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  *   'descriptionCacheExpiry' => 3600,
  16  * );
  17  *
  18  * @ingroup FileRepo
  19  */
  20 class ForeignAPIRepo extends FileRepo {
  21         var $fileFactory = array( 'ForeignAPIFile', 'newFromTitle' );
  22         protected $mQueryCache = array();
  23
  24         function __construct( $info ) {
  25                 parent::__construct( $info );
  26                 $this->mApiBase = $info['apibase']; // http://commons.wikimedia.org/w/api.php
  27                 if( !$this->scriptDirUrl ) {
  28                         // hack for description fetches
  29                         $this->scriptDirUrl = dirname( $this->mApiBase );
  30                 }
  31         }
  32
  33         function storeBatch( $triplets, $flags = 0 ) {
  34                 return false;
  35         }
  36
  37         function storeTemp( $originalName, $srcPath ) {
  38                 return false;
  39         }
  40         function publishBatch( $triplets, $flags = 0 ) {
  41                 return false;
  42         }
  43         function deleteBatch( $sourceDestPairs ) {
  44                 return false;
  45         }
  46         function getFileProps( $virtualUrl ) {
  47                 return false;
  48         }
  49
  50         protected function queryImage( $query ) {
  51                 $data = $this->fetchImageQuery( $query );
  52
  53                 if( isset( $data['query']['pages'] ) ) {
  54                         foreach( $data['query']['pages'] as $pageid => $info ) {
  55                                 if( isset( $info['imageinfo'][0] ) ) {
  56                                         return $info['imageinfo'][0];
  57                                 }
  58                         }
  59                 }
  60                 return false;
  61         }
  62
  63         protected function fetchImageQuery( $query ) {
  64                 global $wgMemc;
  65
  66                 $url = $this->mApiBase .
  67                         '?' .
  68                         wfArrayToCgi(
  69                                 array_merge( $query,
  70                                         array(
  71                                                 'format' => 'json',
  72                                                 'action' => 'query',
  73                                                 'prop' => 'imageinfo' ) ) );
  74
  75                 if( !isset( $this->mQueryCache[$url] ) ) {
  76                         $key = wfMemcKey( 'ForeignAPIRepo', $url );
  77                         $data = $wgMemc->get( $key );
  78                         if( !$data ) {
  79                                 $data = Http::get( $url );
  80                                 $wgMemc->set( $key, $data, 3600 );
  81                         }
  82
  83                         if( count( $this->mQueryCache ) > 100 ) {
  84                                 // Keep the cache from growing infinitely
  85                                 $this->mQueryCache = array();
  86                         }
  87                         $this->mQueryCache[$url] = $data;
  88                 }
  89                 return json_decode( $this->mQueryCache[$url], true );
  90         }
  91
  92         function getImageInfo( $title, $time = false ) {
  93                 return $this->queryImage( array(
  94                         'titles' => 'Image:' . $title->getText(),
  95                         'iiprop' => 'timestamp|user|comment|url|size|sha1|metadata|mime' ) );
  96         }
  97
  98         function getThumbUrl( $name, $width=-1, $height=-1 ) {
  99                 $info = $this->queryImage( array(
 100                         'titles' => 'Image:' . $name,
 101                         'iiprop' => 'url',
 102                         'iiurlwidth' => $width,
 103                         'iiurlheight' => $height ) );
 104                 if( $info ) {
 105                         return $info['thumburl'];
 106                 } else {
 107                         return false;
 108                 }
 109         }
 110 }