quiz project lynda side

index.html

@@ -39,7 +39,7 @@ <h1>JavaScript Quiz</h1>
           <div id="result"></div>
         </div>
         <!-- The below 'Restart Quiz' button is commented out because it is not used initially -->
-        <!-- <button id="restartButton" class="button-secondary">Restart Quiz</button> -->
+        <button id="restartButton" class="button-secondary">Restart Quiz</button>
       </div>
     </div>
 

src/index.js

@@ -10,7 +10,7 @@ document.addEventListener("DOMContentLoaded", () => {
   const questionContainer = document.querySelector("#question");
   const choiceContainer = document.querySelector("#choices");
   const nextButton = document.querySelector("#nextButton");
-
+  const restartButton = document.querySelector('#restartButton');
   // End view elements
   const resultContainer = document.querySelector("#result");
 
@@ -55,17 +55,39 @@ document.addEventListener("DOMContentLoaded", () => {
 
   // Show first question
   showQuestion();
+
+
 
 
   /************  TIMER  ************/
 
   let timer;
 
+  function startCountDown() {
+    timer = setInterval(() => {
+      quiz.timeRemaining--;
+      let minutesNew = Math.floor(quiz.timeRemaining / 60).toString().padStart(2, "0");
+      let secondsNew = (quiz.timeRemaining % 60).toString().padStart(2, "0");
+      console.log("WTF")
+      timeRemainingContainer.innerText = `${minutesNew}:${secondsNew}`;
+      if (quiz.timeRemaining === 0) {
+        clearInterval(timer);
+        showResults();
+      }
+    }, 1000);
+  }
+
+  startCountDown();
+
+
+
 
   /************  EVENT LISTENERS  ************/
 
   nextButton.addEventListener("click", nextButtonHandler);
 
+  restartButton.addEventListener("click", restartButtonHandler)
+
 
 
   /************  FUNCTIONS  ************/
@@ -98,19 +120,20 @@ document.addEventListener("DOMContentLoaded", () => {
     //
     // 1. Show the question
     // Update the inner text of the question container element and show the question text
-
+    questionContainer.innerText = question.text;
 
     // 2. Update the green progress bar
     // Update the green progress bar (div#progressBar) width so that it shows the percentage of questions answered
 
-    progressBar.style.width = `65%`; // This value is hardcoded as a placeholder
+
 
+    progressBar.style.width = `${(quiz.currentQuestionIndex/quiz.questions.length)*100}%`; // This value is hardcoded as a placeholder
 
 
     // 3. Update the question count text 
     // Update the question count (div#questionCount) show the current question out of total questions
 
-    questionCount.innerText = `Question 1 of 10`; //  This value is hardcoded as a placeholder
+    questionCount.innerText = `Question ${quiz.currentQuestionIndex} of ${quiz.questions.length}`; //  This value is hardcoded as a placeholder
 
 
 
@@ -127,32 +150,57 @@ document.addEventListener("DOMContentLoaded", () => {
       // Hint 2: You can use the `element.type`, `element.name`, and `element.value` properties to set the type, name, and value of an element.
       // Hint 3: You can use the `element.appendChild()` method to append an element to the choices container.
       // Hint 4: You can use the `element.innerText` property to set the inner text of an element.
+    question.choices.forEach((choice) => {
 
-  }
+      const newInput = document.createElement("input");
+      const newLabel = document.createElement("label");
+      const newBr = document.createElement("br")
+
+      newInput.type = "radio";
+      newInput.name = "answer";
+      newInput.value = choice;
+
+      newLabel.innerText = choice;
 
+      choiceContainer.appendChild(newInput);
+      choiceContainer.appendChild(newLabel);
+      choiceContainer.appendChild(newBr)
 
+    });
+  }
 
-  function nextButtonHandler () {
-    let selectedAnswer; // A variable to store the selected answer value
-
-
-
-    // YOUR CODE HERE:
-    //
-    // 1. Get all the choice elements. You can use the `document.querySelectorAll()` method.
-
+  function nextButtonHandler() {
+    let selectedAnswer;
+
+    const choices = document.querySelectorAll("input[name='answer']");
+    choices.forEach((choice) => {
+      if (choice.checked) {
+        selectedAnswer = choice.value;
+      }
+    });
+
+    if (selectedAnswer) {
+      const currentQuestion = quiz.getQuestion();
+      if (selectedAnswer === currentQuestion.answer) {
+        quiz.checkAnswer(true); 
+      }
+
+      quiz.moveToNextQuestion();
+      showQuestion();
+    }
+  }
 
-    // 2. Loop through all the choice elements and check which one is selected
-      // Hint: Radio input elements have a property `.checked` (e.g., `element.checked`).
-      //  When a radio input gets selected the `.checked` property will be set to true.
-      //  You can use check which choice was selected by checking if the `.checked` property is true.
+  function restartButtonHandler() {
+    quiz.timeRemaining = quizDuration;
+    quiz.currentQuestionIndex = 0;
+    quiz.correctAnswers = 0;
+    quiz.shuffleQuestions();
+    showQuestion();
+    startCountDown();
+    quizView.style.display = "block";
+    endView.style.display = "none";
 
-
-    // 3. If an answer is selected (`selectedAnswer`), check if it is correct and move to the next question
-      // Check if selected answer is correct by calling the quiz method `checkAnswer()` with the selected answer.
-      // Move to the next question by calling the quiz method `moveToNextQuestion()`.
-      // Show the next question by calling the function `showQuestion()`.
-  }  
+  }
 
 
 
@@ -162,13 +210,14 @@ document.addEventListener("DOMContentLoaded", () => {
     // YOUR CODE HERE:
     //
     // 1. Hide the quiz view (div#quizView)
+    clearInterval(timer);
     quizView.style.display = "none";
 
     // 2. Show the end view (div#endView)
     endView.style.display = "flex";
 
     // 3. Update the result container (div#result) inner text to show the number of correct answers out of total questions
-    resultContainer.innerText = `You scored 1 out of 1 correct answers!`; // This value is hardcoded as a placeholder
+    resultContainer.innerText = `You scored ${quiz.correctAnswers} out of ${quiz.questions.length} correct answers!`; // This value is hardcoded as a placeholder
   }
 
 });

src/question.js

@@ -1,7 +1,16 @@
 class Question {
-    // YOUR CODE HERE:
-    //
-    // 1. constructor (text, choices, answer, difficulty)
 
-    // 2. shuffleChoices()
+    constructor(text, choice, answer, difficulty){
+        this.text = text;
+        this.choices = choice;
+        this.answer = answer;
+        this.difficulty = difficulty;
+    }
+
+    shuffleChoices() {
+        for (let i = this.choices.length - 1; i > 0; i--) {
+            const j = Math.floor(Math.random() * (i + 1)); // Pick a random index from 0 to i
+            [this.choices[i], this.choices[j]] = [this.choices[j], this.choices[i]]; // Swap
+        }
+    }
 }

src/quiz.js

@@ -1,15 +1,58 @@
 class Quiz {
-    // YOUR CODE HERE:
-    //
-    // 1. constructor (questions, timeLimit, timeRemaining)
-
-    // 2. getQuestion()
 
-    // 3. moveToNextQuestion()
+    constructor(questions, timeLimit, timeRemaining){
+        this.questions = questions;
+        this.timeLimit = timeLimit;
+        this.timeRemaining = timeRemaining;
+        this.correctAnswers = 0;
+        this.currentQuestionIndex = 0;
+
+    }
+
+    getQuestion() {
+        return this.questions[this.currentQuestionIndex];
+    }
+
+    moveToNextQuestion(){
+        return this.currentQuestionIndex++;
+    }
+
+    shuffleQuestions() {
+        for (let i = this.questions.length - 1; i > 0; i--) {
+            const j = Math.floor(Math.random() * (i + 1)); // Pick a random index from 0 to i
+            [this.questions[i], this.questions[j]] = [this.questions[j], this.questions[i]]; // Swap
+        }
+    }
+
+    checkAnswer(answer){
+        if (answer){
+            return this.correctAnswers++;
+        }
+    }
+
+    hasEnded(){
+        if (this.currentQuestionIndex < this.questions.length){
+            return false;
+        }else{
+            return true;
+        }
+    }
 
-    // 4. shuffleQuestions()
+    filterQuestionsByDifficulty(difficulty) {
+        if (typeof difficulty !== "number" || difficulty < 1 || difficulty > 3){
+            return;
+        }
+
+        this.questions = this.questions.filter((question) => {
+            return question.difficulty === difficulty;
+        })
+    }
 
-    // 5. checkAnswer(answer)
+    averageDifficulty() {
+        const total = this.questions.reduce((sum, question) => {
+            return sum + question.difficulty;
+        }, 0)
 
-    // 6. hasEnded()
+        return total/(this.questions.length);
+    }
 }