gistfile1.txt

  def patient_payers(type, id, range, filters)
    Map<Integer, Integer> payerTable = new HashMap<>();

    List<Patient> patientsInDateRange = patients(type, id, range, filters);
    // Iterate on the patients
    for (Patient patient : patientsInDataRange) {
       // Iterate on the payers
       for (Payer payer : patient.getPayers()) {
         if (payer.isActive()) {
             if (payerTable.containsKey(payer.Id)) {
                 payerTable.put(payer, 1);
              } else {
                Integer existingCount = payerTable.get(existing);
                payerTable.put(payer, existingCount == null ? 1 : existingCount++);
               }
          } 
       }
       }

     return payerTable;

    }
  end

  def isPayerActive(payer, range) {
    PayerHistory[] histories = payer.active_history;
    boolean isActive = false;
    for (PayerHistory history : histories) {
      PayerHistory trueBeforeRange = null;
      if (history.beforeTime(range.begin)) {
        if (history.value) {
           trueBeforeRange = history;
        } else {
        }
      } else {
          if (trueBeforeRange != null) {
            // We assume this is a false (we can assert it) so we have a true -> false range that includes the tranisiotn period.
              return true;
          }

          // If before end of range and and true => return true
          if (history.beforeTime(range.end) && history value) {
            return true;
          }

          if (history.afterOrEqualTime(range.end)) {
            return false;
          }

      }
    }

    return trueBeforeRange == null;

    }


    return isActive;

  }