dimi

public class MaintenanceRequestHelper {
    
    public static void updateWorkOrders(List<Case> caseList){
    Map<Id, Case> caseToNewCaseMap = new Map<Id, Case>();
    
       for(Case caseInstance : caseList)
       {
           Case oldCase = (case)Trigger.oldMap.get(caseInstance.Id);
           
           if(caseInstance.Status == 'Closed' && oldCase.Status != 'Closed' && (caseInstance.Type == 'Repair' || caseInstance.Type == 'Routine Maintenance'))
           {
                      Case newCase = caseInstance.clone(false);
           
           newCase.Date_Reported__c = Date.today(); 
           newCase.Status = 'New'; 
           newCase.Type = 'Routine Maintenance';
           
           caseToNewCaseMap.put(caseInstance.Id, newCase);
           }
       }
       
       insert caseToNewCaseMap.values();
       
       List<Work_Part__c> workPartList = [SELECT Id, Equipment__c FROM Work_Part__c WHERE Maintenance_Request__c IN :caseToNewCaseMap.keySet() ORDER BY Equipment__r.Maintenance_Cycle__c];
       
       List<Work_Part__c> newWorkPartList = new List<Work_Part__c>();
       Set<Id> caseIds = new Set<Id>();
       
       for(Work_Part__c workPart : workPartList)
       {
           Work_Part__c newWorkPart = workPart.clone(false);
           
           Case newCase = caseToNewCaseMap.get(workPart.Maintenance_Request__c);
           
           newWorkPart.Maintenance_Request__c = newCase.Id;
           
           newWorkPartList.add(newWorkPart);
           
           if(!caseIds.contains(workPart.Maintenance_Request__c))
           {
           newCase.Date_DUe__c = Date.today().addDays((Integer)workPart.Equipment__r.Maintenance_Cycle__c);
           
           caseIds.add(workPart.Maintenance_Request__c);
           }
       }
       
       update caseToNewCaseMap.values();
    }        
    
}