rename lib/conversion to lib/capi; fix exports

src/lib/capi/handle.ts

@@ -0,0 +1,76 @@
+import { json, type RequestHandler } from '@sveltejs/kit';
+import { StatusCodes } from 'http-status-codes';
+import { getFbpFbcFromCookies } from '../metapixel/fbc.ts';
+import type { CAPIConnector } from './connector.ts';
+import { getRequestIP } from '../util/ip.ts';
+import * as v from 'valibot';
+import { CAPIEvent, MetaServerEventParamsSchema, type CAPICustomerInfoParams } from './event.ts';
+
+export const capiRequestBodySchema = v.object({
+	events: v.array(MetaServerEventParamsSchema)
+});
+
+/** Request body for conversion events */
+export type CAPIRequestBody = v.InferOutput<typeof capiRequestBodySchema>;
+
+export const capiErrorBodySchema = v.object({
+	error: v.string()
+});
+
+/** Returned by the conversion request handler in case of an error */
+export type CAPIErrorBody = v.InferOutput<typeof capiErrorBodySchema>;
+
+export const capiResponseBodySchema = v.object({
+	pixelID: v.string(),
+	fbTraceID: v.string(),
+	receivedEvents: v.number(),
+	processedEvents: v.number(),
+	messages: v.array(v.string())
+});
+
+/** Returned by the conversion request handler in case of a successful response */
+export type CAPIResponseBody = v.InferOutput<typeof capiResponseBodySchema>;
+
+/**
+ * Creates a SvelteKit request handler for processing conversion events.
+ *
+ * @param connector - The CAPIConnector instance to send events through.
+ * @returns A SvelteKit RequestHandler function.
+ */
+export const createCAPIHandler: (connector: CAPIConnector) => RequestHandler = (connector) => {
+	const handle: RequestHandler = async ({ request, getClientAddress, cookies }) => {
+		try {
+			const json = await request.json();
+			const parsed = v.parse(capiRequestBodySchema, json);
+
+			// Build enriched user data with IP, user agent, and fbp/fbc from cookies
+			const ip = getRequestIP(request, getClientAddress);
+			const ua = request.headers.get('user-agent') ?? undefined;
+			const { fbp, fbc } = getFbpFbcFromCookies(cookies);
+
+			const enrichedUserData: Partial<CAPICustomerInfoParams> = {
+				clientIP: ip,
+				clientUserAgent: ua,
+				fbp,
+				fbc
+			};
+
+			// Enrich each event's user data
+			const events: CAPIEvent[] = parsed.events.map((eventParams) => {
+				const event = CAPIEvent.fromObject(eventParams);
+				event.enrichUserData(enrichedUserData);
+				return event;
+			});
+
+			// Send the event via the control
+			const response = await connector.sendEvents(events);
+			return json(response, { status: StatusCodes.OK });
+		} catch (e) {
+			const response: CAPIErrorBody = { error: e instanceof Error ? e.message : String(e) };
+			return json(response, {
+				status: StatusCodes.INTERNAL_SERVER_ERROR
+			});
+		}
+	};
+	return handle;
+};