function fetchNextAction($planList)
{
//There is a bug in PHP
//When trying to process very large objects it side effects the values!
//To overcome this we must enforce a copy is made and then use this instead!
$localPlanList = array();
$planListSize = sizeof($planList);
for ($index = 0; $index < $planListSize; $index++) {
$localPlanList[$index] = new graphPlan();
$localPlanList[$index] = $planList[$index];
}
$possibleActions = array();
$actionCollection = array();
//We have not reached the goal state
if ($possibleActions = planComparison::compareActions($localPlanList, false)) {
//We have not reached a decision point
if (!planComparison::conditionalAction($possibleActions)) {
//This is only one action
$currentAction = $possibleActions[0]->getAction();
$nodeData = $currentAction->getData();
array_push($actionCollection, $nodeData[0]);
} else {
// Conditional action encountered
systemMessages::message("Plan decision point encountered");
//Only consider the first packet
$currentAction = $possibleActions[0]->getAction();
$nodeData = $currentAction->getData();
array_push($actionCollection, $nodeData[0]);
}
} else {
// Goal node reached
systemMessages::message("GoalNode!");
}
return array($possibleActions, $actionCollection);
}
/**
* @return void
* @param $planList Array of planCollections
* @desc compares Actions
*/
function compareActions($planList, $updateHistory)
{
//Find a list of Action Packets
$currentActions = planComparison::findNextActions($planList, $updateHistory);
// [ACTION, Plan-i] , [ACTION, Plan-i+1]
// [ACTION-Plan-i,Plan-i+1]
//Merge relevant Action Packets
$mergedActionPackets = planComparison::composeActions($currentActions);
return $mergedActionPackets;
}
function processLoop($planGraphList, $workflowID)
{
//Find the next Actions
$possibleActions = planComparison::compareActions($planGraphList, false);
$loopResult = actionPacket::checkActionPacketsForLoop($possibleActions);
if ($loopResult['loop']) {
//Check to see if we are looping
systemMessages::message("Workflow is Looping!");
$planGraphList = graphPlanDatabaseAccess::getPlanState($workflowID, $loopResult['formName']);
graphPlanDatabaseAccess::updatePlanGraphList($workflowID, $planGraphList);
$possibleActions = planComparison::compareActions($planGraphList, false);
}
return $possibleActions;
}
