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<?php
declare( strict_types = 1 );
namespace MediaWiki\Extension\Translate\Statistics;
use stdClass;
/**
* Interface for producing different kinds of graphs.
* The graphs are based on data queried from the database.
*
* @ingroup Stats
* @license GPL-2.0-or-later
* @since 2010.07
*/
interface TranslationStatsInterface {
/**
* Constructor. The implementation can access the graph options, but not
* define new ones.
* @param TranslationStatsGraphOptions $opts
*/
public function __construct( TranslationStatsGraphOptions $opts );
/**
* Query details that the graph must fill.
* @param array &$tables Empty list. Append table names.
* @param array &$fields Empty list. Append field names.
* @param array &$conds Empty array. Append select conditions.
* @param string &$type Append graph type (used to identify queries).
* @param array &$options Empty array. Append extra query options.
* @param array &$joins Empty array. Append extra join conditions.
* @param string $start Precalculated start cutoff timestamp
* @param string $end Precalculated end cutoff timestamp
*/
public function preQuery( &$tables, &$fields, &$conds, &$type, &$options, &$joins, $start, $end );
/**
* Return the indexes which this result contributes to.
* Return 'all' if only one variable is measured. Return false if none.
* @param stdClass $row Database Result Row
* @return array|false
*/
public function indexOf( $row );
/**
* Return the names of the variables being measured.
* Return 'all' if only one variable is measured. Must match indexes
* returned by indexOf() and contain them all.
* @return string[]
*/
public function labels();
/**
* Return the timestamp associated with this result row.
* @param stdClass $row Database Result Row
* @return string Timestamp.
*/
public function getTimestamp( $row );
/**
* Return time formatting string.
* @see Language::sprintfDate()
* @return string
*/
public function getDateFormat();
}
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