class NpmPackage

def info
  return @info if defined?(@info)
  cmd = inspec.command("npm ls -g --json #{@package_name}")
  @info = {
    name: @package_name,
    type: 'npm',
    installed: cmd.exit_status == 0,
  }
  return @info unless @info[:installed]
  pkgs = JSON.parse(cmd.stdout)
  @info[:version] = pkgs['dependencies'][@package_name]['version']
  @info
end

def initialize(package_name)
  @package_name = package_name
  @cache = nil
end

def installed?
  info[:installed] == true
end

def to_s
  "Npm Package #{@package_name}"
end

def version
  info[:version]
end