[fix] attachments handling

mms2mail

@@ -29,6 +29,7 @@ import re
 import time
 import getpass
 import socket
+import mimetypes
 from pathlib import Path
 
 from messaging.mms.message import MMSMessage
@@ -183,20 +184,24 @@ class MMS2Mail:
             message.headers.append((f"X-MMS-{header}",
                                     f"{mms.headers[header]}"))
 
+        message.plain = " "
+        data_id = 1
         for data_part in mms.data_parts:
             datacontent = data_part.headers['Content-Type']
             if datacontent is not None:
                 if 'text/plain' in datacontent[0]:
-                    message.plain = f"{data_part.data} \n"
-                if 'Name' in datacontent[1]:
-                    filename = datacontent[1]['Name']
-                    message.attach(filename, data_part.data)
-        # Ensure a proper body content in the resulting mail
-        if not message.plain:
-            message.plain = " "
+                    encoding = datacontent[1].get('Charset', 'utf-8')
+                    plain = data_part.data.decode(encoding)
+                    message.plain += plain + '\n'
+                    continue
+                extension = mimetypes.guess_extension(datacontent[0])
+                filename = datacontent[1].get('Name', str(data_id))
+                message.attach(filename + extension, data_part.data)
+                data_id = data_id + 1
+
         # Add MMS binary file, for debugging purpose or reparsing in the future
         if self.attach_mms:
-            message.attach(path, None, None, None, False, "mms.bin")
+            message.attach(path, None, None, None, False, path.split('/')[-1])
 
         # Creating an empty file stating the mms as been converted
         self.mark_mms_read(dbus_path)