includes/title/MediaWikiPageLinkRenderer.php

   1 <?php
   2 /**
   3  * A service for generating links from page titles
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @license GPL 2+
  22  * @author Daniel Kinzler
  23  */
  24
  25 /**
  26  * A service for generating links from page titles.
  27  *
  28  * @see https://www.mediawiki.org/wiki/Requests_for_comment/TitleValue
  29  */
  30 class MediaWikiPageLinkRenderer implements PageLinkRenderer {
  31         /**
  32          * @var TitleFormatter
  33          */
  34         protected $formatter;
  35
  36         /**
  37          * @var string
  38          */
  39         protected $baseUrl;
  40
  41         /**
  42          * @note $formatter and $baseUrl are currently not used for generating links,
  43          * since we still rely on the Linker class to generate the actual HTML.
  44          * Once this is reversed so that  Linker becomes a legacy interface to
  45          * HtmlPageLinkRenderer, we will be using them, so it seems prudent to
  46          * already declare the dependency and inject them.
  47          *
  48          * @param TitleFormatter $formatter Formatter for generating the target title string
  49          * @param string $baseUrl (currently unused, pending refactoring of Linker).
  50          *        Defaults to $wgArticlePath.
  51          */
  52         public function __construct( TitleFormatter $formatter, $baseUrl = null ) {
  53                 if ( $baseUrl === null ) {
  54                         $baseUrl = $GLOBALS['wgArticlePath'];
  55                 }
  56
  57                 $this->formatter = $formatter;
  58                 $this->baseUrl = $baseUrl;
  59         }
  60
  61         /**
  62          * Returns the (partial) URL for the given page (including any section identifier).
  63          *
  64          * @param TitleValue $page The link's target
  65          * @param array $params Any additional URL parameters.
  66          *
  67          * @return string
  68          */
  69         public function getPageUrl( TitleValue $page, $params = array() ) {
  70                 //TODO: move the code from Linker::linkUrl here!
  71                 //The below is just a rough estimation!
  72
  73                 $name = $this->formatter->getPrefixedText( $page );
  74                 $name = str_replace( ' ', '_', $name );
  75                 $name = wfUrlencode( $name );
  76
  77                 $url = $this->baseUrl . $name;
  78
  79                 if ( $params ) {
  80                         $separator = ( strpos( $url, '?' ) ) ? '&' : '?';
  81                         $url .= $separator . wfArrayToCgi( $params );
  82                 }
  83
  84                 $fragment = $page->getFragment();
  85                 if ( $fragment !== '' ) {
  86                         $url = $url . '#' . wfUrlencode( $fragment );
  87                 }
  88
  89                 return $url;
  90         }
  91
  92         /**
  93          * Returns an HTML link to the given page, using the given surface text.
  94          *
  95          * @param TitleValue $page The link's target
  96          * @param string $text The link's surface text (will be derived from $page if not given).
  97          *
  98          * @return string
  99          */
 100         public function renderHtmlLink( TitleValue $page, $text = null ) {
 101                 if ( $text === null ) {
 102                         $text = $this->formatter->getFullText( $page );
 103                 }
 104
 105                 // TODO: move the logic implemented by Linker here,
 106                 // using $this->formatter and $this->baseUrl, and
 107                 // re-implement Linker to use a HtmlPageLinkRenderer.
 108                 $title = Title::newFromTitleValue( $page );
 109                 $link = Linker::link( $title, htmlspecialchars( $text ) );
 110
 111                 return $link;
 112         }
 113
 114         /**
 115          * Returns a wikitext link to the given page, using the given surface text.
 116          *
 117          * @param TitleValue $page The link's target
 118          * @param string $text The link's surface text (will be derived from $page if not given).
 119          *
 120          * @return string
 121          */
 122         public function renderWikitextLink( TitleValue $page, $text = null ) {
 123                 if ( $text === null ) {
 124                         $text = $this->formatter->getFullText( $page );
 125                 }
 126
 127                 $name = $this->formatter->getFullText( $page );
 128
 129                 return '[[:' . $name . '|' . wfEscapeWikiText( $text ) . ']]';
 130         }
 131 }