带有反应 Discord.Py 的背景循环

Question

我有一个后台循环，每隔 X 分钟会吐出一个表情符号，并附有一个反应。我希望当有人按下消息的反应时，它会删除该消息，然后发送另一条消息说“消息作者已经抓住了战利品”，然后将金额添加到现金 json 文件中。

现在，我的代码正在使后台循环工作，但我不确定如何获取关于后台循环的 message.author.id，以便我可以在 on_reaction_add 中引用它。当前代码使机器人在吐出后台循环时做出反应，然后在 on_reaction_add 中再次做出反应。我试图让它等待用户使用相同的表情符号而不是机器人对后台循环消息做出反应。

client = discord.Client()
emoji_msg_grab = {}


try:
    with open("cash.json") as fp:
        cash = json.load(fp)
except Exception:
    cash = {}

def save_cash():
    with open("cash.json", "w+") as fp:
        json.dump(cash, fp, sort_keys=True, indent=4)

def add_dollars(user: discord.User, dollars: int):
    id = user.id
    if id not in cash:
        cash[id] = {}
    cash[id]["dollars"] = cash[id].get("dollars", 0) + dollars
    print("{} now has {} dollars".format(user.name, cash[id]["dollars"]))
    save_cash()


async def background_loop():
    await client.wait_until_ready()
    while not client.is_closed:
        channel = client.get_channel("479919577279758340")
        emojigrab = '????'
        emojimsgid = await client.send_message(channel, emojigrab)
        await client.add_reaction(emojimsgid, "????")
        user_id = emojimsgid.author.id
        emoji_msg_grab[user_id] = {"emoji_msg_id": emojimsgid.id, "emoji_user_id": user_id}
        await asyncio.sleep(600)

@client.event
async def on_reaction_add(reaction, user):
    msgid = reaction.message.id
    chat = reaction.message.channel

    if reaction.emoji == "????" and msgid == emoji_msg_grab[user.id]["emoji_msg_id"] and user.id == emoji_msg_grab[user.id]["emoji_user_id"]:
        emoji_msg_grab[user.id]["emoji_msg_id"] = None
        await client.send_message(chat, "{} has grabbed the loot!".format(user.mention))
        await client.delete_message(reaction.message)
        add_dollars(user, 250)

client.loop.create_task(background_loop())

Answer 1

我会使用Client.wait_for_reaction 而不是on_reaction_add：

async def background_loop():
    await client.wait_until_ready()
    channel = client.get_channel("479919577279758340")
    while not client.is_closed:
        emojigrab = '?'
        emojimsg = await client.send_message(channel, emojigrab)
        await client.add_reaction(emojimsg, "?")
        res = await client.wait_for_reaction(emoji="?", message=emojimsg, timeout=600, 
                                             check=lambda reaction, user: user != client.user)
        if res:  # not None
            await client.delete_message(emojimsg)
            await client.send_message(channel, "{} has grabbed the loot!".format(res.user.mention))
            await asyncio.sleep(1)
            add_dollars(res.user, 250)