mirror of
https://github.com/moodle/moodle.git
synced 2025-03-10 10:58:38 +01:00
1188 lines
39 KiB
PHP
1188 lines
39 KiB
PHP
<?php
|
|
// This file is part of Moodle - http://moodle.org/
|
|
//
|
|
// Moodle is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// Moodle is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
function scorm_seq_exit_action_rules($seq,$userid) {
|
|
$sco = $seq->currentactivity;
|
|
$ancestors = scorm_get_ancestors($sco);
|
|
$exittarget = null;
|
|
foreach (array_reverse($ancestors) as $ancestor) {
|
|
if (scorm_seq_rules_check($ancestor,'exit') != null) {
|
|
$exittarget = $ancestor;
|
|
break;
|
|
}
|
|
}
|
|
if ($exittarget != null) {
|
|
$commons = array_slice($ancestors,0,scorm_find_common_ancestor($ancestors,$exittarget));
|
|
|
|
/// Terminate Descendent Attempts Process
|
|
if ($commons) {
|
|
foreach ($commons as $ancestor) {
|
|
|
|
scorm_seq_end_attempt($ancestor,$userid,$seq->attempt);
|
|
$seq->currentactivity = $ancestor;
|
|
}
|
|
}
|
|
}
|
|
return $seq;
|
|
}
|
|
|
|
function scorm_seq_post_cond_rules($seq,$userid) {
|
|
$sco = $seq->currentactivity;
|
|
if (!$seq->suspended) {
|
|
if ($action = scorm_seq_rules_check($sco,'post') != null) {
|
|
switch($action) {
|
|
case 'retry':
|
|
case 'continue':
|
|
case 'previous':
|
|
$seq->sequencing = $action;
|
|
break;
|
|
case 'exitparent':
|
|
case 'exitall':
|
|
$seq->termination = $action;
|
|
break;
|
|
case 'retryall':
|
|
$seq->termination = 'exitall';
|
|
$seq->sequencing = 'retry';
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return $seq;
|
|
}
|
|
|
|
|
|
function scorm_seq_evaluate_rollupcond($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 $val;
|
|
|
|
}
|
|
|
|
|
|
function scorm_seq_check_child ($sco, $action, $userid){
|
|
global $DB;
|
|
|
|
$included = false;
|
|
$sco=scorm_get_sco($sco->id);
|
|
$r = $DB->get_record('scorm_scoes_track', array('scoid'=>$sco->id,'userid'=>$userid,'element'=>'activityattemptcount'));
|
|
if ($action == 'satisfied' || $action == 'notsatisfied'){
|
|
if (!$sco->rollupobjectivesatisfied){
|
|
$included = true;
|
|
if (($action == 'satisfied' && $sco->requiredforsatisfied == 'ifnotsuspended') || ($action == 'notsatisfied' && $sco->requiredfornotsatisfied == 'ifnotsuspended')){
|
|
|
|
if (!scorm_seq_is('activityprogressstatus',$sco->id,$userid) || ((($r->value)>0)&& !scorm_seq_is('suspended',$sco->id,$userid))){
|
|
$included = false;
|
|
}
|
|
|
|
}
|
|
else{
|
|
if (($action == 'satisfied' && $sco->requiredforsatisfied == 'ifattempted') || ($action == 'notsatisfied' && $sco->requiredfornotsatisfied == 'ifattempted')){
|
|
if (!scorm_seq_is('activityprogressstatus',$sco->id,$userid) || (($r->value) == 0)){
|
|
$included = false;
|
|
}
|
|
}
|
|
else{
|
|
if (($action == 'satisfied' && $sco->requiredforsatisfied == 'ifnotskipped') || ($action == 'notsatisfied' && $sco->requiredfornotsatisfied == 'ifnotskipped')){
|
|
$rulch = scorm_seq_rules_check($sco, 'skip');
|
|
if ($rulch != null){
|
|
$included = false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if ($action == 'completed' || $action == 'incomplete'){
|
|
if (!$sco->rollupprogresscompletion){
|
|
$included = true;
|
|
|
|
if (($action == 'completed' && $sco->requiredforcompleted == 'ifnotsuspended') || ($action == 'incomplete' && $sco->requiredforincomplete == 'ifnotsuspended')){
|
|
|
|
if (!scorm_seq_is('activityprogressstatus',$sco->id,$userid) || ( (($r->value)>0)&& !scorm_seq_is('suspended',$sco->id,$userid))){
|
|
$included = false;
|
|
}
|
|
|
|
}
|
|
else{
|
|
|
|
if (($action == 'completed' && $sco->requiredforcompleted == 'ifattempted') || ($action == 'incomplete' && $sco->requiredforincomplete == 'ifattempted')){
|
|
if (!scorm_seq_is('activityprogressstatus',$sco->id,$userid) || (($r->value)==0)){
|
|
$included = false;
|
|
}
|
|
|
|
}
|
|
else{
|
|
if (($action == 'completed' && $sco->requiredforsatisfied == 'ifnotskipped') || ($action == 'incomplete' && $sco->requiredfornotsatisfied == 'ifnotskipped')){
|
|
$rulch = scorm_seq_rules_check($sco, 'skip');
|
|
if ($rulch != null){
|
|
$included = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
}
|
|
|
|
}
|
|
}
|
|
return $included;
|
|
|
|
|
|
}
|
|
function scorm_seq_sequencing ($scoid,$userid,$seq) {
|
|
|
|
switch ($seq->sequencing) {
|
|
|
|
case 'start':
|
|
$seq = scorm_seq_start_sequencing($scoid,$userid,$seq); //We'll see the parameters we have to send, this should update delivery and end
|
|
$seq->sequencing = true;
|
|
|
|
|
|
break;
|
|
|
|
case 'resumeall':
|
|
$seq = scorm_seq_resume_all_sequencing($scoid,$userid,$seq); //We'll see the parameters we have to send, this should update delivery and end
|
|
$seq->sequencing = true;
|
|
|
|
|
|
|
|
break;
|
|
|
|
case 'exit':
|
|
$seq = scorm_seq_exit_sequencing($scoid,$userid,$seq); //We'll see the parameters we have to send, this should update delivery and end
|
|
$seq->sequencing = true;
|
|
|
|
|
|
|
|
break;
|
|
|
|
case 'retry':
|
|
$seq = scorm_seq_retry_sequencing($scoid,$userid,$seq); //We'll see the parameters we have to send, this should update delivery and end
|
|
$seq->sequencing = true;
|
|
|
|
|
|
break;
|
|
|
|
case 'previous':
|
|
$seq = scorm_seq_previous_sequencing($scoid,$userid,$seq);// We'll see the parameters we have to send, this should update delivery and end
|
|
$seq->sequencing = true;
|
|
|
|
|
|
break;
|
|
|
|
case 'choice':
|
|
$seq = scorm_seq_choice_sequencing($scoid,$userid,$seq);// We'll see the parameters we have to send, this should update delivery and end
|
|
$seq->sequencing = true;
|
|
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if ($seq->exception != null){
|
|
$seq->sequencing = false;
|
|
return $seq;
|
|
}
|
|
|
|
$seq->sequencing= true;
|
|
return $seq;
|
|
}
|
|
|
|
|
|
function scorm_seq_start_sequencing($scoid,$userid,$seq){
|
|
global $DB;
|
|
|
|
if (!empty($seq->currentactivity)) {
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.5-1';
|
|
return $seq;
|
|
}
|
|
$sco = $DB->get_record('scorm_scoes', array('scoid'=>$scoid,'userid'=>$userid));
|
|
if (($sco->parent == '/') && scorm_is_leaf($sco)) {//if the activity is the root and is leaf
|
|
$seq->delivery = $sco;
|
|
}
|
|
else{
|
|
$ancestors = scorm_get_ancestors($sco);
|
|
$ancestorsroot = array_reverse($ancestors);
|
|
$res = scorm_seq_flow($ancestorsroot[0],'forward',$seq,true,$userid);
|
|
if($res){
|
|
return $res;
|
|
}
|
|
else{
|
|
//return end and exception
|
|
}
|
|
}
|
|
}
|
|
|
|
function scorm_seq_resume_all_sequencing($scoid,$userid,$seq){
|
|
global $DB;
|
|
|
|
if (!empty($seq->currentactivity)){
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.6-1';
|
|
return $seq;
|
|
}
|
|
$track = $DB->get_record('scorm_scoes_track', array('scoid'=>$scoid,'userid'=>$userid,'element'=>'suspendedactivity'));
|
|
if (!$track) {
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.6-2';
|
|
return $seq;
|
|
}
|
|
$seq->delivery = $DB->get_record('scorm_scoes', array('scoid'=>$scoid,'userid'=>$userid));//we assign the sco to the delivery
|
|
|
|
}
|
|
|
|
function scorm_seq_continue_sequencing($scoid,$userid,$seq){
|
|
if (empty($seq->currentactivity)) {
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.7-1';
|
|
return $seq;
|
|
}
|
|
$currentact= $seq->currentactivity;
|
|
if ($currentact->parent != '/') {//if the activity is the root and is leaf
|
|
$parent = scorm_get_parent ($currentact);
|
|
|
|
if (!isset($parent->flow) || ($parent->flow == false)) {
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.7-2';
|
|
return $seq;
|
|
}
|
|
|
|
$res = scorm_seq_flow($currentact,'forward',$seq,false,$userid);
|
|
if($res){
|
|
return $res;
|
|
}
|
|
else{
|
|
//return end and exception
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
function scorm_seq_previous_sequencing($scoid,$userid,$seq){
|
|
if (empty($seq->currentactivity)) {
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.8-1';
|
|
return $seq;
|
|
}
|
|
|
|
$currentact= $seq->currentactivity;
|
|
if ($currentact->parent != '/') {//if the activity is the root and is leaf
|
|
$parent = scorm_get_parent ($currentact);
|
|
if (!isset($parent->flow) || ($parent->flow == false)) {
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.8-2';
|
|
return $seq;
|
|
}
|
|
|
|
$res = scorm_seq_flow($currentact,'backward',$seq,false,$userid);
|
|
if($res){
|
|
return $res;
|
|
}
|
|
else{
|
|
//return end and exception
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function scorm_seq_exit_sequencing($scoid,$userid,$seq){
|
|
if (empty($seq->currentactivity)) {
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.11-1';
|
|
return $seq;
|
|
}
|
|
|
|
if ($seq->active){
|
|
$seq->endsession = false;
|
|
$seq->exception = 'SB.2.11-2';
|
|
return $seq;
|
|
}
|
|
$currentact= $seq->currentactivity;
|
|
if ($currentact->parent == '/'){
|
|
$seq->endsession = true;
|
|
return $seq;
|
|
}
|
|
|
|
$seq->endsession = false;
|
|
return $seq;
|
|
}
|
|
|
|
function scorm_seq_retry_sequencing($scoid,$userid,$seq){
|
|
if (empty($seq->currentactivity)) {
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.10-1';
|
|
return $seq;
|
|
}
|
|
if ($seq->active || $seq->suspended){
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.10-2';
|
|
return $seq;
|
|
}
|
|
|
|
if (!scorm_is_leaf($seq->currentactivity)){
|
|
$res = scorm_seq_flow($seq->currentactivity,'forward',$seq,true,$userid);
|
|
if($res != null){
|
|
return $res;
|
|
//return deliver
|
|
}
|
|
else{
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.10-3';
|
|
return $seq;
|
|
}
|
|
}
|
|
else{
|
|
$seq->delivery = $seq->currentactivity;
|
|
return $seq;
|
|
}
|
|
|
|
}
|
|
|
|
function scorm_seq_choice_sequencing($sco,$userid,$seq){
|
|
|
|
$avchildren = Array ();
|
|
$comancestor = null;
|
|
$traverse = null;
|
|
|
|
if ($sco == null){
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.9-1';
|
|
return $seq;
|
|
}
|
|
|
|
$ancestors = scorm_get_ancestors($sco);
|
|
$arrpath = array_reverse($ancestors);
|
|
array_push ($arrpath,$sco);//path from the root to the target
|
|
|
|
foreach ($arrpath as $activity){
|
|
|
|
if ($activity->parent != '/') {
|
|
$avchildren = scorm_get_available_children (scorm_get_parent($activity));
|
|
$position = array_search($avchildren, $activity);
|
|
if ($position !== false){
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.9-2';
|
|
return $seq;
|
|
}
|
|
}
|
|
|
|
if (scorm_seq_rules_check($activity,'hidefromchoice' != null)){
|
|
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.9-3';
|
|
return $seq;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if ($sco->parent != '/') {
|
|
$parent = scorm_sco_get_parent ($sco);
|
|
if ( isset($parent->choice) && ($parent->choice == false)){
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.9-4';
|
|
return $seq;
|
|
}
|
|
}
|
|
|
|
if ($seq->currentactivity != null){
|
|
$commonpos = scorm_find_common_ancestor($ancestors,$seq->currentactivity);
|
|
$comancestor = $arrpath [$commonpos];
|
|
}
|
|
else{
|
|
$comancestor = $arrpath [0];
|
|
}
|
|
|
|
if($seq->currentactivity === $sco) {
|
|
break;
|
|
}
|
|
|
|
$sib = scorm_get_siblings($seq->currentactivity);
|
|
$pos = array_search($sib, $sco);
|
|
|
|
if ($pos !== false){
|
|
|
|
$siblings = array_slice($sib, 0, $pos-1);
|
|
|
|
if (empty($siblings)){
|
|
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.9-5';
|
|
return $seq;
|
|
|
|
}
|
|
|
|
$children = scorm_get_children (scorm_get_parent ($sco));
|
|
$pos1 = array_search($children, $sco);
|
|
$pos2 = array_search($seq->currentactivity, $sco);
|
|
if ($pos1>$pos2){
|
|
$traverse = 'forward';
|
|
}
|
|
else{
|
|
$traverse = 'backward';
|
|
}
|
|
|
|
foreach ($siblings as $sibling){
|
|
$seq = scorm_seq_choice_activity_traversal($sibling,$userid,$seq,$traverse);
|
|
if(!$seq->reachable){
|
|
$seq->delivery = null;
|
|
return $seq;
|
|
}
|
|
}
|
|
break;
|
|
|
|
}
|
|
|
|
if($seq->currentactivity == null || $seq->currentactivity == $comancestor){
|
|
$commonpos = scorm_find_common_ancestor($ancestors,$seq->currentactivity);
|
|
$comtarget = array_slice($ancestors, 1,$commonpos-1);//path from the common ancestor to the target activity
|
|
$comtarget = array_reverse($comtarget);
|
|
|
|
if (empty($comtarget)){
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.9-5';
|
|
return $seq;
|
|
}
|
|
foreach ($comtarget as $act){
|
|
$seq = scorm_seq_choice_activity_traversal($act,$userid,$seq,'forward');
|
|
if(!$seq->reachable){
|
|
$seq->delivery = null;
|
|
return $seq;
|
|
}
|
|
$act = scorm_get_sco ($acti->id);
|
|
if(scorm_seq_is('active',$act->id,$userid) && ($act->id != $comancestor->id && $act->preventactivation)){//adlseq:can i write it like another property for the $seq object?
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.9-6';
|
|
return $seq;
|
|
}
|
|
}
|
|
break;
|
|
|
|
}
|
|
|
|
if ($comancestor->id == $sco->id){
|
|
|
|
$ancestorscurrent = scorm_get_ancestors($seq->currentactivity);
|
|
$possco = array_search ($ancestorscurrent, $sco);
|
|
$curtarget = array_slice($ancestorscurrent,0,$possco);//path from the current activity to the target
|
|
|
|
if (empty($curtarget)){
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.9-5';
|
|
return $seq;
|
|
}
|
|
$i=0;
|
|
foreach ($curtarget as $activ){
|
|
$i++;
|
|
if ($i != sizeof($curtarget)){
|
|
if ( isset($activ->choiceexit) && ($activ->choiceexit == false)){
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.9-7';
|
|
return $seq;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (array_search ($ancestors, $comancestor)!== false){
|
|
$ancestorscurrent = scorm_get_ancestors($seq->currentactivity);
|
|
$commonpos = scorm_find_common_ancestor($ancestors,$sco);
|
|
$curcommon = array_slice($ancestorscurrent,0,$commonpos-1);
|
|
if(empty($curcommon)){
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.9-5';
|
|
return $seq;
|
|
}
|
|
|
|
$constrained = null;
|
|
foreach ($curcommon as $acti){
|
|
$acti = scorm_get_sco($acti->id);
|
|
if ( isset($acti->choiceexit) && ($acti->choiceexit == false)){
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.9-7';
|
|
return $seq;
|
|
}
|
|
if ($constrained == null){
|
|
if($acti->constrainchoice == true){
|
|
$constrained = $acti;
|
|
}
|
|
}
|
|
}
|
|
if ($constrained != null){
|
|
$fwdir = scorm_get_preorder($constrained);
|
|
|
|
if(array_search ($fwdir, $sco)!== false){
|
|
$traverse = 'forward';
|
|
}
|
|
else{
|
|
$traverse = 'backward';
|
|
}
|
|
$seq = scorm_seq_choice_flow ($constrained, $traverse, $seq);
|
|
$actconsider = $seq->identifiedactivity;
|
|
$avdescendents = Array();
|
|
$avdescendents= scorm_get_available_descendents ($actconsider);
|
|
if (array_search ($avdescendents, $sco) !== false && $sco->id != $actconsider->id && $constrained->id != $sco->id ){
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.9-8';
|
|
return $seq;
|
|
}
|
|
|
|
//CONTINUE 11.5.5
|
|
}
|
|
|
|
$commonpos = scorm_find_common_ancestor($ancestors,$seq->currentactivity);
|
|
$comtarget = array_slice($ancestors, 1,$commonpos-1);//path from the common ancestor to the target activity
|
|
$comtarget = array_reverse($comtarget);
|
|
|
|
if (empty($comtarget)){
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.9-5';
|
|
return $seq;
|
|
}
|
|
|
|
$fwdir = scorm_get_preorder($seq->currentactivity);
|
|
|
|
if(array_search ($fwdir, $sco)!== false){
|
|
|
|
foreach ($comtarget as $act){
|
|
$seq = scorm_seq_choice_activity_traversal($act,$userid,$seq,'forward');
|
|
if(!$seq->reachable){
|
|
$seq->delivery = null;
|
|
return $seq;
|
|
}
|
|
$act = scorm_get_sco($act->id);
|
|
if(scorm_seq_is('active',$act->id,$userid) && ($act->id != $comancestor->id && ($act->preventactivation == true))){
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.9-6';
|
|
return $seq;
|
|
}
|
|
}
|
|
|
|
}
|
|
else{
|
|
foreach ($comtarget as $act){
|
|
$act = scorm_get_sco($act->id);
|
|
if(scorm_seq_is('active',$act->id,$userid) && ($act->id != $comancestor->id && ($act->preventactivation==true))){
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.9-6';
|
|
return $seq;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
if(scorm_is_leaf ($sco)){
|
|
$seq->delivery = $sco;
|
|
$seq->exception = 'SB.2.9-6';
|
|
return $seq;
|
|
}
|
|
|
|
$seq = scorm_seq_flow ($sco,'forward',$seq,true,$userid);
|
|
if ($seq->deliverable == false){
|
|
scorm_terminate_descendent_attempts($comancestor,$userid,$seq);
|
|
scorm_seq_end_attempt($comancestor,$userid,$seq->attempt);
|
|
$seq->currentactivity = $sco;
|
|
$seq->delivery = null;
|
|
$seq->exception = 'SB.2.9-9';
|
|
return $seq;
|
|
|
|
}
|
|
else{
|
|
return $seq;
|
|
}
|
|
|
|
}
|
|
|
|
function scorm_seq_choice_flow ($constrained, $traverse, $seq){
|
|
$seq = scorm_seq_choice_flow_tree ($constrained, $traverse, $seq);
|
|
if ($seq->identifiedactivity == null){
|
|
$seq->identifiedactivity = $constrained;
|
|
return $seq;
|
|
}
|
|
else{
|
|
return $seq;
|
|
}
|
|
}
|
|
|
|
function scorm_seq_choice_flow_tree ($constrained, $traverse, $seq){
|
|
$islast = false;
|
|
$parent = scorm_get_parent ($constrained);
|
|
if ($traverse== 'forward'){
|
|
$preord = scorm_get_preorder ($constrained);
|
|
if (sizeof($preorder) == 0 || (sizeof($preorder) == 0 && $preorder[0]->id = $constrained->id)){ // TODO: undefined
|
|
$islast = true;//the function is the last activity available
|
|
}
|
|
if ($constrained->parent == '/' || $islast){
|
|
$seq->nextactivity = null;
|
|
return $seq;
|
|
}
|
|
$avchildren = scorm_get_available_children ($parent);//available children
|
|
if ($avchildren [sizeof($avchildren)-1]->id == $constrained->id){
|
|
$seq = scorm_seq_choice_flow_tree ($parent, 'forward', $seq);
|
|
return $seq;
|
|
}
|
|
else{
|
|
$i=0;
|
|
while($i < sizeof($avchildren)){
|
|
if ($avchildren [$i]->id == $constrained->id){
|
|
$seq->nextactivity = $avchildren [$i+1];
|
|
return $seq;
|
|
}
|
|
else{
|
|
$i++;
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
if ($traverse== 'backward'){
|
|
if($constrained->parent == '/' ){
|
|
$seq->nextactivity = null;
|
|
return $seq;
|
|
}
|
|
|
|
$avchildren = scorm_get_available_children ($parent);//available children
|
|
if ($avchildren [0]->id == $constrained->id){
|
|
$seq = scorm_seq_choice_flow_tree ($parent, 'backward', $seq);
|
|
return $seq;
|
|
}
|
|
else{
|
|
$i=sizeof($avchildren)-1;
|
|
while($i >=0){
|
|
if ($avchildren [$i]->id == $constrained->id){
|
|
$seq->nextactivity = $avchildren [$i-1];
|
|
return $seq;
|
|
}
|
|
else{
|
|
$i--;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
function scorm_seq_choice_activity_traversal($activity,$userid,$seq,$direction){
|
|
|
|
if($direction == 'forward'){
|
|
|
|
$act = scorm_seq_rules_check($activity,'stopforwardtraversal');
|
|
|
|
if($act != null){
|
|
$seq->reachable = false;
|
|
$seq->exception = 'SB.2.4-1';
|
|
return $seq;
|
|
}
|
|
$seq->reachable = false;
|
|
return $seq;
|
|
}
|
|
|
|
if($direction == 'backward'){
|
|
$parentsco = scorm_get_parent($activity);
|
|
if($parentsco!= null){
|
|
if (isset($parentsco->forwardonly) && ($parentsco->forwardonly == true)){
|
|
$seq->reachable = false;
|
|
$seq->exception = 'SB.2.4-2';
|
|
return $seq;
|
|
}
|
|
else{
|
|
$seq->reachable = false;
|
|
$seq->exception = 'SB.2.4-3';
|
|
return $seq;
|
|
}
|
|
}
|
|
}
|
|
$seq->reachable = true;
|
|
return $seq;
|
|
|
|
}
|
|
|
|
//Delivery Request Process
|
|
|
|
function scorm_sequencing_delivery($scoid,$userid,$seq){
|
|
|
|
if(!scorm_is_leaf ($seq->delivery)){
|
|
$seq->deliveryvalid = false;
|
|
$seq->exception = 'DB.1.1-1';
|
|
return $seq;
|
|
}
|
|
$ancestors = scorm_get_ancestors($seq->delivery);
|
|
$arrpath = array_reverse($ancestors);
|
|
array_push ($arrpath,$seq->delivery);//path from the root to the target
|
|
|
|
if (empty($arrpath)){
|
|
$seq->deliveryvalid = false;
|
|
$seq->exception = 'DB.1.1-2';
|
|
return $seq;
|
|
}
|
|
|
|
foreach ($arrpath as $activity){
|
|
if(scorm_check_activity ($activity,$userid)){
|
|
$seq->deliveryvalid = false;
|
|
$seq->exception = 'DB.1.1-3';
|
|
return $seq;
|
|
}
|
|
}
|
|
|
|
$seq->deliveryvalid = true;
|
|
return $seq;
|
|
|
|
}
|
|
|
|
function scorm_content_delivery_environment ($seq,$userid){
|
|
global $DB;
|
|
|
|
$act = $seq->currentactivity;
|
|
if(scorm_seq_is('active',$act->id,$userid)){
|
|
$seq->exception = 'DB.2-1';
|
|
return $seq;
|
|
}
|
|
$track = $DB->get_record('scorm_scoes_track', array('scoid'=>$act->id,'userid'=>$userid,'element'=>'suspendedactivity'));
|
|
if ($track != null){
|
|
$seq = scorm_clear_suspended_activity($seq->delivery, $seq, $userid);
|
|
|
|
}
|
|
$seq = scorm_terminate_descendent_attempts ($seq->delivery,$userid,$seq);
|
|
$ancestors = scorm_get_ancestors($seq->delivery);
|
|
$arrpath = array_reverse($ancestors);
|
|
array_push ($arrpath,$seq->delivery);
|
|
foreach ($arrpath as $activity){
|
|
if(!scorm_seq_is('active',$activity->id,$userid)){
|
|
if(!isset($activity->tracked) || ($activity->tracked == 1)){
|
|
if(!scorm_seq_is('suspended',$activity->id,$userid)){
|
|
$r = $DB->get_record('scorm_scoes_track', array('scoid'=>$activity->id,'userid'=>$userid,'element'=>'activityattemptcount'));
|
|
$r->value = ($r->value)+1;
|
|
$DB->update_record ('scorm_scoes_track',$r);
|
|
if ($r->value == 1){
|
|
scorm_seq_set('activityprogressstatus', $activity->id, $userid, 'true');
|
|
}
|
|
scorm_insert_track($userid, $activity->scorm, $activity->id, 0, 'objectiveprogressstatus', 'false');
|
|
scorm_insert_track($userid, $activity->scorm, $activity->id, 0, 'objectivesatisfiedstatus', 'false');
|
|
scorm_insert_track($userid, $activity->scorm, $activity->id, 0, 'objectivemeasurestatus', 'false');
|
|
scorm_insert_track($userid, $activity->scorm, $activity->id, 0, 'objectivenormalizedmeasure', 0.0);
|
|
|
|
scorm_insert_track($userid, $activity->scorm, $activity->id, 0, 'attemptprogressstatus', 'false');
|
|
scorm_insert_track($userid, $activity->scorm, $activity->id, 0, 'attemptcompletionstatus', 'false');
|
|
scorm_insert_track($userid, $activity->scorm, $activity->id, 0, 'attemptabsoluteduration', 0.0);
|
|
scorm_insert_track($userid, $activity->scorm, $activity->id, 0, 'attemptexperiencedduration', 0.0);
|
|
scorm_insert_track($userid, $activity->scorm, $activity->id, 0, 'attemptcompletionamount', 0.0);
|
|
}
|
|
}
|
|
scorm_seq_set('active', $activity->id, $userid, 'true');
|
|
}
|
|
}
|
|
$seq->delivery = $seq->currentactivity;
|
|
scorm_seq_set('suspendedactivity', $activity->id, $userid, 'false');
|
|
|
|
//ONCE THE DELIVERY BEGINS (How should I check that?)
|
|
|
|
if(isset($activity->tracked) || ($activity->tracked == 0)){
|
|
//How should I track the info and what should I do to not record the information for the activity during delivery?
|
|
$atabsdur = $DB->get_record('scorm_scoes_track', array('scoid'=>$activity->id,'userid'=>$userid,'element'=>'attemptabsoluteduration'));
|
|
$atexpdur = $DB->get_record('scorm_scoes_track', array('scoid'=>$activity->id,'userid'=>$userid,'element'=>'attemptexperiencedduration'));
|
|
}
|
|
return $seq;
|
|
|
|
|
|
}
|
|
function scorm_clear_suspended_activity($act,$seq, $userid){
|
|
global $DB;
|
|
$currentact= $seq->currentactivity;
|
|
$track = $DB->get_record('scorm_scoes_track', array('scoid'=>$currentact->id,'userid'=>$userid,'element'=>'suspendedactivity')); // TODO: undefined
|
|
if ($track != null){
|
|
$ancestors = scorm_get_ancestors($act);
|
|
$commonpos = scorm_find_common_ancestor($ancestors,$currentact);
|
|
if ($commonpos !== false) {
|
|
if ($activitypath = array_slice($ancestors,0,$commonpos)) {
|
|
if (!empty ($activitypath)){
|
|
|
|
foreach ($activitypath as $activity) {
|
|
if (scorm_is_leaf($activity)){
|
|
scorm_seq_set('suspended',$activity->id,$userid,false);
|
|
}
|
|
else{
|
|
$children = scorm_get_children($activity);
|
|
$bool= false;
|
|
foreach ($children as $child){
|
|
if(scorm_seq_is('suspended',$child->id,$userid)){
|
|
$bool= true;
|
|
}
|
|
}
|
|
if(!$bool){
|
|
scorm_seq_set('suspended',$activity->id,$userid,false);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
scorm_seq_set('suspendedactivity',$act->id,$userid,false);
|
|
|
|
}
|
|
}
|
|
|
|
function scorm_select_children_process($scoid,$userid){
|
|
global $DB;
|
|
|
|
$sco = scorm_get_sco($scoid);
|
|
if (!scorm_is_leaf($sco)){
|
|
if(!scorm_seq_is('suspended',$scoid,$userid) && !scorm_seq_is('active',$scoid,$userid)){
|
|
$r = $DB->get_record('scorm_scoes_track', array('scoid'=>$scoid,'userid'=>$userid,'element'=>'selectiontiming'));
|
|
|
|
switch($r->value) {
|
|
|
|
case 'oneachnewattempt':
|
|
case 'never':
|
|
break;
|
|
|
|
case 'once':
|
|
if(!scorm_seq_is('activityprogressstatus',$scoid,$userid)){
|
|
if(scorm_seq_is('selectioncountsstatus',$scoid,$userid)){
|
|
$childlist = '';
|
|
$res = $DB->get_record('scorm_scoes_track', array('scoid'=>$scoid,'userid'=>$userid,'element'=>'selectioncount'));
|
|
$i = ($res->value)-1;
|
|
$children = scorm_get_children ($sco);
|
|
|
|
while ($i>=0){
|
|
$pos = array_rand($children);
|
|
array_push($childlist,$children [$pos]);
|
|
array_splice($children,$pos,1);
|
|
$i--;
|
|
}
|
|
sort ($childlist);
|
|
$clist = serialize ($childlist);
|
|
scorm_seq_set('availablechildren', $scoid, $userid, false);
|
|
scorm_seq_set('availablechildren', $scoid, $userid, $clist);
|
|
|
|
|
|
}
|
|
}
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
function scorm_randomize_children_process($scoid,$userid){
|
|
global $DB;
|
|
|
|
$sco = scorm_get_sco($scoid);
|
|
if (!scorm_is_leaf($sco)){
|
|
if(!scorm_seq_is('suspended',$scoid,$userid) && !scorm_seq_is('active',$scoid,$userid)){
|
|
$r = $DB->get_record('scorm_scoes_track', array('scoid'=>$scoid,'userid'=>$userid,'element'=>'randomizationtiming'));
|
|
|
|
switch($r->value) {
|
|
|
|
|
|
case 'never':
|
|
break;
|
|
|
|
case 'oneachnewattempt':
|
|
case 'once':
|
|
if(!scorm_seq_is('activityprogressstatus',$scoid,$userid)){
|
|
if(scorm_seq_is('randomizechildren',$scoid,$userid)){
|
|
$childlist = array();
|
|
$res = scorm_get_available_children($sco);
|
|
$i = sizeof($res)-1;
|
|
$children = $res->value;
|
|
|
|
while ($i>=0){
|
|
$pos = array_rand($children);
|
|
array_push($childlist,$children [$pos]);
|
|
array_splice($children,$pos,1);
|
|
$i--;
|
|
}
|
|
|
|
$clist = serialize ($childlist);
|
|
scorm_seq_set('availablechildren', $scoid, $userid, false);
|
|
scorm_seq_set('availablechildren', $scoid, $userid, $clist);
|
|
|
|
|
|
}
|
|
}
|
|
break;
|
|
|
|
|
|
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
function scorm_terminate_descendent_attempts ($activity,$userid,$seq){
|
|
$ancestors = scorm_get_ancestors($seq->currentactivity);
|
|
$commonpos = scorm_find_common_ancestor($ancestors,$activity);
|
|
if ($commonpos !== false) {
|
|
if ($activitypath = array_slice($ancestors,1,$commonpos-2)) {
|
|
if (!empty ($activitypath)){
|
|
|
|
foreach ($activitypath as $sco) {
|
|
scorm_seq_end_attempt($sco,$userid,$seq->attempt);
|
|
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
function scorm_sequencing_exception($seq){
|
|
global $OUTPUT;
|
|
if($seq->exception != null){
|
|
switch($seq->exception){
|
|
|
|
case 'NB.2.1-1':
|
|
echo $OUTPUT->notification("Sequencing session has already begun");
|
|
break;
|
|
case 'NB.2.1-2':
|
|
echo $OUTPUT->notification("Sequencing session has not begun");
|
|
break;
|
|
case 'NB.2.1-3':
|
|
echo $OUTPUT->notification("Suspended activity is not defined");
|
|
break;
|
|
case 'NB.2.1-4':
|
|
echo $OUTPUT->notification("Flow Sequencing Control Model Violation");
|
|
break;
|
|
case 'NB.2.1-5':
|
|
echo $OUTPUT->notification("Flow or Forward only Sequencing Control Model Violation");
|
|
break;
|
|
case 'NB.2.1-6':
|
|
echo $OUTPUT->notification("No activity is previous to the root");
|
|
break;
|
|
case 'NB.2.1-7':
|
|
echo $OUTPUT->notification("Unsupported Navigation Request");
|
|
break;
|
|
case 'NB.2.1-8':
|
|
echo $OUTPUT->notification("Choice Exit Sequencing Control Model Violation");
|
|
break;
|
|
case 'NB.2.1-9':
|
|
echo $OUTPUT->notification("No activities to consider");
|
|
break;
|
|
case 'NB.2.1-10':
|
|
echo $OUTPUT->notification("Choice Sequencing Control Model Violation");
|
|
break;
|
|
case 'NB.2.1-11':
|
|
echo $OUTPUT->notification("Target Activity does not exist");
|
|
break;
|
|
case 'NB.2.1-12':
|
|
echo $OUTPUT->notification("Current Activity already terminated");
|
|
break;
|
|
case 'NB.2.1-13':
|
|
echo $OUTPUT->notification("Undefined Navigation Request");
|
|
break;
|
|
|
|
case 'TB.2.3-1':
|
|
echo $OUTPUT->notification("Current Activity already terminated");
|
|
break;
|
|
case 'TB.2.3-2':
|
|
echo $OUTPUT->notification("Current Activity already terminated");
|
|
break;
|
|
case 'TB.2.3-4':
|
|
echo $OUTPUT->notification("Current Activity already terminated");
|
|
break;
|
|
case 'TB.2.3-5':
|
|
echo $OUTPUT->notification("Nothing to suspend; No active activities");
|
|
break;
|
|
case 'TB.2.3-6':
|
|
echo $OUTPUT->notification("Nothing to abandon; No active activities");
|
|
break;
|
|
|
|
case 'SB.2.1-1':
|
|
echo $OUTPUT->notification("Last activity in the tree");
|
|
break;
|
|
case 'SB.2.1-2':
|
|
echo $OUTPUT->notification("Cluster has no available children");
|
|
break;
|
|
case 'SB.2.1-3':
|
|
echo $OUTPUT->notification("No activity is previous to the root");
|
|
break;
|
|
case 'SB.2.1-4':
|
|
echo $OUTPUT->notification("Forward Only Sequencing Control Model Violation");
|
|
break;
|
|
|
|
case 'SB.2.2-1':
|
|
echo $OUTPUT->notification("Flow Sequencing Control Model Violation");
|
|
break;
|
|
case 'SB.2.2-2':
|
|
echo $OUTPUT->notification("Activity unavailable");
|
|
break;
|
|
|
|
case 'SB.2.3-1':
|
|
echo $OUTPUT->notification("Forward Traversal Blocked");
|
|
break;
|
|
case 'SB.2.3-2':
|
|
echo $OUTPUT->notification("Forward Only Sequencing Control Model Violation");
|
|
break;
|
|
case 'SB.2.3-3':
|
|
echo $OUTPUT->notification("No activity is previous to the root");
|
|
break;
|
|
|
|
case 'SB.2.5-1':
|
|
echo $OUTPUT->notification("Sequencing session has already begun");
|
|
break;
|
|
|
|
case 'SB.2.6-1':
|
|
echo $OUTPUT->notification("Sequencing session has already begun");
|
|
break;
|
|
case 'SB.2.6-2':
|
|
echo $OUTPUT->notification("No Suspended activity is defined");
|
|
break;
|
|
|
|
case 'SB.2.7-1':
|
|
echo $OUTPUT->notification("Sequencing session has not begun");
|
|
break;
|
|
case 'SB.2.7-2':
|
|
echo $OUTPUT->notification("Flow Sequencing Control Model Violation");
|
|
break;
|
|
|
|
case 'SB.2.8-1':
|
|
echo $OUTPUT->notification("Sequencing session has not begun");
|
|
break;
|
|
case 'SB.2.8-2':
|
|
echo $OUTPUT->notification("Flow Sequencing Control Model Violation");
|
|
break;
|
|
|
|
case 'SB.2.9-1':
|
|
echo $OUTPUT->notification("No target for Choice");
|
|
break;
|
|
case 'SB.2.9-2':
|
|
echo $OUTPUT->notification("Target Activity does not exist or is unavailable");
|
|
break;
|
|
case 'SB.2.9-3':
|
|
echo $OUTPUT->notification("Target Activity hidden from choice");
|
|
break;
|
|
case 'SB.2.9-4':
|
|
echo $OUTPUT->notification("Choice Sequencing Control Model Violation");
|
|
break;
|
|
case 'SB.2.9-5':
|
|
echo $OUTPUT->notification("No activities to consider");
|
|
break;
|
|
case 'SB.2.9-6':
|
|
echo $OUTPUT->notification("Unable to activate target; target is not a child of the Current Activity");
|
|
break;
|
|
case 'SB.2.9-7':
|
|
echo $OUTPUT->notification("Choice Exit Sequencing Control Model Violation");
|
|
break;
|
|
case 'SB.2.9-8':
|
|
echo $OUTPUT->notification("Unable to choose target activity - constrained choice");
|
|
break;
|
|
case 'SB.2.9-9':
|
|
echo $OUTPUT->notification("Choice Request Prevented by Flow-only Activity");
|
|
break;
|
|
|
|
case 'SB.2.10-1':
|
|
echo $OUTPUT->notification("Sequencing session has not begun");
|
|
break;
|
|
case 'SB.2.10-2':
|
|
echo $OUTPUT->notification("Current Activity is active or suspended");
|
|
break;
|
|
case 'SB.2.10-3':
|
|
echo $OUTPUT->notification("Flow Sequencing Control Model Violation");
|
|
break;
|
|
|
|
case 'SB.2.11-1':
|
|
echo $OUTPUT->notification("Sequencing session has not begun");
|
|
break;
|
|
case 'SB.2.11-2':
|
|
echo $OUTPUT->notification("Current Activity has not been terminated");
|
|
break;
|
|
|
|
case 'SB.2.12-2':
|
|
echo $OUTPUT->notification("Undefined Sequencing Request");
|
|
break;
|
|
|
|
case 'DB.1.1-1':
|
|
echo $OUTPUT->notification("Cannot deliver a non-leaf activity");
|
|
break;
|
|
case 'DB.1.1-2':
|
|
echo $OUTPUT->notification("Nothing to deliver");
|
|
break;
|
|
case 'DB.1.1-3':
|
|
echo $OUTPUT->notification("Activity unavailable");
|
|
break;
|
|
|
|
case 'DB.2-1':
|
|
echo $OUTPUT->notification("Identified activity is already active");
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
}
|