添加对特定消息的反应 Discord.JS

Question

我正在尝试创建一个命令来添加对特定消息的反应。

命令是：/react "Channel-ID" "Message-ID" "Emoji"

但是在运行命令时出现此错误：

(node:4) UnhandledPromiseRejectionWarning: DiscordAPIError: Invalid 表单正文：channel_id：值“845345565700128788 <:xplane11:845383490286518322>" 不是雪花。

有什么简单的方法可以解决这个问题吗？

谢谢

client.on("message", message => {
        if (message.author.bot) return;
    
        let messageArray = message.content.split(" ");
        let command = messageArray[0];
        let channelid = messageArray.slice(1);
        let messageid = messageArray.slice(2);
        let emoji = messageArray.slice(3);
    
        if (message.channel.type === "dm") return;
    
        if (!message.content.startsWith('/')) return;
    
           if (command === '/react') {
    
            let memberrole = message.member.roles.cache.find(role => role.name === "CEO");
            if (!memberrole) return message.channel.send('Insufficiant Perms');
            
            message.client.channels.fetch(channelid.slice(1).join(" ")).then(channel => {
                channel.messages.fetch(messageid.slice(2).join(" ")).then(message => {
                    message.react(emoji.slice(3).join(" "));
                })
            })
          }});

对于任何想知道的人，这是有效的代码：

client.on('message', async (message) => {
    if (
      message.author.bot ||
      message.channel.type === 'dm' ||
      !message.content.startsWith(prefix)
    )
      return;
    
    const args = message.content.slice(prefix.length).split(/ +/);

    const command = args.shift().toLowerCase();
  
    if (command === 'react') {

      const [channelId, messageId, emoji] = args;
  

      if (!channelId)
        return message.channel.send(`You need to provide a channel ID`);

      const memberrole = message.member.roles.cache.find((role) => role.name === 'CEO');
      if (!memberrole) return message.channel.send('Insufficiant perms');
  
      try {
        const channel = await message.client.channels.fetch(channelId);
        if (!channel)
          return message.channel.send(`No channel found with the ID ${channelId}`);
  
        const msg = await channel.messages.fetch(messageId);
        if (!msg)
          return message.channel.send(`No message found with the ID ${messageId}`);
  
        msg.react(emoji);
      } catch (error) {
        console.log(error);
        message.channel.send('Oh-oh, there was an error...');
      }
    }
  });

Answer 1

问题是您错误地使用了Array#slice()。 Array#slice() 将数组的一部分的浅拷贝返回到新数组中。当您使用messageArray.slice(1) 时，实际上是通过删除命令messageArray 的第一个元素来创建一个新数组。对于messageid，您将删除messageArray 的前两个元素，留下消息ID 和表情符号。看看下面的sn-p。如果你运行它，你可以看到每个变量的值：

const message = { content: '/react 845345565700128700 845345565700128788 <:XPLANE11:845383490286518322>' }
let messageArray = message.content.split(' ');
let command = messageArray[0];
let channelid = messageArray.slice(1);
let messageid = messageArray.slice(2);
let emoji = messageArray.slice(3);

console.log({ command, channelid, messageid, emoji })

所以，此时，channelid 是一个由三个元素组成的数组；频道 ID、消息 ID 和表情符号。在 channels.fetch() 方法中，您再次创建一个新数组，方法是将第一个元素切掉，然后将 join 剩下的元素切掉一个空格。所以，它变成了845345565700128788 <:XPLANE11:845383490286518322>。查看下面的 sn-p：

// messageArray.slice(1);
const channelid = [
  '845345565700128700',
  '845345565700128788',
  '<:XPLANE11:845383490286518322>',
]

console.log(channelid.slice(1).join(' '))

如果您检查您尝试获取的值，它正是您的错误消息中的值，Value "845345565700128788 <:XPLANE11:845383490286518322>" is not snowflake。这不是一个有效的雪花。它实际上是单个字符串中的消息 ID 和表情符号。

要解决这个问题，您可以简单地将messageArray 的第二个元素作为channelid，将第三个元素作为messageid，等等：

let messageArray = message.content.split(' ');
let command = messageArray[0];
let channelid = messageArray[1];
let messageid = messageArray[2];
let emoji = messageArray[3];

您也可以使用数组解构来获得相同的效果：

let messageArray = message.content.split(' ');
let [command, channelid, messageid, emoji] = messageArray;

这是完整的代码：

// use a prefix variable
const prefix = '/';

client.on('message', async (message) => {
  if (
    message.author.bot ||
    message.channel.type === 'dm' ||
    !message.content.startsWith(prefix)
  )
    return;

  // create an args variable that slices off the prefix and splits it into an array
  const args = message.content.slice(prefix.length).split(/ +/);
  // create a command variable by taking the first element in the array
  // and removing it from args
  const command = args.shift().toLowerCase();

  if (command === 'react') {
    // destructure args
    const [channelId, messageId, emoji] = args;

    // check if there is channelId, messageId, and emoji provided
    // if not, send an error message
    if (!channelId)
      return message.channel.send(`You need to provide a channel ID`);

    // same with messageId and emoji
    // ...

    const memberrole = message.member.roles.cache.find((role) => role.name === 'CEO');
    if (!memberrole) return message.channel.send('Insufficiant perms');

    try {
      const channel = await message.client.channels.fetch(channelId);
      if (!channel)
        return message.channel.send(`No channel found with the ID ${channelId}`);

      const fetchedMessage = await channel.messages.fetch(messageId);
      if (!fetchedMessage)
        return message.channel.send(`No message found with the ID ${messageId}`);

      fetchedMessage.react(emoji);
    } catch (error) {
      console.log(error);
      message.channel.send('Oh-oh, there was an error...');
    }
  }
});