Current File : /www/varak.net/wiki.varak.net/extensions/CirrusSearch/includes/Query/PrefixFeature.php
<?php
namespace CirrusSearch\Query;
use CirrusSearch;
use CirrusSearch\Connection;
use CirrusSearch\Search\SearchContext;
/**
* Handles the prefix: keyword for matching titles. Can be used to
* specify a namespace, a prefix of the title, or both. Note that
* unlike other keyword features this greedily uses everything after
* the prefix: keyword, so must be used at the end of the query. Also
* note that this will override namespace filters previously applied
* to the SearchContext.
*
* Examples:
* prefix:Calif
* prefix:Talk:
* prefix:Talk:Calif
* prefix:California Cou
* prefix:"California Cou"
*/
class PrefixFeature implements KeywordFeature {
/**
* @var Connection
*/
private $connection;
public function __construct( Connection $conn ) {
$this->connection = $conn;
}
/**
* @param SearchContext $context
* @param string $term
* @return string
*/
public function apply( SearchContext $context, $term ) {
$prefixPos = strpos( $term, 'prefix:' );
if ( $prefixPos === false ) {
return $term;
}
$value = substr( $term, 7 + $prefixPos );
// Trim quotes in case the user wanted to quote the prefix
$value = trim( $value, '"' );
if ( strlen( $value ) === 0 ) {
return $term;
}
$context->addSyntaxUsed( 'prefix' );
$context->addSuggestSuffix( ' prefix:' . $value );
// Suck namespaces out of $value. Note that this overrides provided
// namespace filters.
$cirrusSearchEngine = new CirrusSearch();
$cirrusSearchEngine->setConnection( $this->connection );
$value = trim( $cirrusSearchEngine->replacePrefixes( $value ) );
$context->setNamespaces( $cirrusSearchEngine->namespaces );
// If the namespace prefix wasn't the entire prefix filter then add a filter for the title
if ( strpos( $value, ':' ) !== strlen( $value ) - 1 ) {
$value = str_Replace( '_', ' ', $value );
$prefixQuery = new \Elastica\Query\Match();
$prefixQuery->setFieldQuery( 'title.prefix', $value );
$context->addFilter( $prefixQuery );
}
return substr( $term, 0, max( 0, $prefixPos - 1 ) );
}
}
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