Team:Cambridge-JIC/Assets/Quiz js

           quiz = function(elem){
               this.elem = $(elem);
               this.steps = [];

               this.step = function(question, answers) {
                   this.question = question;
                   this.answers = {};
                   this.bind = function(target, keys) {
                       if (typeof keys === "undefined") {
                           keys = Object.keys(this.answers);
                       }

                       for (var i=0; i<keys.length; i++) {
                           key = keys[i];
                           this.answers[key].target = target;
                       }
                   };
                   this.elem = function(quiz, index) {

elem = $('

'); elem.append($('

').text(this.question)); for (key in this.answers) { elem.append($('

')

                               .text(this.answers[key].answer)
                               .data("key", key)
                               .data("step", this)
                               .data("quiz", quiz)
                               .data("index", index)
                               .click(function(){
                                   key = $(this).data("key");
                                   step = $(this).data("step");
                                   quiz = $(this).data("quiz");
                                   index = $(this).data("index");
                                   ref = quiz.steps[index];
                                   ref.elem.find('.cam-quiz-selected').removeClass('cam-quiz-selected');
                                   $(this).addClass('cam-quiz-selected');

                                   for (var i=quiz.steps.length; --i>index;) {
                                       quiz.steps[i].elem.remove();
                                       quiz.steps.pop();
                                   }

                                   quiz.steps[index].option = key;
                                   nstep = step.answers[key].target;
                                   switch (typeof nstep) {
                                       case "object":
                                           var nindex = quiz.steps.length;
                                           var nref = {
                                               'step': nstep,
                                               'elem': nstep.elem(quiz, nindex),
                                               'option': undefined
                                           };
                                           quiz.steps.push(nref);
                                           quiz.elem.append(nref.elem);
                                           break;
                                       case "function":
                                           options = [];
                                           for (var i=0; i<quiz.steps.length; i++) {
                                               options.push(quiz.steps[i].option);
                                           }
                                           var nref = {
                                               'step': undefined,

'elem': $('

')

                                                   .append(nstep(options)),
                                               'option': undefined
                                           };
                                           quiz.steps.push(nref);
                                           quiz.elem.append(nref.elem);
                                           break;
                                       default:
                                           alert("Quiz error! Please contact the site maintainers....");
                                           break;
                                   }
                               }));
                       }
                       return elem;
                   };

                   for (key in answers) {
                       answer = answers[key];
                       this.answers[key] = {
                           'answer': answer,
                           'target': undefined
                       };
                   }
               };

               this.start = function(step) {
                   index = this.steps.length;
                   ref = {
                       'step': step,
                       'elem': step.elem(this, index),
                       'option': undefined
                   };
                   this.steps.push(ref);
                   this.elem.append(ref.elem);
               };

};