includes/filerepo/ForeignAPIRepo.php

   1 <?php
   2
   3 /**
   4  * A foreign repository with a remote MediaWiki with an API thingy
   5  * Very hacky and inefficient
   6  * do not use except for testing :D
   7  *
   8  * Example config:
   9  *
  10  * $wgForeignFileRepos[] = array(
  11  *   'class'            => 'ForeignAPIRepo',
  12  *   'name'             => 'shared',
  13  *   'apibase'          => 'http://en.wikipedia.org/w/api.php',
  14  *   'fetchDescription' => true, // Optional
  15  * );
  16  *
  17  * @ingroup FileRepo
  18  */
  19 class ForeignAPIRepo extends FileRepo {
  20         var $fileFactory = array( 'ForeignAPIFile', 'newFromTitle' );
  21         protected $mQueryCache = array();
  22
  23         function __construct( $info ) {
  24                 parent::__construct( $info );
  25                 $this->mApiBase = $info['apibase']; // http://commons.wikimedia.org/w/api.php
  26                 if( !$this->scriptDirUrl ) {
  27                         // hack for description fetches
  28                         $this->scriptDirUrl = dirname( $this->mApiBase );
  29                 }
  30         }
  31
  32         function storeBatch( $triplets, $flags = 0 ) {
  33                 return false;
  34         }
  35
  36         function storeTemp( $originalName, $srcPath ) {
  37                 return false;
  38         }
  39         function publishBatch( $triplets, $flags = 0 ) {
  40                 return false;
  41         }
  42         function deleteBatch( $sourceDestPairs ) {
  43                 return false;
  44         }
  45         function getFileProps( $virtualUrl ) {
  46                 return false;
  47         }
  48
  49         protected function queryImage( $query ) {
  50                 $data = $this->fetchImageQuery( $query );
  51
  52                 if( isset( $data['query']['pages'] ) ) {
  53                         foreach( $data['query']['pages'] as $pageid => $info ) {
  54                                 if( isset( $info['imageinfo'][0] ) ) {
  55                                         return $info['imageinfo'][0];
  56                                 }
  57                         }
  58                 }
  59                 return false;
  60         }
  61
  62         protected function fetchImageQuery( $query ) {
  63                 global $wgMemc;
  64
  65                 $url = $this->mApiBase .
  66                         '?' .
  67                         wfArrayToCgi(
  68                                 array_merge( $query,
  69                                         array(
  70                                                 'format' => 'json',
  71                                                 'action' => 'query',
  72                                                 'prop' => 'imageinfo' ) ) );
  73
  74                 if( !isset( $this->mQueryCache[$url] ) ) {
  75                         $key = wfMemcKey( 'ForeignAPIRepo', $url );
  76                         $data = $wgMemc->get( $key );
  77                         if( !$data ) {
  78                                 $data = Http::get( $url );
  79                                 $wgMemc->set( $key, $data, 3600 );
  80                         }
  81
  82                         if( count( $this->mQueryCache ) > 100 ) {
  83                                 // Keep the cache from growing infinitely
  84                                 $this->mQueryCache = array();
  85                         }
  86                         $this->mQueryCache[$url] = $data;
  87                 }
  88                 return json_decode( $this->mQueryCache[$url], true );
  89         }
  90
  91         function getImageInfo( $title, $time = false ) {
  92                 return $this->queryImage( array(
  93                         'titles' => 'Image:' . $title->getText(),
  94                         'iiprop' => 'timestamp|user|comment|url|size|sha1|metadata|mime' ) );
  95         }
  96
  97         function getThumbUrl( $name, $width=-1, $height=-1 ) {
  98                 $info = $this->queryImage( array(
  99                         'titles' => 'Image:' . $name,
 100                         'iiprop' => 'url',
 101                         'iiurlwidth' => $width,
 102                         'iiurlheight' => $height ) );
 103                 if( $info ) {
 104                         return $info['thumburl'];
 105                 } else {
 106                         return false;
 107                 }
 108         }
 109 }