def update(self, doc, process=None):
        if process is None:
            pk = 'id'
            id = doc.id
            doc.synced = False
            set = doc
        elif process == UPDATE_PROCESS:
            if self.db.docs.find({'sid': doc.sid}).count() == 0:
                return self.insert(doc, synced=True)
            pk = 'sid'
            id = doc.sid
            doc.synced = not doc.merged() # must be commited if was merged
            doc.merged(False)
            set = {'tid': doc.tid, 'data': doc.data, 'user': doc.user,
                   'public': doc.public, 'synced': doc.synced}
        elif process == COMMIT_PROCESS:
            pk = 'id'
            id = doc.id
            doc.synced = True
            set = {'sid': doc.sid, 'tid': doc.tid, 'synced': doc.synced}
        else:
            raise DatabaseException('Incorrect update process')

        try:
            rs = self.db.docs.update({pk: id}, {'$set': set}, safe=True)
            assert rs['n'] == 1
        except Exception as e:
            raise DatabaseException(e)
        return doc
def on_backend_state_changed(self, sender, backend_id):
        """
        Signal callback executed when a backend is enabled/disabled.

        @param sender: not used, only here to let this function be used as a
                       callback
        @param backend_id: the id of the backend to add
        """
        if backend_id in self.backendid_to_iter:
            b_iter = self.backendid_to_iter[backend_id]
            b_path = self.liststore.get_path(b_iter)
            backend = self.req.get_backend(backend_id)
            backend_name = backend.get_human_name()
            if backend.is_enabled():
                text = backend_name
            else:
                # FIXME This snippet is on more than 2 places!!!
                # FIXME create a function which takes a widget and
                # flag and returns color as #RRGGBB
                style_context = self.get_style_context()
                color = style_context.get_color(Gtk.StateFlags.INSENSITIVE)
                color = rgba_to_hex(color)
                text = f"<span color='{color}'>{backend_name}</span>"
            self.liststore[b_path][self.COLUMN_TEXT] = text

            # Also refresh the tags
            new_tags = self._get_markup_for_tags(backend.get_attached_tags())
            self.liststore[b_path][self.COLUMN_TAGS] = new_tags