Discord.js//过滤消息startsWith并解决DiscordAPIError的bulkDelete问题

问题描述

这是我当前的代码.感谢@AndréDion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，它将运行此代码并仅从漫游器中删除消息.我想添加一个功能，该功能还可以删除以！/./>开头的用户的消息(这些消息不仅可以来自机器人，而且可以来自用户)，因此我尝试使用const botMessages将此行编辑为:const botMessages = messages.filter(msg => msg.author.bot && msg.content.startsWith("!" || "." || ">"));但这没用.您能否指出我要去哪里以及如何解决此问题?

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bot消息时，该bot不会删除该消息，并带有DiscordAPIError，表示必须至少提供2-100条消息才能删除.有没有解决的办法?

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("!" || "." || ">")仅将根据第一个真实陈述:"!"进行评估. String#startsWith 仅需单一模式，因此您必须将该通话分为三个通话.为了方便起见，让我们将这些检查的结果分配到单个变量中:

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(">");

您要过滤出由机器人用户发出的或看起来像命令的消息.当前，您的逻辑是这样编写的，以使由机器人和发出的消息看起来像一条命令都被过滤掉了，这是错误的(机器人不会发出任何命令).上面添加的正确检查将是:

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;
});

更正过滤器逻辑应该可以解决DiscordAPIError异常，但是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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