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<?php
namespace SMW\MediaWiki\Connection;
/**
* https://phabricator.wikimedia.org/T147550
*
* The contract of the Database interface has changed in MW 1.28 and introduced
* incompatibilities which this class tries to bypass.
*
* @license GNU GPL v2+
* @since 2.5
*
* @author mwjames
*/
class OptionsBuilder {
/**
* @since 3.0
*
* @return string
*/
public static function toString( array $options ) {
$string = '';
if ( isset( $options['GROUP BY'] ) ) {
$string .= ' GROUP BY ' . ( is_array( $options['GROUP BY'] ) ? implode( ',', $options['GROUP BY'] ) : $options['GROUP BY'] );
}
$string .= self::makeOrderBy( $options );
if ( isset( $options['LIMIT'] ) ) {
$string .= ' LIMIT ' . $options['LIMIT'];
}
if ( isset( $options['OFFSET'] ) ) {
$string .= ' OFFSET ' . $options['OFFSET'];
}
return $string;
}
/**
* @see Database::makeSelectOptions
*/
public static function makeSelectOptions( Database $connection, $options ) {
$preLimitTail = $postLimitTail = '';
$startOpts = '';
$noKeyOptions = [];
foreach ( $options as $key => $option ) {
if ( is_numeric( $key ) ) {
$noKeyOptions[$option] = true;
}
}
$preLimitTail .= self::makeGroupByWithHaving( $connection, $options );
$preLimitTail .= self::makeOrderBy( $options );
// if (isset($options['LIMIT'])) {
// $tailOpts .= $this->limitResult('', $options['LIMIT'],
// isset($options['OFFSET']) ? $options['OFFSET']
// : false);
// }
if ( isset( $noKeyOptions['FOR UPDATE'] ) ) {
$postLimitTail .= ' FOR UPDATE';
}
if ( isset( $noKeyOptions['LOCK IN SHARE MODE'] ) ) {
$postLimitTail .= ' LOCK IN SHARE MODE';
}
if ( isset( $noKeyOptions['DISTINCT'] ) || isset( $noKeyOptions['DISTINCTROW'] ) ) {
$startOpts .= 'DISTINCT';
}
# Various MySQL extensions
if ( isset( $noKeyOptions['STRAIGHT_JOIN'] ) ) {
$startOpts .= ' /*! STRAIGHT_JOIN */';
}
if ( isset( $noKeyOptions['HIGH_PRIORITY'] ) ) {
$startOpts .= ' HIGH_PRIORITY';
}
if ( isset( $noKeyOptions['SQL_BIG_RESULT'] ) ) {
$startOpts .= ' SQL_BIG_RESULT';
}
if ( isset( $noKeyOptions['SQL_BUFFER_RESULT'] ) ) {
$startOpts .= ' SQL_BUFFER_RESULT';
}
if ( isset( $noKeyOptions['SQL_SMALL_RESULT'] ) ) {
$startOpts .= ' SQL_SMALL_RESULT';
}
if ( isset( $noKeyOptions['SQL_CALC_FOUND_ROWS'] ) ) {
$startOpts .= ' SQL_CALC_FOUND_ROWS';
}
if ( isset( $noKeyOptions['SQL_CACHE'] ) ) {
$startOpts .= ' SQL_CACHE';
}
if ( isset( $noKeyOptions['SQL_NO_CACHE'] ) ) {
$startOpts .= ' SQL_NO_CACHE';
}
$useIndex = '';
$ignoreIndex = '';
return [ $startOpts, $useIndex, $preLimitTail, $postLimitTail, $ignoreIndex ];
}
protected static function makeGroupByWithHaving( $connection, $options ) {
$sql = '';
if ( isset( $options['GROUP BY'] ) ) {
$gb = is_array( $options['GROUP BY'] )
? implode( ',', $options['GROUP BY'] )
: $options['GROUP BY'];
$sql .= ' GROUP BY ' . $gb;
}
if ( isset( $options['HAVING'] ) ) {
$having = is_array( $options['HAVING'] )
? $connection->makeList( $options['HAVING'], self::LIST_AND )
: $options['HAVING'];
$sql .= ' HAVING ' . $having;
}
return $sql;
}
protected static function makeOrderBy( $options ) {
if ( isset( $options['ORDER BY'] ) ) {
$ob = is_array( $options['ORDER BY'] )
? implode( ',', $options['ORDER BY'] )
: $options['ORDER BY'];
return ' ORDER BY ' . $ob;
}
return '';
}
}
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