Tablero kanban

"use client";

import { useState, type CSSProperties, type DragEvent } from "react";

/** Tablero kanban con arrastre nativo y botones para mover entre columnas (accesibles con teclado), contador por columna y anuncio del movimiento. Estilo claro de herramienta de proyectos. React + TypeScript, sin dependencias. */
export type DatosKanbanCard = { id: string; title: string; tag: string };
export type DatosKanbanColumn = { id: string; title: string; cards: DatosKanbanCard[] };

export type DatosKanbanProps = {
  columns?: DatosKanbanColumn[];
  onMove?: (cardId: string, from: string, to: string) => void;
  className?: string;
  style?: CSSProperties;
};

const CSS = `
.gcdkb-root { box-sizing: border-box; width: 100%; max-width: 760px; color: #1f2430; font: 500 14px/1.35 ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif; }
.gcdkb-root *, .gcdkb-root *::before, .gcdkb-root *::after { box-sizing: border-box; }
.gcdkb-root button { font: inherit; -webkit-tap-highlight-color: transparent; }
.gcdkb-root :focus-visible { outline: 2px solid #2563eb; outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { .gcdkb-root * { transition-duration: .01ms !important; animation: none !important; } }
.gcdkb-board { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.gcdkb-col { display: flex; flex-direction: column; gap: 10px; min-height: 280px; padding: 12px; border-radius: 14px; background: #f1f3f8; transition: background .15s, box-shadow .15s; }
.gcdkb-col[data-over="true"] { background: #e6ecfb; box-shadow: inset 0 0 0 2px #7b9bf0; }
.gcdkb-head { display: flex; align-items: center; justify-content: space-between; padding: 0 4px; font-weight: 700; }
.gcdkb-count { min-width: 24px; padding: 2px 8px; border-radius: 99px; background: #fff; color: #5b6477; font-size: 12px; text-align: center; font-variant-numeric: tabular-nums; }
.gcdkb-card { display: grid; gap: 8px; padding: 12px; border: 1px solid #e3e6ee; border-radius: 10px; background: #fff; cursor: grab; box-shadow: 0 1px 2px rgba(20, 30, 50, .06); animation: gcdkb-in .3s cubic-bezier(.16, 1, .3, 1); }
.gcdkb-card[data-drag="true"] { opacity: .4; }
.gcdkb-card:active { cursor: grabbing; }
.gcdkb-tag { justify-self: start; padding: 2px 8px; border-radius: 6px; background: #e8efff; color: #2456c8; font-size: 11px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; }
.gcdkb-moves { display: flex; justify-content: flex-end; gap: 4px; }
.gcdkb-mv { display: grid; place-items: center; width: 30px; height: 28px; border: 1px solid #e3e6ee; border-radius: 6px; background: #fff; color: #5b6477; cursor: pointer; }
.gcdkb-mv:hover:not(:disabled) { background: #f1f3f8; color: #1f2430; }
.gcdkb-mv:disabled { opacity: .3; cursor: not-allowed; }
.gcdkb-empty { margin: auto; color: #8b92a5; font-size: 13px; }
.gcdkb-live { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
@keyframes gcdkb-in { from { opacity: 0; transform: translateY(6px); } }
@media (max-width: 620px) { .gcdkb-board { grid-template-columns: 1fr; } .gcdkb-col { min-height: 0; } }`;

const DEFAULT: DatosKanbanColumn[] = [
  { id: "todo", title: "Por hacer", cards: [{ id: "a", title: "Definir alcance del módulo de reportes", tag: "Diseño" }, { id: "b", title: "Conectar con facturación", tag: "Integración" }] },
  { id: "doing", title: "En curso", cards: [{ id: "c", title: "Pantalla de inicio de sesión", tag: "Frontend" }] },
  { id: "done", title: "Hecho", cards: [{ id: "d", title: "Modelo de datos aprobado", tag: "Datos" }] },
];

export function DatosKanban({ columns = DEFAULT, onMove, className = "", style }: DatosKanbanProps) {
  const [cols, setCols] = useState(columns);
  const [drag, setDrag] = useState<{ id: string; from: string } | null>(null);
  const [over, setOver] = useState<string | null>(null);
  const [live, setLive] = useState("");

  function move(id: string, from: string, to: string) {
    if (from === to) return;
    setCols((prev) => {
      const card = prev.find((col) => col.id === from)?.cards.find((c) => c.id === id);
      if (!card) return prev;
      return prev.map((col) => (col.id === from ? { ...col, cards: col.cards.filter((c) => c.id !== id) } : col.id === to ? { ...col, cards: [...col.cards, card] } : col));
    });
    const name = cols.find((col) => col.id === to)?.title;
    setLive(`Tarjeta movida a ${name}`);
    onMove?.(id, from, to);
  }
  function drop(event: DragEvent, to: string) {
    event.preventDefault();
    if (drag) move(drag.id, drag.from, to);
    setDrag(null);
    setOver(null);
  }

  return (
    <div className={`gcdkb-root ${className}`} style={style}>
      <style>{CSS}</style>
      <div className="gcdkb-board">
        {cols.map((col, ci) => (
          <section key={col.id} className="gcdkb-col" data-over={over === col.id} aria-label={col.title} onDragOver={(event) => { event.preventDefault(); setOver(col.id); }} onDragLeave={() => setOver((value) => (value === col.id ? null : value))} onDrop={(event) => drop(event, col.id)}>
            <div className="gcdkb-head">
              {col.title}
              <span className="gcdkb-count">{col.cards.length}</span>
            </div>
            {col.cards.map((card) => (
              <article key={card.id} className="gcdkb-card" draggable data-drag={drag?.id === card.id} onDragStart={(event) => { event.dataTransfer.effectAllowed = "move"; event.dataTransfer.setData("text/plain", card.id); setDrag({ id: card.id, from: col.id }); }} onDragEnd={() => { setDrag(null); setOver(null); }}>
                <span className="gcdkb-tag">{card.tag}</span>
                <span>{card.title}</span>
                <span className="gcdkb-moves">
                  <button className="gcdkb-mv" type="button" aria-label={`Mover “${card.title}” a ${cols[ci - 1]?.title ?? ""}`} disabled={ci === 0} onClick={() => move(card.id, col.id, cols[ci - 1].id)}>
                    <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.4" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true"><path d="m15 6-6 6 6 6" /></svg>
                  </button>
                  <button className="gcdkb-mv" type="button" aria-label={`Mover “${card.title}” a ${cols[ci + 1]?.title ?? ""}`} disabled={ci === cols.length - 1} onClick={() => move(card.id, col.id, cols[ci + 1].id)}>
                    <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.4" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true"><path d="m9 6 6 6-6 6" /></svg>
                  </button>
                </span>
              </article>
            ))}
            {col.cards.length === 0 ? <p className="gcdkb-empty">Suelta una tarjeta aquí</p> : null}
          </section>
        ))}
      </div>
      <span className="gcdkb-live" role="status" aria-live="polite">{live}</span>
    </div>
  );
}

npx shadcn@latest add https://www.gassierconsulting.com/r/datos-kanban

import { DatosKanban } from "./datos-kanban";

export default function Ejemplo() {
  return <DatosKanban />;
}