quiz_bot.js

// quiz bot
var retrieveAnswerKey = function () {
	return JSON.parse(localStorage.getItem('answerKey'));
}
var localStorageExists = function () {
	var a_key = retrieveAnswerKey();
	if (typeof a_key !== "undefined" && a_key && a_key.length > 0) {
		return true;
	} else {
		return false;
	}
}

var answer_key = localStorageExists() ? retrieveAnswerKey() : [];

var wrongAnswer = function (qid, aid) {
	for (var i = 0; i < answer_key.length; i  ) {
		var q = answer_key[i];
		if (qid == q.q_id) {
			return q.incorrects.indexOf(aid) > -1;
		}
	}
	return false;
};

var qidInAnswerkey = function (qid) {
	for (var i = 0; i < answer_key.length; i  ) {
		var q = answer_key[i];
		if (qid == q.q_id) {
			return true;
		}
	}
	return false;
};

function runBot(options) { // add 'practice_test': boolean
	$('.display_question').each(function (index, value) {
		var question_id = $(value).attr('id').split('_')[1],
			question_text = $(value).find('.question_'   question_id   'question_text').text().trim();
		if (options['first_time'] === true) {
			// console.log('FIRST TIME THROUGH');
			var input = $(value).find('.answer_input > input')[0];
			if (input) {
				var answer_id = input.value;
				$('#question_'   question_id   '_answer_'   answer_id).click().attr('checked', 'checked');
			} else {
				//We have a matching choice!
				$(value).find('.answer > div > select').each(function (index, select) {
					var firstOption = $(select).find('option')[1].value; //index 0 is always '[ Choose ]'
					$(select).val(firstOption).change();
				});
			}
		} else if (qidInAnswerkey(question_id)) {
			// console.log('QUESTION ID IS IN ANSWER KEY');
			for (var i = 0; i < answer_key.length; i  ) {
				if (answer_key[i].is_matching) {
					$('#question_'   answer_key[i].q_id   '_answer_'   answer_key[i].a_id).val(answer_key[i].match).change();
				} else {
					if (question_id == answer_key[i].q_id) {
						if (answer_key[i].correct) {
							// console.log('MARK AS CORRECT');
							$('#question_'   answer_key[i].q_id   '_answer_'   answer_key[i].a_id).click().attr('checked', 'checked');
						} else {
							// console.log('IN BUT NOT CORRECT FIND ONE THAT WORKS');
							var alreadySelected = false;
							$(value).find('.answer_input > input').each(function (index, inside) {
								var answer_id = $(inside).attr('value');
								if (!wrongAnswer(question_id, answer_id) && !alreadySelected) {
									$('#question_'   question_id   '_answer_'   answer_id).click().attr('checked', 'checked');
									alreadySelected = true;
								}
							});
						}
					}
				}

			}
		} else if (options['practice_test'] === true) {
			console.log('answer this one yourself: it\'s blank');
		} else {
			var input = $(value).find('.answer_input > input')[0];
			if (input) {
				var answer_id = input.value;
				$('#question_'   question_id   '_answer_'   answer_id).click().attr('checked', 'checked');
			}
		}
	});
}

if (answer_key.length == 0) {
	runBot({ 'first_time': true, 'practice_test': true });
} else {
	runBot({ 'first_time': false, 'practice_test': false });
}