X-Git-Url: http://git.heureux-cyclage.org/?a=blobdiff_plain;f=includes%2FInterwiki.php;h=69bcd1ee239f005e9ffc023c776349fee237376a;hb=cec03907dfcfa8d4fd03e5746e22e66c0fb638d3;hp=0dfcd8789817756890f007cbff5fd8d6e7f6a9b6;hpb=3002e1d8a66c13e9b5504de2d5817c9ae7039e9b;p=lhc%2Fweb%2Fwiklou.git

diff --git a/includes/Interwiki.php b/includes/Interwiki.php
index 0dfcd87898..69bcd1ee23 100644
--- a/includes/Interwiki.php
+++ b/includes/Interwiki.php
@@ -1,5 +1,234 @@
-<?
+<?php
+/**
+ * @file
+ * Interwiki table entry
+ */
 
-/* This file is obsolete... 2003-08-21 */
+/**
+ * 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;
+	}
+}