08Avatar assignee picker

<main class="stage">
  <div class="av is-demo is-open">
    <span class="av__label" id="av-label">Assignee</span>
    <button class="av__btn" type="button" id="av-btn" aria-haspopup="listbox" aria-expanded="true" aria-controls="av-list" aria-labelledby="av-label av-name">
      <span class="av__slot-wrap">
        <span class="av__empty av__slot av__slot--a"><svg viewBox="0 0 256 256" width="14" height="14"><g fill="currentColor"><path d="M192 96a64 64 0 1 1-64-64a64 64 0 0 1 64 64" opacity=".2"/><path d="M230.92 212c-15.23-26.33-38.7-45.21-66.09-54.16a72 72 0 1 0-73.66 0c-27.39 8.94-50.86 27.82-66.09 54.16a8 8 0 1 0 13.85 8c18.84-32.56 52.14-52 89.07-52s70.23 19.44 89.07 52a8 8 0 1 0 13.85-8M72 96a56 56 0 1 1 56 56a56.06 56.06 0 0 1-56-56"/></g></svg></span>
        <span class="av__pic av__pic--b av__slot av__slot--b" aria-hidden="true">PS</span>
      </span>
      <span class="av__name" id="av-name">
        <span class="av__slot av__slot--a">Unassigned</span>
        <span class="av__slot av__slot--b" aria-hidden="true">Peter Park</span>
      </span>
      <span class="av__caret" aria-hidden="true"><svg viewBox="0 0 256 256" width="12" height="12"><g fill="currentColor"><path d="m208 96l-80 80l-80-80Z" opacity=".2"/><path d="M215.39 92.94A8 8 0 0 0 208 88H48a8 8 0 0 0-5.66 13.66l80 80a8 8 0 0 0 11.32 0l80-80a8 8 0 0 0 1.73-8.72M128 164.69L67.31 104h121.38Z"/></g></svg></span>
    </button>
    <ul class="av__list" id="av-list" role="listbox" aria-labelledby="av-label" tabindex="-1">
      <li class="av__opt" id="av-o1" role="option" aria-selected="false">
        <span class="av__pic av__pic--a">KH</span>
        <span class="av__who">Hana Kim</span>
        <span class="av__dot av__dot--on" title="Online"></span>
      </li>
      <li class="av__opt av__opt--b" id="av-o2" role="option" aria-selected="false">
        <span class="av__pic av__pic--b">PS</span>
        <span class="av__who">Peter Park</span>
        <span class="av__dot av__dot--away" title="Away"></span>
      </li>
      <li class="av__opt" id="av-o3" role="option" aria-selected="false">
        <span class="av__pic av__pic--c">LD</span>
        <span class="av__who">Leo Lee</span>
        <span class="av__dot" title="Offline"></span>
      </li>
    </ul>
  </div>
</main>

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

$duration: $dur-quick;
$easing: $ease-pop;
$color: $subject-blue;

@include stage($stage-paper);

.av {
  position: relative;
  box-sizing: border-box;
  width: min(212px, 84vw);
  // 열린 목록은 absolute 라 높이에 안 잡힌다 — 그만큼 아래를 비워 둔다
  padding-bottom: 104px;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  color: $stage-ink;
}
.av__label {
  display: block;
  font-size: 10px; line-height: 12px; font-weight: 800;
  letter-spacing: .04em;
  color: rgba(23, 20, 26, .72);
  margin: 0 0 $sp-1;
}
.av__btn {
  box-sizing: border-box;
  width: 100%; height: 32px;
  display: flex; align-items: center; gap: $sp-2;
  padding: 0 $sp-2;
  border: 1px solid rgba(23, 20, 26, .16);
  background: #fff;
  border-radius: $r-control;
  color: $stage-ink;
  font-family: inherit;
  font-size: 12px; font-weight: 700;
  cursor: pointer;
}
.av__slot-wrap, .av__name { display: inline-grid; }
.av__slot { grid-area: 1 / 1; place-self: center start; }
.av__slot--b { opacity: 0; }
.av__empty {
  display: inline-flex; align-items: center; justify-content: center;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: rgba(23, 20, 26, .07);
  color: rgba(23, 20, 26, .4);
}
.av__pic {
  display: inline-flex; align-items: center; justify-content: center;
  width: 22px; height: 22px;
  border-radius: 50%;
  color: #fff;
  font-size: 9px; font-weight: 800;
  letter-spacing: .02em;
}
.av__pic--a { background: #2f8f6d; color: $subject-ink; }   // 흰 이니셜 3.98:1 — 잉크 4.58:1
.av__pic--b { background: #9c9fce; }
.av__pic--c { background: #ba9273; color: $subject-ink; }   // 흰 이니셜 3.60:1 — 잉크 5.07:1
.av__caret { margin-left: auto; display: inline-flex; color: rgba(23, 20, 26, .4); }

.av__list {
  position: absolute;
  top: 52px; left: 0; right: 0;
  box-sizing: border-box;
  margin: 0; padding: $sp-1;
  list-style: none;
  background: #fff;
  border-radius: $r-card;
  box-shadow: $shadow-raised;
  opacity: 0;
  transform: translateY(-4px);
  pointer-events: none;
  transition: opacity $duration $easing, transform $duration $easing;
}
.av.is-open .av__list { opacity: 1; transform: translateY(0); pointer-events: auto; }
.av__opt {
  position: relative;
  isolation: isolate;
  box-sizing: border-box;
  height: 30px;
  display: flex; align-items: center; gap: $sp-2;
  padding: 0 $sp-2;
  border-radius: $r-sm;
  font-size: 12px; font-weight: 600;
  cursor: pointer;
}
.av__opt::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: $r-sm;
  background: rgba(47, 109, 246, .12);
  opacity: 0;
}
.av__opt[aria-selected="true"]::after, .av__opt.is-at::after, .av__opt:hover::after { opacity: 1; }
.av__who { color: rgba(23, 20, 26, .82); }
.av__dot {
  margin-left: auto;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: rgba(23, 20, 26, .22);
}
.av__dot--on { background: #50a26e; }
.av__dot--away { background: #bea57a; }

// ── 자동 루프: 두 번째 사람이 눌리면 빈 아바타 자리가 그 사람으로 채워졌다가 다시 비워진다 ──
// 트리거의 빈 자리와 채워진 아바타는 겹쳐 놓은 두 겹이라 steps(1) 로 한 번에 갈아 끼운다
.av.is-demo .av__slot--a { animation: av-swap-a $dur-loop steps(1, end) infinite; }
.av.is-demo .av__slot--b { animation: av-swap-b $dur-loop steps(1, end) infinite; }
.av.is-demo .av__opt--b::after { animation: av-in $dur-loop $easing infinite; }
.av.is-demo .av__opt--b .av__pic { animation: av-pop $dur-loop $easing infinite; }
@keyframes av-swap-a {
  0%, 25%   { opacity: 1; }
  26%, 73%  { opacity: 0; }
  74%, 100% { opacity: 1; }
}
@keyframes av-swap-b {
  0%, 25%   { opacity: 0; }
  26%, 73%  { opacity: 1; }
  74%, 100% { opacity: 0; }
}
@keyframes av-in {
  0%, 100% { opacity: 0; transform: scale(.4); }
  26%, 74% { opacity: 1; transform: scale(1); }
}
@keyframes av-pop {
  0%, 100% { transform: scale(1); }
  20%      { transform: scale(1.18); }
  40%, 74% { transform: scale(1); }
}

@media (prefers-reduced-motion: reduce) {
  .av.is-demo .av__slot--a, .av.is-demo .av__slot--b,
  .av.is-demo .av__opt--b::after, .av.is-demo .av__opt--b .av__pic { animation: none !important; }
  .av__list { transition: none; }
}

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

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

.av {
  position: relative;
  box-sizing: border-box;
  width: min(212px, 84vw);
  padding-bottom: 104px;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  color: #17141a;
}

.av__label {
  display: block;
  font-size: 10px;
  line-height: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: rgba(23, 20, 26, 0.72);
  margin: 0 0 4px;
}

.av__btn {
  box-sizing: border-box;
  width: 100%;
  height: 32px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 8px;
  border: 1px solid rgba(23, 20, 26, 0.16);
  background: #fff;
  border-radius: 12px;
  color: #17141a;
  font-family: inherit;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}

.av__slot-wrap, .av__name {
  display: inline-grid;
}

.av__slot {
  grid-area: 1/1;
  place-self: center start;
}

.av__slot--b {
  opacity: 0;
}

.av__empty {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(23, 20, 26, 0.07);
  color: rgba(23, 20, 26, 0.4);
}

.av__pic {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  color: #fff;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.av__pic--a {
  background: #2f8f6d;
  color: #17141a;
}

.av__pic--b {
  background: #9c9fce;
}

.av__pic--c {
  background: #ba9273;
  color: #17141a;
}

.av__caret {
  margin-left: auto;
  display: inline-flex;
  color: rgba(23, 20, 26, 0.4);
}

.av__list {
  position: absolute;
  top: 52px;
  left: 0;
  right: 0;
  box-sizing: border-box;
  margin: 0;
  padding: 4px;
  list-style: none;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  opacity: 0;
  transform: translateY(-4px);
  pointer-events: none;
  transition: opacity 220ms cubic-bezier(0.2, 1.4, 0.4, 1), transform 220ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.av.is-open .av__list {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.av__opt {
  position: relative;
  isolation: isolate;
  box-sizing: border-box;
  height: 30px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 8px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}

.av__opt::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: 8px;
  background: rgba(47, 109, 246, 0.12);
  opacity: 0;
}

.av__opt[aria-selected=true]::after, .av__opt.is-at::after, .av__opt:hover::after {
  opacity: 1;
}

.av__who {
  color: rgba(23, 20, 26, 0.82);
}

.av__dot {
  margin-left: auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(23, 20, 26, 0.22);
}

.av__dot--on {
  background: #50a26e;
}

.av__dot--away {
  background: #bea57a;
}

.av.is-demo .av__slot--a {
  animation: av-swap-a 2s steps(1, end) infinite;
}

.av.is-demo .av__slot--b {
  animation: av-swap-b 2s steps(1, end) infinite;
}

.av.is-demo .av__opt--b::after {
  animation: av-in 2s cubic-bezier(0.2, 1.4, 0.4, 1) infinite;
}

.av.is-demo .av__opt--b .av__pic {
  animation: av-pop 2s cubic-bezier(0.2, 1.4, 0.4, 1) infinite;
}

@keyframes av-swap-a {
  0%, 25% {
    opacity: 1;
  }
  26%, 73% {
    opacity: 0;
  }
  74%, 100% {
    opacity: 1;
  }
}
@keyframes av-swap-b {
  0%, 25% {
    opacity: 0;
  }
  26%, 73% {
    opacity: 1;
  }
  74%, 100% {
    opacity: 0;
  }
}
@keyframes av-in {
  0%, 100% {
    opacity: 0;
    transform: scale(0.4);
  }
  26%, 74% {
    opacity: 1;
    transform: scale(1);
  }
}
@keyframes av-pop {
  0%, 100% {
    transform: scale(1);
  }
  20% {
    transform: scale(1.18);
  }
  40%, 74% {
    transform: scale(1);
  }
}
@media (prefers-reduced-motion: reduce) {
  .av.is-demo .av__slot--a, .av.is-demo .av__slot--b,
  .av.is-demo .av__opt--b::after, .av.is-demo .av__opt--b .av__pic {
    animation: none !important;
  }
  .av__list {
    transition: none;
  }
}

// 실제 동작: 사람을 고르면 버튼의 빈 아바타 자리가 그 사람의 이니셜 원으로 채워진다.
var root = document.querySelector('.av');
var btn = document.getElementById('av-btn');
var list = document.getElementById('av-list');
var wrap = root.querySelector('.av__slot-wrap');
var name = document.getElementById('av-name');
var opts = [].slice.call(list.querySelectorAll('.av__opt'));
var at = 0;
function open(on) {
  root.classList.remove('is-demo');
  root.classList.toggle('is-open', on);
  btn.setAttribute('aria-expanded', String(on));
  if (on) list.focus({ preventScroll: true });
}
function pick(i) {
  root.classList.remove('is-demo');
  at = i;
  opts.forEach(function (o, k) { o.setAttribute('aria-selected', String(k === i)); });
  var pic = opts[i].querySelector('.av__pic');
  wrap.innerHTML = '<span class="' + pic.className + '">' + pic.textContent + '</span>';
  name.textContent = opts[i].querySelector('.av__who').textContent;
  open(false);
  btn.focus({ preventScroll: true });
}
btn.addEventListener('click', function () { open(!root.classList.contains('is-open')); });
opts.forEach(function (o, i) { o.addEventListener('click', function () { pick(i); }); });
list.addEventListener('keydown', function (e) {
  if (e.key === 'ArrowDown' || e.key === 'ArrowUp') {
    at = Math.max(0, Math.min(at + (e.key === 'ArrowDown' ? 1 : -1), opts.length - 1));
    opts.forEach(function (o, k) { o.classList.toggle('is-at', k === at); });
    list.setAttribute('aria-activedescendant', opts[at].id);
    e.preventDefault();
  } else if (e.key === 'Enter' || e.key === ' ') { pick(at); e.preventDefault(); }
  else if (e.key === 'Escape') { open(false); btn.focus({ preventScroll: true }); }
});
document.addEventListener('click', function (e) { if (!e.target.closest('.av')) open(false); });

import { useEffect, useRef, useState } from "react";
import type { CSSProperties } from "react";
import styles from "./AssigneeSelect.module.scss";

export type Assignee = {
  initials: string;
  name: string;
  status: "online" | "away" | "offline";
};

export type AssigneeSelectProps = {
  label?: string;
  emptyText?: string;
  people?: Assignee[];
  duration?: number;
  easing?: string;
  color?: string;
};

type Vars = CSSProperties & { "--duration"?: string; "--easing"?: string; "--color"?: string };
type KeyEvt = { key: string; preventDefault: () => void };
type ChangeEvt = { target: { value: string } };
type ClickEvt = { stopPropagation: () => void };

const DEFAULT_PEOPLE: Assignee[] = [
  { initials: "HK", name: "Hana Kim", status: "online" },
  { initials: "PP", name: "Peter Park", status: "away" },
  { initials: "LL", name: "Leo Lee", status: "offline" },
];

const TONES = [styles.picA, styles.picB, styles.picC];
const STATUS_TEXT: Record<Assignee["status"], string> = {
  online: "Online",
  away: "Away",
  offline: "Offline",
};
const STATUS_CLASS: Record<Assignee["status"], string> = {
  online: styles.dotOn,
  away: styles.dotAway,
  offline: "",
};

export default function AssigneeSelect({
  label = "Assignee",
  emptyText = "Unassigned",
  people = DEFAULT_PEOPLE,
  duration = 180,
  easing = "cubic-bezier(.34,1.56,.64,1)",
  color = "#2f6df6",
}: AssigneeSelectProps) {
  const [open, setOpen] = useState(false);
  const [picked, setPicked] = useState<number | null>(null);
  const [active, setActive] = useState(0);
  const rootRef = useRef<HTMLDivElement>(null);
  const btnRef = useRef<HTMLButtonElement>(null);
  const listRef = useRef<HTMLUListElement>(null);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };
  const current = picked === null ? null : people[picked];

  useEffect(() => {
    function onDocClick(e: MouseEvent) {
      if (rootRef.current && !rootRef.current.contains(e.target as Node)) setOpen(false);
    }
    document.addEventListener("click", onDocClick);
    return () => document.removeEventListener("click", onDocClick);
  }, []);

  useEffect(() => {
    if (open) listRef.current?.focus({ preventScroll: true });
  }, [open]);

  function pick(i: number) {
    setPicked(i);
    setActive(i);
    setOpen(false);
    btnRef.current?.focus({ preventScroll: true });
  }

  return (
    <div className={`${styles.av} ${open ? styles.isOpen : ""}`} style={vars} ref={rootRef}>
      <span className={styles.label} id="av-label">{label}</span>
      <button
        ref={btnRef}
        type="button"
        id="av-btn"
        className={styles.btn}
        aria-haspopup="listbox"
        aria-expanded={open}
        aria-controls="av-list"
        aria-labelledby="av-label av-name"
        onClick={() => setOpen((o) => !o)}
      >
        {current === null ? (
          <span className={styles.empty}>
            <svg viewBox="0 0 256 256" width="14" height="14" aria-hidden="true">
              <g fill="currentColor">
                <path d="M192 96a64 64 0 1 1-64-64a64 64 0 0 1 64 64" opacity=".2" />
                <path d="M230.92 212c-15.23-26.33-38.7-45.21-66.09-54.16a72 72 0 1 0-73.66 0c-27.39 8.94-50.86 27.82-66.09 54.16a8 8 0 1 0 13.85 8c18.84-32.56 52.14-52 89.07-52s70.23 19.44 89.07 52a8 8 0 1 0 13.85-8M72 96a56 56 0 1 1 56 56a56.06 56.06 0 0 1-56-56" />
              </g>
            </svg>
          </span>
        ) : (
          <span className={`${styles.pic} ${TONES[(picked ?? 0) % TONES.length]}`}>{current.initials}</span>
        )}
        <span className={styles.name} id="av-name">{current === null ? emptyText : current.name}</span>
        <span className={styles.caret} aria-hidden="true">
          <svg viewBox="0 0 256 256" width="12" height="12">
            <g fill="currentColor">
              <path d="m208 96l-80 80l-80-80Z" opacity=".2" />
              <path d="M215.39 92.94A8 8 0 0 0 208 88H48a8 8 0 0 0-5.66 13.66l80 80a8 8 0 0 0 11.32 0l80-80a8 8 0 0 0 1.73-8.72M128 164.69L67.31 104h121.38Z" />
            </g>
          </svg>
        </span>
      </button>
      <ul
        ref={listRef}
        id="av-list"
        className={styles.list}
        role="listbox"
        aria-labelledby="av-label"
        aria-activedescendant={`av-o${active}`}
        tabIndex={-1}
        onKeyDown={(e: KeyEvt) => {
          if (e.key === "ArrowDown") { setActive((a) => Math.min(a + 1, people.length - 1)); e.preventDefault(); }
          else if (e.key === "ArrowUp") { setActive((a) => Math.max(a - 1, 0)); e.preventDefault(); }
          else if (e.key === "Enter" || e.key === " ") { pick(active); e.preventDefault(); }
          else if (e.key === "Escape") { setOpen(false); btnRef.current?.focus({ preventScroll: true }); }
        }}
      >
        {people.map((p, i) => (
          <li
            key={p.name}
            id={`av-o${i}`}
            className={`${styles.opt} ${i === active ? styles.isAt : ""} ${i === picked ? styles.isPicked : ""}`}
            role="option"
            aria-selected={i === picked}
            onMouseMove={() => setActive(i)}
            onClick={() => pick(i)}
          >
            <span className={`${styles.pic} ${TONES[i % TONES.length]}`}>{p.initials}</span>
            <span className={styles.who}>{p.name}</span>
            <span className={`${styles.dot} ${STATUS_CLASS[p.status]}`} title={STATUS_TEXT[p.status]} />
          </li>
        ))}
      </ul>
    </div>
  );
}