@kahi-ui/framework/util/datetime/months.js

Straight-forward Svelte UI for the Web

import { Temporal } from "../../vendor/js-temporal-polyfill";
import { DEFAULT_LOCALE, DEFAULT_MONTH, DEFAULT_YEAR } from "../locale";
import { from_datestamp, to_datestamp } from "./datestamps";
const DEFAULT_FORMAT_OPTIONS = {
    month: DEFAULT_MONTH,
    year: DEFAULT_YEAR,
};
const RESET_UNITS = {
    day: 1,
};
export function add_months(datestamp, months) {
    const date = from_datestamp(datestamp).add({ months });
    return to_datestamp(date);
}
export function clamp_month(datestamp, minimum, maximum, inclusive = false) {
    // NOTE: Yeah a bit long-winded handling the comparison logic and day manipulation, but
    // we want to preserve the input day instead of resetting it all the time
    const source_date = from_datestamp(datestamp);
    const month_date = source_date.with(RESET_UNITS);
    if (maximum) {
        const maximum_date = from_datestamp(maximum, RESET_UNITS);
        if (Temporal.PlainDate.compare(maximum_date, month_date) < (inclusive ? 0 : 1)) {
            return to_datestamp(maximum_date, { day: source_date.day });
        }
    }
    if (minimum) {
        const minimum_date = from_datestamp(minimum, RESET_UNITS);
        if (Temporal.PlainDate.compare(minimum_date, month_date) > (inclusive ? 0 : -1)) {
            return to_datestamp(minimum_date, { day: source_date.day });
        }
    }
    return to_datestamp(source_date);
}
export function format_month(datestamp, locale = DEFAULT_LOCALE, options = DEFAULT_FORMAT_OPTIONS) {
    const date = from_datestamp(datestamp);
    return date.toLocaleString(locale, options);
}
export function get_month(datestamp) {
    return from_datestamp(datestamp).month;
}
export function includes_month(datestamp, targets) {
    const source_date = from_datestamp(datestamp, RESET_UNITS);
    return !!targets.find((target, index) => {
        const target_date = from_datestamp(target, RESET_UNITS);
        return source_date.equals(target_date);
    });
}
export function is_month(datestamp, target) {
    const source_date = from_datestamp(datestamp, RESET_UNITS);
    const target_date = from_datestamp(target, RESET_UNITS);
    return source_date.equals(target_date);
}
export function is_month_in_range(datestamp, minimum, maximum, inclusive = false) {
    const date = from_datestamp(datestamp, RESET_UNITS);
    if (maximum) {
        const maximum_date = from_datestamp(maximum, RESET_UNITS);
        if (Temporal.PlainDate.compare(maximum_date, date) < (inclusive ? 0 : 1))
            return false;
    }
    if (minimum) {
        const minimum_date = from_datestamp(minimum, RESET_UNITS);
        if (Temporal.PlainDate.compare(minimum_date, date) > (inclusive ? 0 : -1))
            return false;
    }
    return true;
}
export function now_month() {
    const date = Temporal.Now.plainDateISO();
    return to_datestamp(date, RESET_UNITS);
}
export function set_month(datestamp, month) {
    const date = from_datestamp(datestamp).with({ month });
    return to_datestamp(date);
}
export function subtract_months(datestamp, months) {
    const date = from_datestamp(datestamp).subtract({ months });
    return to_datestamp(date);
}