找到对不一致反应时保存图像的功能 [英] find the function that save an image when react to on discord

问题描述

我不熟悉构建不和谐的机器人。

I am new to building discord bots.

所以我创建了一个机器人，设法让他说话等（我使用Python 3.6）

So I created a bot, manage to make him talk etc. (I use Python 3.6)

我现在正在尝试从频道复制图像以将其发送到其他地方。
我找不到用于检查是否对图像作出反应的函数，也没有人来保存图像。

I am now trying to copy an image from a channel to send it somewhere else. I can't find the function that checks if I reacted to the image neither the one to save an image.

我要执行的操作是：如果有人对带有：white_check_mark：的图像做出反应，则机器人会将其复制。

What i want to do is : If an someone reacts to an image with the :white_check_mark: , the bot copies it.

如果有人已经做过并且可以向我展示，那就太棒了。

If someone already did it and can show it to me would be awesome.

非常感谢。

推荐答案

图像可以通过两种方式出现在消息中。它可能是该消息的附件，您可以在其中将图像从计算机上载到Discord，也可以是在嵌入中，这是将链接粘贴到Discord中时发生的情况。

There are two ways an image could be in a message. It could be an attachment to that message, where you upload an image from your computer to Discord, or it could be in an embed, which is what happens when you paste a link in Discord.

用户对消息而不是图像做出反应。每当用户对您的漫游器知道的消息做出反应时，它都会触发 on_reaction_add 事件。我们可以在该事件中放入代码以检查是否有反应，然后保存文件。

Users react to messages, not images. Whenever a user reacts to a message your bot is aware of, it triggers the on_reaction_add event. We can put code in that event to check for a certain reaction and then save the files.

@bot.event
async def on_reaction_add(reaction, user):
    if reaction.emoji == '\N{WHITE HEAVY CHECK MARK}':
        for embed in reaction.message.embeds:
            if embed.url is not discord.Embed.Empty:
                url = embed.url
                name = url[url.rfind('/')+1:]
                async with aiohttp.ClientSession() as session:
                    async with session.get(url) as resp:
                        if resp.status == 200:
                            with open(f'imgs/{name}', 'wb+') as file:
                                file.write(await resp.read())
        for attachment in reaction.message.attachments:
            await attachment.save(f'imgs/{attachment.filename}')

我是为最近的重写分支1.0版编写的。如果您使用的是较旧的异步分支0.16，则需要更改附件保存的工作方式。我相信旧版本中的附件存储为字典，而不是附件对象。

I wrote this for the more recent rewrite branch, version 1.0. If you're using the older async branch, 0.16, then you will need to change how attachment saving works. I believe that attachments in the older versions were stored as dictionaries, rather than as attachment objects.

请记住 on_reaction_add 仅针对您的漫游器已缓存的消息运行。对较旧消息的反应不会触发该事件。

Keep in mind that on_reaction_add is only run for messages that your bot has cached. Reactions on older messages won't trigger the event.

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