feat: implement Kijiji scraping API endpoint

This commit introduces a new API endpoint that allows users to search for items on Kijiji.
The endpoint accepts a search query as a header or query parameter and returns a JSON response containing the search results. It also handles cases where no query is provided or no results are found, returning appropriate error responses.

src/index.ts

@@ -1,6 +1,54 @@
 import fetchKijijiItems from "./kijiji";
 
-const SEARCH_QUERY = "playstation 5";
-const items = await fetchKijijiItems(SEARCH_QUERY);
+const PORT = process.env.PORT || 4005;
 
-console.log(items);
+const server = Bun.serve({
+	port: PORT,
+	idleTimeout: 0,
+	routes: {
+		// Static routes
+		"/api/status": new Response("OK"),
+
+		// Dynamic routes
+		"/api/kijiji": async (req: Request) => {
+			const reqUrl = new URL(req.url);
+
+			const SEARCH_QUERY =
+				req.headers.get("query") || reqUrl.searchParams.get("q") || null;
+			if (!SEARCH_QUERY)
+				return Response.json(
+					{
+						message:
+							"Request didn't have 'query' header or 'q' search parameter!",
+					},
+					{ status: 400 },
+				);
+
+			const items = await fetchKijijiItems(SEARCH_QUERY);
+			if (!items)
+				return Response.json(
+					{ message: "Search didn't return any results!" },
+					{ status: 404 },
+				);
+			return Response.json(items, { status: 200 });
+		},
+
+		// Wildcard route for all routes that start with "/api/" and aren't otherwise matched
+		"/api/*": Response.json({ message: "Not found" }, { status: 404 }),
+
+		// // Serve a file by buffering it in memory
+		// "/favicon.ico": new Response(await Bun.file("./favicon.ico").bytes(), {
+		//   headers: {
+		//     "Content-Type": "image/x-icon",
+		//   },
+		// }),
+	},
+
+	// (optional) fallback for unmatched routes:
+	// Required if Bun's version < 1.2.3
+	fetch(req: Request) {
+		return new Response("Not Found", { status: 404 });
+	},
+});
+
+console.log(`Serving on ${server.hostname}:${server.port}`);