How to use the pmxbot.storage function in pmxbot

def strike(self, channel, nick, count):
        channel = channel.replace('#', '')
        # cap at 19 messages
        count = min(count, 19)
        # get rid of 'the last !strike' too!
        limit = count + 1
        # don't delete anything beyond the past 18 hours
        cutoff = datetime.datetime.utcnow() - datetime.timedelta(hours=18)
        date_limit = storage.bson.objectid.ObjectId.from_datetime(cutoff)
        query = dict(channel=channel, nick=nick, _id={'$gt': date_limit})
        cursor = self.db.find(query).sort('_id', storage.pymongo.DESCENDING)
        cursor = cursor.limit(limit)
        ids_to_delete = [row['_id'] for row in cursor]
        if ids_to_delete:
            self.db.remove({'_id': {'$in': ids_to_delete}})
        rows_deleted = max(len(ids_to_delete) - 1, 0)
        return rows_deleted

def add(self, quote):
        quote = quote.strip()
        quote_id = self.db.insert_one(dict(library=self.lib, text=quote))
        # see if the quote added is in the last IRC message logged
        newest_first = [('_id', storage.pymongo.DESCENDING)]
        last_message = self.db.database.logs.find_one(sort=newest_first)
        if last_message and quote in last_message['message']:
            self.db.update_one(
                {'_id': quote_id}, {'$set': dict(log_id=last_message['_id'])}
            )