j-mendez/dfirestore

import { config } from "./config.ts";
import type { ListParams, FetchRequest, FireResponse } from "./types.ts";

const extractParams = ({
  pageSize,
  pageToken,
  orderBy,
  mask,
  showMissing,
}: Partial<FetchRequest>): ListParams => {
  const size = pageSize ? `?pageSize=${Number(pageSize)}` : "";
  const page = pageToken ? `${size ? "&" : "?"}pageToken=${pageToken}` : "";
  const order = orderBy ? `${size || page ? "&" : "?"}orderBy=${orderBy}` : "";
  const missing = showMissing
    ? `${size || page || order ? "&" : "?"}showMissing=${showMissing}`
    : "";
  const fields = mask
    ? `${size || page || order || missing ? "&" : "?"}mask=${JSON.stringify(
        mask
      )}`
    : "";

  return {
    size,
    page,
    order,
    missing,
    fields,
  };
};

const client = {
  request: async (params: FetchRequest): Promise<FireResponse> => {
    const requestHeaders: HeadersInit = new Headers();

    requestHeaders.set("Content-Type", "application/json");

    const token = params?.authorization ?? config.token;

    if (token) {
      requestHeaders.set("Authorization", `Bearer ${token}`);
    }

    const { size, page, order, missing, fields } = extractParams(params);

    const req = await fetch(
      `${config.host(params?.project)}/databases/${
        params?.database ?? config.firebaseDb
      }/${params.url}${size}${page}${order}${missing}${fields}`,
      {
        method: params.method ?? "POST",
        body: params?.reqBody && JSON.stringify(params.reqBody),
        headers: requestHeaders,
      }
    );

    return await req.json();
  },
};

export { client };