Source

// "Your boards": boards this browser made, claimed or opened, with the admin key when it has one.
// Lives only in this browser; the admin link carries the key to another device.
export interface MyBoard { id: string; title: string; key?: string; at: number }

const KEY = "tasks:boards";

export function myBoards(): MyBoard[] {
  try {
    const list = JSON.parse(localStorage.getItem(KEY) || "[]");
    return Array.isArray(list) ? list.filter((b) => b && typeof b.id === "string").sort((a, b) => b.at - a.at) : [];
  } catch {
    return [];
  }
}

export function rememberBoard(board: Partial<MyBoard> & { id: string }) {
  const list = myBoards();
  const prev = list.find((b) => b.id === board.id);
  const next = { title: "", ...prev, ...board, at: Date.now() };
  try {
    localStorage.setItem(KEY, JSON.stringify([next, ...list.filter((b) => b.id !== board.id)].slice(0, 200)));
  } catch { /* storage full or blocked: the board still works */ }
}

export function forgetBoard(id: string) {
  try {
    localStorage.setItem(KEY, JSON.stringify(myBoards().filter((b) => b.id !== id)));
  } catch { /* nothing to forget */ }
}

export const boardKey = (id: string) => myBoards().find((b) => b.id === id)?.key;