Parsing Box Webhook JSON

main();
function main(){
  var json;
  try {
  json = JSON.parse(engine.findDataByNumber(configs.get("Json")));
  } catch (e){
    throw "I1 is not JSON";
  }
  if (json == null){
    throw "No JSON";
  }
  var objectName = configs.get("ObjectName");
  var objectId = configs.get("ObjectID");
  var time = configs.get("Time");
  var userName = configs.get("UserName");
  var pathId = configs.get("PathinfoID");
  var pathName = configs.get("PathinfoName");
  var trigger = configs.get("Trigger");
  timeToJava(json,time);
  UserNm(json,userName);
  triggerSet(json,trigger)
  objectIN(json,objectName,objectId);
  pathinfo(json,pathId,pathName);

}

function objectIN(json,objectName,objectId){
  var id = "";
  var name = "";
  if (json.source == null){
    return;
  }
  if (json.source.item != null){
    if (json.source.item.id != null){
      id = json.source.item.id;
      if (Object.prototype.toString.call(id).slice(8, -1) != "String"){
          throw "source.item.id is not string";
      }
      if (id == ""){
        throw "source.item.id is blank string";
      }
      if (objectId != ""){
        engine.setDataByNumber(objectId,id);
      }
    }
    if (json.source.item.name != null){
      name = json.source.item.name;
      if (Object.prototype.toString.call(name).slice(8, -1) != "String"){
        throw "source.item.name is not string";
      }
      if (name == ""){
        throw "source.item.name is blank string";
      }
      if (objectName != ""){
        engine.setDataByNumber(objectName,name);
      }
    }
  }else{
    if(json.source.id != null){
      id = json.source.id;
      if (Object.prototype.toString.call(id).slice(8, -1) != "String"){
        throw "source.id is not string";
      }
      if (id == ""){
        throw "source.id is blank string";
      }
      if (objectId != ""){
        engine.setDataByNumber(objectId,id);
      }
    }
    if (json.source.name != null){
      name = json.source.name;
      if (Object.prototype.toString.call(name).slice(8, -1) != "String"){
        throw "source.name is not string";
      }
      if (name == ""){
        throw "source.item.name is blank string";
      }
      if (objectName != ""){
        engine.setDataByNumber(objectName,name);
      }
    }
  }
}

function UserNm(json,userName){
  var name = "";
  if (json.created_by == null){
    return;
  }
  if(json.created_by.name == null){
    return;
  }
  name = json.created_by.name;
  if (typeof name != "string"){
    throw "created_by.name is not string";
  }
  if (name == ""){
    throw "created_by.name is blank string";
  }    
  if (userName != ""){
    engine.setDataByNumber(userName,name);
  }
}

function triggerSet(json,trigger){
  var triggerName = "";
  if (json.trigger == null){
    return;
  }
  triggerName = json.trigger;
  if (Object.prototype.toString.call(triggerName).slice(8, -1) != "String"){
    throw "trigger is not string";
  }
  if (triggerName == ""){
    throw "trigger is blank string";
  }
  if (trigger != ""){
    engine.setDataByNumber(trigger,triggerName);
  }
}

function timeToJava(json,createdTime){
  if (json.created_at == null){
    return;
  }
  var createdAt_tmp = json.created_at;
  if (createdAt_tmp == ""){
    throw "created_at is blank string"; 
  }
  var dateFormat = new java.text.SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX");
  try {
    var datetime = dateFormat.parse(createdAt_tmp);
  } catch(e) {
    throw "created_at must be 'YYYY-MM-DDThh:mm:ss-07:00'";
  }
  if (createdTime != ""){
    engine.setDataByNumber(createdTime,new java.sql.Timestamp(datetime.getTime()));
  }
}

function pathinfo(json,pathId,pathName){
  if (json.source.path_collection == null){
    return;
  }
  if (json.source.path_collection.entries == null){
    return;
  }
  var roots = json.source.path_collection.entries;
  if(!Array.isArray(roots)){
    throw "source.path_collection.entries must be array";
  }
  if(roots.length == 0){
    throw "source.path_collection.entries is empty";
  } 
  var foldersName = "";
  var foldersID = "";
  for (var i = 0; i < roots.length;i++){
    if (Object.prototype.toString.call(roots[i]).slice(8, -1) != "Object"){
      throw "Only Javascript Object can be in source.path_collection.entries";
    }
    if (roots[i].name == null){
      throw "Javascript Object without name property is in source.path_collection.entries";
    }
    if (Object.prototype.toString.call(roots[i].name).slice(8, -1) != "String"){
      throw "Javascript Object with no-string name property is in source.path_collection.entries";
    }
    foldersName += roots[i].name + "\n";
    if (roots[i].id == null){
      throw "Javascript Object without id property is in source.path_collection.entries";
    }
    if (Object.prototype.toString.call(roots[i].id).slice(8, -1) != "String"){
      throw "Javascript Object with no-string id property is in source.path_collection.entries";
    }
    foldersID += roots[i].id + "\n";
  }
  if (pathId != ""){
    engine.setDataByNumber(pathId,foldersID.trim());
  }
  if (pathName != ""){
    engine.setDataByNumber(pathName,foldersName.trim());
  }
}