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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * File holding the Lingo\Backend class  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * This file is part of the MediaWiki extension Lingo.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @copyright 2011 - 2016, Stephan Gambke  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @license   GNU General Public License, version 2 (or any later version)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * The Lingo extension is free software: you can redistribute it and/or modify  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * it under the terms of the GNU General Public License as published by the Free  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Software Foundation; either version 2 of the License, or (at your option) any  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * later version.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * The Lingo extension is distributed in the hope that it will be useful, but  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * details.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * You should have received a copy of the GNU General Public License along  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * with this program. If not, see <http://www.gnu.org/licenses/>.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @author Stephan Gambke  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @file  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @ingroup Lingo  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace Lingo;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use ApprovedRevs;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Page;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Parser;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use ParserOptions;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Revision;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Title;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use User;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * The Lingo\BasicBackend class.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @ingroup Lingo  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class BasicBackend extends Backend { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	protected $mArticleLines = array();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * Lingo\BasicBackend constructor.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @param MessageLog|null $messages  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                	 */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                	public function __construct( MessageLog &$messages = null ) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                		global $wgexLingoPage, $wgRequest;  | 
            
                            
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                		$page = $wgexLingoPage ? $wgexLingoPage : wfMessage( 'lingo-terminologypagename' )->inContentLanguage()->text();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		parent::__construct( $messages );  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		// Get Terminology page  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		$title = Title::newFromText( $page );  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		if ( $title->getInterwiki() ) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                			$this->getMessageLog()->addError( wfMessage( 'lingo-terminologypagenotlocal', $page )->inContentLanguage()->text() );  | 
            
            
                                                                        
                            
            
                                    
            
            
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                			return;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		// FIXME: This is a hack special-casing the submitting of the terminology  | 
            
                            
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                		// page itself. In this case the Revision is not up to date when we get  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		// here, i.e. $rev->getText() would return outdated Test.  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		// This hack takes the text directly out of the data from the web request.  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		if ( $wgRequest->getVal( 'action', 'view' ) === 'submit'  | 
            
            
                                                                        
                            
            
                                    
            
            
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                			&& Title::newFromText( $wgRequest->getVal( 'title' ) )->getArticleID() === $title->getArticleID()  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                			$content = $wgRequest->getVal( 'wpTextbox1' );  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		} else { | 
            
            
                                                                        
                            
            
                                    
            
            
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                			$rev = $this->getRevision( $title );  | 
            
            
                                                                        
                            
            
                                    
            
            
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                			if ( !$rev ) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                				$this->getMessageLog()->addWarning( wfMessage( 'lingo-noterminologypage', $page )->inContentLanguage()->text() );  | 
            
            
                                                                        
                            
            
                                    
            
            
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                				return false;  | 
            
                            
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                			}  | 
            
            
                                                                        
                            
            
                                    
            
            
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                			$content = $rev->getText();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		$parser = new Parser;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		// expand templates and variables in the text, producing valid, static wikitext  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		// have to use a new anonymous user to avoid any leakage as Lingo is caching only one user-independant glossary  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		$content = $parser->preprocess( $content, $title, new ParserOptions( new User() ) );  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		$this->mArticleLines = array_reverse( explode( "\n", $content ) );  | 
            
            
                                                                        
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * This function returns the next element. The element is an array of four  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * strings: Term, Definition, Link, Source. For the Lingo\BasicBackend Link  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * and Source are set to null. If there is no next element the function  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * returns null.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @return Array | null  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	public function next() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		wfProfileIn( __METHOD__ );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		static $term = null;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		static $definitions = array();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		static $ret = array();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		// find next valid line (yes, the assignation is intended)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		while ( ( count( $ret ) == 0 ) && ( $entry = each( $this->mArticleLines ) ) ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			if ( empty( $entry[ 1 ] ) || ( $entry[ 1 ][ 0 ] !== ';' && $entry[ 1 ][ 0 ] !== ':' ) ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				continue;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$chunks = explode( ':', $entry[ 1 ], 2 );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			// found a new definition?  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			if ( count( $chunks ) == 2 ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				// wipe the data if its a totaly new term definition  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				if ( !empty( $term ) && count( $definitions ) > 0 ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					$definitions = array();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					$term = null;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				$definitions[] = trim( $chunks[ 1 ] );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    131
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    132
                 | 
                                    
                                                     | 
                
                 | 
                			// found a new term?  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    133
                 | 
                                    
                                                     | 
                
                 | 
                			if ( count( $chunks ) >= 1 && strlen( $chunks[ 0 ] ) >= 1 ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    134
                 | 
                                    
                                                     | 
                
                 | 
                				$term = trim( substr( $chunks[ 0 ], 1 ) );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    135
                 | 
                                    
                                                     | 
                
                 | 
                			}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    136
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    137
                 | 
                                    
                                                     | 
                
                 | 
                			if ( $term !== null ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    138
                 | 
                                    
                                                     | 
                
                 | 
                				foreach ( $definitions as $definition ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    139
                 | 
                                    
                                                     | 
                
                 | 
                					$ret[] = array(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    140
                 | 
                                    
                                                     | 
                
                 | 
                						Element::ELEMENT_TERM       => $term,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    141
                 | 
                                    
                                                     | 
                
                 | 
                						Element::ELEMENT_DEFINITION => $definition,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    142
                 | 
                                    
                                                     | 
                
                 | 
                						Element::ELEMENT_LINK       => null,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    143
                 | 
                                    
                                                     | 
                
                 | 
                						Element::ELEMENT_SOURCE     => null  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    144
                 | 
                                    
                                                     | 
                
                 | 
                					);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    145
                 | 
                                    
                                                     | 
                
                 | 
                				}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    146
                 | 
                                    
                                                     | 
                
                 | 
                			}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    147
                 | 
                                    
                                                     | 
                
                 | 
                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    148
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    149
                 | 
                                    
                                                     | 
                
                 | 
                		wfProfileOut( __METHOD__ );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    150
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    151
                 | 
                                    
                                                     | 
                
                 | 
                		return array_pop( $ret );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    152
                 | 
                                    
                                                     | 
                
                 | 
                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    153
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    154
                 | 
                                    
                                                     | 
                
                 | 
                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    155
                 | 
                                    
                                                     | 
                
                 | 
                	 * Returns revision of the terms page.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    156
                 | 
                                    
                                                     | 
                
                 | 
                	 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    157
                 | 
                                    
                                                     | 
                
                 | 
                	 * @param Title $title  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    158
                 | 
                                    
                                                     | 
                
                 | 
                	 * @return Revision  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    159
                 | 
                                    
                                                     | 
                
                 | 
                	 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    160
                 | 
                                    
                                                     | 
                
                 | 
                	public function getRevision( $title ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    161
                 | 
                                    
                                                     | 
                
                 | 
                		global $wgexLingoEnableApprovedRevs;  | 
            
                            
                    | 
                        
                     | 
                     | 
                     | 
                    
                                                                                                    
                        
                         
                                                                                        
                                                                                     
                     | 
                
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    162
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    163
                 | 
                                    
                                                     | 
                
                 | 
                		if ( $wgexLingoEnableApprovedRevs ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    164
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    165
                 | 
                                    
                                                     | 
                
                 | 
                			if ( defined( 'APPROVED_REVS_VERSION' ) ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    166
                 | 
                                    
                                                     | 
                
                 | 
                				$rev_id = ApprovedRevs::getApprovedRevID( $title );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    167
                 | 
                                    
                                                     | 
                
                 | 
                				return Revision::newFromId( $rev_id );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    168
                 | 
                                    
                                                     | 
                
                 | 
                			} else { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    169
                 | 
                                    
                                                     | 
                
                 | 
                				wfDebug( 'Support for ApprovedRevs is enabled in Lingo. But ApprovedRevs was not found.\n' );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    170
                 | 
                                    
                                                     | 
                
                 | 
                			}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    171
                 | 
                                    
                                                     | 
                
                 | 
                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    172
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    173
                 | 
                                    
                                                     | 
                
                 | 
                		return Revision::newFromTitle( $title );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    174
                 | 
                                    
                                                     | 
                
                 | 
                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    175
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    176
                 | 
                                    
                                                     | 
                
                 | 
                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    177
                 | 
                                    
                                                     | 
                
                 | 
                	 * Initiates the purging of the cache when the Terminology page was saved or purged.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    178
                 | 
                                    
                                                     | 
                
                 | 
                	 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    179
                 | 
                                    
                                                     | 
                
                 | 
                	 * @param Page $wikipage  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    180
                 | 
                                    
                                                     | 
                
                 | 
                	 * @return Bool  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    181
                 | 
                                    
                                                     | 
                
                 | 
                	 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    182
                 | 
                                    
                                                     | 
                
                 | 
                	public static function purgeCache( &$wikipage ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    183
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    184
                 | 
                                    
                                                     | 
                
                 | 
                		global $wgexLingoPage;  | 
            
                            
                    | 
                        
                     | 
                     | 
                     | 
                    
                                                                                                    
                        
                         
                                                                                        
                                                                                     
                     | 
                
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    185
                 | 
                                    
                                                     | 
                
                 | 
                		$page = $wgexLingoPage ? $wgexLingoPage : wfMessage( 'lingo-terminologypagename' )->inContentLanguage()->text();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    186
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    187
                 | 
                                    
                                                     | 
                
                 | 
                		if ( !is_null( $wikipage ) && ( $wikipage->getTitle()->getText() === $page ) ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    188
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    189
                 | 
                                    
                                                     | 
                
                 | 
                			LingoParser::purgeCache();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    190
                 | 
                                    
                                                     | 
                
                 | 
                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    191
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    192
                 | 
                                    
                                                     | 
                
                 | 
                		return true;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    193
                 | 
                                    
                                                     | 
                
                 | 
                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    194
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    195
                 | 
                                    
                                                     | 
                
                 | 
                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    196
                 | 
                                    
                                                     | 
                
                 | 
                	 * The basic backend is cache-enabled so this function returns true.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    197
                 | 
                                    
                                                     | 
                
                 | 
                	 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    198
                 | 
                                    
                                                     | 
                
                 | 
                	 * Actual caching is done by the parser, the backend just calls  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    199
                 | 
                                    
                                                     | 
                
                 | 
                	 * Lingo\LingoParser::purgeCache when necessary.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    200
                 | 
                                    
                                                     | 
                
                 | 
                	 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    201
                 | 
                                    
                                                     | 
                
                 | 
                	 * @return boolean  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    202
                 | 
                                    
                                                     | 
                
                 | 
                	 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    203
                 | 
                                    
                                                     | 
                
                 | 
                	public function useCache() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    204
                 | 
                                    
                                                     | 
                
                 | 
                		return true;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    205
                 | 
                                    
                                                     | 
                
                 | 
                	}  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
                | 
                    206
                 | 
                                    
                                                     | 
                
                 | 
                }  | 
            
            
                                                        
            
                                    
            
            
                | 
                    207
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                        
Instead of relying on
globalstate, we recommend one of these alternatives:1. Pass all data via parameters
2. Create a class that maintains your state