/*** UTILITY ------------------------------------------ ***/

import type { FetcherOptions, FetcherRequest } from "./types.ts";

/*** EXPORT ------------------------------------------- ***/

export function buildHeaders(options: FetcherOptions, req: FetcherRequest): Record<string, string> {
  return {
    "Content-Type": "application/json",
    ...options.headers,
    ...req.headers
  };
}

export async function postJson(
  fetchImpl: typeof globalThis.fetch,
  url: string,
  headers: Record<string, string>,
  body: unknown
): Promise<Record<string, unknown>> {
  const response = await fetchImpl(url, {
    body: JSON.stringify(body),
    headers,
    method: "POST"
  });

  return await response.json();
}