Finished

src/index.js

@@ -3,172 +3,161 @@ document.addEventListener("DOMContentLoaded", () => {
   // View divs
   const quizView = document.querySelector("#quizView");
   const endView = document.querySelector("#endView");
-
   // Quiz view elements
   const progressBar = document.querySelector("#progressBar");
   const questionCount = document.querySelector("#questionCount");
   const questionContainer = document.querySelector("#question");
   const choiceContainer = document.querySelector("#choices");
   const nextButton = document.querySelector("#nextButton");
-
+  const choicesElements = document.getElementsByName("choice");
+  const timeRemainingContainer = document.getElementById("timeRemaining");
   // End view elements
   const resultContainer = document.querySelector("#result");
-
-
   /************  SET VISIBILITY OF VIEWS  ************/
-
   // Show the quiz view (div#quizView) and hide the end view (div#endView)
   quizView.style.display = "block";
   endView.style.display = "none";
-
-
   /************  QUIZ DATA  ************/
-
   // Array with the quiz questions
   const 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),
+    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
+    ),
     // Add more questions here
   ];
   const quizDuration = 120; // 120 seconds (2 minutes)
-
-
   /************  QUIZ INSTANCE  ************/
-
   // Create a new Quiz instance object
   const quiz = new Quiz(questions, quizDuration, quizDuration);
   // Shuffle the quiz questions
   quiz.shuffleQuestions();
-
-
   /************  SHOW INITIAL CONTENT  ************/
-
   // Convert the time remaining in seconds to minutes and seconds, and pad the numbers with zeros if needed
-  const minutes = Math.floor(quiz.timeRemaining / 60).toString().padStart(2, "0");
+  const minutes = Math.floor(quiz.timeRemaining / 60)
+    .toString()
+    .padStart(2, "0");
   const seconds = (quiz.timeRemaining % 60).toString().padStart(2, "0");
-
   // Display the time remaining in the time remaining container
-  const timeRemainingContainer = document.getElementById("timeRemaining");
   timeRemainingContainer.innerText = `${minutes}:${seconds}`;
-
   // Show first question
   showQuestion();
-
-
   /************  TIMER  ************/
-
   let timer;
-
-
   /************  EVENT LISTENERS  ************/
-
   nextButton.addEventListener("click", nextButtonHandler);
-
-
-
   /************  FUNCTIONS  ************/
-
-  // showQuestion() - Displays the current question and its choices
+  showQuestion(); //Displays the current question and its choices
   // nextButtonHandler() - Handles the click on the next button
   // showResults() - Displays the end view and the quiz results
-
-
-
   function showQuestion() {
     // If the quiz has ended, show the results
     if (quiz.hasEnded()) {
       showResults();
       return;
     }
-
     // Clear the previous question text and question choices
     questionContainer.innerText = "";
     choiceContainer.innerHTML = "";
-
     // Get the current question from the quiz by calling the Quiz class method `getQuestion()`
     const question = quiz.getQuestion();
     // Shuffle the choices of the current question by calling the method 'shuffleChoices()' on the question object
     question.shuffleChoices();
-
-
-
     // YOUR CODE HERE:
-    //
     // 1. Show the question
-    // Update the inner text of the question container element and show the question text
-
-
+    // Update the inner text of the question contaier element and show the question text
+    questionContainer.textContent = 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
-
-
-
-    // 3. Update the question count text 
+    //const progress = (quiz.currentQuestionIndex / quiz.questions.length) * 100;
+    //progressBar.style.width = `${progress}%`; // This value is hardcoded as a placeholder
+    const progressPercentage =
+      ((quiz.questionIndex + 1) / quiz.questions.length) * 100;
+    progressBar.style.width = `${progressPercentage}%`;
+    // 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
-
-
-
+    const current = quiz.currentQuestionIndex + 1;
+    const total = quiz.questions.length;
+    questionCount.innerText = `Question ${current} of ${total}`; //  This value is hardcoded as a placeholder
     // 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:
-      /* 
+    // 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:
+    /*
           <input type="radio" name="choice" value="CHOICE TEXT HERE">
           <label>CHOICE TEXT HERE</label>
         <br>
       */
-      // Hint 1: You can use the `document.createElement()` method to create a new element.
-      // 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 choiceInput = document.createElement("input");
+      choiceInput.type = "radio";
+      choiceInput.name = "choice";
+      choiceInput.value = choice;
+      choiceContainer.appendChild(choiceInput);
+      const choiceLabel = document.createElement("label");
+      choiceLabel.innerText = choice;
+      choiceContainer.appendChild(choiceLabel);
+    });
   }
-
-
-
-  function nextButtonHandler () {
-    let selectedAnswer; // A variable to store the selected answer value
-
-
-
+  function nextButtonHandler() {
+    // A variable to store the selected answer value
     // YOUR CODE HERE:
-    //
-    // 1. Get all the choice elements. You can use the `document.querySelectorAll()` method.
-
-
-    // 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.
-
-
+    let selectedAnswer = "";
+    for (let i = 0; i < choicesElements.length; i++) {
+      if (choicesElements[i].checked) {
+        selectedAnswer = choicesElements[i].value;
+      }
+    }
+    if (selectedAnswer) {
+      quiz.checkAnswer(selectedAnswer);
+    }
+    quiz.currentQuestionIndex++;
+    showQuestion();
     // 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()`.
-  }  
-
-
-
-
+    // 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()`.
+  }
   function showResults() {
-
     // YOUR CODE HERE:
     //
     // 1. Hide the quiz view (div#quizView)
     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
   }
-
-});
+  //TIMER
+  function startTimer() {
+    console.log("quiz time remaining", quiz.timeRemaining);
+    timer = setInterval(() => {
+      quiz.timeRemaining--;
+      const minutes = Math.floor(quiz.timeRemaining / 60)
+        .toString()
+        .padStart(2, "0");
+      const seconds = (quiz.timeRemaining % 60).toString().padStart(2, "0");
+      timeRemainingContainer.innerText = `${minutes}:${seconds}`;
+      if (quiz.timeRemaining <= 0) {
+        clearInterval(timer);
+        showResults();
+      }
+    }, 1000);
+  }
+  startTimer();
+});

src/question.js

@@ -1,7 +1,19 @@
 class Question {
-    // YOUR CODE HERE:
-    //
-    // 1. constructor (text, choices, answer, difficulty)
+  constructor(text, choices, answer, difficulty) {
+    this.text = text; // data type strings
+    this.choices = choices; // data type array of strings
+    this.answer = answer; // data type strings
+    this.difficulty = difficulty; // data type number
+  }
+  shuffleChoices() {
+    for (let i = 0; i < this.choices.length; i++) {
+      let randomIndex = Math.floor(Math.random() * this.choices.length);
+      let choiceToMove = this.choices[i];
+      this.choices.splice(i, 1);
+      this.choices.splice(randomIndex, 0, choiceToMove);
 
-    // 2. shuffleChoices()
-}
+      //apply to the property choice using sort method and Math.random between -0 e 9.
+      //this.choices = this.choices.sort(() => Math.random() - 0.5);
+    }
+  }
+}

src/quiz.js

@@ -1,15 +1,52 @@
 class Quiz {
-    // YOUR CODE HERE:
-    //
-    // 1. constructor (questions, timeLimit, timeRemaining)
+  constructor(questions, timeLimit, timeRemaining) {
+    this.questions = questions; // 1º array of objects to store all questions
+    this.timeLimit = timeLimit; // 2º Number
+    this.timeRemaining = timeRemaining; // 3º Number
+    this.correctAnswers = 0;
+    this.currentQuestionIndex = 0;
+  }
 
-    // 2. getQuestion()
-
-    // 3. moveToNextQuestion()
+  getQuestion() {
+    return this.questions[this.currentQuestionIndex]; // Array index already initialized by 0
+  } 
 
-    // 4. shuffleQuestions()
+  moveToNextQuestion() {
+    this.currentQuestionIndex += 1;
+  }
 
-    // 5. checkAnswer(answer)
+  shuffleQuestions() {
+    this.questions = this.questions.sort(() => Math.random() - 0.9);
+  } 
 
-    // 6. hasEnded()
-}
+  checkAnswer(answer) {
+    const currentQuestion = this.getQuestion(); // Store answer input into a variable
+    if (answer === currentQuestion.answer) {
+      //compare answer input with correct answer from the question
+      this.correctAnswers += 1; // increase by 1 if correct answered.
+    }
+  }
+
+  hasEnded() {
+    return this.currentQuestionIndex === this.questions.length; // It is comparisson No need to return with if/else
+  }
+
+  filterQuestionsByDifficulty(difficulty) {
+    if (difficulty !== 1 && difficulty !== 2 && difficulty !== 3) {
+      return;
+    }
+    this.questions = this.questions.filter((oneQuestion) => {
+      if (oneQuestion.difficulty === difficulty) {
+        return true;
+      }
+    });
+  }
+
+  averageDifficulty() {
+    return (
+      this.questions.reduce((acc, currentQuestion) => {
+        return acc + currentQuestion.difficulty;
+      }, 0) / this.questions.length
+    );
+  }
+}