Limit number of fetched conversations in the API (#954)

* Limit number of fetched conversations in the API

* Add pagination

* use var

src/routes/api/conversations/+server.ts

@@ -2,7 +2,11 @@ import { collections } from "$lib/server/database";
 import { authCondition } from "$lib/server/auth";
 import type { Conversation } from "$lib/types/Conversation";
 
-export async function GET({ locals }) {
+const NUM_PER_PAGE = 300;
+
+export async function GET({ locals, url }) {
+	const p = parseInt(url.searchParams.get("p") ?? "0");
+
 	if (locals.user?._id || locals.sessionId) {
 		const convs = await collections.conversations
 			.find({
@@ -14,6 +18,8 @@ export async function GET({ locals }) {
 				model: 1,
 			})
 			.sort({ updatedAt: -1 })
+			.skip(p * NUM_PER_PAGE)
+			.limit(NUM_PER_PAGE)
 			.toArray();
 
 		const res = convs.map((conv) => ({