includes/WikiMap.php

   1 <?php
   2 /**
   3  * Tools for dealing with other locally-hosted wikis.
   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  */
  22
  23 /**
  24  * Helper tools for dealing with other locally-hosted wikis
  25  */
  26 class WikiMap {
  27
  28         /**
  29          * Get a WikiReference object for $wikiID
  30          *
  31          * @param string $wikiID Wiki'd id (generally database name)
  32          * @return WikiReference|null WikiReference object or null if the wiki was not found
  33          */
  34         public static function getWiki( $wikiID ) {
  35                 global $wgConf;
  36
  37                 $wgConf->loadFullData();
  38
  39                 list( $major, $minor ) = $wgConf->siteFromDB( $wikiID );
  40                 if ( $major === null ) {
  41                         return null;
  42                 }
  43                 $server = $wgConf->get( 'wgServer', $wikiID, $major,
  44                         array( 'lang' => $minor, 'site' => $major ) );
  45
  46                 $canonicalServer = $wgConf->get( 'wgCanonicalServer', $wikiID, $major,
  47                         array( 'lang' => $minor, 'site' => $major ) );
  48                 if ( $canonicalServer === false || $canonicalServer === null ) {
  49                         $canonicalServer = $server;
  50                 }
  51
  52                 $path = $wgConf->get( 'wgArticlePath', $wikiID, $major,
  53                         array( 'lang' => $minor, 'site' => $major ) );
  54                 return new WikiReference( $canonicalServer, $path, $server );
  55         }
  56
  57         /**
  58          * Convenience to get the wiki's display name
  59          *
  60          * @todo We can give more info than just the wiki id!
  61          * @param string $wikiID Wiki'd id (generally database name)
  62          * @return string|int Wiki's name or $wiki_id if the wiki was not found
  63          */
  64         public static function getWikiName( $wikiID ) {
  65                 $wiki = WikiMap::getWiki( $wikiID );
  66
  67                 if ( $wiki ) {
  68                         return $wiki->getDisplayName();
  69                 }
  70                 return $wikiID;
  71         }
  72
  73         /**
  74          * Convenience to get a link to a user page on a foreign wiki
  75          *
  76          * @param string $wikiID Wiki'd id (generally database name)
  77          * @param string $user User name (must be normalised before calling this function!)
  78          * @param string $text Link's text; optional, default to "User:$user"
  79          * @return string HTML link or false if the wiki was not found
  80          */
  81         public static function foreignUserLink( $wikiID, $user, $text = null ) {
  82                 return self::makeForeignLink( $wikiID, "User:$user", $text );
  83         }
  84
  85         /**
  86          * Convenience to get a link to a page on a foreign wiki
  87          *
  88          * @param string $wikiID Wiki'd id (generally database name)
  89          * @param string $page Page name (must be normalised before calling this function!)
  90          * @param string $text Link's text; optional, default to $page
  91          * @return string HTML link or false if the wiki was not found
  92          */
  93         public static function makeForeignLink( $wikiID, $page, $text = null ) {
  94                 if ( !$text ) {
  95                         $text = $page;
  96                 }
  97
  98                 $url = self::getForeignURL( $wikiID, $page );
  99                 if ( $url === false ) {
 100                         return false;
 101                 }
 102
 103                 return Linker::makeExternalLink( $url, $text );
 104         }
 105
 106         /**
 107          * Convenience to get a url to a page on a foreign wiki
 108          *
 109          * @param string $wikiID Wiki'd id (generally database name)
 110          * @param string $page Page name (must be normalised before calling this function!)
 111          * @param string|null $fragmentId
 112          *
 113          * @return string|bool URL or false if the wiki was not found
 114          */
 115         public static function getForeignURL( $wikiID, $page, $fragmentId = null ) {
 116                 $wiki = WikiMap::getWiki( $wikiID );
 117
 118                 if ( $wiki ) {
 119                         return $wiki->getFullUrl( $page, $fragmentId );
 120                 }
 121
 122                 return false;
 123         }
 124 }
 125
 126 /**
 127  * Reference to a locally-hosted wiki
 128  */
 129 class WikiReference {
 130         private $mCanonicalServer; ///< canonical server URL, e.g. 'https://www.mediawiki.org'
 131         private $mServer; ///< server URL, may be protocol-relative, e.g. '//www.mediawiki.org'
 132         private $mPath;   ///< path, '/wiki/$1'
 133
 134         /**
 135          * @param string $canonicalServer
 136          * @param string $path
 137          * @param null|string $server
 138          */
 139         public function __construct( $canonicalServer, $path, $server = null ) {
 140                 $this->mCanonicalServer = $canonicalServer;
 141                 $this->mPath = $path;
 142                 $this->mServer = $server === null ? $canonicalServer : $server;
 143         }
 144
 145         /**
 146          * Get the URL in a way to be displayed to the user
 147          * More or less Wikimedia specific
 148          *
 149          * @return string
 150          */
 151         public function getDisplayName() {
 152                 $parsed = wfParseUrl( $this->mCanonicalServer );
 153                 if ( $parsed ) {
 154                         return $parsed['host'];
 155                 } else {
 156                         // Invalid server spec.
 157                         // There's no sane thing to do here, so just return the canonical server name in full.
 158                         return $this->mCanonicalServer;
 159                 }
 160         }
 161
 162         /**
 163          * Helper function for getUrl()
 164          *
 165          * @todo FIXME: This may be generalized...
 166          *
 167          * @param string $page Page name (must be normalised before calling this function!
 168          *  May contain a section part.)
 169          * @param string|null $fragmentId
 170          *
 171          * @return string relative URL, without the server part.
 172          */
 173         private function getLocalUrl( $page, $fragmentId = null ) {
 174                 $page = wfUrlEncode( str_replace( ' ', '_', $page ) );
 175
 176                 if ( is_string( $fragmentId ) && $fragmentId !== '' ) {
 177                         $page .= '#' . wfUrlEncode( $fragmentId );
 178                 }
 179
 180                 return str_replace( '$1', $page, $this->mPath );
 181         }
 182
 183         /**
 184          * Get a canonical (i.e. based on $wgCanonicalServer) URL to a page on this foreign wiki
 185          *
 186          * @param string $page Page name (must be normalised before calling this function!)
 187          * @param string|null $fragmentId
 188          *
 189          * @return string Url
 190          */
 191         public function getCanonicalUrl( $page, $fragmentId = null ) {
 192                 return $this->mCanonicalServer . $this->getLocalUrl( $page, $fragmentId );
 193         }
 194
 195         /**
 196          * Get a canonical server URL
 197          * @return string
 198          */
 199         public function getCanonicalServer() {
 200                 return $this->mCanonicalServer;
 201         }
 202
 203         /**
 204          * Alias for getCanonicalUrl(), for backwards compatibility.
 205          * @param string $page
 206          * @param string|null $fragmentId
 207          *
 208          * @return string
 209          */
 210         public function getUrl( $page, $fragmentId = null ) {
 211                 return $this->getCanonicalUrl( $page, $fragmentId );
 212         }
 213
 214         /**
 215          * Get a URL based on $wgServer, like Title::getFullURL() would produce
 216          * when called locally on the wiki.
 217          *
 218          * @param string $page Page name (must be normalized before calling this function!)
 219          * @param string|null $fragmentId
 220          *
 221          * @return string URL
 222          */
 223         public function getFullUrl( $page, $fragmentId = null ) {
 224                 return $this->mServer .
 225                         $this->getLocalUrl( $page, $fragmentId );
 226         }
 227 }