includes/search/SearchEngineFactory.php

   1 <?php
   2
   3 /**
   4  * Factory class for SearchEngine.
   5  * Allows to create engine of the specific type.
   6  */
   7 class SearchEngineFactory {
   8
   9         /**
  10          * Configuration for SearchEngine classes.
  11          * @var SearchEngineConfig
  12          */
  13         private $config;
  14
  15         public function __construct( SearchEngineConfig $config ) {
  16                 $this->config = $config;
  17         }
  18
  19         /**
  20          * Create SearchEngine of the given type.
  21          * @param string $type
  22          * @return SearchEngine
  23          */
  24         public function create( $type = null ) {
  25                 $dbr = null;
  26
  27                 $configType = $this->config->getSearchType();
  28                 $alternatives = $this->config->getSearchTypes();
  29
  30                 if ( $type && in_array( $type, $alternatives ) ) {
  31                         $class = $type;
  32                 } elseif ( $configType !== null ) {
  33                         $class = $configType;
  34                 } else {
  35                         $dbr = wfGetDB( DB_SLAVE );
  36                         $class = $dbr->getSearchEngine();
  37                 }
  38
  39                 $search = new $class( $dbr );
  40                 return $search;
  41         }
  42 }