/**
* retrieves an array with messages that form one threat in that each message
* was a reply to the next one in line, everything starting with $replyto as
* the id of the first message. <br/>
* returns an empty array, if no message can be found - e.g. if all messages
* have been deleted by user $usr<br/>
* Only messages are returned that are not yet deleted. If a message in a thread
* was deleted (also if only by this user), the thread is no longer followed from
* there on
*
* example result: <br/>
* array ( <br/>
* 0 => <br/>
* stdClass::__set_state(array( <br/>
* 'id' => '23', <br/>
* 'type' => '2', <br/>
* 'ctime' => '2013-09-12 10:12:26', <br/>
* 'subject' => 'some subject', <br/>
* 'message' => 'some body', <br/>
* 'parent' => NULL, <br/>
* 'userids' => <br/>
* array ( <br/>
* 0 => '1', <br/>
* 1 => '2', <br/>
* ), <br/>
* 'fromid' => '1', <br/>
* )) <br/>
* )
*
* @param int $msgid the id of the message
* @param int $usr
* @return array
*/
function get_message_thread_mr($msgid, $usr = null)
{
global $USER;
if (null === $usr) {
$usr = $USER->get('id');
}
$message = get_message_mr($usr, $msgid);
if (null !== $message && !empty($message->parent)) {
$subthread = get_message_thread_mr($message->parent);
if (null !== $subthread && sizeof($subthread) > 0) {
return array_merge($subthread, array($message));
}
}
if (null === $message) {
return null;
}
return array($message);
}
$users[] = $userrelid;
} else {
$SESSION->add_info_msg(get_string('removeduserfromlist', 'module.multirecipientnotification'));
}
}
if ($USER->get('id') !== $message->fromid) {
$deleted = get_field('usr', 'deleted', 'id', $message->fromid);
if ($deleted === '0' && can_send_message($USER->to_stdclass(), $message->fromid) && $USER->id != $message->fromid) {
$users[] = $message->fromid;
} else {
$SESSION->add_info_msg(get_string('removeduserfromlist', 'module.multirecipientnotification'));
}
}
}
// OK, now it is safe to fetch the whole thread.
$messages = get_message_thread_mr($replytoid);
if (!is_array($messages) || count($messages) <= 0) {
throw new AccessDeniedException();
}
// there may be deleted users as sender or other recipients, so we format
// all users here to not link to deleted users or the logged in user. Also
// count deleted users and wrap them up in one span at the end
foreach ($messages as $oldmessage) {
$fromusr = get_user($oldmessage->fromid);
if ($USER->get('id') === $oldmessage->fromid || $fromusr->deleted) {
$oldmessage->fromusrlink = null;
} else {
$oldmessage->fromusrlink = profile_url($oldmessage->fromid);
}
if ($fromusr->deleted) {
$oldmessage->fromusrname = get_string('deleteduser');
