trigger TaskAfterUpdate on Task (after update) {
/* 

-- -----------  ---------------------------------------
-- AP03         Code to set case status 'All task Closed' if 
--              case if closed and all task of the case is 
                closed.
----------------------------------------------------------------------
**********************************************************************
*/
  System.Debug('## >>> Start of TaskAfterUpdate <<< run by ' + UserInfo.getName());
  //variable  
  //Bypass__c userBypass = Bypass__c.getInstance(UserInfo.getUserId());
  String caseKeyPrefix = AP_Constants.CaseKeyPrefix;
  map<Id,Case> MapCaseIdOfTask = new map<Id,Case>(); //AP03
  map<Id,Case> MapCaseIdOfPendingTask = new map<Id,Case>(); //AP03
  Set<String> setTaskKey = new set<String>(); //AP03
  
  list<Task> listTask = new list<Task>();//AP04
  set<id> setCaseId = new set<id>();
      
    set<id> AP09CaseId= new set<id>();
    list<Task> AP09listTaskClosed= new list<Task>();
  
  //AP10
  set<Id> caseIdSet = new set<Id>();
  list<Task> taskList = new list<Task>();

  for (Integer i=0;i < trigger.size ;i++){
    if(PAD.canTrigger('AP09')){
            if(trigger.new[i].status  != trigger.old[i].status  
                && !trigger.new[i].isclosed
                && trigger.new[i].whatId != null
                && String.ValueOf(trigger.new[i].whatId).startsWith(caseKeyPrefix)
                ){
                    AP09listTaskClosed.add(trigger.new[i]);
                    AP09CaseId.add(trigger.new[i].whatId);