hk-bus-eta/esm/sunferry.js

Query the ETA (Estimated Time of Arrival) of HK Bus/Minibus/MTR/Lightrail

import { TZDate } from "@date-fns/tz";
import { add, closestTo, endOfMinute, formatISO, max, set, startOfMinute, sub, } from "date-fns";
import { getUpcomingFerry, isSafari } from "./utils";
export default async function fetchEtas({ route, seq, freq, holidays, serviceDayMap, }) {
    if (seq > 1) {
        return Promise.resolve([]);
    }
    const apiEtas = await fetch(`https://www.sunferry.com.hk/eta/?route=${route}`, {
        cache: isSafari ? "default" : "no-store",
    })
        .then((response) => response.json())
        .then(({ data, generated_timestamp, }) => {
        if (!data)
            return [];
        return data.map(({ depart_time, eta, rmk_en, rmk_tc, route_tc, route_en }) => {
            var _a, _b;
            /**
             * @param timeString HH:mm
             */
            const guessDateTimeByTimeString = (timeString) => {
                const generated = new TZDate(generated_timestamp, "Asia/Hong_Kong");
                const time = startOfMinute(set(generated, {
                    hours: parseInt(timeString.split(":")[0], 10),
                    minutes: parseInt(timeString.split(":")[1], 10),
                }));
                return closestTo(generated, [
                    sub(time, { days: 1 }),
                    time,
                    add(time, { days: 1 }),
                ]);
            };
            // 橫水渡 - (坪洲-梅窩)
            // 中環 - 長洲
            const [originZh, destZh] = (((_a = /^橫水渡 - \((.*)\)$/.exec(route_tc)) === null || _a === void 0 ? void 0 : _a[1]) || route_tc)
                .split("-")
                .map((s) => s.trim());
            // Inter Islands (Peng Chau - Mui Wo)
            // Central - Cheung Chau
            const [originEn, destEn] = (((_b = /^Inter Islands \((.*)\)$/.exec(route_en)) === null || _b === void 0 ? void 0 : _b[1]) || route_en)
                .split("-")
                .map((s) => s.trim());
            return {
                departTime: formatISO(guessDateTimeByTimeString(depart_time)),
                eta: eta ? formatISO(guessDateTimeByTimeString(eta)) : null,
                remark: {
                    zh: rmk_tc !== null && rmk_tc !== void 0 ? rmk_tc : "",
                    en: rmk_en !== null && rmk_en !== void 0 ? rmk_en : "",
                },
                dest: {
                    zh: destZh,
                    en: destEn,
                },
                co: "sunferry",
            };
        });
    })
        .catch((err) => {
        console.error("Error fetching Sun Ferry ETAs:", err);
        return [];
    });
    if (seq === 0) {
        const greatestApiEtaTime = apiEtas.length > 0
            ? max(apiEtas.map((e) => new Date(e.departTime)))
            : undefined;
        const now = new Date();
        return [
            ...apiEtas
                .filter((eta) => endOfMinute(new Date(eta.departTime)) >= now && !eta.eta)
                .map((eta) => ({
                eta: eta.departTime,
                remark: {
                    zh: [eta.remark.zh, "預定班次"].filter(Boolean).join("；"),
                    en: [eta.remark.en, "Scheduled"].filter(Boolean).join("; "),
                },
                dest: eta.dest,
                co: eta.co,
            })),
            ...getUpcomingFerry({
                holidays,
                serviceDayMap,
                freq,
                date: max([
                    ...(greatestApiEtaTime
                        ? [add(greatestApiEtaTime, { minutes: 1 })]
                        : []),
                    now,
                ]),
            })
                .filter((v) => new Date(v).getTime() - now.getTime() < 180 * 60 * 1000)
                .map((eta) => ({
                eta: eta,
                remark: {
                    zh: "預定班次",
                    en: "Scheduled",
                },
                dest: {
                    zh: "",
                    en: "",
                },
                co: "sunferry",
            })),
        ];
    }
    else if (seq === 1) {
        return apiEtas
            .filter((eta) => eta.eta !== null)
            .map((eta) => ({
            eta: eta.eta,
            remark: {
                zh: eta.remark.zh,
                en: eta.remark.en,
            },
            dest: eta.dest,
            co: eta.co,
        }));
    }
    else {
        return [];
    }
}
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