vremel/dist/datetime/fromRfc7231.js

JavaScript date utility library for Temporal API

import { isInstantConstructor, isZonedDateTimeConstructor, } from "../type-utils.js";
import { formatExactTimeIso } from "./_formatExactTimeIso.js";
import { getDayOfWeekFromYmd } from "./_getDayOfWeekFromYmd.js";
import { getDayOfWeekNumberFromAbbreviation } from "./_getDayOfWeekNumberFromAbbreviation.js";
import { getMonthNumberFromAbbreviation } from "./_getMonthNumberFromAbbreviation.js";
const regex = /^([A-Za-z]{3}), (\d\d) ([A-Za-z]{3}) (\d{4}) (\d\d):(\d\d):(\d\d) GMT$/;
function parse(date) {
    const result = regex.exec(date);
    if (result === null) {
        throw new Error("Invalid format");
    }
    const [, dayOfWeek, day, monthName, year, hour, minute, second] = result;
    if (dayOfWeek === undefined ||
        day === undefined ||
        monthName === undefined ||
        year === undefined ||
        hour === undefined ||
        minute === undefined ||
        second === undefined) {
        throw new Error("something wrong");
    }
    const y = parseInt(year);
    const m = getMonthNumberFromAbbreviation(monthName);
    const d = parseInt(day);
    const weekNum = getDayOfWeekNumberFromAbbreviation(dayOfWeek);
    if (getDayOfWeekFromYmd(y, m, d) !== weekNum) {
        throw new Error(`Wrong day of week: ${dayOfWeek}`);
    }
    return [y, m, d, parseInt(hour), parseInt(minute), parseInt(second)];
}
/**
 * Creates Temporal object from datetime string in RFC 7231's format (HTTP date format)
 * such as `Mon, 01 Jan 2024 01:23:45 GMT`.
 * This function doesn't support obsoleted formats.
 *
 * @param date datetime string in RFC 7231's format
 * @param TemporalClass Temporal class (such as `Temporal.PlainDateTime` or `Temporal.Instant`) which will be returned
 * @returns an instance of Temporal class specified in `TemporalClass` argument
 */
export function fromRfc7231(date, TemporalClass) {
    const result = parse(date);
    const [year, month, day, hour, minute, second] = result;
    if (isInstantConstructor(TemporalClass)) {
        return TemporalClass.from(formatExactTimeIso(year, month, day, hour, minute, second, 0, "Z"));
    }
    if (isZonedDateTimeConstructor(TemporalClass)) {
        return TemporalClass.from({
            year,
            month,
            day,
            hour,
            minute,
            second,
            calendarId: "iso8601",
            timeZone: "UTC",
        });
    }
    return TemporalClass.from({
        year,
        month,
        day,
        hour,
        minute,
        second,
        calendarId: "iso8601",
    });
}
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