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import { add, parse, format, startOfWeek, addWeeks, isWithinInterval, Duration } from "date-fns";
import { RecurringTask } from "./db";
import config from "./config";
const INTERVAL_ABBREVS: Record<string, number> = {
pv: 1,
vk: 7,
kk: 30,
v: 365,
};
export const now = (): Date => {
return new Date(new Date().toLocaleString("en-US", { timeZone: config.tz }));
};
export const parseInterval = (intervalStr: string): Duration => {
const match = /^(\d+)(pv|vk|kk|v)$/.exec(intervalStr);
if (!match) throw new Error(`Virheellinen intervalli: "${intervalStr}"`);
const num = parseInt(match[1]);
const days = num * INTERVAL_ABBREVS[match[2]];
return { days };
};
export const getNextDate = (task: RecurringTask): Date => {
if (!task.last_done) return now();
const lastDate = parse(task.last_done, "yyyy-MM-dd", now());
return add(lastDate, parseInterval(task.interval));
};
export const isThisWeek = (task: RecurringTask): boolean => {
const nextDate = getNextDate(task);
const weekStart = startOfWeek(now(), { weekStartsOn: 1 });
const weekEnd = addWeeks(weekStart, 1);
return isWithinInterval(nextDate, { start: weekStart, end: weekEnd });
};
export const formatDate = (d: Date): string => format(d, "yyyy-MM-dd");
export const today = (): string => format(now(), "yyyy-MM-dd");
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