phase 3 - ical import/export

src/lib/ical.ts

@@ -0,0 +1,43 @@
+import ICAL from "ical.js";
+import type { CalendarEvent } from "@/lib/types";
+
+export function parseICS(icsString: string): CalendarEvent[] {
+	const jcalData = ICAL.parse(icsString);
+	const comp = new ICAL.Component(jcalData);
+	const vevents = comp.getAllSubcomponents("vevent");
+
+	return vevents.map((v) => {
+		const ev = new ICAL.Event(v);
+		return {
+			id: ev.uid || crypto.randomUUID(),
+			title: ev.summary || "Untitled Event",
+			start: ev.startDate.toJSDate().toISOString().split("T")[0],
+			end: ev.endDate
+				? ev.endDate.toJSDate().toISOString().split("T")[0]
+				: undefined,
+			description: ev.description || "",
+		};
+	});
+}
+
+export function generateICS(events: CalendarEvent[]): string {
+	const comp = new ICAL.Component(["vcalendar", [], []]);
+	comp.addPropertyWithValue("version", "2.0");
+	comp.addPropertyWithValue("prodid", "-//YourAppName//EN");
+
+	events.forEach((ev) => {
+		const vevent = new ICAL.Component("vevent");
+		vevent.addPropertyWithValue("uid", ev.id);
+		vevent.addPropertyWithValue("summary", ev.title);
+		vevent.addPropertyWithValue("dtstart", ICAL.Time.fromDateString(ev.start));
+		if (ev.end) {
+			vevent.addPropertyWithValue("dtend", ICAL.Time.fromDateString(ev.end));
+		}
+		if (ev.description) {
+			vevent.addPropertyWithValue("description", ev.description);
+		}
+		comp.addSubcomponent(vevent);
+	});
+
+	return comp.toString();
+}