module Users
  # Helpers for Users
  module Helpers
    # Checks fs type.
    #
    # @return [String]
    def fs_type(mount)
      # Doesn't support macosx
      stat = Mixlib::ShellOut.new("stat -f -L -c %T #{mount} 2>&1").run_command
      stat.stdout.chomp
    rescue
      'none'
    end

    # Determines if provided mount point is remote.
    #
    # @return [Boolean]
    def fs_remote?(mount)
      fs_type(mount) == 'nfs' ? true : false
    end

    def keys_from_url(url)
      host = url.split('/')[0..2].join('/')
      path = url.split('/')[3..-1].join('/')
      begin
        response = Chef::HTTP.new(host).get(path)
        response.split("\n")
      rescue Net::HTTPServerException => e
        p "request: #{host}#{path}, error: #{e}"
      end
    end

    # Determines if the user's shell is valid on the machine, otherwise
    # returns the default of /bin/sh
    #
    # @return [String]
    def shell_is_valid?(shell_path)
      return false if shell_path.nil? || !File.exist?(shell_path)
      # AIX is the only OS that has the concept of 'approved shells'
      return true unless platform_family?('aix')

      begin
        File.open('/etc/security/login.cfg') do |f|
          f.each_line do |l|
            l.match(/^\s*shells\s*=\s*(.*)/) do |m|
              return true if m[1].split(/\s*,\s*/).any? { |entry| entry.eql? shell_path }
            end
          end
        end
      rescue
        return false
      end

      false
    end

    # Validates passed id.
    #
    # @return [Numeric, String]
    # handles checking whether uid was specified as a string
    def validate_id(id)
      id.to_i.to_s == id ? id.to_i : id
    end

    # Returns the appropriate base user home directory per platform
    #
    # @return [ String]
    def home_basedir
      if platform_family?('mac_os_x')
        '/Users'
      elsif platform_family?('solaris2')
        '/export/home'
      else
        '/home'
      end
    end
  end
end