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<?php
/**
* Search result sets
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup Search
*/
/**
* @ingroup Search
*/
class SearchResultSet {
protected $containedSyntax = false;
public function __construct( $containedSyntax = false ) {
$this->containedSyntax = $containedSyntax;
}
/**
* Fetch an array of regular expression fragments for matching
* the search terms as parsed by this engine in a text extract.
* STUB
*
* @return array
*/
function termMatches() {
return array();
}
function numRows() {
return 0;
}
/**
* Some search modes return a total hit count for the query
* in the entire article database. This may include pages
* in namespaces that would not be matched on the given
* settings.
*
* Return null if no total hits number is supported.
*
* @return int
*/
function getTotalHits() {
return null;
}
/**
* Some search modes will run an alternative query that it thinks gives
* a better result than the provided search. Returns true if this has
* occured.
*
* @return bool
*/
function hasRewrittenQuery() {
return false;
}
/**
* @return string|null The search the query was internally rewritten to,
* or null when the result of the original query was returned.
*/
function getQueryAfterRewrite() {
return null;
}
/**
* @return string|null Same as self::getQueryAfterRewrite(), but in HTML
* and with changes highlighted. Null when the query was not rewritten.
*/
function getQueryAfterRewriteSnippet() {
return null;
}
/**
* Some search modes return a suggested alternate term if there are
* no exact hits. Returns true if there is one on this set.
*
* @return bool
*/
function hasSuggestion() {
return false;
}
/**
* @return string Suggested query, null if none
*/
function getSuggestionQuery() {
return null;
}
/**
* @return string HTML highlighted suggested query, '' if none
*/
function getSuggestionSnippet() {
return '';
}
/**
* Return a result set of hits on other (multiple) wikis associated with this one
*
* @return SearchResultSet
*/
function getInterwikiResults() {
return null;
}
/**
* Check if there are results on other wikis
*
* @return bool
*/
function hasInterwikiResults() {
return $this->getInterwikiResults() != null;
}
/**
* Fetches next search result, or false.
* STUB
*
* @return SearchResult
*/
function next() {
return false;
}
/**
* Frees the result set, if applicable.
*/
function free() {
// ...
}
/**
* Did the search contain search syntax? If 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.
* @return bool
*/
public function searchContainedSyntax() {
return $this->containedSyntax;
}
}
/**
* This class is used for different SQL-based search engines shipped with MediaWiki
* @ingroup Search
*/
class SqlSearchResultSet extends SearchResultSet {
protected $resultSet;
protected $terms;
protected $totalHits;
function __construct( $resultSet, $terms, $total = null ) {
$this->resultSet = $resultSet;
$this->terms = $terms;
$this->totalHits = $total;
}
function termMatches() {
return $this->terms;
}
function numRows() {
if ( $this->resultSet === false ) {
return false;
}
return $this->resultSet->numRows();
}
function next() {
if ( $this->resultSet === false ) {
return false;
}
$row = $this->resultSet->fetchObject();
if ( $row === false ) {
return false;
}
return SearchResult::newFromTitle(
Title::makeTitle( $row->page_namespace, $row->page_title )
);
}
function free() {
if ( $this->resultSet === false ) {
return false;
}
$this->resultSet->free();
}
function getTotalHits() {
if ( !is_null( $this->totalHits ) ) {
return $this->totalHits;
} else {
// Special:Search expects a number here.
return $this->numRows();
}
}
}
/**
* A SearchResultSet wrapper for SearchEngine::getNearMatch
*/
class SearchNearMatchResultSet extends SearchResultSet {
private $fetched = false;
/**
* @param Title|null $match Title if matched, else null
*/
public function __construct( $match ) {
$this->result = $match;
}
public function numRows() {
return $this->result ? 1 : 0;
}
public function next() {
if ( $this->fetched || !$this->result ) {
return false;
}
$this->fetched = true;
return SearchResult::newFromTitle( $this->result );
}
}
|
