db/message: restructure message body handling

Instead of allowing the callers to access the email part directly,
introduce a new class for representing the MIME tree structure. All
interaction with the message content should now happen through this
class (some instances of direct access still remain and will be removed
later).

Encrypted/signed parts are now also handled through this structure
rather than using a fragile hack of attaching the decrypted message to
the encrypted one and using fake headers to signal
encryption/signatures.

Message body rendering is now done by walking through the whole MIME
tree and considering all the parts for rendering rather than picking one
specific part.

1 files changed, 3 insertions, 3 deletions

diff --git a/alot/commands/thread.py b/alot/commands/thread.py
index c302aad0..4fdc5c27 100644
--- a/alot/commands/thread.py
+++ b/alot/commands/thread.py
@@ -358,7 +358,7 @@ class ForwardCommand(Command):
 
             envelope.body = mailcontent
 
-            for a in self.message.get_attachments():
+            for a in self.message.iter_attachments():
                 envelope.attach(a)
 
         else:  # attach original mode
@@ -497,7 +497,7 @@ class EditNewCommand(Command):
                 envelope.add(key, value)
 
         # copy attachments
-        for b in self.message.get_attachments():
+        for b in self.message.iter_attachments():
             envelope.attach(b)
 
         await ui.apply_command(ComposeCommand(envelope=envelope,
@@ -822,7 +822,7 @@ class SaveAttachmentCommand(Command):
                                             completer=pcomplete)
             if self.path:
                 if os.path.isdir(os.path.expanduser(self.path)):
-                    for a in msg.get_attachments():
+                    for a in msg.iter_attachments():
                         dest = a.save(self.path)
                         name = a.get_filename()
                         if name: