gistfile1.txt

var _self = {};

 _self.find_rule= function(param){
    return new Promise(function(resolve, reject){
      var template=[];
        async.each(data, function(value) {
          async.forEachOf(value.templates, function (rule, key) {
            if(rule.id== param){
              template.push({"categoryName": value.name, rule});
            }
          });
        });
      if(template.length === 0){
        return reject(new Error("rule no found"));
      }
      resolve(template);
    });
  };

  _self.categories= function(rule){
    return new Promise(function(resolve,reject){
      let categories=[];
      async.forEachOf(data, function (value, key, callback) {
          async.each(value.templates, function(i){
            async.each(i.categories, function(x){
              if(x == rule[0].categoryName){
                categories.push(i);
              }
            });
          });
         return callback();
      }, function (err) {
        if (err) {
          return reject(err.message);
        }
        resolve([{rule,"categories":categories}]);
      });
    });
  };
  
  module.exports= _self;

gistfile2.txt

router.get('/rules/:ruleId', function(req, res) {
  RulesServices.find_rule(req.params.ruleId)
  .then(function(rule){
    RulesServices.categories(rule)
    .then(function(data){
      sendJSONresponse(res,200, data);
    });
  }).catch(function(err){
    sendJSONresponse(res,404, {"message":err.message});
  });
})