panel/lib/warden/imap.rb

# frozen_string_literal: true

require 'net/imap'
require 'warden'
require 'email_address'

# XXX Separación de concerns?
require_relative '../sutty/models/usuaria'

module Warden
  module IMAP
    # Una estrategia de autenticación por IMAP
    class Strategy < Warden::Strategies::Base
      def valid?
        return false unless params.include? 'username'
        return false unless params.include? 'password'

        @email = EmailAddress.new(params['username'])

        return false unless @email.valid?

        true
      end

      def authenticate!
        imap_connect
        imap_login
      end

      private

      def imap_connect
        # No vamos a enviar la contraseña en texto plano a ningún lado
        @imap = Net::IMAP.new(@email.host_name, ssl: true)
      # Errores más comunes según
      # https://ruby-doc.org/stdlib-2.0.0/libdoc/net/imap/rdoc/Net/IMAP.html
      rescue Errno::ECONNREFUSED, Errno::ETIMEDOUT, Errno::ENETUNREACH,
             SocketError, Net::IMAP::ByeResponseError => e

        @imap.disconnect
        fail! e.to_s
      end

      def imap_login
        @imap.login(@email.normal, params['password'])
        @imap.disconnect

        success! Sutty::Usuaria.find(@email.normal)
      rescue EOFError => e
        @imap.disconnect
        fail! e.to_s
      end
    end
  end
end

Warden::Strategies.add(:imap, Warden::IMAP::Strategy)