added raw recurrence support

src/lib/ical.ts

@@ -1,25 +1,6 @@
 import ICAL from "ical.js";
 import type { CalendarEvent } from "@/lib/types";
 
-function valToString(val: unknown): string | undefined {
-	if (!val) return undefined;
-	if (typeof val === "string") return val;
-	if ((val as any).toString) return (val as any).toString();
-	return undefined;
-}
-
-function valToISOString(val: unknown): string | undefined {
-	if (!val) return undefined;
-	if (typeof val === "string") {
-		const d = new Date(val);
-		return isNaN(d.getTime()) ? undefined : d.toISOString();
-	}
-	if ((val as any).toJSDate) {
-		return (val as any).toJSDate().toISOString();
-	}
-	return undefined;
-}
-
 export function parseICS(icsString: string): CalendarEvent[] {
 	const jcalData = ICAL.parse(icsString);
 	const comp = new ICAL.Component(jcalData);
@@ -34,12 +15,23 @@ export function parseICS(icsString: string): CalendarEvent[] {
 			title: ev.summary || "Untitled Event",
 			description: ev.description || "",
 			location: ev.location || "",
-			url: valToString(v.getFirstPropertyValue("url")),
+			url: v.getFirstPropertyValue("url") || undefined,
 			start: ev.startDate.toJSDate().toISOString(),
 			end: ev.endDate ? ev.endDate.toJSDate().toISOString() : undefined,
 			allDay: isAllDay,
-			createdAt: valToISOString(v.getFirstPropertyValue("dtstamp")),
-			lastModified: valToISOString(v.getFirstPropertyValue("last-modified")),
+			createdAt: v.getFirstPropertyValue("dtstamp")
+				? (v.getFirstPropertyValue("dtstamp") as ICAL.Time)
+						.toJSDate()
+						.toISOString()
+				: undefined,
+			lastModified: v.getFirstPropertyValue("last-modified")
+				? (v.getFirstPropertyValue("last-modified") as ICAL.Time)
+						.toJSDate()
+						.toISOString()
+				: undefined,
+			recurrenceRule: v.getFirstPropertyValue("rrule")
+				? (v.getFirstPropertyValue("rrule") as ICAL.Recur).toString()
+				: undefined,
 		};
 	});
 }
@@ -58,30 +50,30 @@ export function generateICS(events: CalendarEvent[]): string {
 		if (ev.location) vevent.addPropertyWithValue("location", ev.location);
 		if (ev.url) vevent.addPropertyWithValue("url", ev.url);
 
+		// Start/End
 		if (ev.allDay) {
 			vevent.addPropertyWithValue(
 				"dtstart",
 				ICAL.Time.fromDateString(ev.start.split("T")[0]),
 			);
-			if (ev.end) {
+			if (ev.end)
 				vevent.addPropertyWithValue(
 					"dtend",
 					ICAL.Time.fromDateString(ev.end.split("T")[0]),
 				);
-			}
 		} else {
 			vevent.addPropertyWithValue(
 				"dtstart",
 				ICAL.Time.fromJSDate(new Date(ev.start)),
 			);
-			if (ev.end) {
+			if (ev.end)
 				vevent.addPropertyWithValue(
 					"dtend",
 					ICAL.Time.fromJSDate(new Date(ev.end)),
 				);
-			}
 		}
 
+		// Timestamps
 		vevent.addPropertyWithValue(
 			"dtstamp",
 			ICAL.Time.fromJSDate(ev.createdAt ? new Date(ev.createdAt) : new Date()),
@@ -93,6 +85,14 @@ export function generateICS(events: CalendarEvent[]): string {
 			);
 		}
 
+		// Recurrence
+		if (ev.recurrenceRule) {
+			vevent.addPropertyWithValue(
+				"rrule",
+				ICAL.Recur.fromString(ev.recurrenceRule),
+			);
+		}
+
 		comp.addSubcomponent(vevent);
 	});
 

src/lib/types.ts

@@ -1,12 +1,14 @@
 export type CalendarEvent = {
-	id: string; // UID
+	id: string;
 	title: string;
 	description?: string;
 	location?: string;
 	url?: string;
-	start: string; // ISO datetime
+	start: string;
 	end?: string;
 	allDay?: boolean;
 	createdAt?: string;
 	lastModified?: string;
+
+	recurrenceRule?: string;
 };