from beets.plugins import BeetsPlugin

class RetagPlugin(BeetsPlugin):

    def __init__(self):
        super(RetagPlugin, self).__init__()
        self.config.add({
            'clear': [ 'mb_trackid', 'mb_albumid', 'acoustid_id', 'acoustid_fingerprint' ]
        })
        self.register_listener('import_task_start', self.clear_tags)

    @property
    def cleared_props(self):
        return self.config['clear'].as_str_seq()

    def clear_tags(self, session, task):
        for item in task.items:
            for prop in self.cleared_props:
                item[prop] = None