@app.get("/heart/sounds")
async def heart_status():
    last_beat = TimeLog(**serialize_from_document(TimeLogRepository.get_last()))
    if last_beat.is_beating():
        return {
            "isBeating": True,
            "project": last_beat.project_id,
            "since": last_beat.start,
            "so_far": last_beat.duration
        }
    else:
        return {
            "isBeating": False,
            "lastBeatOn": last_beat.project_id,
            "for": last_beat.duration
        }

import pymongo

    @classmethod
    def get_last(cls):
        return cls.table.find_one(sort=[("start", pymongo.DESCENDING)])

    def is_beating(self):
        return not self.end