( $prefix );
+
+ $s = new Interwiki( $prefix );
+ if ( $value != '' ) {
+ // Split values
+ list( $local, $url ) = explode( ' ', $value, 2 );
+ $s->mURL = $url;
+ $s->mLocal = (int)$local;
+ } else {
+ $s = false;
+ }
+ return $s;
+ }
+
+ /**
+ * Get entry from interwiki cache
+ *
+ * @note More logic is explained in DefaultSettings.
+ *
+ * @param $prefix \type{\string} Database key
+ * @return \type{\string) The entry
+ */
+ protected static function getInterwikiCacheEntry( $prefix ) {
+ global $wgInterwikiCache, $wgInterwikiScopes, $wgInterwikiFallbackSite;
+ static $db, $site;
+
+ wfDebug( __METHOD__ . "( $prefix )\n" );
+ if( !$db ) {
+ $db = CdbReader::open( $wgInterwikiCache );
+ }
+ /* Resolve site name */
+ if( $wgInterwikiScopes>=3 && !$site ) {
+ $site = $db->get( '__sites:' . wfWikiID() );
+ if ( $site == '' ) {
+ $site = $wgInterwikiFallbackSite;
+ }
+ }
+
+ $value = $db->get( wfMemcKey( $prefix ) );
+ // Site level
+ if ( $value == '' && $wgInterwikiScopes >= 3 ) {
+ $value = $db->get( "_{$site}:{$prefix}" );
+ }
+ // Global Level
+ if ( $value == '' && $wgInterwikiScopes >= 2 ) {
+ $value = $db->get( "__global:{$prefix}" );
+ }
+ if ( $value == 'undef' )
+ $value = '';
+
+ return $value;
+ }
+
+ /**
+ * Load the interwiki, trying first memcached then the DB
+ *
+ * @param $prefix The interwiki prefix
+ * @return bool The prefix is valid
+ * @static
+ */
+ protected static function load( $prefix ) {
+ global $wgMemc, $wgInterwikiExpiry;
+ $key = wfMemcKey( 'interwiki', $prefix );
+ $mc = $wgMemc->get( $key );
+ $iw = false;
+ if( $mc && is_array( $mc ) ) { // is_array is hack for old keys
+ $iw = Interwiki::loadFromArray( $mc );
+ if( $iw ) {
+ return $iw;
+ }
+ }
+
+ $db = wfGetDB( DB_SLAVE );
+
+ $row = $db->fetchRow( $db->select( 'interwiki', '*', array( 'iw_prefix' => $prefix ),
+ __METHOD__ ) );
+ $iw = Interwiki::loadFromArray( $row );
+ if ( $iw ) {
+ $mc = array( 'iw_url' => $iw->mURL, 'iw_local' => $iw->mLocal, 'iw_trans' => $iw->mTrans );
+ $wgMemc->add( $key, $mc, $wgInterwikiExpiry );
+ return $iw;
+ }
+
+ return false;
+ }
+
+ /**
+ * Fill in member variables from an array (e.g. memcached result, Database::fetchRow, etc)
+ *
+ * @return bool Whether everything was there
+ * @param $res ResultWrapper Row from the interwiki table
+ * @static
+ */
+ protected static function loadFromArray( $mc ) {
+ if( isset( $mc['iw_url'] ) && isset( $mc['iw_local'] ) && isset( $mc['iw_trans'] ) ) {
+ $iw = new Interwiki();
+ $iw->mURL = $mc['iw_url'];
+ $iw->mLocal = $mc['iw_local'];
+ $iw->mTrans = $mc['iw_trans'];
+ return $iw;
+ }
+ return false;
+ }
+
+ /**
+ * Get the URL for a particular title (or with $1 if no title given)
+ *
+ * @param $title string What text to put for the article name
+ * @return string The URL
+ */
+ public function getURL( $title = null ) {
+ $url = $this->mURL;
+ if( $title != null ) {
+ $url = str_replace( "$1", $title, $url );
+ }
+ return $url;
+ }
+
+ /**
+ * Is this a local link from a sister project, or is
+ * it something outside, like Google
+ * @return bool
+ */
+ public function isLocal() {
+ return $this->mLocal;
+ }
+
+ /**
+ * Can pages from this wiki be transcluded?
+ * Still requires $wgEnableScaryTransclusion
+ * @return bool
+ */
+ public function isTranscludable() {
+ return $this->mTrans;
+ }
+
+ /**
+ * Get the name for the interwiki site
+ * @return String
+ */
+ public function getName() {
+ $key = 'interwiki-name-' . $this->mPrefix;
+ $msg = wfMsgForContent( $key );
+ return wfEmptyMsg( $key, $msg ) ? '' : $msg;
+ }
+
+ /**
+ * Get a description for this interwiki
+ * @return String
+ */
+ public function getDescription() {
+ $key = 'interwiki-desc-' . $this->mPrefix;
+ $msg = wfMsgForContent( $key );
+ return wfEmptyMsg( $key, $msg ) ? '' : $msg;
+ }
+}
dépôts / lhc / web / wiklou.git / blobdiff