function calculateUserWeight($pUserId = NULL)
{
global $gBitUser, $gBitSystem;
if ($gBitSystem->isFeatureActive('stars_user_weight')) {
// allow overriding of currently loaded user
if (@BitBase::verifyId($pUserId)) {
$tmpUser = new BitPermUser($pUserId);
$tmpUser->load(TRUE);
} else {
$tmpUser =& $gBitUser;
}
// age relative to site age
$query = "SELECT MIN( `registration_date` ) FROM `" . BIT_DB_PREFIX . "users_users`";
$age['site'] = BitDate::getUTCTime() - $this->mDb->getOne($query);
$age['user'] = BitDate::getUTCTime() - $tmpUser->getField('registration_date');
$userWeight['age'] = $age['user'] / $age['site'];
// permissioning relative to full number of permissions
$query = "SELECT COUNT( `perm_name` ) FROM `" . BIT_DB_PREFIX . "users_permissions`";
if ($tmpUser->isAdmin()) {
$userWeight['permission'] = 1;
} else {
$userWeight['permission'] = count($tmpUser->mPerms) / $this->mDb->getOne($query);
}
// activity - we could to the same using the history as well.
$query = "SELECT COUNT( `content_id` ) FROM `" . BIT_DB_PREFIX . "liberty_content` WHERE `user_id`=?";
$activity['user'] = $this->mDb->getOne($query, array($tmpUser->getField('user_id')));
$query = "SELECT COUNT( `content_id` ) FROM `" . BIT_DB_PREFIX . "liberty_content`";
$activity['site'] = $this->mDb->getOne($query);
$userWeight['activity'] = $activity['user'] / $activity['site'];
// here we can add some weight to various areas
$custom['age'] = $gBitSystem->getConfig('stars_weight_age');
$custom['permission'] = $gBitSystem->getConfig('stars_weight_permission');
$custom['activity'] = $gBitSystem->getConfig('stars_weight_activity');
foreach ($userWeight as $type => $value) {
${$type} = 10 * $value * $custom[$type];
if (empty(${$type})) {
${$type} = 1;
}
}
// TODO: run some tests to see if this is a good way of evaluating power of a user
// ensure that we always have a positive number here to avoid chaos - this also makes sure new users have at least a bit of a say
if (($ret = round(log($age * $permission * $activity, 2))) < 1) {
$ret = 1;
}
} else {
$ret = 1;
}
return $ret;
}
