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TypeScript

import type { RequestHandler } from './$types';
import { getDb } from '$lib/server/db';
import { sha256Hex } from '$lib/server/crypto';
import { icsHorizonMonths } from '$lib/server/env';
import { buildIcsCalendar } from '$lib/server/ics';
function toIsoSql(d = new Date()): string {
return d.toISOString().replace('T', ' ').replace('Z', '');
}
function ymdUTC(date: Date): string {
const yyyy = String(date.getUTCFullYear()).padStart(4, '0');
const mm = String(date.getUTCMonth() + 1).padStart(2, '0');
const dd = String(date.getUTCDate()).padStart(2, '0');
return `${yyyy}-${mm}-${dd}`;
}
function addMonthsUTC(date: Date, months: number): Date {
const d = new Date(Date.UTC(date.getUTCFullYear(), date.getUTCMonth(), date.getUTCDate()));
d.setUTCMonth(d.getUTCMonth() + months);
return d;
}
export const GET: RequestHandler = async ({ params, request }) => {
const db = await getDb();
const token = params.token || '';
if (!token) return new Response('Not Found', { status: 404 });
const tokenHash = await sha256Hex(token);
const row = db
.prepare(
`SELECT id, type, user_id, group_id, revoked_at
FROM calendar_tokens
WHERE token_hash = ?
LIMIT 1`
)
.get(tokenHash) as any;
if (!row) return new Response('Not Found', { status: 404 });
if (row.revoked_at) return new Response('Gone', { status: 410 });
if (String(row.type) !== 'group' || !row.group_id) return new Response('Not Found', { status: 404 });
// Validar estado del grupo (activo y no archivado); en caso contrario, tratar como feed caducado
const gRow = db
.prepare(`SELECT COALESCE(active,1) as active, COALESCE(archived,0) as archived FROM groups WHERE id = ?`)
.get(row.group_id) as any;
if (!gRow || Number(gRow.active || 0) !== 1 || Number(gRow.archived || 0) === 1) {
db.prepare(`UPDATE calendar_tokens SET last_used_at = ? WHERE id = ?`).run(toIsoSql(), row.id);
return new Response('Gone', { status: 410 });
}
const today = new Date();
const startYmd = ymdUTC(today);
const endYmd = ymdUTC(addMonthsUTC(today, icsHorizonMonths));
const tasks = db
.prepare(
`SELECT t.id, t.description, t.due_date, g.name AS group_name
FROM tasks t
LEFT JOIN groups g ON g.id = t.group_id
WHERE t.group_id = ?
AND COALESCE(t.completed, 0) = 0
AND t.due_date IS NOT NULL
AND t.due_date >= ? AND t.due_date <= ?
AND NOT EXISTS (SELECT 1 FROM task_assignments a WHERE a.task_id = t.id)
ORDER BY t.due_date ASC, t.id ASC`
)
.all(row.group_id, startYmd, endYmd) as Array<{ id: number; description: string; due_date: string; group_name: string | null }>;
const events = tasks.map((t) => ({
id: t.id,
description: t.description,
due_date: t.due_date,
group_name: t.group_name || null,
prefix: 'T'
}));
const { body, etag } = await buildIcsCalendar('Tareas sin responsable (grupo)', events);
// 304 si ETag coincide
const inm = request.headers.get('if-none-match');
if (inm && inm === etag) {
// Actualizar last_used_at aunque sea 304
db.prepare(`UPDATE calendar_tokens SET last_used_at = ? WHERE id = ?`).run(toIsoSql(), row.id);
return new Response(null, { status: 304, headers: { ETag: etag, 'Cache-Control': 'public, max-age=300' } });
}
db.prepare(`UPDATE calendar_tokens SET last_used_at = ? WHERE id = ?`).run(toIsoSql(), row.id);
return new Response(body, {
status: 200,
headers: {
'content-type': 'text/calendar; charset=utf-8',
'cache-control': 'public, max-age=300',
ETag: etag
}
});
};