import { urljoin } from "$lib/util.js";

class Doc {
  // join given path and queries with a document server URL
  join(path = null, query = {}) {
    return urljoin(import.meta.env.WEBSITE_DOC_URL, path, query);
  }

  // check JSON response and throw an error if it contains one
  check_err(json) {
    if ("error" in json)
      throw new Error(`Doc server returned an error: ${json["error"]}`);
  }

  // send a HTTP request to the documentation server
  async GET(fetch, url) {
    const res = await fetch(url);
    const json = await res.json();
    this.check_err(json);
    return json;
  }

  // get a list of all the documentations
  async list(fetch) {
    return await this.GET(fetch, this.join("/list"));
  }

  // get a documentation
  async get(fetch, name) {
    let url = this.join(`/get/${name}`);
    return await this.GET(fetch, url);
  }
}

const doc = new Doc();
export default doc;