feat: add sandbox

lib/api.ts

@@ -0,0 +1,25 @@
+import { BASE_URL } from "./consts";
+
+export const api = async (url: string, options?: RequestInit) => {
+  const res = await fetch(BASE_URL + "/api" + url, options);
+  if (!res.ok) {
+    const body = await res.text().catch(() => null);
+    throw new APIError(body || res.statusText, res.status);
+  }
+
+  const contentType = res.headers.get("content-type");
+  if (contentType?.includes("application/json")) {
+    return res.json();
+  }
+
+  return res.text();
+};
+
+export class APIError extends Error {
+  code: number;
+
+  constructor(message: string, statusCode?: number) {
+    super(message);
+    this.code = typeof statusCode === "number" ? statusCode : 400;
+  }
+}