feat: finish basic functions

app/requests.ts

@@ -0,0 +1,38 @@
+import type { ChatRequest, ChatReponse } from "./api/chat/typing";
+import { Message } from "./store";
+
+export async function requestChat(messages: Message[]) {
+  const req: ChatRequest = {
+    model: "gpt-3.5-turbo",
+    messages: messages
+      .map((v) => ({
+        role: v.role,
+        content: v.content,
+      }))
+      .filter((m) => m.role !== "assistant"),
+  };
+
+  const res = await fetch("/api/chat", {
+    method: "POST",
+    headers: {
+      "Content-Type": "application/json",
+    },
+    body: JSON.stringify(req),
+  });
+
+  return (await res.json()) as ChatReponse;
+}
+
+export async function requestWithPrompt(messages: Message[], prompt: string) {
+  messages = messages.concat([
+    {
+      role: "system",
+      content: prompt,
+      date: new Date().toLocaleString(),
+    },
+  ]);
+
+  const res = await requestChat(messages);
+
+  return res.choices.at(0)?.message?.content ?? "";
+}