#189 - Webflow CMS Interactive Quiz v0.1

<!-- 💙 MEMBERSCRIPT #189 v0.1 💙 - WEBFLOW CMS INTERACTIVE QUIZ  -->

<script>

(function() {

  'use strict';

  const CSS = {
    selectedBorder: '#3b82f6', correctBorder: '#10b981', correctBg: '#d1fae5',
    incorrectBorder: '#ef4444', incorrectBg: '#fee2e2', feedbackDelay: 1500,
    progressColor: '#3b82f6', msgColors: { info: '#3b82f6', success: '#10b981', warning: '#f59e0b', error: '#ef4444' }
  };

  let quizContainer, questions, currentQ = 0, answers = {}, score = 0, member = null, quizId = null;

  const wait = ms => new Promise(r => setTimeout(r, ms));

  const waitForWebflow = () => new Promise(r => {
    if (document.querySelectorAll('[data-ms-code="quiz-question"]').length > 0) return setTimeout(r, 100);
    if (window.Webflow?.require) window.Webflow.require('ix2').then(() => setTimeout(r, 100));
    else {
      const i = setInterval(() => {
        if (document.querySelectorAll('[data-ms-code="quiz-question"]').length > 0) {
          clearInterval(i); setTimeout(r, 100);
        }
      }, 100);
      setTimeout(() => { clearInterval(i); r(); }, 3000);
    }
  });

  const getAnswers = q => {
    let opts = q.querySelectorAll('[data-ms-code="answer-option"]');
    if (!opts.length) {
      const item = q.closest('[data-ms-code="quiz-item"]') || q.closest('.w-dyn-item');
      if (item) opts = item.querySelectorAll('[data-ms-code="answer-option"]');
    }
    return opts;
  };

  const getCorrectAnswer = q => {
    let ref = q.querySelector('[data-ms-code="correct-answer"]');
    if (!ref) {
      const item = q.closest('[data-ms-code="quiz-item"]') || q.closest('.w-dyn-item');
      if (item) ref = item.querySelector('[data-ms-code="correct-answer"]');
    }
    return ref;
  };

  const getNextButton = q => {
    let btn = q.querySelector('[data-ms-code="quiz-next"]');
    if (!btn) {
      const item = q.closest('[data-ms-code="quiz-item"]') || q.closest('.w-dyn-item');
      if (item) btn = item.querySelector('[data-ms-code="quiz-next"]');
    }
    return btn;
  };

  const setButtonState = (btn, enabled) => {
    if (!btn) return;
    if (btn.tagName === 'A') {
      btn.style.pointerEvents = enabled ? 'auto' : 'none';
      btn.style.opacity = enabled ? '1' : '0.5';
    } else btn.disabled = !enabled;
    btn.setAttribute('data-ms-disabled', enabled ? 'false' : 'true');
  };

  const clearStyles = opts => opts.forEach(opt => {
    opt.removeAttribute('data-ms-state');
    opt.style.borderWidth = opt.style.borderStyle = opt.style.borderColor = opt.style.backgroundColor = '';
  });

  const applyFeedback = (opt, isCorrect) => {
    opt.style.borderWidth = '2px';
    opt.style.borderStyle = 'solid';
    if (isCorrect) {
      opt.style.borderColor = CSS.correctBorder;
      opt.style.backgroundColor = CSS.correctBg;
      opt.setAttribute('data-ms-state', 'correct');
    } else {
      opt.style.borderColor = CSS.incorrectBorder;
      opt.style.backgroundColor = CSS.incorrectBg;
      opt.setAttribute('data-ms-state', 'incorrect');
    }
  };

  const randomizeAnswers = q => {
    const item = q.closest('[data-ms-code="quiz-item"]') || q.closest('.w-dyn-item');
    const container = item ? item.querySelector('[data-ms-code="quiz-answers"]') : q.querySelector('[data-ms-code="quiz-answers"]');
    if (!container) return;
    const opts = Array.from(getAnswers(q));
    if (opts.length <= 1) return;
    for (let i = opts.length - 1; i > 0; i--) {
      const j = Math.floor(Math.random() * (i + 1));
      [opts[i], opts[j]] = [opts[j], opts[i]];
    }
    opts.forEach(opt => container.appendChild(opt));
  };

  const getJSON = async () => {
    try {
      const ms = window.$memberstackDom;
      if (!ms) return {};
      const json = await ms.getMemberJSON();
      return json?.data || json || {};
    } catch (e) {
      return {};
    }
  };

  const generateQuizId = qs => {
    if (!qs || !qs.length) return `quiz-${Date.now()}`;
    const text = qs[0].querySelector('[data-ms-code="question-text"]')?.textContent || '';
    const hash = text.split('').reduce((a, c) => ((a << 5) - a) + c.charCodeAt(0), 0);
    return `quiz-${qs.length}-${Math.abs(hash)}`;
  };

  const loadSavedAnswers = async qId => {
    try {
      if (!window.$memberstackDom || !member) return null;
      const data = await getJSON();
      return data.quizData?.[qId]?.questions || null;
    } catch (e) {
      return null;
    }
  };

  const restoreAnswers = saved => {
    if (!saved) return;
    questions.forEach((q, qi) => {
      const qId = q.getAttribute('data-question-id') || `q-${qi}`;
      const ans = saved[qId];
      if (ans?.answer) {
        const opts = getAnswers(q);
        opts.forEach(opt => {
          if ((opt.textContent || '').trim() === ans.answer.trim()) {
            opt.setAttribute('data-ms-state', 'selected');
            opt.style.borderWidth = '2px';
            opt.style.borderStyle = 'solid';
            opt.style.borderColor = CSS.selectedBorder;
            answers[qId] = { answer: ans.answer.trim(), correct: ans.correct, element: opt };
            if (qi === currentQ) setButtonState(getNextButton(q), true);
          }
        });
      }
    });
  };

  const saveQuestionAnswer = async (qId, questionId, answer, isCorrect) => {
    try {
      const ms = window.$memberstackDom;
      if (!ms || !member) return;
      const data = await getJSON();
      if (!data.quizData) data.quizData = {};
      if (!data.quizData[qId]) data.quizData[qId] = { questions: {}, completed: false };
      data.quizData[qId].questions[questionId] = { answer, correct: isCorrect, answeredAt: new Date().toISOString() };
      await ms.updateMemberJSON({ json: data });
    } catch (e) {}
  };

  const showMsg = (msg, type = 'info') => {
    const el = document.createElement('div');
    el.setAttribute('data-ms-code', 'quiz-message');
    el.textContent = msg;
    el.style.cssText = `position:fixed;top:20px;right:20px;padding:12px 20px;border-radius:8px;color:white;z-index:10000;font-size:14px;font-weight:500;max-width:300px;box-shadow:0 4px 12px rgba(0,0,0,0.15);background:${CSS.msgColors[type] || CSS.msgColors.info};`;
    document.body.appendChild(el);
    setTimeout(() => el.remove(), 3000);
  };

  const updateProgress = (curr, total) => {
    const bar = quizContainer.querySelector('[data-ms-code="quiz-progress"]');
    const text = quizContainer.querySelector('[data-ms-code="quiz-progress-text"]');
    if (bar) {
      bar.style.width = (curr / total * 100) + '%';
      bar.style.backgroundColor = CSS.progressColor;
    }
    if (text) text.textContent = `Question ${curr} of ${total}`;
  };

  const restartQuiz = () => {
    currentQ = 0; score = 0; answers = {};
    const results = quizContainer.querySelector('[data-ms-code="quiz-results"]');
    if (results) results.style.display = 'none';
    questions.forEach((q, i) => {
      const visible = i === 0;
      const item = q.closest('[data-ms-code="quiz-item"]') || q.closest('.w-dyn-item');
      if (item) {
        item.style.display = visible ? 'block' : 'none';
        item.setAttribute('data-ms-display', visible ? 'visible' : 'hidden');
      }
      q.style.display = visible ? 'block' : 'none';
      q.setAttribute('data-ms-display', visible ? 'visible' : 'hidden');
      clearStyles(getAnswers(q));
      if (i === 0) setButtonState(getNextButton(q), false);
    });
    if (window.$memberstackDom && member && quizId) {
      loadSavedAnswers(quizId).then(saved => { if (saved) restoreAnswers(saved); });
    }
    updateProgress(1, questions.length);
    quizContainer.scrollIntoView({ behavior: 'smooth', block: 'start' });
    showMsg('Quiz restarted!', 'info');
  };

  document.addEventListener("DOMContentLoaded", async function() {
    try {
      await waitForWebflow();
      if (window.$memberstackDom) {
        const ms = window.$memberstackDom;
        await (ms.onReady || Promise.resolve());
        const data = await ms.getCurrentMember();
        member = data?.data || data;
      }
      await init();
    } catch (e) {
      console.error('MemberScript #189: Error:', e);
    }
  });

  async function init() {
    quizContainer = document.querySelector('[data-ms-code="quiz-container"]');
    if (!quizContainer) return console.warn('MemberScript #189: Quiz container not found.');
    questions = Array.from(quizContainer.querySelectorAll('[data-ms-code="quiz-question"]'));
    if (!questions.length) return console.warn('MemberScript #189: No questions found.');
    quizId = quizContainer.getAttribute('data-quiz-id') || generateQuizId(questions);
    let savedAnswers = null;
    if (window.$memberstackDom && member) savedAnswers = await loadSavedAnswers(quizId);
    const noRandom = quizContainer.getAttribute('data-randomize-answers') === 'false';
    questions.forEach((q, i) => {
      const visible = i === 0;
      const item = q.closest('[data-ms-code="quiz-item"]') || q.closest('.w-dyn-item');
      if (item) {
        item.style.display = visible ? 'block' : 'none';
        item.setAttribute('data-ms-display', visible ? 'visible' : 'hidden');
      }
      q.style.display = visible ? 'block' : 'none';
      q.setAttribute('data-ms-display', visible ? 'visible' : 'hidden');
      if (!noRandom) randomizeAnswers(q);
      const correctRef = getCorrectAnswer(q);
      if (correctRef) {
        correctRef.style.display = 'none';
        correctRef.style.visibility = 'hidden';
        const opts = getAnswers(q);
        if (opts.length) {
          const correctText = (correctRef.textContent || '').replace(/\s+/g, ' ').trim();
          opts.forEach(opt => {
            if ((opt.textContent || '').replace(/\s+/g, ' ').trim() === correctText) {
              opt.setAttribute('data-is-correct', 'true');
            }
          });
        }
      }
    });
    const results = quizContainer.querySelector('[data-ms-code="quiz-results"]');
    if (results) results.style.display = 'none';
    currentQ = 0; score = 0; answers = {};
    if (savedAnswers) restoreAnswers(savedAnswers);
    questions.forEach((q, qi) => {
      getAnswers(q).forEach(opt => {
        opt.addEventListener('click', function(e) {
          if (this.tagName === 'A') { e.preventDefault(); e.stopPropagation(); }
          clearStyles(getAnswers(q));
          this.setAttribute('data-ms-state', 'selected');
          this.style.borderWidth = '2px';
          this.style.borderStyle = 'solid';
          this.style.borderColor = CSS.selectedBorder;
          const qId = q.getAttribute('data-question-id') || `q-${qi}`;
          const answerText = this.textContent.trim();
          const isCorrect = this.getAttribute('data-is-correct') === 'true';
          answers[qId] = { answer: answerText, correct: isCorrect, element: this };
          if (quizId && window.$memberstackDom && member) saveQuestionAnswer(quizId, qId, answerText, isCorrect);
          setButtonState(getNextButton(q), true);
        });
      });
    });
    quizContainer.querySelectorAll('[data-ms-code="quiz-next"], [data-ms-code="quiz-submit"]').forEach(btn => {
      btn.addEventListener('click', function(e) {
        if (this.tagName === 'A') { e.preventDefault(); e.stopPropagation(); }
        const q = questions[currentQ];
        const qId = q.getAttribute('data-question-id') || `q-${currentQ}`;
        if (!answers[qId]) {
          showMsg('Please select an answer before continuing.', 'warning');
          return;
        }
        showFeedback(q, answers[qId]);
        setTimeout(() => moveNext(), CSS.feedbackDelay);
      });
    });
    document.querySelectorAll('[data-ms-code="restart-quiz"]').forEach(btn => {
      btn.addEventListener('click', function(e) {
        if (this.tagName === 'A') { e.preventDefault(); e.stopPropagation(); }
        restartQuiz();
      });
    });
    function showFeedback(q, data) {
      const opts = getAnswers(q);
      clearStyles(opts);
      const selected = data.element || Array.from(opts).find(o => o.textContent.trim() === data.answer);
      if (selected) {
        applyFeedback(selected, data.correct);
        if (!data.correct) {
          opts.forEach(opt => {
            if (opt.getAttribute('data-is-correct') === 'true') {
              applyFeedback(opt, true);
              opt.setAttribute('data-ms-state', 'highlight');
            }
          });
        }
      }
    }
    function moveNext() {
      const q = questions[currentQ];
      const item = q.closest('[data-ms-code="quiz-item"]') || q.closest('.w-dyn-item');
      if (item) {
        item.style.display = 'none';
        item.setAttribute('data-ms-display', 'hidden');
      }
      q.style.display = 'none';
      q.setAttribute('data-ms-display', 'hidden');
      if (currentQ < questions.length - 1) {
        currentQ++;
        const nextQ = questions[currentQ];
        const nextItem = nextQ.closest('[data-ms-code="quiz-item"]') || nextQ.closest('.w-dyn-item');
        if (nextItem) {
          nextItem.style.display = 'block';
          nextItem.setAttribute('data-ms-display', 'visible');
        }
        nextQ.style.display = 'block';
        nextQ.setAttribute('data-ms-display', 'visible');
        setButtonState(getNextButton(nextQ), false);
        clearStyles(getAnswers(nextQ));
        updateProgress(currentQ + 1, questions.length);
        nextQ.scrollIntoView({ behavior: 'smooth', block: 'start' });
      } else finish();
    }
    function finish() {
      score = Object.values(answers).filter(a => a.correct).length;
      const total = questions.length;
      const pct = Math.round((score / total) * 100);
      questions.forEach(q => {
        const item = q.closest('[data-ms-code="quiz-item"]') || q.closest('.w-dyn-item');
        if (item) item.style.display = 'none';
        q.style.display = 'none';
      });
      const results = quizContainer.querySelector('[data-ms-code="quiz-results"]');
      if (!results) return console.warn('MemberScript #189: Results container not found.');
      const s = results.querySelector('[data-ms-code="quiz-score"]');
      const t = results.querySelector('[data-ms-code="quiz-total"]');
      const p = results.querySelector('[data-ms-code="quiz-percentage"]');
      if (s) s.textContent = score;
      if (t) t.textContent = total;
      if (p) p.textContent = pct + '%';
      results.style.display = 'flex';
      results.scrollIntoView({ behavior: 'smooth', block: 'start' });
      if (window.$memberstackDom) saveScore(score, total, pct);
    }
    async function saveScore(score, total, pct) {
      try {
        const ms = window.$memberstackDom;
        if (!ms) return;
        const currentMember = await ms.getCurrentMember();
        if (!currentMember || !currentMember.data) return;
        const existingData = await getJSON();
        const existingScores = Array.isArray(existingData.quizScores) ? existingData.quizScores : [];
        if (!existingData.quizData) existingData.quizData = {};
        if (!existingData.quizData[quizId]) existingData.quizData[quizId] = { questions: {}, completed: false };
        existingData.quizData[quizId].completed = true;
        existingData.quizData[quizId].score = score;
        existingData.quizData[quizId].total = total;
        existingData.quizData[quizId].percentage = pct;
        existingData.quizData[quizId].completedAt = new Date().toISOString();
        const updatedData = {
          ...existingData,
          quizScores: [...existingScores, { score, total, percentage: pct, completedAt: new Date().toISOString() }],
          lastQuizScore: score, lastQuizTotal: total, lastQuizPercentage: pct
        };
        await ms.updateMemberJSON({ json: updatedData });
        showMsg('Score saved to your profile!', 'success');
      } catch (e) {
        console.error('MemberScript #189: Error saving score:', e);
        showMsg('Error saving score. Please try again.', 'error');
      }
    }
    updateProgress(1, questions.length);
  }

})();

</script>