/**
* Get all link instances associated with one or more links.
*
* @param array $link_ids Array of link IDs.
* @param string $purpose An optional code indicating how the instances will be used. Available predefined constants : BLC_FOR_DISPLAY, BLC_FOR_EDITING
* @param bool $load_containers Preload containers regardless of purpose.
* @param bool $load_wrapped_objects Preload wrapped objects regardless of purpose.
* @return array An array indexed by link ID. Each item of the array will be an array of blcLinkInstance objects.
*/
function blc_get_instances($link_ids, $purpose = '', $load_containers = false, $load_wrapped_objects = false)
{
global $wpdb;
if (empty($link_ids)) {
return array();
}
$link_ids_in = implode(', ', $link_ids);
$q = "SELECT * FROM {$wpdb->prefix}blc_instances WHERE link_id IN ({$link_ids_in})";
$results = $wpdb->get_results($q, ARRAY_A);
if (empty($results)) {
return array();
}
//Also retrieve the containers, if it could be useful.
$load_containers = $load_containers || in_array($purpose, array(BLC_FOR_DISPLAY, BLC_FOR_EDITING));
if ($load_containers) {
//Collect a list of (container_type, container_id) pairs
$container_ids = array();
foreach ($results as $result) {
array_push($container_ids, array($result['container_type'], intval($result['container_id'])));
}
$containers = blc_get_containers($container_ids, $purpose, $load_wrapped_objects);
}
//Create an object for each instance and group them by link ID
$instances = array();
foreach ($results as $result) {
$instance = new blcLinkInstance($result);
//Assign a container to the link instance, if available
if ($load_containers && !empty($containers)) {
$key = $instance->container_type . '|' . $instance->container_id;
if (isset($containers[$key])) {
$instance->_container = $containers[$key];
}
}
if (isset($instances[$instance->link_id])) {
array_push($instances[$instance->link_id], $instance);
} else {
$instances[$instance->link_id] = array($instance);
}
}
return $instances;
}
/**
* Delete posts, bookmarks and other items that contain any of the specified links.
*
* @param array $selected_links An array of link IDs
* @return array Confirmation message and its CSS class.
*/
function do_bulk_delete_sources($selected_links)
{
global $blc_container_registry;
$message = '';
$msg_class = 'updated';
//Delete posts, blogroll entries and any other link containers that contain any of the selected links.
//
//Note that once all cotnainers containing a particular link have been deleted,
//there is no need to explicitly delete the link record itself. The hooks attached to
//the actions that execute when something is deleted (e.g. "post_deleted") will
//take care of that.
check_admin_referer('bulk-action');
if (count($selected_links) > 0) {
$messages = array();
//Fetch all the selected links
$links = blc_get_links(array('link_ids' => $selected_links, 'load_instances' => true));
//Make a list of all containers associated with these links, with each container
//listed only once.
$containers = array();
foreach ($links as $link) {
$instances = $link->get_instances();
foreach ($instances as $instance) {
$key = $instance->container_type . '|' . $instance->container_id;
$containers[$key] = array($instance->container_type, $instance->container_id);
}
}
//Instantiate the containers
$containers = blc_get_containers($containers);
//Delete their associated entities
$deleted = array();
foreach ($containers as $container) {
$container_type = $container->container_type;
$rez = $container->delete_wrapped_object();
if (is_wp_error($rez)) {
//Record error messages for later display
$messages[] = $rez->get_error_message();
$msg_class = 'error';
} else {
//Keep track of how many of each type were deleted.
if (isset($deleted[$container_type])) {
$deleted[$container_type]++;
} else {
$deleted[$container_type] = 1;
}
}
}
//Generate delete confirmation messages
foreach ($deleted as $container_type => $number) {
$messages[] = $blc_container_registry->ui_bulk_delete_message($container_type, $number);
}
if (count($messages) > 0) {
$message = implode('<br>', $messages);
} else {
$message = __("Didn't find anything to delete!", 'broken-link-checker');
$msg_class = 'error';
}
}
return array($message, $msg_class);
}