const validateNpmPackageName = require("validate-npm-package-name");
const BlacklistAPI = require("../BlacklistAPI");

function addToBlacklist(req, res) {
  const packageName = req.body.packageName;

  if (!packageName) {
    return res
      .status(403)
      .send({ error: 'Missing "packageName" body parameter' });
  }

  const nameErrors = validateNpmPackageName(packageName).errors;

  // Disallow invalid package names.
  if (nameErrors) {
    const reason = nameErrors.join(", ");
    return res.status(403).send({
      error: `Invalid package name "${packageName}" (${reason})`
    });
  }

  BlacklistAPI.addPackage(packageName).then(
    added => {
      if (added) {
        const userId = req.user.jti;
        console.log(
          `Package "${packageName}" was added to the blacklist by ${userId}`
        );
      }

      res.set({ "Content-Location": `/_blacklist/${packageName}` }).send({
        ok: true,
        message: `Package "${packageName}" was ${
          added ? "added to" : "already in"
        } the blacklist`
      });
    },
    error => {
      console.error(error);
      res.status(500).send({
        error: `Unable to add "${packageName}" to the blacklist`
      });
    }
  );
}

module.exports = addToBlacklist;