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<?php
/**
* Admin\API\Reports\SqlQuery class file.
*/
namespace Automattic\WooCommerce\Admin\API\Reports;
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
/**
* Admin\API\Reports\SqlQuery: Common parent for manipulating SQL query clauses.
*/
class SqlQuery {
/**
* List of SQL clauses.
*
* @var array
*/
private $sql_clauses = array(
'select' => array(),
'from' => array(),
'left_join' => array(),
'join' => array(),
'right_join' => array(),
'where' => array(),
'where_time' => array(),
'group_by' => array(),
'having' => array(),
'limit' => array(),
'order_by' => array(),
'union' => array(),
);
/**
* SQL clause merge filters.
*
* @var array
*/
private $sql_filters = array(
'where' => array(
'where',
'where_time',
),
'join' => array(
'right_join',
'join',
'left_join',
),
);
/**
* Data store context used to pass to filters.
*
* @var string
*/
protected $context;
/**
* Constructor.
*
* @param string $context Optional context passed to filters. Default empty string.
*/
public function __construct( $context = '' ) {
$this->context = $context;
}
/**
* Add a SQL clause to be included when get_data is called.
*
* @param string $type Clause type.
* @param string $clause SQL clause.
*/
public function add_sql_clause( $type, $clause ) {
if ( isset( $this->sql_clauses[ $type ] ) && ! empty( $clause ) ) {
$this->sql_clauses[ $type ][] = $clause;
}
}
/**
* Get SQL clause by type.
*
* @param string $type Clause type.
* @param string $handling Whether to filter the return value (filtered|unfiltered). Default unfiltered.
*
* @return string SQL clause.
*/
protected function get_sql_clause( $type, $handling = 'unfiltered' ) {
if ( ! isset( $this->sql_clauses[ $type ] ) ) {
return '';
}
/**
* Default to bypassing filters for clause retrieval internal to data stores.
* The filters are applied when the full SQL statement is retrieved.
*/
if ( 'unfiltered' === $handling ) {
return implode( ' ', $this->sql_clauses[ $type ] );
}
if ( isset( $this->sql_filters[ $type ] ) ) {
$clauses = array();
foreach ( $this->sql_filters[ $type ] as $subset ) {
$clauses = array_merge( $clauses, $this->sql_clauses[ $subset ] );
}
} else {
$clauses = $this->sql_clauses[ $type ];
}
/**
* Filter SQL clauses by type and context.
*
* @param array $clauses The original arguments for the request.
* @param string $context The data store context.
*/
$clauses = apply_filters( "woocommerce_analytics_clauses_{$type}", $clauses, $this->context );
/**
* Filter SQL clauses by type and context.
*
* @param array $clauses The original arguments for the request.
*/
$clauses = apply_filters( "woocommerce_analytics_clauses_{$type}_{$this->context}", $clauses );
return implode( ' ', $clauses );
}
/**
* Clear SQL clauses by type.
*
* @param string|array $types Clause type.
*/
protected function clear_sql_clause( $types ) {
foreach ( (array) $types as $type ) {
if ( isset( $this->sql_clauses[ $type ] ) ) {
$this->sql_clauses[ $type ] = array();
}
}
}
/**
* Replace strings within SQL clauses by type.
*
* @param string $type Clause type.
* @param string $search String to search for.
* @param string $replace Replacement string.
*/
protected function str_replace_clause( $type, $search, $replace ) {
if ( isset( $this->sql_clauses[ $type ] ) ) {
foreach ( $this->sql_clauses[ $type ] as $key => $sql ) {
$this->sql_clauses[ $type ][ $key ] = str_replace( $search, $replace, $sql );
}
}
}
/**
* Get the full SQL statement.
*
* @return string
*/
public function get_query_statement() {
$join = $this->get_sql_clause( 'join', 'filtered' );
$where = $this->get_sql_clause( 'where', 'filtered' );
$group_by = $this->get_sql_clause( 'group_by', 'filtered' );
$having = $this->get_sql_clause( 'having', 'filtered' );
$order_by = $this->get_sql_clause( 'order_by', 'filtered' );
$union = $this->get_sql_clause( 'union', 'filtered' );
$statement = '';
$statement .= "
SELECT
{$this->get_sql_clause( 'select', 'filtered' )}
FROM
{$this->get_sql_clause( 'from', 'filtered' )}
{$join}
WHERE
1=1
{$where}
";
if ( ! empty( $group_by ) ) {
$statement .= "
GROUP BY
{$group_by}
";
if ( ! empty( $having ) ) {
$statement .= "
HAVING
1=1
{$having}
";
}
}
if ( ! empty( $union ) ) {
$statement .= "
UNION
{$union}
";
}
if ( ! empty( $order_by ) ) {
$statement .= "
ORDER BY
{$order_by}
";
}
return $statement . $this->get_sql_clause( 'limit', 'filtered' );
}
/**
* Reinitialize the clause array.
*/
public function clear_all_clauses() {
$this->sql_clauses = array(
'select' => array(),
'from' => array(),
'left_join' => array(),
'join' => array(),
'right_join' => array(),
'where' => array(),
'where_time' => array(),
'group_by' => array(),
'having' => array(),
'limit' => array(),
'order_by' => array(),
'union' => array(),
);
}
}
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