function scorm_seq_evaluate_rollupcond($sco, $conditioncombination, $rollupruleconds, $userid)
{
$bag = array();
$con = "";
$val = false;
$unk = false;
foreach ($rollupruleconds as $rolluprulecond) {
$condit = scorm_evaluate_condition($rolluprulecond, $sco, $userid);
if ($rolluprulecond->operator == 'not') {
// If operator is not, negate the condition.
if ($rolluprulecond->cond != 'unknown') {
if ($condit) {
$condit = false;
} else {
$condit = true;
}
} else {
$condit = 'unknown';
}
array_push($childrenbag, $condit);
}
}
if (empty($bag)) {
return 'unknown';
} else {
$i = 0;
foreach ($bag as $b) {
if ($rolluprulecond->conditioncombination == 'all') {
$val = true;
if ($b == 'unknown') {
$unk = true;
}
if ($b === false) {
return false;
}
} else {
$val = false;
if ($b == 'unknown') {
$unk = true;
}
if ($b === true) {
return true;
}
}
}
}
if ($unk) {
return 'unknown';
}
return $val;
}
function scorm_seq_flow_activity_traversal($activity, $userid, $direction, $childrenflag, $prevdirection, $seq, $userid)
{
$parent = scorm_get_parent($activity);
if (!isset($parent->flow) || $parent->flow == false) {
$seq->deliverable = false;
$seq->exception = 'SB.2.2-1';
$seq->nextactivity = $activity;
return $seq;
}
$rulecheck = scorm_seq_rules_check($activity, 'skip');
if ($rulecheck != null) {
$skip = scorm_evaluate_condition($rulecheck, $activity, $userid);
if ($skip) {
$seq = scorm_seq_flow_tree_traversal($activity, $direction, false, $prevdirection, $seq, $userid, $skip);
$seq = scorm_seq_flow_activity_traversal($seq->nextactivity, $userid, $direction, $childrenflag, $prevdirection, $seq, $userid);
} else {
if (!empty($seq->identifiedactivity)) {
$seq->nextactivity = $activity;
}
}
return $seq;
}
$ch = scorm_check_activity($activity, $userid);
if ($ch) {
$seq->deliverable = false;
$seq->exception = 'SB.2.2-2';
$seq->nextactivity = $activity;
return $seq;
}
if (!scorm_is_leaf($activity)) {
$seq = scorm_seq_flow_tree_traversal($activity, $direction, true, null, $seq, $userid);
if ($seq->identifiedactivity == null) {
$seq->deliverable = false;
$seq->nextactivity = $activity;
return $seq;
} else {
if ($direction == 'backward' && $seq->traversaldir == 'forward') {
$seq = scorm_seq_flow_activity_traversal($seq->identifiedactivity, $userid, 'forward', $childrenflag, 'backward', $seq, $userid);
} else {
$seq = scorm_seq_flow_activity_traversal($seq->identifiedactivity, $userid, $direction, $childrenflag, null, $seq, $userid);
}
return $seq;
}
}
$seq->deliverable = true;
$seq->nextactivity = $activity;
$seq->exception = null;
return $seq;
}
