feat(caldav): export CalDavFeedItemType const (#46)

Replace hardcoded "caldav-event" string with a
CalDavFeedItemType const object, matching the pattern
used by google-calendar and weatherkit packages.

Co-authored-by: Ona <no-reply@ona.com>

packages/aris-source-caldav/src/caldav-source.ts

@@ -4,10 +4,10 @@ import { TimeRelevance, UnknownActionError } from "@aris/core"
 import { DAVClient } from "tsdav"
 
 import type { CalDavDAVClient, CalDavEventData, CalDavFeedItem } from "./types.ts"
-import { CalDavEventStatus } from "./types.ts"
 
 import { CalDavCalendarKey, type CalendarContext } from "./calendar-context.ts"
 import { parseICalEvents } from "./ical-parser.ts"
+import { CalDavEventStatus, CalDavFeedItemType } from "./types.ts"
 
 // -- Source options --
 
@@ -340,7 +340,7 @@ export function computeSignals(
 function createFeedItem(event: CalDavEventData, now: Date, timeZone?: string): CalDavFeedItem {
 	return {
 		id: `caldav-event-${event.uid}${event.recurrenceId ? `-${event.recurrenceId}` : ""}`,
-		type: "caldav-event",
+		type: CalDavFeedItemType.Event,
 		timestamp: now,
 		data: event,
 		signals: computeSignals(event, now, timeZone),

packages/aris-source-caldav/src/index.ts

@@ -5,6 +5,7 @@ export {
 	AttendeeRole,
 	AttendeeStatus,
 	CalDavEventStatus,
+	CalDavFeedItemType,
 	type CalDavAlarm,
 	type CalDavAttendee,
 	type CalDavDAVCalendar,

packages/aris-source-caldav/src/types.ts

@@ -64,9 +64,17 @@ export interface CalDavEventData extends Record<string, unknown> {
 	recurrenceId: string | null
 }
 
+// -- Feed item type --
+
+export const CalDavFeedItemType = {
+	Event: "caldav-event",
+} as const
+
+export type CalDavFeedItemType = (typeof CalDavFeedItemType)[keyof typeof CalDavFeedItemType]
+
 // -- Feed item --
 
-export type CalDavFeedItem = FeedItem<"caldav-event", CalDavEventData>
+export type CalDavFeedItem = FeedItem<typeof CalDavFeedItemType.Event, CalDavEventData>
 
 // -- DAV client interface --