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<?php
/**
* Handle asynchronous facet
*
* @package WP Grid Builder
* @author Loïc Blascos
* @copyright 2019-2021 Loïc Blascos
*/
namespace WP_Grid_Builder\FrontEnd\Facets;
use WP_Grid_Builder\Includes\Helpers;
// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
/**
* Async
*
* @class WP_Grid_Builder\FrontEnd\Facets\Async
* @since 1.0.0
*/
class Async {
/**
* Constructor
*
* @since 1.0.0
* @access public
*/
public function __construct() {}
/**
* Query facet choices
*
* @since 1.0.0
* @access public
*
* @param array $facet Holds facet settings.
* @param string $search Searched string.
* @return array Holds facet items.
*/
public function query_facet( $facet, $search = '' ) {
if ( ! wpgb_has_selected_facets() ) {
$items = $this->get_facet_items( $facet, $search, false );
} elseif ( ! $facet['show_empty'] ) {
$items = $this->get_facet_items( $facet, $search );
} else {
$items = $this->merge_facets(
$this->get_facet_items( $facet, $search ),
$this->get_facet_items( $facet, $search, false )
);
}
return $this->normalize( $facet, $items );
}
/**
* Query facet items from object ids
*
* @since 1.3.0 Split search string into terms
* @since 1.0.0
* @access public
*
* @param array $facet Holds facet settings.
* @param string $search Searched string.
* @param boolean $filtered Where clause state.
* @return array Holds facet items.
*/
public function get_facet_items( $facet, $search, $filtered = true ) {
global $wpdb;
// Make sure we can select any value if single selection.
if ( ! $facet['multiple'] ) {
$facet['logic'] = 'OR';
}
$child_clause = '';
$order_clause = wpgb_get_orderby_clause( $facet );
// Because we escape HTML and decode entities on search.
$search_value = wp_specialchars_decode( $search, ENT_QUOTES );
$search_value = wp_kses_normalize_entities( $search_value );
if ( ! $facet['children'] ) {
$child_clause = 'AND facet_parent = 0';
}
if ( $filtered ) {
$where_clause = wpgb_get_filtered_where_clause( $facet, $facet['logic'] );
} else {
$where_clause = wpgb_get_unfiltered_where_clause();
}
$like_clause = $this->parse_search( $search_value );
// phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared
return $wpdb->get_results(
$wpdb->prepare(
"SELECT facet_name, facet_value, facet_id, facet_parent, COUNT(DISTINCT object_id) AS count
FROM {$wpdb->prefix}wpgb_index
WHERE slug = %s
$child_clause
AND $where_clause
AND $like_clause
GROUP BY facet_name
ORDER BY $order_clause
LIMIT %d",
$facet['slug'],
$facet['limit']
)
);
// phpcs:enable WordPress.DB.PreparedSQL.InterpolatedNotPrepared
}
/**
* Parse search string
*
* @since 1.3.0
* @access public
*
* @param string $string Searched string to parse.
* @return array Search clauses
*/
public function parse_search( $string ) {
global $wpdb;
$terms = Helpers::split_into_words( $string );
$terms = array_map(
function( $term ) use ( $wpdb ) {
return $wpdb->prepare( 'facet_name LIKE %s', '%' . $wpdb->esc_like( $term ) . '%' );
},
array_unique( $terms )
);
return implode( ' AND ', $terms );
}
/**
* Normalize facet length and name
*
* @since 1.0.0
* @access public
*
* @param array $facet Holds facet settings.
* @param boolean $items Hold facet items.
* @return array Holds facet items.
*/
public function normalize( $facet, $items ) {
$count = $facet['show_count'];
$items = array_slice( $items, 0, $facet['limit'] );
return array_map(
function( $item ) use ( $count ) {
// Item value is used in combobox and added with .textContent method in JS so we need to decode.
$item->facet_name = html_entity_decode( esc_html( $item->facet_name ), ENT_QUOTES, 'UTF-8' );
$item->facet_parent = (int) $item->facet_parent;
$item->count = $count ? (int) $item->count : false;
return $item;
},
$items
);
}
/**
* Merge facet items
*
* @since 1.0.0
* @access public
*
* @param array $filtered_facet Holds filtered facet items.
* @param array $unfiltered_facet Holds unfiltered facet items.
* @return array Holds facet items.
*/
public function merge_facets( $filtered_facet, $unfiltered_facet ) {
$filtered = [];
$unfiltered = [];
// Rebuild filtered facet items with value as key.
foreach ( $filtered_facet as $item ) {
// Key as string (in case it's an integer) to preserve order.
$filtered[ '_' . $item->facet_value ] = $item;
}
// Rebuild unfiltered facet items with value as key.
foreach ( $unfiltered_facet as $item ) {
$unfiltered[ '_' . $item->facet_value ] = $item;
}
// Remove filtered values.
$unfiltered = array_filter(
$unfiltered,
function( $item ) use ( $filtered ) {
return ! isset( $filtered[ $item->facet_value ] );
}
);
$facet = $filtered + $unfiltered;
$facet = array_map(
function( $facet ) use ( $filtered ) {
$is_filtered = isset( $filtered[ '_' . $facet->facet_value ] );
$facet->count = $is_filtered ? $facet->count : 0;
$facet->disabled = ! $facet->count;
return $facet;
},
$facet
);
return array_values( $facet );
}
/**
* Query selected facet choices
*
* @since 1.0.0
* @access public
*
* @param array $facet Holds facet settings.
* @return array Holds facet items.
*/
public function query_selected( $facet ) {
if ( empty( $facet['selected'] ) ) {
return [];
}
// Make sure we can select any value if single selection.
if ( ! $facet['multiple'] ) {
$facet['logic'] = 'OR';
}
$selected = $this->get_selected_items( $facet );
// If no selected values found with current query.
// Get selected values from unfiltered query.
if ( empty( $selected ) ) {
$selected = $this->get_selected_items( $facet, false );
// Set count to 0 because the values do not exist initially (because of a search for example).
$selected = array_map(
function( $item ) {
$item->count = 0;
return $item;
},
$selected
);
}
return $selected;
}
/**
* Query selected facet items from object ids
*
* @since 1.0.0
* @access public
*
* @param array $facet Holds facet settings.
* @param boolean $filtered Where clause state.
* @return array Holds facet items.
*/
public function get_selected_items( $facet, $filtered = true ) {
global $wpdb;
if ( wpgb_has_selected_facets() && $filtered ) {
$where_clause = wpgb_get_filtered_where_clause( $facet, $facet['logic'] );
} else {
$where_clause = wpgb_get_unfiltered_where_clause();
}
$placeholders = rtrim( str_repeat( '%s,', count( $facet['selected'] ) ), ',' );
// phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared
return $wpdb->get_results(
$wpdb->prepare(
"SELECT facet_name, facet_value, facet_id, facet_parent, COUNT(DISTINCT object_id) AS count
FROM {$wpdb->prefix}wpgb_index
WHERE slug = %s
AND $where_clause
AND facet_value IN($placeholders)
GROUP BY facet_value
ORDER BY FIELD(facet_value, $placeholders)
LIMIT %d",
array_merge(
(array) $facet['slug'],
$facet['selected'],
$facet['selected'],
(array) count( $facet['selected'] )
)
)
);
// phpcs:enable WordPress.DB.PreparedSQL.InterpolatedNotPrepared
}
}
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