bob.js

BobController = function(button,inputText,output) {
  console.log("Setting up the Bob Controller");
  this.button = $(button);
  this.input = $(inputText);
  this.output = $(output);

  var that = this;

  this.getStatement = function() {
    return this.input.val();
  }

  this.appendResponse = function(response) {
    var outputResponse = "<li>" + response + "</li>";
    this.output.append(outputResponse);
  }

  this.button.on("click",function(e) {
    e.preventDefault();
    var bob = new Bob();
    var response = bob.hey(that.getStatement());
    that.appendResponse(response);
  });
};

Bob = function() {

  this.hey = function(message) {
    if (this.isSilence(message)) {
      return "Fine, be that way.";
    } else if (this.isShouting(message)) {
      return "Woah, chill out!";
    } else if (this.isAQuestion(message)) {
      return "Sure";
    } else {
      return 'Whatever';
    }
  };

  this.isSilence = function(message) {
    return message === "";
  }

  this.isShouting = function(message) {
    return message.toUpperCase() === message;
  }

  this.isAQuestion = function(message) {
    return message[message.length -1] === "?";
  }
};

$(function() {

  var bobController = new BobController('#askBob','#askBobText','#bobResponses');

});