refactor: abstract heavy database queries (resolves #10)

src/lib/server/db/queries.ts

@@ -0,0 +1,16 @@
+import { db } from '$lib/server/db';
+import { aktis, ratings } from '$lib/server/db/schema';
+import { avg, eq } from 'drizzle-orm';
+
+export async function getAktisWithAvgRating() {
+	return await db
+		.select({
+			id: aktis.id,
+			title: aktis.title,
+			summary: aktis.summary,
+			rating: avg(ratings.rating)
+		})
+		.from(aktis)
+		.leftJoin(ratings, eq(aktis.id, ratings.aktiId))
+		.groupBy(aktis.id, aktis.title, aktis.summary);
+}

src/routes/+page.server.ts

@@ -1,19 +1,8 @@
-import { db } from '$lib/server/db';
-import { aktis, ratings } from '$lib/server/db/schema';
-import { avg, eq } from 'drizzle-orm';
+import { getAktisWithAvgRating } from '$lib/server/db/queries';
 import type { PageServerLoad } from './$types';
 
 export const load: PageServerLoad = async () => {
-	const a = await db
-		.select({
-			id: aktis.id,
-			title: aktis.title,
-			summary: aktis.summary,
-			rating: avg(ratings.rating)
-		})
-		.from(aktis)
-		.leftJoin(ratings, eq(aktis.id, ratings.aktiId))
-		.groupBy(aktis.id, aktis.title, aktis.summary);
+	const a = await getAktisWithAvgRating();
 
 	return {
 		aktis: a.map((a) => ({ ...a, rating: a.rating ? parseFloat(a.rating) : undefined }))