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<?php
/**
* Network API: WP_Network_Query class
*
* @package WordPress
* @subpackage Multisite
* @since 4.6.0
*/
/**
* Core class used for querying networks.
*
* @since 4.6.0
*
* @see WP_Network_Query::__construct() for accepted arguments.
*/
class WP_Network_Query {
/**
* SQL for database query.
*
* @since 4.6.0
* @var string
*/
public $request;
/**
* SQL query clauses.
*
* @since 4.6.0
* @var array
*/
protected $sql_clauses = array(
'select' => '',
'from' => '',
'where' => array(),
'groupby' => '',
'orderby' => '',
'limits' => '',
);
/**
* Query vars set by the user.
*
* @since 4.6.0
* @var array
*/
public $query_vars;
/**
* Default values for query vars.
*
* @since 4.6.0
* @var array
*/
public $query_var_defaults;
/**
* List of networks located by the query.
*
* @since 4.6.0
* @var array
*/
public $networks;
/**
* The amount of found networks for the current query.
*
* @since 4.6.0
* @var int
*/
public $found_networks = 0;
/**
* The number of pages.
*
* @since 4.6.0
* @var int
*/
public $max_num_pages = 0;
/**
* Constructor.
*
* Sets up the network query, based on the query vars passed.
*
* @since 4.6.0
*
* @param string|array $query {
* Optional. Array or query string of network query parameters. Default empty.
*
* @type array $network__in Array of network IDs to include. Default empty.
* @type array $network__not_in Array of network IDs to exclude. Default empty.
* @type bool $count Whether to return a network count (true) or array of network objects.
* Default false.
* @type string $fields Network fields to return. Accepts 'ids' (returns an array of network IDs)
* or empty (returns an array of complete network objects). Default empty.
* @type int $number Maximum number of networks to retrieve. Default empty (no limit).
* @type int $offset Number of networks to offset the query. Used to build LIMIT clause.
* Default 0.
* @type bool $no_found_rows Whether to disable the `SQL_CALC_FOUND_ROWS` query. Default true.
* @type string|array $orderby Network status or array of statuses. Accepts 'id', 'domain', 'path',
* 'domain_length', 'path_length' and 'network__in'. Also accepts false,
* an empty array, or 'none' to disable `ORDER BY` clause. Default 'id'.
* @type string $order How to order retrieved networks. Accepts 'ASC', 'DESC'. Default 'ASC'.
* @type string $domain Limit results to those affiliated with a given domain. Default empty.
* @type array $domain__in Array of domains to include affiliated networks for. Default empty.
* @type array $domain__not_in Array of domains to exclude affiliated networks for. Default empty.
* @type string $path Limit results to those affiliated with a given path. Default empty.
* @type array $path__in Array of paths to include affiliated networks for. Default empty.
* @type array $path__not_in Array of paths to exclude affiliated networks for. Default empty.
* @type string $search Search term(s) to retrieve matching networks for. Default empty.
* @type bool $update_network_cache Whether to prime the cache for found networks. Default true.
* }
*/
public function __construct( $query = '' ) {
$this->query_var_defaults = array(
'network__in' => '',
'network__not_in' => '',
'count' => false,
'fields' => '',
'number' => '',
'offset' => '',
'no_found_rows' => true,
'orderby' => 'id',
'order' => 'ASC',
'domain' => '',
'domain__in' => '',
'domain__not_in' => '',
'path' => '',
'path__in' => '',
'path__not_in' => '',
'search' => '',
'update_network_cache' => true,
);
if ( ! empty( $query ) ) {
$this->query( $query );
}
}
/**
* Parses arguments passed to the network query with default query parameters.
*
* @since 4.6.0
*
*
* @param string|array $query WP_Network_Query arguments. See WP_Network_Query::__construct()
*/
public function parse_query( $query = '' ) {
if ( empty( $query ) ) {
$query = $this->query_vars;
}
$this->query_vars = wp_parse_args( $query, $this->query_var_defaults );
/**
* Fires after the network query vars have been parsed.
*
* @since 4.6.0
*
* @param WP_Network_Query $this The WP_Network_Query instance (passed by reference).
*/
do_action_ref_array( 'parse_network_query', array( &$this ) );
}
/**
* Sets up the WordPress query for retrieving networks.
*
* @since 4.6.0
*
* @param string|array $query Array or URL query string of parameters.
* @return array|int List of WP_Network objects, a list of network ids when 'fields' is set to 'ids',
* or the number of networks when 'count' is passed as a query var.
*/
public function query( $query ) {
$this->query_vars = wp_parse_args( $query );
return $this->get_networks();
}
/**
* Gets a list of networks matching the query vars.
*
* @since 4.6.0
*
* @return array|int List of WP_Network objects, a list of network ids when 'fields' is set to 'ids',
* or the number of networks when 'count' is passed as a query var.
*/
public function get_networks() {
$this->parse_query();
/**
* Fires before networks are retrieved.
*
* @since 4.6.0
*
* @param WP_Network_Query $this Current instance of WP_Network_Query (passed by reference).
*/
do_action_ref_array( 'pre_get_networks', array( &$this ) );
// $args can include anything. Only use the args defined in the query_var_defaults to compute the key.
$_args = wp_array_slice_assoc( $this->query_vars, array_keys( $this->query_var_defaults ) );
// Ignore the $fields argument as the queried result will be the same regardless.
unset( $_args['fields'] );
$key = md5( serialize( $_args ) );
$last_changed = wp_cache_get_last_changed( 'networks' );
$cache_key = "get_network_ids:$key:$last_changed";
$cache_value = wp_cache_get( $cache_key, 'networks' );
if ( false === $cache_value ) {
$network_ids = $this->get_network_ids();
if ( $network_ids ) {
$this->set_found_networks();
}
$cache_value = array(
'network_ids' => $network_ids,
'found_networks' => $this->found_networks,
);
wp_cache_add( $cache_key, $cache_value, 'networks' );
} else {
$network_ids = $cache_value['network_ids'];
$this->found_networks = $cache_value['found_networks'];
}
if ( $this->found_networks && $this->query_vars['number'] ) {
$this->max_num_pages = ceil( $this->found_networks / $this->query_vars['number'] );
}
// If querying for a count only, there's nothing more to do.
if ( $this->query_vars['count'] ) {
// $network_ids is actually a count in this case.
return intval( $network_ids );
}
$network_ids = array_map( 'intval', $network_ids );
if ( 'ids' == $this->query_vars['fields'] ) {
$this->networks = $network_ids;
return $this->networks;
}
if ( $this->query_vars['update_network_cache'] ) {
_prime_network_caches( $network_ids );
}
// Fetch full network objects from the primed cache.
$_networks = array();
foreach ( $network_ids as $network_id ) {
if ( $_network = get_network( $network_id ) ) {
$_networks[] = $_network;
}
}
/**
* Filters the network query results.
*
* @since 4.6.0
*
* @param array $_networks An array of WP_Network objects.
* @param WP_Network_Query $this Current instance of WP_Network_Query (passed by reference).
*/
$_networks = apply_filters_ref_array( 'the_networks', array( $_networks, &$this ) );
// Convert to WP_Network instances
$this->networks = array_map( 'get_network', $_networks );
return $this->networks;
}
/**
* Used internally to get a list of network IDs matching the query vars.
*
* @since 4.6.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @return int|array A single count of network IDs if a count query. An array of network IDs if a full query.
*/
protected function get_network_ids() {
global $wpdb;
$order = $this->parse_order( $this->query_vars['order'] );
// Disable ORDER BY with 'none', an empty array, or boolean false.
if ( in_array( $this->query_vars['orderby'], array( 'none', array(), false ), true ) ) {
$orderby = '';
} elseif ( ! empty( $this->query_vars['orderby'] ) ) {
$ordersby = is_array( $this->query_vars['orderby'] ) ?
$this->query_vars['orderby'] :
preg_split( '/[,\s]/', $this->query_vars['orderby'] );
$orderby_array = array();
foreach ( $ordersby as $_key => $_value ) {
if ( ! $_value ) {
continue;
}
if ( is_int( $_key ) ) {
$_orderby = $_value;
$_order = $order;
} else {
$_orderby = $_key;
$_order = $_value;
}
$parsed = $this->parse_orderby( $_orderby );
if ( ! $parsed ) {
continue;
}
if ( 'network__in' === $_orderby ) {
$orderby_array[] = $parsed;
continue;
}
$orderby_array[] = $parsed . ' ' . $this->parse_order( $_order );
}
$orderby = implode( ', ', $orderby_array );
} else {
$orderby = "$wpdb->site.id $order";
}
$number = absint( $this->query_vars['number'] );
$offset = absint( $this->query_vars['offset'] );
if ( ! empty( $number ) ) {
if ( $offset ) {
$limits = 'LIMIT ' . $offset . ',' . $number;
} else {
$limits = 'LIMIT ' . $number;
}
}
if ( $this->query_vars['count'] ) {
$fields = 'COUNT(*)';
} else {
$fields = "$wpdb->site.id";
}
// Parse network IDs for an IN clause.
if ( ! empty( $this->query_vars['network__in'] ) ) {
$this->sql_clauses['where']['network__in'] = "$wpdb->site.id IN ( " . implode( ',', wp_parse_id_list( $this->query_vars['network__in'] ) ) . ' )';
}
// Parse network IDs for a NOT IN clause.
if ( ! empty( $this->query_vars['network__not_in'] ) ) {
$this->sql_clauses['where']['network__not_in'] = "$wpdb->site.id NOT IN ( " . implode( ',', wp_parse_id_list( $this->query_vars['network__not_in'] ) ) . ' )';
}
if ( ! empty( $this->query_vars['domain'] ) ) {
$this->sql_clauses['where']['domain'] = $wpdb->prepare( "$wpdb->site.domain = %s", $this->query_vars['domain'] );
}
// Parse network domain for an IN clause.
if ( is_array( $this->query_vars['domain__in'] ) ) {
$this->sql_clauses['where']['domain__in'] = "$wpdb->site.domain IN ( '" . implode( "', '", $wpdb->_escape( $this->query_vars['domain__in'] ) ) . "' )";
}
// Parse network domain for a NOT IN clause.
if ( is_array( $this->query_vars['domain__not_in'] ) ) {
$this->sql_clauses['where']['domain__not_in'] = "$wpdb->site.domain NOT IN ( '" . implode( "', '", $wpdb->_escape( $this->query_vars['domain__not_in'] ) ) . "' )";
}
if ( ! empty( $this->query_vars['path'] ) ) {
$this->sql_clauses['where']['path'] = $wpdb->prepare( "$wpdb->site.path = %s", $this->query_vars['path'] );
}
// Parse network path for an IN clause.
if ( is_array( $this->query_vars['path__in'] ) ) {
$this->sql_clauses['where']['path__in'] = "$wpdb->site.path IN ( '" . implode( "', '", $wpdb->_escape( $this->query_vars['path__in'] ) ) . "' )";
}
// Parse network path for a NOT IN clause.
if ( is_array( $this->query_vars['path__not_in'] ) ) {
$this->sql_clauses['where']['path__not_in'] = "$wpdb->site.path NOT IN ( '" . implode( "', '", $wpdb->_escape( $this->query_vars['path__not_in'] ) ) . "' )";
}
// Falsey search strings are ignored.
if ( strlen( $this->query_vars['search'] ) ) {
$this->sql_clauses['where']['search'] = $this->get_search_sql(
$this->query_vars['search'],
array( "$wpdb->site.domain", "$wpdb->site.path" )
);
}
$join = '';
$where = implode( ' AND ', $this->sql_clauses['where'] );
$pieces = array( 'fields', 'join', 'where', 'orderby', 'limits', 'groupby' );
/**
* Filters the network query clauses.
*
* @since 4.6.0
*
* @param array $pieces A compacted array of network query clauses.
* @param WP_Network_Query $this Current instance of WP_Network_Query (passed by reference).
*/
$clauses = apply_filters_ref_array( 'networks_clauses', array( compact( $pieces ), &$this ) );
$fields = isset( $clauses['fields'] ) ? $clauses['fields'] : '';
$join = isset( $clauses['join'] ) ? $clauses['join'] : '';
$where = isset( $clauses['where'] ) ? $clauses['where'] : '';
$orderby = isset( $clauses['orderby'] ) ? $clauses['orderby'] : '';
$limits = isset( $clauses['limits'] ) ? $clauses['limits'] : '';
$groupby = isset( $clauses['groupby'] ) ? $clauses['groupby'] : '';
if ( $where ) {
$where = 'WHERE ' . $where;
}
if ( $groupby ) {
$groupby = 'GROUP BY ' . $groupby;
}
if ( $orderby ) {
$orderby = "ORDER BY $orderby";
}
$found_rows = '';
if ( ! $this->query_vars['no_found_rows'] ) {
$found_rows = 'SQL_CALC_FOUND_ROWS';
}
$this->sql_clauses['select'] = "SELECT $found_rows $fields";
$this->sql_clauses['from'] = "FROM $wpdb->site $join";
$this->sql_clauses['groupby'] = $groupby;
$this->sql_clauses['orderby'] = $orderby;
$this->sql_clauses['limits'] = $limits;
$this->request = "{$this->sql_clauses['select']} {$this->sql_clauses['from']} {$where} {$this->sql_clauses['groupby']} {$this->sql_clauses['orderby']} {$this->sql_clauses['limits']}";
if ( $this->query_vars['count'] ) {
return intval( $wpdb->get_var( $this->request ) );
}
$network_ids = $wpdb->get_col( $this->request );
return array_map( 'intval', $network_ids );
}
/**
* Populates found_networks and max_num_pages properties for the current query
* if the limit clause was used.
*
* @since 4.6.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*/
private function set_found_networks() {
global $wpdb;
if ( $this->query_vars['number'] && ! $this->query_vars['no_found_rows'] ) {
/**
* Filters the query used to retrieve found network count.
*
* @since 4.6.0
*
* @param string $found_networks_query SQL query. Default 'SELECT FOUND_ROWS()'.
* @param WP_Network_Query $network_query The `WP_Network_Query` instance.
*/
$found_networks_query = apply_filters( 'found_networks_query', 'SELECT FOUND_ROWS()', $this );
$this->found_networks = (int) $wpdb->get_var( $found_networks_query );
}
}
/**
* Used internally to generate an SQL string for searching across multiple columns.
*
* @since 4.6.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $string Search string.
* @param array $columns Columns to search.
*
* @return string Search SQL.
*/
protected function get_search_sql( $string, $columns ) {
global $wpdb;
$like = '%' . $wpdb->esc_like( $string ) . '%';
$searches = array();
foreach ( $columns as $column ) {
$searches[] = $wpdb->prepare( "$column LIKE %s", $like );
}
return '(' . implode( ' OR ', $searches ) . ')';
}
/**
* Parses and sanitizes 'orderby' keys passed to the network query.
*
* @since 4.6.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $orderby Alias for the field to order by.
* @return string|false Value to used in the ORDER clause. False otherwise.
*/
protected function parse_orderby( $orderby ) {
global $wpdb;
$allowed_keys = array(
'id',
'domain',
'path',
);
$parsed = false;
if ( $orderby == 'network__in' ) {
$network__in = implode( ',', array_map( 'absint', $this->query_vars['network__in'] ) );
$parsed = "FIELD( {$wpdb->site}.id, $network__in )";
} elseif ( $orderby == 'domain_length' || $orderby == 'path_length' ) {
$field = substr( $orderby, 0, -7 );
$parsed = "CHAR_LENGTH($wpdb->site.$field)";
} elseif ( in_array( $orderby, $allowed_keys ) ) {
$parsed = "$wpdb->site.$orderby";
}
return $parsed;
}
/**
* Parses an 'order' query variable and cast it to 'ASC' or 'DESC' as necessary.
*
* @since 4.6.0
*
* @param string $order The 'order' query variable.
* @return string The sanitized 'order' query variable.
*/
protected function parse_order( $order ) {
if ( ! is_string( $order ) || empty( $order ) ) {
return 'ASC';
}
if ( 'ASC' === strtoupper( $order ) ) {
return 'ASC';
} else {
return 'DESC';
}
}
}