UtilFuncs.h

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#ifndef DQMOffline_Trigger_UtilFuncs_h
#define DQMOffline_Trigger_UtilFuncs_h

#include "FWCore/Common/interface/TriggerNames.h"
#include "FWCore/Utilities/interface/RegexMatch.h"
#include "DataFormats/Common/interface/Handle.h"
#include "DataFormats/Common/interface/TriggerResults.h"
#include "DataFormats/HLTReco/interface/TriggerObject.h"
#include "DataFormats/HLTReco/interface/TriggerTypeDefs.h"
#include "DataFormats/HLTReco/interface/TriggerEvent.h"
#include "DataFormats/Math/interface/deltaR.h"

namespace hltdqm {  
  bool passTrig(const float objEta,float objPhi, const trigger::TriggerEvent& trigEvt,
        const std::string & filterName,const std::string& processName){
    constexpr float kMaxDR2 = 0.1*0.1;
    
    edm::InputTag filterTag(filterName,"",processName); 
    trigger::size_type filterIndex = trigEvt.filterIndex(filterTag); 
    if(filterIndex<trigEvt.sizeFilters()){ //check that filter is in triggerEvent
      const trigger::Keys& trigKeys = trigEvt.filterKeys(filterIndex); 
      const trigger::TriggerObjectCollection & trigObjColl(trigEvt.getObjects());
      for(unsigned short trigKey : trigKeys){ 
    const trigger::TriggerObject& trigObj = trigObjColl[trigKey];
    if(reco::deltaR2(trigObj.eta(),trigObj.phi(),objEta,objPhi)<kMaxDR2) return true;
      }
    }
    return false;
  }

  //empty filters is auto pass
  bool passTrig(const float objEta,float objPhi, const trigger::TriggerEvent& trigEvt,
        const std::vector<std::string>& filterNames,bool orFilters,const std::string& processName){
    if(orFilters){
      if(filterNames.empty()) return true; //auto pass if empty filters
      for(auto& filterName : filterNames){
    if(passTrig(objEta,objPhi,trigEvt,filterName,processName)==true) return true;
      }
      return false;
    }else{   
      for(auto& filterName : filterNames){
    if(passTrig(objEta,objPhi,trigEvt,filterName,processName)==false) return false;
      }
      return true;
    }
  }

   //inspired by https://github.com/cms-sw/cmssw/blob/fc4f8bbe1258790e46e2d554aacea15c3e5d9afa/HLTrigger/HLTfilters/src/HLTHighLevel.cc#L124-L165
   //triggers are ORed together
   //empty pattern is auto pass
  bool passTrig(const std::string& trigPattern,const edm::TriggerNames& trigNames,const edm::TriggerResults& trigResults){
    
    if(trigPattern.empty()) return true;
    
    std::vector<std::string> trigNamesToPass;
    if(edm::is_glob(trigPattern)){
     
      //matches is vector of string iterators
      const auto& matches = edm::regexMatch(trigNames.triggerNames(),trigPattern);
      for(auto& name : matches) trigNamesToPass.push_back(*name);
    }else{
      trigNamesToPass.push_back(trigPattern); //not a pattern, much be a path
    }
    for(auto& trigName : trigNamesToPass){
      size_t pathIndex = trigNames.triggerIndex(trigName);
      if(pathIndex<trigResults.size() && 
     trigResults.accept(pathIndex)) return true; 
    }
    
    return false;
  }
  
 
}

#endif