09同意前埋め込みプレースホルダー — 案内文の高さを計算して折りたたむカード

<main class="stage">
<section class="panel">
  <div class="card" id="card">
    <div class="notice" id="notice">
      <div class="noticeHead">
        <span class="statusDot" id="statusDot" aria-hidden="true"></span>
        <span class="noticeLead">この動画は外部サービスから読み込みます。</span>
      </div>
      <p class="noticeSub">同意するとこの場に読み込まれます。</p>
      <button type="button" class="consentBtn" id="consentBtn" aria-expanded="true">同意して読み込む</button>
    </div>
    <div class="frame" id="frame" aria-hidden="true">
      <canvas class="frameThumb" id="frameThumb" width="240" height="80"></canvas>
      <div class="frameScrim"></div>
      <div class="frameContent">
        <span class="framePlay" aria-hidden="true"></span>
        <span class="frameLabel">同意後に再生される動画</span>
      </div>
      <div class="progressTrack">
        <div class="progressBar" id="progressBar"></div>
      </div>
    </div>
  </div>
</section>
</main>

@use "../../../../site/static/demo-tokens" as *;

@include stage($stage-ink);

.panel {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.card {
  box-sizing: border-box;
  width: 240px;
  padding: $sp-4;
  border-radius: $r-card;
  background: $subject-cream;
  display: flex;
  flex-direction: column;
  gap: $sp-3;
}

.notice {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: $sp-2;
}

.noticeHead {
  display: flex;
  align-items: center;
  gap: $sp-2;
}

.statusDot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: $r-pill;
  background: $subject-mint;
  opacity: .86;
}

.noticeLead {
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  font-weight: 600;
  font-size: 13px;
  line-height: 1.4;
  color: $subject-ink;
}

.noticeSub {
  margin: 0;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  font-weight: 400;
  font-size: 12px;
  line-height: 1.4;
  color: $subject-ink;
  opacity: .78;
}

.consentBtn {
  align-self: flex-start;
  border: 0;
  padding: $sp-2 $sp-4;
  border-radius: $r-sm;
  background: $subject-blue-deep;
  color: $subject-cream;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  font-weight: 600;
  font-size: 13px;
  line-height: 1.3;
  cursor: pointer;
}

.frame {
  position: relative;
  height: 0;
  overflow: hidden;
  border-radius: $r-sm;
}

.frameThumb {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.frameScrim {
  position: absolute;
  inset: 0;
  background: rgba($stage-ink, .68);
}

.frameContent {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: $sp-2;
  color: $subject-cream;
}

.framePlay {
  width: 0;
  height: 0;
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
  border-left: 14px solid $subject-cream;
}

.frameLabel {
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  font-weight: 500;
  font-size: 12px;
  line-height: 1.3;
}

.progressTrack {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: rgba($subject-cream, .24);
}

.progressBar {
  height: 100%;
  width: 100%;
  transform-origin: left center; // 채움 막대가 시작 변에서 자라난다 (BD8 예외 대상)
  transform: scaleX(0);
  background: $subject-cream;
}

@media (max-width: 340px) {
  .card { width: 200px; padding: $sp-3; }
  .noticeLead { font-size: 12px; }
  .noticeSub { font-size: 11px; }
  .consentBtn { padding: $sp-1 $sp-3; font-size: 12px; }
  .frameLabel { font-size: 11px; }
}

@media (prefers-reduced-motion: reduce) {
  .statusDot { opacity: .86; }
}

html, body {
  margin: 0;
  overflow: hidden;
}

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #17141a;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.panel {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.card {
  box-sizing: border-box;
  width: 240px;
  padding: 16px;
  border-radius: 16px;
  background: #fff7e6;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.notice {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.noticeHead {
  display: flex;
  align-items: center;
  gap: 8px;
}

.statusDot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: #4cd4a6;
  opacity: 0.86;
}

.noticeLead {
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  font-weight: 600;
  font-size: 13px;
  line-height: 1.4;
  color: #17141a;
}

.noticeSub {
  margin: 0;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  font-weight: 400;
  font-size: 12px;
  line-height: 1.4;
  color: #17141a;
  opacity: 0.78;
}

.consentBtn {
  align-self: flex-start;
  border: 0;
  padding: 8px 16px;
  border-radius: 8px;
  background: #0a4fe8;
  color: #fff7e6;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  font-weight: 600;
  font-size: 13px;
  line-height: 1.3;
  cursor: pointer;
}

.frame {
  position: relative;
  height: 0;
  overflow: hidden;
  border-radius: 8px;
}

.frameThumb {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.frameScrim {
  position: absolute;
  inset: 0;
  background: rgba(23, 20, 26, 0.68);
}

.frameContent {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: #fff7e6;
}

.framePlay {
  width: 0;
  height: 0;
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
  border-left: 14px solid #fff7e6;
}

.frameLabel {
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  font-weight: 500;
  font-size: 12px;
  line-height: 1.3;
}

.progressTrack {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: rgba(255, 247, 230, 0.24);
}

.progressBar {
  height: 100%;
  width: 100%;
  transform-origin: left center;
  transform: scaleX(0);
  background: #fff7e6;
}

@media (max-width: 340px) {
  .card {
    width: 200px;
    padding: 12px;
  }
  .noticeLead {
    font-size: 12px;
  }
  .noticeSub {
    font-size: 11px;
  }
  .consentBtn {
    padding: 4px 12px;
    font-size: 12px;
  }
  .frameLabel {
    font-size: 11px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .statusDot {
    opacity: 0.86;
  }
}

// 동의 후 불러오는 임베드(09) — 안내 블록의 실측 높이를 접힘 진행도에 맞춰
// 그대로 프레임 높이로 넘긴다(계산 겹). 실키·실서버 요청 없음.
// 동의 버튼 클릭 시 즉시 전환(실사용자 리스너 있음).
(function () {
  var cardEl = document.getElementById('card');
  var noticeEl = document.getElementById('notice');
  var frameEl = document.getElementById('frame');
  var frameThumbEl = document.getElementById('frameThumb');
  var statusDotEl = document.getElementById('statusDot');
  var consentBtnEl = document.getElementById('consentBtn');
  var progressBarEl = document.getElementById('progressBar');
  if (!cardEl || !noticeEl || !frameEl || !frameThumbEl || !statusDotEl || !consentBtnEl || !progressBarEl) return;
  var reduce = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
  var NARROW = window.matchMedia('(max-width: 340px)').matches;

  var CYCLE_MS = 2000;
  var CONSENT_AT = 700;
  var CONSENT_FOLD_MS = 200;
  var FRAME_BASE_H = NARROW ? 56 : 96;
  var DOT_MS = 700;

  function mulberry32(seed) {
    var a = seed >>> 0;
    return function () {
      a |= 0; a = (a + 0x6D2B79F5) | 0;
      var t = Math.imul(a ^ (a >>> 15), 1 | a);
      t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t;
      return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
    };
  }

  function drawSeedThumb(canvas, seed) {
    var ctx = canvas.getContext('2d');
    if (!ctx) return;
    var rnd = mulberry32(seed);
    var w = canvas.width, h = canvas.height;
    var hues = [216, 32, 268, 168];
    ctx.fillStyle = 'hsl(' + hues[Math.floor(rnd() * hues.length)] + ', 38%, 22%)';
    ctx.fillRect(0, 0, w, h);
    for (var i = 0; i < 6; i++) {
      var cx = rnd() * w, cy = rnd() * h, r = (0.18 + rnd() * 0.3) * Math.min(w, h);
      ctx.fillStyle = 'hsla(' + hues[Math.floor(rnd() * hues.length)] + ', ' + (44 + rnd() * 22).toFixed(1) + '%, ' + (38 + rnd() * 26).toFixed(1) + '%, .5)';
      ctx.beginPath(); ctx.arc(cx, cy, r, 0, Math.PI * 2); ctx.fill();
    }
    ctx.fillStyle = 'rgba(255, 247, 230, .06)';
    for (var j = 0; j < h; j += 4) ctx.fillRect(0, j, w, 1);
  }

  function easeOutCubic(p) { return 1 - Math.pow(1 - p, 3); }

  drawSeedThumb(frameThumbEl, 109);

  var consented = false;
  var consentTime = null;
  var consentOverride = false;
  var noticeH = 0;
  var prevT = 0;

  function enterConsent(t) {
    consented = true;
    consentTime = t;
    consentOverride = false;
    noticeH = noticeEl.offsetHeight;
    consentBtnEl.setAttribute('aria-expanded', 'false');
  }

  consentBtnEl.addEventListener('click', function () {
    consentOverride = true;
  });

  function resetToIdle() {
    consented = false;
    consentTime = null;
    consentOverride = false;
    noticeH = 0;
    noticeEl.style.height = '';
    frameEl.style.height = '0px';
    progressBarEl.style.transform = 'scaleX(0)';
    consentBtnEl.setAttribute('aria-expanded', 'true');
  }

  // 계산 겹: 동의 순간 안내 블록의 실측 高さ(noticeH)를 접힘 진행도(p)에 맞춰
  // 그대로 프레임 高さ 증가분으로 넘긴다 — 안내가 접히는 만큼 프레임이 자란다.
  function apply(t) {
    var dotOpacity = 0.86 + 0.14 * Math.sin(2 * Math.PI * t / DOT_MS);
    if (!consented) {
      statusDotEl.style.opacity = dotOpacity.toFixed(3);
      return;
    }
    var elapsed = t - consentTime;
    if (elapsed < 0) elapsed += CYCLE_MS;
    var p = easeOutCubic(Math.min(1, elapsed / CONSENT_FOLD_MS));
    noticeEl.style.height = (noticeH * (1 - p)).toFixed(1) + 'px';
    frameEl.style.height = (FRAME_BASE_H + noticeH * p).toFixed(1) + 'px';
    var sweepSpan = CYCLE_MS - CONSENT_AT - CONSENT_FOLD_MS;
    var sweepP = Math.max(0, Math.min(1, (elapsed - CONSENT_FOLD_MS) / sweepSpan));
    progressBarEl.style.transform = 'scaleX(' + sweepP.toFixed(3) + ')';
  }

  if (reduce) {
    apply(0);
    return;
  }

  var start = null;
  function loop(ts) {
    if (start === null) start = ts;
    var raw = ts - start;
    var t = raw % CYCLE_MS;
    if (t < prevT) resetToIdle();
    prevT = t;
    if (!consented && (consentOverride || t >= CONSENT_AT)) enterConsent(t);
    apply(t);
    requestAnimationFrame(loop);
  }
  requestAnimationFrame(loop);
})();

import { useEffect, useRef } from "react";
import styles from "./EmbedConsentPlaceholder.module.scss";

// 동의 후 불러오는 임베드(09) — 안내 블록의 실측 높이를 접힘 진행도에 맞춰
// 그대로 프레임 높이로 넘긴다(계산 겹). 실키·실서버 요청 없음.
// 동의 버튼 클릭 시 즉시 전환(실사용자 리스너 있음).
const CYCLE_MS = 2000;
const CONSENT_AT = 700;
const CONSENT_FOLD_MS = 200;
const DOT_MS = 700;

function mulberry32(seed: number) {
  let a = seed >>> 0;
  return function () {
    a |= 0;
    a = (a + 0x6d2b79f5) | 0;
    let t = Math.imul(a ^ (a >>> 15), 1 | a);
    t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t;
    return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
  };
}

function drawSeedThumb(canvas: HTMLCanvasElement, seed: number) {
  const ctx = canvas.getContext("2d");
  if (!ctx) return;
  const rnd = mulberry32(seed);
  const w = canvas.width;
  const h = canvas.height;
  const hues = [216, 32, 268, 168];
  ctx.fillStyle = "hsl(" + hues[Math.floor(rnd() * hues.length)] + ", 38%, 22%)";
  ctx.fillRect(0, 0, w, h);
  for (let i = 0; i < 6; i++) {
    const cx = rnd() * w;
    const cy = rnd() * h;
    const r = (0.18 + rnd() * 0.3) * Math.min(w, h);
    ctx.fillStyle =
      "hsla(" +
      hues[Math.floor(rnd() * hues.length)] +
      ", " +
      (44 + rnd() * 22).toFixed(1) +
      "%, " +
      (38 + rnd() * 26).toFixed(1) +
      "%, .5)";
    ctx.beginPath();
    ctx.arc(cx, cy, r, 0, Math.PI * 2);
    ctx.fill();
  }
  ctx.fillStyle = "rgba(255, 247, 230, .06)";
  for (let j = 0; j < h; j += 4) ctx.fillRect(0, j, w, 1);
}

function easeOutCubic(p: number) {
  return 1 - Math.pow(1 - p, 3);
}

export default function EmbedConsentPlaceholder() {
  const noticeRef = useRef<HTMLDivElement>(null);
  const frameRef = useRef<HTMLDivElement>(null);
  const frameThumbRef = useRef<HTMLCanvasElement>(null);
  const statusDotRef = useRef<HTMLSpanElement>(null);
  const consentBtnRef = useRef<HTMLButtonElement>(null);
  const progressBarRef = useRef<HTMLDivElement>(null);
  const consentOverrideRef = useRef(false);

  useEffect(() => {
    const notice = noticeRef.current;
    const frame = frameRef.current;
    const frameThumb = frameThumbRef.current;
    const statusDot = statusDotRef.current;
    const consentBtn = consentBtnRef.current;
    const progressBar = progressBarRef.current;
    if (!notice || !frame || !frameThumb || !statusDot || !consentBtn || !progressBar) return;
    const reduce = window.matchMedia("(prefers-reduced-motion: reduce)").matches;
    const narrow = window.matchMedia("(max-width: 340px)").matches;
    const FRAME_BASE_H = narrow ? 56 : 96;

    drawSeedThumb(frameThumb, 109);

    let consented = false;
    let consentTime = 0;
    let noticeH = 0;
    let prevT = 0;

    function enterConsent(t: number) {
      consented = true;
      consentTime = t;
      consentOverrideRef.current = false;
      noticeH = notice!.offsetHeight;
      consentBtn!.setAttribute("aria-expanded", "false");
    }

    function resetToIdle() {
      consented = false;
      noticeH = 0;
      notice!.style.height = "";
      frame!.style.height = "0px";
      progressBar!.style.transform = "scaleX(0)";
      consentBtn!.setAttribute("aria-expanded", "true");
    }

    // 계산 겹: 동의 순간 안내 블록의 실측 높이(noticeH)를 접힘 진행도(p)에 맞춰
    // 그대로 프레임 높이 증가분으로 넘긴다 — 안내가 접히는 만큼 프레임이 자란다.
    function apply(t: number) {
      const dotOpacity = 0.86 + 0.14 * Math.sin((2 * Math.PI * t) / DOT_MS);
      if (!consented) {
        statusDot!.style.opacity = dotOpacity.toFixed(3);
        return;
      }
      let elapsed = t - consentTime;
      if (elapsed < 0) elapsed += CYCLE_MS;
      const p = easeOutCubic(Math.min(1, elapsed / CONSENT_FOLD_MS));
      notice!.style.height = (noticeH * (1 - p)).toFixed(1) + "px";
      frame!.style.height = (FRAME_BASE_H + noticeH * p).toFixed(1) + "px";
      const sweepSpan = CYCLE_MS - CONSENT_AT - CONSENT_FOLD_MS;
      const sweepP = Math.max(0, Math.min(1, (elapsed - CONSENT_FOLD_MS) / sweepSpan));
      progressBar!.style.transform = "scaleX(" + sweepP.toFixed(3) + ")";
    }

    if (reduce) {
      apply(0);
      return;
    }

    let start: number | null = null;
    let raf = 0;
    function loop(ts: number) {
      if (start === null) start = ts;
      const raw = ts - start;
      const t = raw % CYCLE_MS;
      if (t < prevT) resetToIdle();
      prevT = t;
      if (!consented && (consentOverrideRef.current || t >= CONSENT_AT)) enterConsent(t);
      apply(t);
      raf = requestAnimationFrame(loop);
    }
    raf = requestAnimationFrame(loop);
    return () => cancelAnimationFrame(raf);
  }, []);

  function handleConsent() {
    consentOverrideRef.current = true;
  }

  return (
    <div className={styles.stage}>
      <section className={styles.panel}>
        <div className={styles.card}>
          <div className={styles.notice} ref={noticeRef}>
            <div className={styles.noticeHead}>
              <span className={styles.statusDot} ref={statusDotRef} aria-hidden="true" />
              <span className={styles.noticeLead}>이 영상은 외부 서비스에서 불러옵니다.</span>
            </div>
            <p className={styles.noticeSub}>동의하면 이 자리에 불러옵니다.</p>
            <button
              type="button"
              className={styles.consentBtn}
              ref={consentBtnRef}
              aria-expanded="true"
              onClick={handleConsent}
            >
              동의하고 불러오기
            </button>
          </div>
          <div className={styles.frame} ref={frameRef} aria-hidden="true">
            <canvas className={styles.frameThumb} ref={frameThumbRef} width={240} height={80} />
            <div className={styles.frameScrim} />
            <div className={styles.frameContent}>
              <span className={styles.framePlay} aria-hidden="true" />
              <span className={styles.frameLabel}>동의 후 재생되는 영상</span>
            </div>
            <div className={styles.progressTrack}>
              <div className={styles.progressBar} ref={progressBarRef} />
            </div>
          </div>
        </div>
      </section>
    </div>
  );
}