@theguild/components/dist/server/npm.js

import semver from "semver";
const cache = {};
function withoutStartingSlash(v) {
  if (v === "/") return v;
  if (v.startsWith("/")) return v.slice(1, v.length);
  return v;
}
function withoutTrailingSlash(v) {
  if (v === "/") return v;
  if (v.endsWith("/")) return v.slice(0, v.length - 1);
  return v;
}
function withStartingSlash(v) {
  if (v.startsWith("/")) return v;
  return `/${v}`;
}
async function tryRemoteReadme(repo, path) {
  const fetchPath = `https://raw.githubusercontent.com/${withoutStartingSlash(
    withoutTrailingSlash(repo)
  )}/HEAD${withStartingSlash(path)}`;
  try {
    const response = await fetch(fetchPath, {
      method: "GET"
    });
    if (response.status === 404) {
      console.error(`ERROR | ${fetchPath} Not Found`);
    }
    return await response.text();
  } catch (err) {
    console.error(
      `[@theguild/components] ERROR | Error while trying to get README from GitHub ${fetchPath}`
    );
    console.error(err);
    return null;
  }
}
const NO_NPM_README_PLACEHOLDER = "ERROR: No README data found!";
const fetchPackageInfo = async (packageName, githubReadme) => {
  const cacheKey = githubReadme ? `${githubReadme.repo}${githubReadme.path}` : packageName;
  const cachedData = cache[cacheKey];
  if (cachedData) {
    return cachedData;
  }
  const encodedName = encodeURIComponent(packageName);
  console.debug(`Loading NPM package info: ${packageName}`);
  const [packageInfo, { downloads }] = await Promise.all([
    fetch(`https://registry.npmjs.org/${encodedName}`).then((response) => response.json()),
    fetch(`https://api.npmjs.org/downloads/point/last-week/${encodedName}`).then(
      (response) => response.json()
    )
  ]);
  const { readme, time, description } = packageInfo;
  const latestVersion = packageInfo["dist-tags"].latest;
  const readmeContent = githubReadme && await tryRemoteReadme(githubReadme.repo, githubReadme.path);
  cache[cacheKey] = {
    readme: readmeContent || readme !== NO_NPM_README_PLACEHOLDER && readme || // for some reason top level "readme" can be empty string, so we get the latest version readme
    Object.values(packageInfo.versions).reverse().find((curr) => {
      const isReadmeExist = curr.readme && curr.readme !== NO_NPM_README_PLACEHOLDER;
      if (isReadmeExist) {
        return semver.lte(curr.version, latestVersion);
      }
    })?.readme || "",
    createdAt: time.created,
    updatedAt: time.modified,
    description,
    weeklyNPMDownloads: downloads
  };
  return cache[cacheKey];
};
export {
  fetchPackageInfo,
  withStartingSlash,
  withoutStartingSlash,
  withoutTrailingSlash
};