421 lines
12 KiB
PHP
421 lines
12 KiB
PHP
<?php
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/**
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* MediaWiki is the to-be base class for this whole project
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*/
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class MediaWiki {
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var $GET; /* Stores the $_GET variables at time of creation, can be changed */
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var $params = array();
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/**
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* Constructor
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*/
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function MediaWiki () {
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$this->GET = $_GET;
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}
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/**
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* Stores key/value pairs to circumvent global variables
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* Note that keys are case-insensitive!
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*/
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function setVal( $key, &$value ) {
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$key = strtolower( $key );
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$this->params[$key] =& $value;
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}
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/**
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* Retrieves key/value pairs to circumvent global variables
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* Note that keys are case-insensitive!
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*/
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function getVal( $key, $default = '' ) {
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$key = strtolower( $key );
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if( isset( $this->params[$key] ) ) {
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return $this->params[$key];
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}
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return $default;
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}
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/**
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* Initialization of ... everything
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@return Article either the object to become $wgArticle, or NULL
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*/
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function initialize ( &$title, &$output, &$user, $request) {
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wfProfileIn( 'MediaWiki::initialize' );
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$this->preliminaryChecks ( $title, $output, $request ) ;
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$article = NULL;
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if ( !$this->initializeSpecialCases( $title, $output, $request ) ) {
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$article = $this->initializeArticle( $title, $request );
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if( is_object( $article ) ) {
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$this->performAction( $output, $article, $title, $user, $request );
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} elseif( is_string( $article ) ) {
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$output->redirect( $article );
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} else {
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throw new MWException( "Shouldn't happen: MediaWiki::initializeArticle() returned neither an object nor a URL" );
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}
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}
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wfProfileOut( 'MediaWiki::initialize' );
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return $article;
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}
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/**
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* Checks some initial queries
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* Note that $title here is *not* a Title object, but a string!
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*/
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function checkInitialQueries( $title,$action,&$output,$request, $lang) {
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if ($request->getVal( 'printable' ) == 'yes') {
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$output->setPrintable();
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}
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$ret = NULL ;
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if ( '' == $title && 'delete' != $action ) {
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$ret = Title::newFromText( wfMsgForContent( 'mainpage' ) );
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} elseif ( $curid = $request->getInt( 'curid' ) ) {
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# URLs like this are generated by RC, because rc_title isn't always accurate
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$ret = Title::newFromID( $curid );
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} else {
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$ret = Title::newFromURL( $title );
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/* check variant links so that interwiki links don't have to worry about
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the possible different language variants
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*/
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if( count($lang->getVariants()) > 1 && !is_null($ret) && $ret->getArticleID() == 0 )
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$lang->findVariantLink( $title, $ret );
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}
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return $ret ;
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}
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/**
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* Checks for search query and anon-cannot-read case
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*/
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function preliminaryChecks ( &$title, &$output, $request ) {
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# Debug statement for user levels
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// print_r($wgUser);
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$search = $request->getText( 'search' );
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if( !is_null( $search ) && $search !== '' ) {
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// Compatibility with old search URLs which didn't use Special:Search
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// Do this above the read whitelist check for security...
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$title = SpecialPage::getTitleFor( 'Search' );
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}
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$this->setVal( 'Search', $search );
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# If the user is not logged in, the Namespace:title of the article must be in
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# the Read array in order for the user to see it. (We have to check here to
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# catch special pages etc. We check again in Article::view())
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if ( !is_null( $title ) && !$title->userCanRead() ) {
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$output->loginToUse();
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$output->output();
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exit;
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}
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}
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/**
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* Initialize the object to be known as $wgArticle for special cases
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*/
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function initializeSpecialCases ( &$title, &$output, $request ) {
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wfProfileIn( 'MediaWiki::initializeSpecialCases' );
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$search = $this->getVal('Search');
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$action = $this->getVal('Action');
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if( !$this->getVal('DisableInternalSearch') && !is_null( $search ) && $search !== '' ) {
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require_once( 'includes/SpecialSearch.php' );
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$title = SpecialPage::getTitleFor( 'Search' );
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wfSpecialSearch();
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} else if( !$title or $title->getDBkey() == '' ) {
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$title = SpecialPage::getTitleFor( 'Badtitle' );
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# Die now before we mess up $wgArticle and the skin stops working
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throw new ErrorPageError( 'badtitle', 'badtitletext' );
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} else if ( $title->getInterwiki() != '' ) {
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if( $rdfrom = $request->getVal( 'rdfrom' ) ) {
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$url = $title->getFullURL( 'rdfrom=' . urlencode( $rdfrom ) );
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} else {
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$url = $title->getFullURL();
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}
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/* Check for a redirect loop */
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if ( !preg_match( '/^' . preg_quote( $this->getVal('Server'), '/' ) . '/', $url ) && $title->isLocal() ) {
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$output->redirect( $url );
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} else {
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$title = SpecialPage::getTitleFor( 'Badtitle' );
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throw new ErrorPageError( 'badtitle', 'badtitletext' );
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}
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} else if ( ( $action == 'view' ) &&
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(!isset( $this->GET['title'] ) || $title->getPrefixedDBKey() != $this->GET['title'] ) &&
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!count( array_diff( array_keys( $this->GET ), array( 'action', 'title' ) ) ) )
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{
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/* Redirect to canonical url, make it a 301 to allow caching */
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$output->setSquidMaxage( 1200 );
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$output->redirect( $title->getFullURL(), '301');
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} else if ( NS_SPECIAL == $title->getNamespace() ) {
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/* actions that need to be made when we have a special pages */
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SpecialPage::executePath( $title );
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} else {
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/* No match to special cases */
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wfProfileOut( 'MediaWiki::initializeSpecialCases' );
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return false;
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}
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/* Did match a special case */
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wfProfileOut( 'MediaWiki::initializeSpecialCases' );
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return true;
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}
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/**
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* Create an Article object of the appropriate class for the given page.
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* @param Title $title
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* @return Article
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*/
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function articleFromTitle( $title ) {
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$article = null;
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wfRunHooks('ArticleFromTitle', array( &$title, &$article ) );
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if ( $article ) {
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return $article;
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}
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if( NS_MEDIA == $title->getNamespace() ) {
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// FIXME: where should this go?
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$title = Title::makeTitle( NS_IMAGE, $title->getDBkey() );
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}
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switch( $title->getNamespace() ) {
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case NS_IMAGE:
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return new ImagePage( $title );
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case NS_CATEGORY:
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return new CategoryPage( $title );
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default:
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return new Article( $title );
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}
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}
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/**
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* Initialize the object to be known as $wgArticle for "standard" actions
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* Create an Article object for the page, following redirects if needed.
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* @param Title $title
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* @param Request $request
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* @param string $action
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* @return mixed an Article, or a string to redirect to another URL
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*/
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function initializeArticle( $title, $request ) {
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global $wgTitle;
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wfProfileIn( 'MediaWiki::initializeArticle' );
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$action = $this->getVal('Action');
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$article = $this->articleFromTitle( $title );
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// Namespace might change when using redirects
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if( $action == 'view' && !$request->getVal( 'oldid' ) &&
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$request->getVal( 'redirect' ) != 'no' ) {
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$dbr =& wfGetDB(DB_SLAVE);
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$article->loadPageData($article->pageDataFromTitle($dbr, $title));
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/* Follow redirects only for... redirects */
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if ($article->mIsRedirect) {
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$target = $article->followRedirect();
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if( is_string( $target ) ) {
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global $wgDisableHardRedirects;
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if( !$wgDisableHardRedirects ) {
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// we'll need to redirect
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return $target;
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}
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}
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if( is_object( $target ) ) {
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/* Rewrite environment to redirected article */
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$rarticle = $this->articleFromTitle($target);
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$rarticle->loadPageData($rarticle->pageDataFromTitle($dbr,$target));
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if ($rarticle->mTitle->mArticleID) {
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$article = $rarticle;
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$wgTitle = $target;
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$article->setRedirectedFrom( $title );
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} else {
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$wgTitle = $title;
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}
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}
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} else {
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$wgTitle = $article->mTitle;
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}
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}
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wfProfileOut( 'MediaWiki::initializeArticle' );
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return $article;
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}
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/**
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* Cleaning up by doing deferred updates, calling loadbalancer and doing the output
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*/
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function finalCleanup ( &$deferredUpdates, &$loadBalancer, &$output ) {
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wfProfileIn( 'MediaWiki::finalCleanup' );
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$this->doUpdates( $deferredUpdates );
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$this->doJobs();
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$loadBalancer->saveMasterPos();
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# Now commit any transactions, so that unreported errors after output() don't roll back the whole thing
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$loadBalancer->commitAll();
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$output->output();
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wfProfileOut( 'MediaWiki::finalCleanup' );
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}
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/**
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* Deferred updates aren't really deferred anymore. It's important to report errors to the
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* user, and that means doing this before OutputPage::output(). Note that for page saves,
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* the client will wait until the script exits anyway before following the redirect.
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*/
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function doUpdates ( &$updates ) {
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wfProfileIn( 'MediaWiki::doUpdates' );
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$dbw =& wfGetDB( DB_MASTER );
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foreach( $updates as $up ) {
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$up->doUpdate();
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# Commit after every update to prevent lock contention
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if ( $dbw->trxLevel() ) {
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$dbw->commit();
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}
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}
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wfProfileOut( 'MediaWiki::doUpdates' );
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}
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/**
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* Do a job from the job queue
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*/
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function doJobs() {
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global $wgJobRunRate;
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if ( $wgJobRunRate <= 0 || wfReadOnly() ) {
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return;
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}
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if ( $wgJobRunRate < 1 ) {
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$max = mt_getrandmax();
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if ( mt_rand( 0, $max ) > $max * $wgJobRunRate ) {
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return;
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}
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$n = 1;
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} else {
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$n = intval( $wgJobRunRate );
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}
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while ( $n-- && false != ($job = Job::pop())) {
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$output = $job->toString() . "\n";
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$t = -wfTime();
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$success = $job->run();
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$t += wfTime();
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$t = round( $t*1000 );
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if ( !$success ) {
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$output .= "Error: " . $job->getLastError() . ", Time: $t ms\n";
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} else {
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$output .= "Success, Time: $t ms\n";
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}
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wfDebugLog( 'jobqueue', $output );
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}
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}
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/**
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* Ends this task peacefully
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*/
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function restInPeace ( &$loadBalancer ) {
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wfLogProfilingData();
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$loadBalancer->closeAll();
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wfDebug( "Request ended normally\n" );
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}
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/**
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* Perform one of the "standard" actions
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*/
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function performAction( &$output, &$article, &$title, &$user, &$request ) {
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wfProfileIn( 'MediaWiki::performAction' );
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$action = $this->getVal('Action');
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if( in_array( $action, $this->getVal('DisabledActions',array()) ) ) {
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/* No such action; this will switch to the default case */
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$action = 'nosuchaction';
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}
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switch( $action ) {
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case 'view':
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$output->setSquidMaxage( $this->getVal( 'SquidMaxage' ) );
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$article->view();
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break;
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case 'watch':
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case 'unwatch':
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case 'delete':
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case 'revert':
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case 'rollback':
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case 'protect':
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case 'unprotect':
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case 'info':
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case 'markpatrolled':
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case 'render':
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case 'deletetrackback':
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case 'purge':
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$article->$action();
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break;
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case 'print':
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$article->view();
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break;
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case 'dublincore':
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if( !$this->getVal( 'EnableDublinCoreRdf' ) ) {
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wfHttpError( 403, 'Forbidden', wfMsg( 'nodublincore' ) );
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} else {
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require_once( 'includes/Metadata.php' );
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wfDublinCoreRdf( $article );
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}
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break;
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case 'creativecommons':
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if( !$this->getVal( 'EnableCreativeCommonsRdf' ) ) {
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wfHttpError( 403, 'Forbidden', wfMsg( 'nocreativecommons' ) );
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} else {
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require_once( 'includes/Metadata.php' );
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wfCreativeCommonsRdf( $article );
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}
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break;
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case 'credits':
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require_once( 'includes/Credits.php' );
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showCreditsPage( $article );
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break;
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case 'submit':
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if( !$this->getVal( 'CommandLineMode' ) && !$request->checkSessionCookie() ) {
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/* Send a cookie so anons get talk message notifications */
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User::SetupSession();
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}
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/* Continue... */
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case 'edit':
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$internal = $request->getVal( 'internaledit' );
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$external = $request->getVal( 'externaledit' );
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$section = $request->getVal( 'section' );
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$oldid = $request->getVal( 'oldid' );
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if( !$this->getVal( 'UseExternalEditor' ) || $action=='submit' || $internal ||
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$section || $oldid || ( !$user->getOption( 'externaleditor' ) && !$external ) ) {
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$editor = new EditPage( $article );
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$editor->submit();
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} elseif( $this->getVal( 'UseExternalEditor' ) && ( $external || $user->getOption( 'externaleditor' ) ) ) {
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$mode = $request->getVal( 'mode' );
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$extedit = new ExternalEdit( $article, $mode );
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$extedit->edit();
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}
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break;
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case 'history':
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if( $_SERVER['REQUEST_URI'] == $title->getInternalURL( 'action=history' ) ) {
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$output->setSquidMaxage( $this->getVal( 'SquidMaxage' ) );
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}
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$history = new PageHistory( $article );
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$history->history();
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break;
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case 'raw':
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$raw = new RawPage( $article );
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$raw->view();
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break;
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default:
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if( wfRunHooks( 'UnknownAction', array( $action, $article ) ) ) {
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$output->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
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}
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}
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wfProfileOut( 'MediaWiki::performAction' );
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}
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}; /* End of class MediaWiki */
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?>
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