<?php
/**
* Network API
*
* @package WordPress
* @subpackage Multisite
* @since 5.1.0
*/

/**
* Retrieves network data given a network ID or network object.
*
* Network data will be cached and returned after being passed through a filter.
* If the provided network is empty, the current network global will be used.
*
* @since 4.6.0
*
* @global WP_Network $current_site
*
* @param WP_Network|int|null $network Optional. Network to retrieve. Default is the current network.
* @return WP_Network|null The network object or null if not found.
*/
function get_network( $network = null ) {
global $current_site;
if ( empty( $network ) && isset( $current_site ) ) {
$network = $current_site;
}

if ( $network instanceof WP_Network ) {
$_network = $network;
} elseif ( is_object( $network ) ) {
$_network = new WP_Network( $network );
} else {
$_network = WP_Network::get_instance( $network );
}

if ( ! $_network ) {
return null;
}

/**
* Fires after a network is retrieved.
*
* @since 4.6.0
*
* @param WP_Network $_network Network data.
*/
$_network = apply_filters( 'get_network', $_network );

return $_network;
}

/**
* Retrieves a list of networks.
*
* @since 4.6.0
*
* @param string|array $args Optional. Array or string of arguments. See WP_Network_Query::parse_query()
* for information on accepted arguments. Default empty array.
* @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.
*/
function get_networks( $args = array() ) {
$query = new WP_Network_Query();

return $query->query( $args );
}

/**
* Removes a network from the object cache.
*
* @since 4.6.0
*
* @global bool $_wp_suspend_cache_invalidation
*
* @param int|array $ids Network ID or an array of network IDs to remove from cache.
*/
function clean_network_cache( $ids ) {
global $_wp_suspend_cache_invalidation;

if ( ! empty( $_wp_suspend_cache_invalidation ) ) {
return;
}

$network_ids = (array) $ids;
wp_cache_delete_multiple( $network_ids, 'networks' );

foreach ( $network_ids as $id ) {
/**
* Fires immediately after a network has been removed from the object cache.
*
* @since 4.6.0
*
* @param int $id Network ID.
*/
do_action( 'clean_network_cache', $id );
}

wp_cache_set_last_changed( 'networks' );
}

/**
* Updates the network cache of given networks.
*
* Will add the networks in $networks to the cache. If network ID already exists
* in the network cache then it will not be updated. The network is added to the
* cache using the network group with the key using the ID of the networks.
*
* @since 4.6.0
*
* @param array $networks Array of network row objects.
*/
function update_network_cache( $networks ) {
$data = array();
foreach ( (array) $networks as $network ) {
$data[ $network->id ] = $network;
}
wp_cache_add_multiple( $data, 'networks' );
}

/**
* Adds any networks from the given IDs to the cache that do not already exist in cache.
*
* @since 4.6.0
* @since 6.1.0 This function is no longer marked as "private".
*
* @see update_network_cache()
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param array $network_ids Array of network IDs.
*/
function _prime_network_caches( $network_ids ) {
global $wpdb;

$non_cached_ids = _get_non_cached_ids( $network_ids, 'networks' );
if ( ! empty( $non_cached_ids ) ) {
$fresh_networks = $wpdb->get_results( sprintf( "SELECT $wpdb->site.* FROM $wpdb->site WHERE id IN (%s)", implode( ',', array_map( 'intval', $non_cached_ids ) ) ) ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared

update_network_cache( $fresh_networks );
}
}