From aada00a87b4750f4c15fd679c1cb199dd7b6abe4 Mon Sep 17 00:00:00 2001
From: nick evans <nicholas.evans@gmail.com>
Date: Wed, 27 Sep 2023 21:34:48 -0400
Subject: [PATCH] WIP

---
 lib/net/smtp/auth_net_imap_adapter.rb | 49 +++++++--------------------
 1 file changed, 13 insertions(+), 36 deletions(-)

diff --git a/lib/net/smtp/auth_net_imap_adapter.rb b/lib/net/smtp/auth_net_imap_adapter.rb
index c1bc57f..ad2772b 100644
--- a/lib/net/smtp/auth_net_imap_adapter.rb
+++ b/lib/net/smtp/auth_net_imap_adapter.rb
@@ -8,6 +8,15 @@ class Authenticator
       #
       # Initialize with a block that runs a command, yielding for continuations.
       class SASLAdapter < SASL::ClientAdapter
+        COMMAND_NAME = "AUTH"
+        RESPONSE_ERRORS = [
+          SMTPAuthenticationError,
+          SMTPServerBusy,
+          SMTPSyntaxError,
+          SMTPFatalError,
+          SMTPUnsupportedCommand
+        ].freeze
+
         def self.authenticate(client, mechanism, *args, **kwargs, &block)
           sasl = SASL.authenticator(mechanism, *args, **kwargs, &block)
           adapter = new(client, mechanism, sasl)
@@ -17,45 +26,13 @@ def self.authenticate(client, mechanism, *args, **kwargs, &block)
         def initialize(...)
           super
           @send_command_proc ||= client
-             .method(:send_command_yielding_continuations)
-        end
-
-        def server_supports_initial_response?; true end
-        def server_supports_mechanism?
-          client.__send__(:auth_capable?, mechanism)
+            .method(:send_command_yielding_continuations)
         end
 
-        def auth_command_args(initial_response = nil)
-          ["AUTH", mechanism, initial_response].compact
-        end
+        def supports_initial_response?; true end
 
-        # Logs out for any error, except for SMTP failure codes.
-        def around_authenticate
-          res = yield
-        rescue SASL::AuthenticationFailed => ex
-          # The server failed authentication.
-          if res
-            raise res.exception_class.new(res)
-          else
-            raise ex
-          end
-        rescue SMTPAuthenticationError,
-               SMTPServerBusy,
-               SMTPSyntaxError,
-               SMTPFatalError,
-               SMTPUnsupportedCommand
-          # An error occurred, but the connection should be okay to try again.
-          raise
-        rescue
-          # Either:
-          # * The server says we're OK without completing the exchange.
-          # * The server sent invalid challenges.
-          # * The server failed to authenticate itself to us.
-          # * An unknown and unhandled error occurred.
-          #
-          # The connection may not be safe to continue using.
-          client.finish
-          raise
+        def supports_mechanism?
+          client.__send__(:auth_capable?, mechanism)
         end
 
         def handle_incomplete(res)