/**
* Get a list of posts connected to other posts connected to a post.
*
* @param mixed $item An object, an object id or an array of such.
* @param array $extra_qv Additional query variables to use.
*
* @return bool|object False on failure; A WP_Query instance on success.
*/
public function get_related($item, $extra_qv = array(), $output = 'raw')
{
$extra_qv['fields'] = 'ids';
$connected = $this->get_connected($item, $extra_qv, 'abstract');
$additional_qv = array('p2p:exclude' => _p2p_normalize($item));
return $this->flip_direction()->get_connected($connected->items, $additional_qv, $output);
}
private function do_other_query($directed, $which)
{
$side = $directed->get($which, 'side');
$qv = array_merge($this->query, array('fields' => 'ids', 'p2p:per_page' => -1));
if ('any' != $this->items) {
$qv['p2p:include'] = _p2p_normalize($this->items);
}
$qv = $directed->get_final_qv($qv, $which);
return $side->capture_query($qv);
}
/**
* Create a connection.
*
* @param int $p2p_type A valid connection type.
* @param array $args Connection information.
*
* @return bool|int False on failure, p2p_id on success.
*/
function p2p_create_connection($p2p_type, $args)
{
global $wpdb;
extract(wp_parse_args($args, array('direction' => 'from', 'from' => false, 'to' => false, 'meta' => array())), EXTR_SKIP);
list($from) = _p2p_normalize($from);
list($to) = _p2p_normalize($to);
if (!$from || !$to) {
return false;
}
$args = array($from, $to);
if ('to' == $direction) {
$args = array_reverse($args);
}
$wpdb->insert($wpdb->p2p, array('p2p_type' => $p2p_type, 'p2p_from' => $args[0], 'p2p_to' => $args[1]));
$p2p_id = $wpdb->insert_id;
foreach ($meta as $key => $value) {
p2p_add_meta($p2p_id, $key, $value);
}
do_action('p2p_created_connection', $p2p_id);
return $p2p_id;
}
static function alter_clauses($clauses, $q, $main_id_column)
{
global $wpdb;
$clauses['fields'] .= ", {$wpdb->p2p}.*";
$clauses['join'] .= " INNER JOIN {$wpdb->p2p}";
// Handle main query
if ('any' == $q['items']) {
$search = false;
} else {
$search = implode(',', array_map('absint', _p2p_normalize($q['items'])));
}
$where_parts = array();
foreach ($q['p2p_type'] as $p2p_type => $direction) {
if (0 === $p2p_type) {
// used by migration script
$part = "1 = 1";
} else {
$part = $wpdb->prepare("{$wpdb->p2p}.p2p_type = %s", $p2p_type);
}
$fields = array('p2p_from', 'p2p_to');
switch ($direction) {
case 'from':
$fields = array_reverse($fields);
// fallthrough
// fallthrough
case 'to':
list($from, $to) = $fields;
$part .= " AND {$main_id_column} = {$wpdb->p2p}.{$from}";
if ($search) {
$part .= " AND {$wpdb->p2p}.{$to} IN ({$search})";
}
break;
default:
if ($search) {
$part .= " AND (\n\t\t\t\t\t\t({$main_id_column} = {$wpdb->p2p}.p2p_to AND {$wpdb->p2p}.p2p_from IN ({$search})) OR\n\t\t\t\t\t\t({$main_id_column} = {$wpdb->p2p}.p2p_from AND {$wpdb->p2p}.p2p_to IN ({$search}))\n\t\t\t\t\t)";
} else {
$part .= " AND ({$main_id_column} = {$wpdb->p2p}.p2p_to OR {$main_id_column} = {$wpdb->p2p}.p2p_from)";
}
}
$where_parts[] = '(' . $part . ')';
}
if (1 == count($where_parts)) {
$clauses['where'] .= " AND " . $where_parts[0];
} else {
$clauses['where'] .= " AND (" . implode(' OR ', $where_parts) . ")";
}
// Handle custom fields
if (!empty($q['meta'])) {
$meta_clauses = _p2p_meta_sql_helper($q['meta']);
foreach ($meta_clauses as $key => $value) {
$clauses[$key] .= $value;
}
}
// Handle ordering
if ($q['orderby']) {
$clauses['join'] .= $wpdb->prepare("\n\t\t\t\tLEFT JOIN {$wpdb->p2pmeta} AS p2pm_order ON (\n\t\t\t\t\t{$wpdb->p2p}.p2p_id = p2pm_order.p2p_id AND p2pm_order.meta_key = %s\n\t\t\t\t)\n\t\t\t", $q['orderby']);
$order = 'DESC' == strtoupper($q['order']) ? 'DESC' : 'ASC';
$field = 'meta_value';
if ($q['order_num']) {
$field .= '+0';
}
$clauses['orderby'] = "p2pm_order.{$field} {$order}";
}
return $clauses;
}