PT_RMT_262025 Tanja Mueller

index.html

@@ -39,8 +39,8 @@ <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> -->
-      </div>
+        <button id="restartButton" class="button-secondary">Restart Quiz</button>
+      </div> 
     </div>
 
 

src/index.js

@@ -61,12 +61,36 @@ document.addEventListener("DOMContentLoaded", () => {
 
   let timer;
 
+  function startTimer() {
+
+    // Clear any existing timers from previous runs
+    clearInterval(timer);
+
+    // start countdown
+    timer = setInterval(() => {
+      quiz.timeRemaining--;
+
+    //convert time within function scope
+    const minutes = Math.floor(quiz.timeRemaining / 60).toString().padStart(2, "0");
+    const seconds = (quiz.timeRemaining % 60).toString().padStart(2, "0");  
+
+    // kep display updated
+      timeRemainingContainer.innerText = `${minutes}:${seconds}`;
+
+    // when time has run out: show results
+      if (quiz.timeRemaining <= 0) {
+        clearInterval(timer);
+        showResults();
+      }
+   }, 1000);
+}
+
 
   /************  EVENT LISTENERS  ************/
 
   nextButton.addEventListener("click", nextButtonHandler);
 
-
+  startTimer();
 
   /************  FUNCTIONS  ************/
 
@@ -89,6 +113,7 @@ document.addEventListener("DOMContentLoaded", () => {
 
     // Get the current question from the quiz by calling the Quiz class method `getQuestion()`
     const question = quiz.getQuestion();
+    console.log(question);
     // Shuffle the choices of the current question by calling the method 'shuffleChoices()' on the question object
     question.shuffleChoices();
 
@@ -98,27 +123,50 @@ 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 = `65%`; */ // This value is hardcoded as a placeholder
+
+      const currentIndex = quiz.currentQuestionIndex + 1;
+
+      const progressPercent = (currentIndex / quiz.questions.length) * 100;
+
+       progressBar.style.width = `${progressPercent}%`;
 
 
 
     // 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 ${currentIndex} of ${quiz.questions.length}`;
 
 
 
     // 4. Create and display new radio input element with a label for each choice.
     // Loop through the current question `choices`.
       // For each choice create a new radio input with a label, and append it to the choice container.
       // Each choice should be displayed as a radio input element with a label:
-      /* 
+      question.choices.forEach((choiceText, index) => {
+
+        const input = document.createElement('input');
+        const label = document.createElement('label');
+
+        input.type = 'radio';
+        input.name = 'answer';
+        input.value = choiceText;
+        input.id = `choices-${index}`
+
+        label.htmlFor = input.id;
+        label.innerText = choiceText;
+        choiceContainer.appendChild(input);
+        choiceContainer.appendChild(label);
+        choiceContainer.appendChild(document.createElement('br'));
+
+      });
+      /*
           <input type="radio" name="choice" value="CHOICE TEXT HERE">
           <label>CHOICE TEXT HERE</label>
         <br>
@@ -133,28 +181,39 @@ document.addEventListener("DOMContentLoaded", () => {
 
 
   function nextButtonHandler () {
-    let selectedAnswer; // A variable to store the selected answer value
-
-
+    let selectedAnswer = null; // A variable to store the selected answer value
 
     // YOUR CODE HERE:
     //
     // 1. Get all the choice elements. You can use the `document.querySelectorAll()` method.
-
+    const choices = document.querySelectorAll('input[name="answer"]');
 
     // 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.
-
+      choices.forEach((choice) => {
+        if (choice.checked) {
+          selectedAnswer = choice.value;
+        }
+      });
 
     // 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()`.
-  }  
-
+        if (selectedAnswer !== null) {
+          quiz.checkAnswer(selectedAnswer);
+          quiz.moveToNextQuestion();
 
+          if (quiz.hasEnded()) {
+            showResults();
+          } else {
+            showQuestion();
+          } 
+        }
+  } 
+
 
 
   function showResults() {
@@ -165,10 +224,31 @@ document.addEventListener("DOMContentLoaded", () => {
     quizView.style.display = "none";
 
     // 2. Show the end view (div#endView)
-    endView.style.display = "flex";
+    endView.style.display = "block";
 
     // 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 1 out of 1 correct answers!`; */ // This value is hardcoded as a placeholder
+    resultContainer.innerText = `Your final score is: ${quiz.correctAnswers} out of ${quiz.questions.length}`;
+    const restartBtn = document.getElementById("restartButton");
+
+    if (restartBtn) {
+      restartBtn.addEventListener("click", restartQuiz);
+    }
+  }
+
+  function restartQuiz() {
+
+    endView.style.display = "none";
+    quizView.style.display = "block";
+    quiz.currentQuestionIndex = 0;
+    quiz.correctAnswers = 0;
+    quiz.timeRemaining = quizDuration;
+    quiz.shuffleQuestions();
+
+    clearInterval(timer);
+    startTimer();
+    showQuestion();
+
   }
 
 });

src/question.js

@@ -2,6 +2,38 @@ class Question {
     // YOUR CODE HERE:
     //
     // 1. constructor (text, choices, answer, difficulty)
+    constructor(text, choices, answer, difficulty) {
+
+        this.text = text;
+        this.choices = choices;
+        this.answer = answer;
+        this.difficulty = difficulty;
+    }
 
     // 2. shuffleChoices()
-}
+
+    shuffleChoices() {
+
+        let currentIndex = this.choices.length - 1;
+
+    while (currentIndex > 0) {
+        let randomIndex = Math.floor(Math.random() * (currentIndex + 1));
+
+        [this.choices[currentIndex], this.choices[randomIndex]] = 
+        [this.choices[randomIndex], this.choices[currentIndex]];
+
+         currentIndex--;
+
+    }
+    /* return this.choices; */
+    }
+
+}
+
+
+this.questions = [
+    new Question("What is 2 + 2?", ["3", "4", "5", "6"], "4", 1),
+    new Question("What is the capital of France?", ["Miami", "Paris", "Oslo", "Rome"], "Paris", 1),
+    new Question("Who created JavaScript?", ["Plato", "Brendan Eich", "Lea Verou", "Bill Gates"], "Brendan Eich", 2),
+    new Question("What is the mass–energy equivalence equation?", ["E = mc^2", "E = m*c^2", "E = m*c^3", "E = m*c"], "E = mc^2", 3),
+    ];

src/quiz.js

@@ -1,15 +1,103 @@
 class Quiz {
     // YOUR CODE HERE:
-    //
+    constructor(questions,timeLimit,timeRemaining) {
+
+    this.questions = [
+    new Question("What is 2 + 2?", ["3", "4", "5", "6"], "4", 1),
+    new Question("What is the capital of France?", ["Miami", "Paris", "Oslo", "Rome"], "Paris", 1),
+    new Question("Who created JavaScript?", ["Plato", "Brendan Eich", "Lea Verou", "Bill Gates"], "Brendan Eich", 2),
+    new Question("What is the mass–energy equivalence equation?", ["E = mc^2", "E = m*c^2", "E = m*c^3", "E = m*c"], "E = mc^2", 3),
+    ];
     // 1. constructor (questions, timeLimit, timeRemaining)
 
+        this.questions = questions;
+        this.timeLimit = timeLimit;
+        this.timeRemaining = timeRemaining;
+        this.correctAnswers = 0;
+        this.currentQuestionIndex = 0;
+
+    }
+
     // 2. getQuestion()
+     getQuestion() {
+
+       return this.questions[this.currentQuestionIndex];
+
+    }
 
     // 3. moveToNextQuestion()
+
+      moveToNextQuestion() {
+
+        this.currentQuestionIndex++;
+      }
+
+     /* if (this.currentQuestionIndex < this.questions.length - 1) {
+          this.currentQuestionIndex++;
+          return this.currentQuestionIndex;
+
+        } else {
+          return "you\'re done";
+        } */
 
     // 4. shuffleQuestions()
+    shuffleQuestions() {
+         let currentIndex = this.questions.length - 1;
+
+    while (currentIndex > 0) {
+        let randomIndex = Math.floor(Math.random() * (currentIndex + 1));
+
+        [this.questions[currentIndex], this.questions[randomIndex]] = 
+        [this.questions[randomIndex], this.questions[currentIndex]];
+
+         currentIndex--; 
+    }
+    /* return this.questions; */
+    }
+
+
 
     // 5. checkAnswer(answer)
+    checkAnswer(answer) {
+      if (answer === this.getQuestion().answer) {
+        this.correctAnswers++;
+      }
+
+    }
 
     // 6. hasEnded()
+    hasEnded() {
+
+      return this.currentQuestionIndex >= this.questions.length;
+    }
+     /*  if (this.currentQuestionIndex < this.questions.length) {
+        return false;
+      }
+      else if (this.currentQuestionIndex == this.questions.length) {
+        return true;
+      }
+      } */
+
+
+    // 7. filterQuestionsByDifficulty(difficulty)
+
+    filterQuestionsByDifficulty(difficulty) {
+      if (typeof difficulty === 'number' && difficulty >= 1 && difficulty <= 3) {
+        this.questions = this.questions.filter(question => question.difficulty === difficulty);
+    }
+  }
+
+
+  // averageDifficulty()
+
+   averageDifficulty() {
+
+     if (this.questions.length === 0) return 0;
+
+    const total = this.questions.reduce((acc, q) => {
+      return acc + q.difficulty;
+    }, 0);
+    return  total / this.questions.length;
+   }
+
 }