Discord.js//过滤消息startsWith 并解决bulkDelete 的DiscordAPIError [英] Discord.js // Filtering message startsWith and work around DiscordAPIError for bulkDelete

问题描述

这是我当前的代码.感谢@André Dion 的帮助.

This is my current code. Credit goes to @André Dion for the help.

  if (message.channel.type == 'text') {
    message.channel.fetchMessages().then(messages => {
        const botMessages = messages.filter(msg => msg.author.bot) 
        message.channel.bulkDelete(botMessages);
        messagesDeleted = botMessages.array().length; // number of messages deleted

        // Logging the number of messages deleted on both the channel and console
        message.channel.send("Deletion of messages successful. Total messages deleted: " + messagesDeleted);
        console.log('Deletion of messages successful. Total messages deleted: ' + messagesDeleted)
    }).catch(err => {
        console.log('Error while doing Bulk Delete');
        console.log(err);
    });
}

当用户输入！clearMessages"时，它会运行此代码并仅删除来自机器人的消息.我想添加一个功能，它还可以删除以 !/./> 开头的用户消息(这些消息不仅可以来自用户，也可以来自机器人)，所以我尝试使用 const botMessages 将行编辑为:const botMessages = messages.filter(msg => msg.author.bot && msg.content.startsWith("!" || "." || ">"));不行.你能指出我哪里出错了，我该如何解决这个问题?

When the user enters "!clearMessages" it runs this code and deletes only messages from bots. I would like to add a feature where this also deletes messages from users that starts with !/./> (these messages can be from users not only bots), so I tried editing the line with the const botMessages to this: const botMessages = messages.filter(msg => msg.author.bot && msg.content.startsWith("!" || "." || ">")); but that didn't work. Can you please point out where I'm going wrong and how I can fix this?

我注意到的另一个问题是，当只有 1 条机器人消息时，机器人不会删除该消息并出现 DiscordAPIError，表示您必须提供至少 2-100 条消息才能删除.有解决办法吗?

Another issue I noticed is that when there is only 1 bot message the bot doesn't delete the message and comes up with an DiscordAPIError, saying that you must provide at least 2-100 messages to delete. Is there a work around this?

谢谢.

推荐答案

const botMessages = messages.filter(msg => msg.author.bot && msg.content.startsWith 有两个问题("!" || "." || ">"));:

1. msg.content.startsWith("!" || "." || ">") 只会根据第一个真实的语句进行评估:"！".String#startsWith 只需要一个模式，因此您必须将该调用拆分为三个调用.为方便起见，让我们将这些检查的结果分配给单个变量:

1. msg.content.startsWith("!" || "." || ">") is only going to evaluate against the first truthy statement: "!". String#startsWith only takes a single pattern, so you'll have to split that call into three calls. Let's assign the result of these checks into a single variable for convenience:

const isCommand = msg.content.startsWith("!") || msg.content.startsWith(".") || msg.content.startsWith(">");

您想要过滤掉机器人用户发出的或看起来像命令的消息.当前，您的逻辑已编写，因此机器人发出的消息 和 看起来像命令被过滤，这是错误的(机器人不会发出任何命令).上述添加的正确检查是:

You want to filter out messages that are issued by bot users or that look like a command. Currently your logic is written so that messages that are issued by bots and look like a command are filtered, which is wrong (bots won't be issuing any commands). The correct check with the above additions would be:

const botMessages = messages.filterArray(msg => {
    const isCommand = msg.content.startsWith("!") || msg.content.startsWith(".") || msg.content.startsWith(">");

    return msg.author.bot || isCommand;
});

更正您的过滤器逻辑应该会修复您的 DiscordAPIError 异常，但要确保没有发出错误的调用，您应该保护 bulkDelete 调用:

Correcting your filter logic should fix your DiscordAPIError exception but to ensure no bad calls are being issued, you should guard the bulkDelete invocation:

if (botMessages.length > 1) {
    message.channel.bulkDelete(botMessages);
} else if (botMessages.length) {
    botMessages[0].delete();
} else {
    // nothing to delete
}

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