project-structure.ts

import { toTaskView } from "./views.js";

type ItemType = "to-do" | "project" | "heading";
type ItemStatus = "incomplete" | "canceled" | "completed";
type StartBucket = "Inbox" | "Anytime" | "Someday" | "";

type ChecklistItem = {
  id: string;
  title: string;
  status: ItemStatus;
  stopDate: string | null;
};

type TaskLike = {
  id: string;
  type: ItemType;
  title: string;
  status: ItemStatus;
  trashed: boolean;
  notes: string;
  start: StartBucket;
  startDate: string | null;
  deadline: string | null;
  deadlineSuppressed: boolean;
  stopDate: string | null;
  created: string | null;
  modified: string | null;
  areaId: string | null;
  areaTitle: string | null;
  projectId: string | null;
  projectTitle: string | null;
  headingId: string | null;
  headingTitle: string | null;
  tags: string[];
  checklist: ChecklistItem[];
  index: number;
  todayIndex: number;
};

export function buildProjectStructure(tasks: TaskLike[], projectUuid: string) {
  const project = tasks.find(
    (task) => task.type === "project" && task.id === projectUuid && !task.trashed
  );

  if (!project) {
    throw new Error(`Project not found: ${projectUuid}`);
  }

  const headings = tasks.filter(
    (task) => task.type === "heading" && task.projectId === projectUuid && !task.trashed
  );
  const todos = tasks.filter(
    (task) => task.type === "to-do" && task.projectId === projectUuid && !task.trashed
  );
  const todosWithoutHeading = todos.filter((task) => !task.headingId);

  return {
    project,
    headings,
    todos,
    todosWithoutHeading,
    compact: {
      project: toTaskView(project, "compact"),
      headings: headings.map((heading) => ({
        ...toTaskView(heading, "compact"),
        todoCount: todos.filter((task) => task.headingId === heading.id).length,
      })),
      todosWithoutHeading: todosWithoutHeading.map((task) => toTaskView(task, "compact")),
      counts: {
        headings: headings.length,
        todos: todos.length,
        todosWithoutHeading: todosWithoutHeading.length,
      },
    },
  };
}