function message_on_preview(&$api)
{
include dirname(__FILE__) . '/message_controller.class.php';
$parent_id = (int) $_POST['parent_id'];
$may_quote = (int) $_POST['may_quote'];
$controller = new MessageController($api);
$user = $api->user();
$message = new Message(message_get_new_posting($api), $api);
message_init_posting_from_post_data($message);
// Check the posting for completeness.
$err = $message->check_complete();
if ($err) {
$controller->add_hint(new \hint\Error($err));
return $controller->show_compose($message, $parent_id, $may_quote);
}
// Make sure that the username is not in use.
if ($user->is_anonymous() && !$api->userdb()->username_is_available($message->get_username())) {
$err = _('The entered username is not available.');
$controller->add_hint(new \hint\Error($err));
return $controller->show_compose($message, $parent_id, $may_quote);
}
// Success.
/* Plugin hook: on_message_preview_print
* Called before the HTML for the posting preview is produced.
* Args: posting: The posting that is about to be previewed.
*/
$api->eventbus()->emit('on_message_preview_print', $api, $message);
$api->breadcrumbs()->add_text(_('Preview'));
$controller->show_preview($message, $parent_id, $may_quote);
}
