public class CampaignTriggerHandler{
 
   public static void updateOpportunityStatus(Set<Id> campaignIds){
 
       List<Opportunity> oppListUpdated = new List<Opportunity>();
 
       List<Opportunity> oppHasLineItemsWithCampaigns = [Select Id,CampaignId,Status,
                                            (Select Id FROM OpportunityLineItems)
                                            FROM Opportunity
                                            WHERE CampaignId IN: campaignIds];  // opportunity with associated campaign and has line items
 
       for(Opportunity opp: oppHasLineItemsWithCampaigns)
       {
           if(!oppWithCampaigns.isEmpty() && opp.OpportunityLineItems != 0){
                opp.Status = 'Closed Won';
                oppListUpdated.add(opp);
            }
           else{
                opp.Status = 'Closed Lost';
                oppListUpdated.add(opp);
            }
       }
        if(!oppListUpdated.isEmpty()){
              update oppListUpdated;
         }
 
   }
}

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