phase 3 - ical import/export

src/app/page.tsx

@@ -8,6 +8,7 @@ import { Input } from '@/components/ui/input'
 import { type CalendarEvent } from '@/lib/types'
 
 import { addEvent, deleteEvent, getAllEvents, clearEvents } from '@/lib/db'
+import { parseICS, generateICS } from '@/lib/ical'
 
 export default function HomePage() {
   const [events, setEvents] = useState<CalendarEvent[]>([])
@@ -15,7 +16,6 @@ export default function HomePage() {
   const [title, setTitle] = useState('')
   const [start, setStart] = useState('')
 
-  // Load events only in the browser
   useEffect(() => {
     (async () => {
       const stored = await getAllEvents()
@@ -42,11 +42,61 @@ export default function HomePage() {
     setEvents([])
   }
 
+  // --- IMPORT ---
+  const handleImport = async (file: File) => {
+    const text = await file.text()
+    const parsed = parseICS(text)
+
+    // Save to DB and update state
+    for (const ev of parsed) {
+      await addEvent(ev)
+    }
+    const stored = await getAllEvents()
+    setEvents(stored)
+  }
+
+  // --- EXPORT ---
+  const handleExport = () => {
+    const icsData = generateICS(events)
+    const blob = new Blob([icsData], { type: 'text/calendar' })
+    const url = URL.createObjectURL(blob)
+
+    const a = document.createElement('a')
+    a.href = url
+    a.download = 'events.ics'
+    document.body.appendChild(a)
+    a.click()
+    document.body.removeChild(a)
+    URL.revokeObjectURL(url)
+  }
+
   return (
-    <div>
-      <div className="flex gap-2">
+    <div className="space-y-4">
+      <div className="flex gap-2 flex-wrap">
         <Button onClick={() => setOpen(true)}>Add Event</Button>
-        {events.length > 0 && <Button variant="destructive" onClick={handleClearAll}>Clear All</Button>}
+        {events.length > 0 && (
+          <>
+            <Button variant="secondary" onClick={handleExport}>
+              Export .ics
+            </Button>
+            <Button variant="destructive" onClick={handleClearAll}>
+              Clear All
+            </Button>
+          </>
+        )}
+        <label className="cursor-pointer">
+          <span className="px-3 py-2 bg-blue-500 text-white rounded">Import .ics</span>
+          <input
+            type="file"
+            accept=".ics"
+            hidden
+            onChange={e => {
+              if (e.target.files?.length) {
+                handleImport(e.target.files[0])
+              }
+            }}
+          />
+        </label>
       </div>
 
       <ul className="mt-4 space-y-2">

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();
+}