Current File : //www/varak.net/wiki.varak.net/extensions/CirrusSearch/includes/LanguageDetector/ElasticSearch.php
<?php
namespace CirrusSearch\LanguageDetector;
use CirrusSearch;
use Elastica\Request;
use Elastica\Exception\ResponseException;
use MediaWiki\Logger\LoggerFactory;
/**
* Try to detect language using langdetect plugin
* See: https://github.com/jprante/elasticsearch-langdetect
*/
class ElasticSearch implements Detector {
/**
* Detect language
*
* @param CirrusSearch $cirrus Searching class
* @param string $text Text to detect language
* @return string|null Preferred language, or null if none found
*/
public function detect( CirrusSearch $cirrus, $text ) {
$client = $cirrus->getConnection()->getClient();
try {
$response = $this->request( $client, $text );
} catch ( ResponseException $e ) {
// This happens when language detection is not configured
LoggerFactory::getInstance( 'CirrusSearch' )->warning(
"Could not connect to language detector: {exception}",
[ "exception" => $e ]
);
return null;
}
if ( $response->isOk() ) {
$value = $response->getData();
if ( $value && !empty( $value['languages'] ) ) {
$langs = $value['languages'];
if ( count( $langs ) == 1 ) {
// TODO: add minimal threshold
return $langs[0]['language'];
}
// FIXME: here I'm just winging it, should be something
// that makes sense for multiple languages
if ( count( $langs ) == 2) {
if( $langs[0]['probability'] > 2*$langs[1]['probability'] ) {
return $langs[0]['language'];
}
}
}
}
return null;
}
/**
* @param \Elastica\Client $client
* @param string $text
* @return \Elastica\Response
* @suppress PhanTypeMismatchArgument The third parameter is typically
* an array, but langdetect is special and takes a string instead.
*/
private function request( \Elastica\Client $client, $text ) {
return $client->request( "_langdetect", Request::POST, $text );
}
}
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