Many an update!

server/api/events/[id]/calendar.get.js

@@ -0,0 +1,103 @@
+import Event from "../../../models/event";
+
+export default defineEventHandler(async (event) => {
+  const id = getRouterParam(event, "id");
+
+  if (!id) {
+    throw createError({
+      statusCode: 400,
+      statusMessage: "Event ID is required",
+    });
+  }
+
+  try {
+    // Find event by ID or slug
+    const eventData = await Event.findOne({
+      $or: [{ _id: id }, { slug: id }],
+      isVisible: true,
+      isCancelled: { $ne: true },
+    }).select("title slug description startDate endDate location");
+
+    if (!eventData) {
+      throw createError({
+        statusCode: 404,
+        statusMessage: "Event not found",
+      });
+    }
+
+    // Generate iCal format for single event
+    const ical = generateSingleEventCalendar(eventData);
+
+    // Set headers for download
+    const filename = `${eventData.slug || eventData._id}.ics`;
+    setHeader(event, "Content-Type", "text/calendar; charset=utf-8");
+    setHeader(
+      event,
+      "Content-Disposition",
+      `attachment; filename="${filename}"`
+    );
+    setHeader(event, "Cache-Control", "no-cache");
+
+    return ical;
+  } catch (error) {
+    console.error("Error generating event calendar:", error);
+
+    if (error.statusCode) {
+      throw error;
+    }
+
+    throw createError({
+      statusCode: 500,
+      statusMessage: "Failed to generate calendar file",
+    });
+  }
+});
+
+function generateSingleEventCalendar(evt) {
+  const now = new Date();
+  const timestamp = now
+    .toISOString()
+    .replace(/[-:]/g, "")
+    .replace(/\.\d{3}/, "");
+
+  const eventStart = new Date(evt.startDate);
+  const eventEnd = new Date(evt.endDate);
+
+  const dtstart = eventStart
+    .toISOString()
+    .replace(/[-:]/g, "")
+    .replace(/\.\d{3}/, "");
+  const dtend = eventEnd
+    .toISOString()
+    .replace(/[-:]/g, "")
+    .replace(/\.\d{3}/, "");
+
+  // Clean description for iCal format
+  const description = (evt.description || "")
+    .replace(/\n/g, "\\n")
+    .replace(/,/g, "\\,");
+
+  const eventUrl = `https://ghostguild.org/events/${evt.slug || evt._id}`;
+
+  const ical = [
+    "BEGIN:VCALENDAR",
+    "VERSION:2.0",
+    "PRODID:-//Ghost Guild//Events//EN",
+    "CALSCALE:GREGORIAN",
+    "METHOD:PUBLISH",
+    "BEGIN:VEVENT",
+    `UID:${evt._id}@ghostguild.org`,
+    `DTSTAMP:${timestamp}`,
+    `DTSTART:${dtstart}`,
+    `DTEND:${dtend}`,
+    `SUMMARY:${evt.title}`,
+    `DESCRIPTION:${description}\\n\\nView event: ${eventUrl}`,
+    `LOCATION:${evt.location || "Online"}`,
+    `URL:${eventUrl}`,
+    `STATUS:CONFIRMED`,
+    "END:VEVENT",
+    "END:VCALENDAR",
+  ];
+
+  return ical.join("\r\n");
+}