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<?php
namespace SMW\MediaWiki\Search;
use SMW\DIWikiPage;
use SMW\Utils\CharExaminer;
/**
* @ingroup SMW
*
* @licence GNU GPL v2+
* @since 2.1
*
* @author Stephan Gambke
*/
class SearchResultSet extends \SearchResultSet {
/**
* @var DIWikiPage[]|[]
*/
private $pages;
/**
* @var QueryToken
*/
private $queryToken;
/**
* @var Excerpts
*/
private $excerpts;
private $count = null;
public function __construct( \SMWQueryResult $result, $count = null ) {
$this->pages = $result->getResults();
$this->queryToken = $result->getQuery()->getQueryToken();
$this->excerpts = $result->getExcerpts();
$this->count = $count;
}
/**
* Return number of rows included in this result set.
*
* @return int|void
*/
public function numRows() {
return count( $this->pages );
}
/**
* Return true if results are included in this result set.
*
* @return bool
*/
public function hasResults() {
return $this->numRows() > 0;
}
/**
* Fetches next search result, or false.
*
* @return SearchResult
*/
public function next() {
$page = current( $this->pages );
$searchResult = false;
if ( $page instanceof DIWikiPage ) {
$searchResult = SearchResult::newFromTitle( $page->getTitle() );
}
// Attempt to use excerpts available from a different back-end
if ( $searchResult && $this->excerpts !== null ) {
if ( ( $excerpt = $this->excerpts->getExcerpt( $page ) ) !== false ) {
$searchResult->setExcerpt( $excerpt, $this->excerpts->hasHighlight() );
}
}
next( $this->pages );
return $searchResult;
}
/**
* @since 3.0
*
* @return SearchSuggestionSet
*/
public function newSearchSuggestionSet() {
$suggestions = [];
$hasMoreResults = false;
$score = count( $this->pages );
foreach ( $this->pages as $page ) {
if ( ( $title = $page->getTitle() ) && $title->exists() ) {
$suggestions[] = \SearchSuggestion::fromTitle( $score--, $title );
}
}
return new \SearchSuggestionSet( $suggestions, $hasMoreResults );
}
/**
* @see SearchResultSet::extractResults
*
* @since 3.0
*/
public function extractResults() {
// #3204
// https://github.com/wikimedia/mediawiki/commit/720fdfa7901cbba93b5695ed5f00f982272ced27
//
// MW 1.32+:
// - Remove SearchResultSet::next, SearchResultSet::numRows
// - Move QueryResult::getResults, QueryResult::getExcerpts into this
// method to avoid constructor work
if ( $this->pages === [] ) {
return $this->results = [];
}
foreach ( $this->pages as $page ) {
if ( $page instanceof DIWikiPage ) {
$searchResult = SearchResult::newFromTitle( $page->getTitle() );
}
// Attempt to use excerpts available from a different back-end
if ( $searchResult && $this->excerpts !== null ) {
if ( ( $excerpt = $this->excerpts->getExcerpt( $page ) ) !== false ) {
$searchResult->setExcerpt( $excerpt, $this->excerpts->hasHighlight() );
}
}
$this->results[] = $searchResult;
}
return $this->results;
}
/**
* Returns true, so Special:Search won't offer the user a link to a create
* a page named by the search string because the name would contain the
* search syntax, i.e. the SMW query.
*
* @return bool
*/
public function searchContainedSyntax() {
return true;
}
public function getTotalHits() {
return $this->count;
}
/**
* Return an array of regular expression fragments for matching
* the search terms as parsed by the engine in a text extract.
*
* This is a temporary hack for MW versions that can not cope
* with no search term being returned (<1.24).
*
* @deprecated remove once min supported MW version has \SearchHighlighter::highlightNone()
*
* @return string[]
*/
public function termMatches() {
if ( ( $tokens = $this->getTokens() ) !== [] ) {
return $tokens;
}
if ( method_exists( '\SearchHighlighter', 'highlightNone' ) ) {
return [];
}
// Will cause the highlighter to match every line start, thus returning the first few lines of found pages.
return [ '^' ];
}
private function getTokens() {
$tokens = [];
if ( $this->queryToken === null ) {
return $tokens;
}
// Use tokens gathered from a query context [[in:Foo]] (~~*Foo*), a filter context
// such as [[Category:Foo]] is not considered eligible to provide a
// token.
foreach ( $this->queryToken->getTokens() as $key => $value ) {
// Avoid add \b boundary checks for CJK where whitespace is not used
// as word break
$tokens[] = CharExaminer::isCJK( $key ) ? "$key" : "\b$key\b";
}
return $tokens;
}
}
|
