public function replies($index = null)
{
global $DB;
if (empty($this->_replies)) {
// only all replies in an open or close state, a reply should never be automated
// and drafts are no in the line of published conversation.
$items = array(dialogue::STATE_OPEN, dialogue::STATE_CLOSED);
list($insql, $inparams) = $DB->get_in_or_equal($items, SQL_PARAMS_NAMED, 'viewstate');
$sql = "SELECT dm.*\n FROM {dialogue_messages} dm\n WHERE dm.conversationindex > 1\n AND dm.state {$insql}\n AND dm.conversationid = :conversationid\n ORDER BY dm.conversationindex ASC";
$params = array('conversationid' => $this->conversationid) + $inparams;
$records = $DB->get_records_sql($sql, $params);
foreach ($records as $record) {
$reply = new reply($this->_dialogue, $this);
$reply->load($record);
$this->_replies[$record->id] = $reply;
}
}
if ($index) {
if (!isset($this->_replies[$index])) {
throw new \coding_exception('index not defined');
}
return $this->_replies[$index];
}
return $this->_replies;
}