$messages = $DB->get_records_select('chat_messages_current', 'chatid = :chatid AND timestamp > :lasttime ' . $groupselect, $params, 'timestamp ASC');
if (!empty($messages)) {
$num = count($messages);
} else {
$num = 0;
}
$chat_newrow = ($chat_lastrow + $num) % 2;
$send_user_list = false;
if ($messages && $chat_lasttime != $chat_newlasttime) {
foreach ($messages as $n => &$message) {
$tmp = new stdClass();
// when somebody enter room, user list will be updated
if (!empty($message->system)) {
$send_user_list = true;
}
if ($html = chat_format_message_theme($message, $chatuser, $USER, $cm->groupingid, $theme)) {
$message->mymessage = $USER->id == $message->userid;
$message->message = $html->html;
if (!empty($html->type)) {
$message->type = $html->type;
}
} else {
unset($messages[$n]);
}
}
}
if ($send_user_list) {
// return users when system message coming
$users = chat_format_userlist(chat_get_users($chatuser->chatid, $chatuser->groupid, $cm->groupingid), $course);
$response['users'] = $users;
}
if (!empty($messages)) {
$num = count($messages);
} else {
$num = 0;
}
$chat_newrow = ($chat_lastrow + $num) % 2;
$send_user_list = false;
if ($messages && $chat_lasttime != $chat_newlasttime) {
foreach ($messages as $n => &$message) {
$tmp = new stdClass();
// when somebody enter room, user list will be updated
if (!empty($message->system)) {
$send_user_list = true;
$users = chat_format_userlist(chat_get_users($chatuser->chatid, $chatuser->groupid, $cm->groupingid), $course);
}
if ($html = chat_format_message_theme($message, $chatuser->course, $USER, $theme)) {
$message->mymessage = $USER->id == $message->userid;
$message->message = $html->html;
if (!empty($html->type)) {
$message->type = $html->type;
}
} else {
unset($messages[$n]);
}
}
}
if (!empty($users) && $send_user_list) {
// return users when system message coming
$response['users'] = $users;
}
$DB->set_field('chat_users', 'lastping', time(), array('id' => $chatuser->id));