Question

I have a class being used in node.js, and I want to pass various objects to this when requiring it.

Here’s the class:

    var ItemHandler = (function() {

          var items = new Array();

          return { 
            start: function (item, callback) {

                items.push(item);
                ItemHandler.timer();

            },
            timer: function () {

                var timer = setTimeout(function() {

                    console.log('test');
                    ItemHandler.timer();

                }, 1000);
            }
          };
        })();

module.exports = ItemHandler;

This is being called in one my routes, index.js. Like this:

var itemHandler = require('./lib/item.handler.js');
itemHandler.start(items);

What I would like to do is pass other objects being used in my route, to this file. Similar to this:

var itemHandler = require('./lib/item.handler.js')(socket)(res);

Here, I’d be passing in the socket object (returned from a socket.io connection and a response).

How would I structure my class to accept those two parameters?

Thanks a lot!

Answer 1

function ItemHandler(param) {
  var items = new Array();

  ItemHandler.start = function (item, callback) {
    items.push(item);
    ItemHandler.timer();
  };

  ItemHandler.timer = function () {
    var timer = setTimeout(function() {
      console.log('test');
      ItemHandler.timer();
    }, 1000);
  }

  return ItemHandler;
};

module.exports = ItemHandler;

ItemHandler is now a function so…

var itemHandler = require('./lib/item.handler.js')(socket)(res);
itemHandler.start(items);

Or:

var itemHandler = require('./lib/item.handler.js');
itemHandler(socket)(res).start(items);

Hope it works, haven’t tested it 🙂