Musicbrainz client

musicbrainz_client.js

async function fetchJson(url) {
  const response = await fetch(url);
  if (!response.ok) {
    throw new Error(
      `GET ${url} ${response.status} - ${response.statusText} `,
    );
  }

  return response.json();
}

function mapReleaseGroups(groups) {
  return groups.map((group) => {
    return {
      id: group.id,
      title: group.title,
    };
  });
}

function findWikidataResource(relations) {
  let wikiRelation = relations.find((rel) => rel.type === "wikidata");
  return wikiRelation?.url?.resource;
}

export async function getArtist(id) {
  if (!id) {
    throw Error("No id specified");
  }

  const url = new URL(`http://musicbrainz.org/ws/2/artist/${id}`);
  url.searchParams.set("fmt", "json");
  url.searchParams.set("inc", "url-rels+release-groups");

  const data = await fetchJson(url);

  return {
    name: data.name,
    albums: mapReleaseGroups(data["release-groups"]),
    wikidataKey: findWikidataResource(data.relations),
  };
}