From eef2d7d1521c88b689794a0bceedc40e93711a3e Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Thu, 13 May 2021 10:12:48 +0200
Subject: commands/thread:ReplyCommand: use the message headers object for
 building reply

---
 alot/commands/thread.py | 23 ++++++++++++-----------
 alot/db/message.py      |  7 +++++++
 2 files changed, 19 insertions(+), 11 deletions(-)

diff --git a/alot/commands/thread.py b/alot/commands/thread.py
index 06cc6666..7d2180a6 100644
--- a/alot/commands/thread.py
+++ b/alot/commands/thread.py
@@ -208,13 +208,13 @@ class ReplyCommand(Command):
         envelope.account = account
 
         # set To
-        sender = mail['Reply-To'] or mail['From']
+        sender = message.headers.get('Reply-To') or message.headers.get('From') or ''
         sender_address = parseaddr(sender)[1]
         cc = []
 
         # check if reply is to self sent message
         if account.matches_address(sender_address):
-            recipients = mail.get_all('To', [])
+            recipients = message.headers.get_all('To')
             emsg = 'Replying to own message, set recipients to: %s' \
                 % recipients
             logging.debug(emsg)
@@ -224,25 +224,25 @@ class ReplyCommand(Command):
         if self.groupreply:
             # make sure that our own address is not included
             # if the message was self-sent, then our address is not included
-            MFT = mail.get_all('Mail-Followup-To', [])
+            MFT = message.headers.get_all('Mail-Followup-To')
             followupto = clear_my_address(account, MFT)
             if followupto and settings.get('honor_followup_to'):
                 logging.debug('honor followup to: %s', ', '.join(followupto))
                 recipients = followupto
                 # since Mail-Followup-To was set, ignore the Cc header
             else:
-                if sender != mail['From']:
-                    recipients.append(mail['From'])
+                if sender != message.headers.get('From'):
+                    recipients.append(message.headers.get('From'))
 
                 # append To addresses if not replying to self sent message
                 if not account.matches_address(sender_address):
                     cleared = clear_my_address(account,
-                                               mail.get_all('To', []))
+                                               message.headers.get_all('To'))
                     recipients.extend(cleared)
 
                 # copy cc for group-replies
-                if 'Cc' in mail:
-                    cc = clear_my_address(account, mail.get_all('Cc', []))
+                if 'Cc' in message.headers:
+                    cc = clear_my_address(account, message.headers.get_all('Cc'))
                     envelope.add('Cc', ', '.join(cc))
 
         to = ', '.join(ensure_unique_address(recipients))
@@ -253,12 +253,13 @@ class ReplyCommand(Command):
             # Reply-To is standart reply target RFC 2822:, RFC 1036: 2.2.1
             # X-BeenThere is needed by sourceforge ML also winehq
             # X-Mailing-List is also standart and is used by git-send-mail
-            to = mail['Reply-To'] or mail['X-BeenThere'] or mail['X-Mailing-List']
+            to = message.headers.get('Reply-To') or message.headers.get('X-BeenThere') or \
+                 message.headers.get('X-Mailing-List')
 
             # Some mail server (gmail) will not resend you own mail, so you
             # have to deal with the one in sent
             if to is None:
-                to = mail['To']
+                to = message.headers['To']
             logging.debug('mail list reply to: %s', to)
             # Cleaning the 'To' in this case
             if envelope.get('To') is not None:
@@ -283,7 +284,7 @@ class ReplyCommand(Command):
         envelope.add('In-Reply-To', '<%s>' % message.id)
 
         # set References header
-        old_references = mail.get('References', '')
+        old_references = message.headers.get('References')
         if old_references:
             old_references = old_references.split()
             references = old_references[-8:]
diff --git a/alot/db/message.py b/alot/db/message.py
index d849c91b..df6f8b1c 100644
--- a/alot/db/message.py
+++ b/alot/db/message.py
@@ -74,6 +74,13 @@ class _MessageHeaders:
         """
         return self._msg.get(key)
 
+    def get_all(self, key):
+        """
+        Get the list of all values of the header with the name equal to key,
+        empty list of the header is not present.
+        """
+        return self._msg.get_all(key, [])
+
     def keys(self):
         return self._msg.keys()
 
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