--- /dev/null
+<?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
+ * @access public
+ * @var string
+ */
+ public $request;
+
+ /**
+ * SQL query clauses.
+ *
+ * @since 4.6.0
+ * @access protected
+ * @var array
+ */
+ protected $sql_clauses = array(
+ 'select' => '',
+ 'from' => '',
+ 'where' => array(),
+ 'groupby' => '',
+ 'orderby' => '',
+ 'limits' => '',
+ );
+
+ /**
+ * Query vars set by the user.
+ *
+ * @since 4.6.0
+ * @access public
+ * @var array
+ */
+ public $query_vars;
+
+ /**
+ * Default values for query vars.
+ *
+ * @since 4.6.0
+ * @access public
+ * @var array
+ */
+ public $query_var_defaults;
+
+ /**
+ * List of networks located by the query.
+ *
+ * @since 4.6.0
+ * @access public
+ * @var array
+ */
+ public $networks;
+
+ /**
+ * The amount of found networks for the current query.
+ *
+ * @since 4.6.0
+ * @access public
+ * @var int
+ */
+ public $found_networks = 0;
+
+ /**
+ * The number of pages.
+ *
+ * @since 4.6.0
+ * @access public
+ * @var int
+ */
+ public $max_num_pages = 0;
+
+ /**
+ * Constructor.
+ *
+ * Sets up the network query, based on the query vars passed.
+ *
+ * @since 4.6.0
+ * @access public
+ *
+ * @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 null (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 network ID.
+ * Default current network ID.
+ * @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 network ID.
+ * Default current network ID.
+ * @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
+ *
+ * @access public
+ *
+ * @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
+ * @access public
+ *
+ * @param string|array $query Array or URL query string of parameters.
+ * @return array|int List of networks, or 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
+ * @access public
+ *
+ * @return int|array The list of networks.
+ */
+ 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.
+ $key = md5( serialize( wp_array_slice_assoc( $this->query_vars, array_keys( $this->query_var_defaults ) ) ) );
+ $last_changed = wp_cache_get( 'last_changed', 'networks' );
+ if ( ! $last_changed ) {
+ $last_changed = microtime();
+ wp_cache_set( 'last_changed', $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 $results An array of networks.
+ * @param WP_Network_Query &$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
+ * @access protected
+ *
+ * @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
+ * @access private
+ *
+ * @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
+ * @access protected
+ *
+ * @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
+ * @access protected
+ *
+ * @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
+ * @access protected
+ *
+ * @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';
+ }
+ }
+}
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