refactor: events to a pure stream instead of being part of topics

NOTE: tests are passing, but the client is broken

public/api/channels/:channel_id/events/:event_id/index.ts

@@ -0,0 +1,40 @@
+import { EVENT, EVENTS } from '../../../../../../models/event.ts';
+import { CHANNEL, CHANNELS } from '../../../../../../models/channel.ts';
+import * as CANNED_RESPONSES from '../../../../../../utils/canned_responses.ts';
+import { get_session, get_user, PRECHECK_TABLE, require_user } from '../../../../../../utils/prechecks.ts';
+
+export const PRECHECKS: PRECHECK_TABLE = {};
+
+// GET /api/channels/:channel_id/events/:id - Get an event
+PRECHECKS.GET = [get_session, get_user, require_user, async (_req: Request, meta: Record<string, any>): Promise<Response | undefined> => {
+	const channel_id: string = meta.params?.channel_id?.toLowerCase().trim() ?? '';
+
+	// lurid is 49 chars as we use them, eg: "also-play-flow-want-form-wide-thus-work-burn-same"
+	const channel: CHANNEL | null = channel_id.length === 49 ? await CHANNELS.get(channel_id) : null;
+
+	if (!channel) {
+		return CANNED_RESPONSES.not_found();
+	}
+
+	meta.channel = channel;
+	const channel_is_public = channel.permissions.read.length === 0;
+	const user_has_read_for_channel = channel_is_public || channel.permissions.read.includes(meta.user.id);
+	const channel_has_public_events = user_has_read_for_channel && (channel.permissions.events.read.length === 0);
+	const user_has_read_events_for_channel = user_has_read_for_channel &&
+		(channel_has_public_events || channel.permissions.events.read.includes(meta.user.id));
+
+	if (!user_has_read_events_for_channel) {
+		return CANNED_RESPONSES.permission_denied();
+	}
+}];
+export async function GET(_req: Request, meta: Record<string, any>): Promise<Response> {
+	const event: EVENT | null = await EVENTS.get(meta.params.event_id);
+
+	if (!event) {
+		return CANNED_RESPONSES.not_found();
+	}
+
+	return Response.json(event, {
+		status: 200
+	});
+}