77 lines
2.3 KiB
TypeScript
77 lines
2.3 KiB
TypeScript
import { rangeDates } from "@/lib/planMeta";
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import type { TripItem } from "@/lib/types";
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function pad(n: number) {
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return String(n).padStart(2, "0");
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}
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function formatDate(d: Date): string {
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return `${d.getFullYear()}${pad(d.getMonth() + 1)}${pad(d.getDate())}`;
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}
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function formatStamp(d = new Date()): string {
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return `${formatDate(d)}T${pad(d.getHours())}${pad(d.getMinutes())}${pad(d.getSeconds())}Z`;
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}
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function escapeText(s: string): string {
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return s.replace(/\\/g, "\\\\").replace(/;/g, "\\;").replace(/,/g, "\\,").replace(/\n/g, "\\n");
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}
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export interface IcsStop extends TripItem {
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offset: number;
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}
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/** Build an ICS calendar from plan stops (requires startMonth YYYY-MM). */
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export function buildPlanIcs(opts: {
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title: string;
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startMonth: string;
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stops: IcsStop[];
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}): string | null {
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if (!opts.startMonth || opts.stops.length === 0) return null;
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const now = formatStamp();
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const lines = [
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"BEGIN:VCALENDAR",
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"VERSION:2.0",
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"PRODID:-//nomadro//Move Plan//CN",
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"CALSCALE:GREGORIAN",
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"METHOD:PUBLISH",
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`X-WR-CALNAME:${escapeText(opts.title || "nomadro 旅居计划")}`,
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];
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opts.stops.forEach((stop, i) => {
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const range = rangeDates(opts.startMonth, stop.offset, stop.months);
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if (!range) return;
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const summary = `${stop.emoji} ${stop.name}, ${stop.country}`;
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const descParts = [
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`停留 ${stop.months} 个月`,
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`约 ¥${(stop.cost * stop.months).toLocaleString()}`,
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stop.note ? `备注：${stop.note}` : "",
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"由 nomadro 旅居计划中心生成",
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].filter(Boolean);
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lines.push(
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"BEGIN:VEVENT",
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`UID:nomadro-${stop.slug}-${i}@nomadro.com`,
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`DTSTAMP:${now}`,
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`DTSTART;VALUE=DATE:${formatDate(range.start)}`,
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`DTEND;VALUE=DATE:${formatDate(range.endExclusive)}`,
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`SUMMARY:${escapeText(summary)}`,
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`DESCRIPTION:${escapeText(descParts.join(" · "))}`,
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`LOCATION:${escapeText(`${stop.name}, ${stop.country}`)}`,
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"END:VEVENT"
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);
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});
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lines.push("END:VCALENDAR");
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return lines.join("\r\n");
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}
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export function downloadPlanIcs(filename: string, ics: string) {
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const blob = new Blob([ics], { type: "text/calendar;charset=utf-8" });
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const url = URL.createObjectURL(blob);
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const a = document.createElement("a");
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a.href = url;
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a.download = filename;
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a.click();
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URL.revokeObjectURL(url);
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}
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