Current File : /www/varak.net/wiki.varak.net/extensions/CirrusSearch/includes/Query/QueryHelper.php
<?php
namespace CirrusSearch\Query;
use CirrusSearch\Search\SearchContext;
/**
* helpers for building queries
*/
class QueryHelper {
/**
/**
* Builds a match query against $field for $title. $title is munged to make
* title matching better more intuitive for users.
*
* @param string $field field containing the title
* @param string $title title query text to match against
* @param bool $underscores If the field contains underscores instead of
* spaces. Defaults to false.
* @return \Elastica\Query\Match For matching $title to $field
*/
public static function matchPage( $field, $title, $underscores = false ) {
if ( $underscores ) {
$title = str_replace( ' ', '_', $title );
} else {
$title = str_replace( '_', ' ', $title );
}
$match = new \Elastica\Query\Match();
$match->setFieldQuery( $field, $title );
return $match;
}
/**
* Extracts syntax matching $regex from $term and applies $callback to
* the matching pieces. The callback must return a string indicating what,
* if anything, of the matching piece of $query should be retained in
* the search string. If the piece is completely removed (most common case)
* it will be injected as a prefix into any search suggestions made.
*
* @param SearchContext $context
* @param string $term The current search term
* @param string $regex An expression that matches the desired special syntax
* @param callable $callback Called on for each piece of $term that matches
* $regex. This function will be provided with $matches from
* preg_replace_callback and must return a string which will replace the
* match in $term.
* @return string The search term after extracting special syntax
*/
public static function extractSpecialSyntaxFromTerm( SearchContext $context, $term, $regex, $callback ) {
return preg_replace_callback(
$regex,
function ( $matches ) use ( $context, $callback ) {
$result = $callback( $matches );
if ( $result === '' ) {
$context->addSuggestPrefix( $matches[0] );
}
return $result;
},
$term
);
}
}
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