[refactor] Move all dbus action in a specific class

mms2mail

@@ -81,51 +81,16 @@ class MMS2Mail:
         mbox_file = self.config.get('mail', 'mailbox',
                                     fallback=f"/var/mail/{self.user}")
         self.mailbox = mailbox.mbox(mbox_file)
-        if self.disable_dbus:
-            return
-        dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
-        self.bus = dbus.SessionBus()
+        self.dbus = None
 
-    def get_bus(self):
+    def set_dbus(self, dbusmmsd):
         """
         Return the DBus SessionBus.
 
-        :rtype dbus.SessionBus()
-        :return: an active SessionBus
-        """
-        if self.disable_dbus:
-            return None
-        return self.bus
-
-    def mark_mms_read(self, dbus_path):
-        """
-        Ask mmsd to mark the mms as read.
-
-        :param dbus_path: the mms dbus path
-        :type dbus_path: str
-        """
-        if self.disable_dbus:
-            return None
-        message = dbus.Interface(self.bus.get_object('org.ofono.mms',
-                                                     dbus_path),
-                                 'org.ofono.mms.Message')
-        log.debug(f"Marking MMS as read {dbus_path}")
-        message.MarkRead()
-
-    def delete_mms(self, dbus_path):
+        :param dbusmmsd: The DBus MMSd abstraction class
+        :type dbusmmsd: DbusMMSd()
         """
-        Ask mmsd to delete the mms.
-
-        :param dbus_path: the mms dbus path
-        :type dbus_path: str
-        """
-        if self.disable_dbus:
-            return None
-        message = dbus.Interface(self.bus.get_object('org.ofono.mms',
-                                                     dbus_path),
-                                 'org.ofono.mms.Message')
-        log.debug(f"Deleting MMS {dbus_path}")
-        message.Delete()
+        self.dbus = dbusmmsd
 
     def check_mms(self, path):
         """
@@ -155,6 +120,14 @@ class MMS2Mail:
             return False
         return True
 
+    def message_added(self, name, value, member, path, interface):
+        """Trigger conversion on MessageAdded signal."""
+        if value['Status'] == 'downloaded' or value['Status'] == 'received':
+            log.debug(f"New incoming MMS found ({name.split('/')[-1]})")
+            self.convert(value['Attachments'][0][2], name)
+        else:
+            log.debug(f"New outgoing MMS found ({name.split('/')[-1]})")
+
     def convert(self, path, dbus_path=None):
         """
         Convert a provided mms file to a mail stored in a mbox.
@@ -257,15 +230,17 @@ class MMS2Mail:
                     time.sleep(5)
 
         # Ask mmsd to mark message as read and delete it
-        self.mark_mms_read(dbus_path)
+        if self.disable_dbus:
+            return
+        self.dbus.mark_mms_read(dbus_path)
         if self.delete:
-            self.delete_mms(dbus_path)
+            self.dbus.delete_mms(dbus_path)
 
 
-class DbusWatcher():
-    """Use DBus Signal notification to watch for new MMS."""
+class DbusMMSd():
+    """Use DBus communication with mmsd."""
 
-    def __init__(self, mms2mail):
+    def __init__(self, mms2mail=None):
         """
         Return a DBusWatcher instance.
 
@@ -273,16 +248,61 @@ class DbusWatcher():
         :type mms2mail: mms2mail()
         """
         self.mms2mail = mms2mail
+        dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
+        self.bus = dbus.SessionBus()
+
+    def set_mms2mail(self, mms2mail):
+        """
+        Set mms2mail instance handling dbus event.
+
+        :param mms2mail: An mms2mail instance to convert new mms
+        :type mms2mail: mms2mail()
+        """
+        self.mms2mail = mms2mail
+
+    def mark_mms_read(self, dbus_path):
+        """
+        Ask mmsd to mark the mms as read.
+
+        :param dbus_path: the mms dbus path
+        :type dbus_path: str
+        """
+        message = dbus.Interface(self.bus.get_object('org.ofono.mms',
+                                                     dbus_path),
+                                 'org.ofono.mms.Message')
+        log.debug(f"Marking MMS as read {dbus_path}")
+        message.MarkRead()
+
+    def delete_mms(self, dbus_path):
+        """
+        Ask mmsd to delete the mms.
+
+        :param dbus_path: the mms dbus path
+        :type dbus_path: str
+        """
+        if self.disable_dbus:
+            return None
+        message = dbus.Interface(self.bus.get_object('org.ofono.mms',
+                                                     dbus_path),
+                                 'org.ofono.mms.Message')
+        log.debug(f"Deleting MMS {dbus_path}")
+        message.Delete()
+
+    def add_signal_receiver(self):
+        """Add a signal receiver to the current bus."""
+        if self.mms2mail:
+            self.bus.add_signal_receiver(self.mms2mail.message_added,
+                                         bus_name="org.ofono.mms",
+                                         signal_name="MessageAdded",
+                                         member_keyword="member",
+                                         path_keyword="path",
+                                         interface_keyword="interface")
+            return True
+        else:
+            return False
 
     def run(self):
-        """Run the watcher mainloop."""
-        bus = self.mms2mail.get_bus()
-        bus.add_signal_receiver(self.message_added,
-                                bus_name="org.ofono.mms",
-                                signal_name="MessageAdded",
-                                member_keyword="member",
-                                path_keyword="path",
-                                interface_keyword="interface")
+        """Run the dbus mainloop."""
         mainloop = GLib.MainLoop()
         log.info("Starting DBus watcher mainloop")
         try:
@@ -291,14 +311,6 @@ class DbusWatcher():
             log.info("Stopping DBus watcher mainloop")
             mainloop.quit()
 
-    def message_added(self, name, value, member, path, interface):
-        """Trigger conversion on MessageAdded signal."""
-        if value['Status'] == 'downloaded' or value['Status'] == 'received':
-            log.debug(f"New incoming MMS found ({name.split('/')[-1]})")
-            self.mms2mail.convert(value['Attachments'][0][2], name)
-        else:
-            log.debug(f"New outgoing MMS found ({name.split('/')[-1]})")
-
 
 def main():
     """Run the different functions handling mms and mail."""
@@ -324,18 +336,21 @@ def main():
                                                    after a few minutes /!\\")
     args = parser.parse_args()
 
+    d = DbusMMSd()
     m = MMS2Mail(args.delete, args.force_read,
                  args.disable_dbus, args.force_unlock)
+    m.set_dbus(d)
 
     if args.files:
         for mms_file in args.files:
             m.convert(mms_file)
     elif args.watcher:
         log.info("Starting mms2mail in daemon mode")
-        w = DbusWatcher(m)
-        w.run()
+        d.set_mms2mail(m)
+        d.add_signal_receiver()
     else:
         parser.print_help()
+    d.run()
 
 
 if __name__ == '__main__':