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import { type NextRequest } from "next/server";
import {
ChatHistory,
ChatHistoryZod,
convertChatHistoryList,
SourcesFromApi,
} from "@repo/shared-types";
import { ensureAuth } from "../ensureAuth";
import { z } from "zod";
import { db } from "@/server/db";
import { chatHistory as chatHistoryDb, chatThreads } from "@repo/db/schema";
import { and, eq, gt, sql } from "drizzle-orm";
import { join } from "path";
export const runtime = "edge";
export async function POST(req: NextRequest) {
const session = await ensureAuth(req);
if (!session) {
return new Response("Unauthorized", { status: 401 });
}
if (!process.env.BACKEND_SECURITY_KEY) {
return new Response("Missing BACKEND_SECURITY_KEY", { status: 500 });
}
const ip = req.headers.get("cf-connecting-ip");
if (ip) {
if (process.env.RATELIMITER) {
const { success } = await process.env.RATELIMITER.limit({
key: `chat-${ip}`,
});
if (!success) {
console.error("rate limit exceeded");
return new Response("Rate limit exceeded", { status: 429 });
}
} else {
console.info("RATELIMITER not found in env");
}
} else {
console.info("cf-connecting-ip not found in headers");
}
const lastHour = new Date(new Date().getTime() - 3600000);
// Only allow 5 requests per hour for each user, something lke this but this one is bad because chathistory.userid doesnt exist, we have to do a join and get it from the threads table
const result = await db
.select({
count: sql<number>`count(*)`.mapWith(Number),
})
.from(chatHistoryDb)
.innerJoin(chatThreads, eq(chatHistoryDb.threadId, chatThreads.id))
.where(
and(
eq(chatThreads.userId, session.user.id),
gt(chatHistoryDb.createdAt, lastHour),
),
)
.execute();
if (result[0]?.count && result[0]?.count >= 5) {
// return new Response(`Too many requests ${result[0]?.count}`, { status: 429 });
console.log(result[0]?.count);
} else {
console.log("count", result);
}
const url = new URL(req.url);
const query = url.searchParams.get("q");
const spaces = url.searchParams.get("spaces");
const sourcesOnly = url.searchParams.get("sourcesOnly") ?? "false";
const proMode = url.searchParams.get("proMode") === "true";
const jsonRequest = (await req.json()) as {
chatHistory: ChatHistory[];
sources: SourcesFromApi[] | undefined;
};
const { chatHistory, sources } = jsonRequest;
if (!query || query.trim.length < 0) {
return new Response(JSON.stringify({ message: "Invalid query" }), {
status: 400,
});
}
const validated = z.array(ChatHistoryZod).safeParse(chatHistory ?? []);
if (!validated.success) {
return new Response(
JSON.stringify({
message: "Invalid chat history",
error: validated.error,
}),
{ status: 400 },
);
}
const modelCompatible = await convertChatHistoryList(validated.data);
const resp = await fetch(
`${process.env.BACKEND_BASE_URL}/api/chat?query=${query}&user=${session.user.id}&sourcesOnly=${sourcesOnly}&spaces=${spaces}&proMode=${proMode}`,
{
headers: {
Authorization: `Bearer ${process.env.BACKEND_SECURITY_KEY}`,
"Content-Type": "application/json",
},
method: "POST",
body: JSON.stringify({
chatHistory: modelCompatible,
sources,
}),
},
);
if (sourcesOnly == "true") {
const data = (await resp.json()) as SourcesFromApi;
return new Response(JSON.stringify(data), { status: 200 });
}
if (resp.status !== 200 || !resp.ok) {
const errorData = await resp.text();
console.log(errorData);
return new Response(
JSON.stringify({ message: "Error in CF function", error: errorData }),
{ status: resp.status },
);
}
return resp;
}
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