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

function removeFromBlacklist(req, res) {
  const packageName = req.params.packageName

  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.removePackage(packageName).then(
    removed => {
      if (removed) {
        const userId = req.user.jti
        console.log(
          `Package "${packageName}" was removed from the blacklist by ${userId}`
        )
      }

      res.send({
        ok: true,
        message: `Package "${packageName}" was ${removed
          ? 'removed from'
          : 'not in'} the blacklist`
      })
    },
    error => {
      console.error(error)
      res.status(500).send({
        error: `Unable to remove "${packageName}" from the blacklist`
      })
    }
  )
}

module.exports = removeFromBlacklist