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javascript - 我正在安排 Discord.js 机器人，但它没有发送消息

问题描述

我正在制作一个 discord.js 调度机器人。我为此使用节点计划。它没有抛出任何错误，但仍然没有发送消息。我做错了什么，我该如何摆脱这个问题？（先感谢您）

我的代码是：

const Discord = require('discord.js');
const client = new Discord.Client();
const schedule = require('node-schedule');


client.once('ready', () => {
  console.log('Ready!');
});

client.login('TOKEN IS HERE');

const rule = new schedule.RecurrenceRule();
rule.tz = 'EDT';


client.on('message', message => {
  if (message.content === '!schedule 9pm meeting') {
    message.channel.send('Alright. I will announce it for you, friend! :smiley:');
    const job = schedule.scheduleJob('00 21 * * *', function () {
      client.channels.cache.get("channel id is here").send("This is a test message. Does it work?");
    });
  }
});

标签： javascriptdiscord.jsnode-schedule

解决方案

您不能schedule.scheduleJob在函数内部运行 fromclient.on并期望消息仍然存在。Discord API 期望在超时之前的特定时间内对 webhook 做出响应。

此外，如果机器人在云服务上运行，它运行的节点可能会偶尔重新启动，这会弄乱内存中的数据，例如将 cron 作业附加到node-schedule.

持久化数据

您可能应该得到用户的预定时间并将数据保存在某种数据库中。您应该使用数据库读\写来保存云提供商重启之间的数据（除非您有付费订阅）。

有一个全局 cron 作业或间隔

由于您可能有数千个已安排的会议，因此在您的情况下，最好以一定的间隔检查会议并同时发送所有提醒。

假设用户不能给我们一个比某一分钟更具体的时间。然后我们可以每分钟检查一次提醒，知道我们会在会议开始前通知用户。

// Run checkForReminders every 60 seconds to scan DB for outstanding reminders
setInterval(checkForReminders, 60000);

// Parse reminder request, save to DB, DM confirmation to user
client.on('message', (msg) => {
    createNewReminder(msg);
});

新提醒处理

const createNewReminder = (msg) => {
    const formattedMessage = formatMessage(msg)

    // If message isn't a remindme command, cease function execution
    if (!formattedMessage.startsWith('!remindme')) {
        return
    }

    // Determine if message contains a number to assign to intervalInteger
    checkForNumbersInMessage(formattedMessage)

    // Final format for message to be sent at reminderTime
    const messageToDeliverToUser = formattedMessage.replace('!remindme', '')
            
    // Set integer and verb values for moment.add() parameters
    const intervalInteger = parseInt(checkForNumbersInMessage(formattedMessage))
    const intervalVerb = setIntervalVerb(formattedMessage)

    // Format time to send reminder to UTC timezone    
    const reminderTime = moment().utc().add(intervalInteger, intervalVerb).format('YYYY-MM-DD HH:mm:ss')

    // Save reminder to DB
    saveNewReminder(msg.author.id, msg.author.username, messageToDeliverToUser, reminderTime)

    // Send embedded message to author & notify author in channel of remindertime request
    const embed = createEmbed(messageToDeliverToUser, reminderTime)
    msg.author.send(embed)
    msg.channel.send(`${msg.author} - A reminder confirmation has been sent to your DMs. I will DM you again at the requested reminder time`)
}

稍后向公会或用户发送消息

为了稍后发送消息，将userId或保存guildId到数据库，然后从 discord 客户端检索用户或公会，并发送消息。

const checkForReminders = () => {
    db.serialize(() => {
        // Select all messages older than the current dateTime
        db.each("SELECT id, reminderTime, userID, message FROM reminders WHERE reminderTime < DATETIME()", (error, row) => {
            if (error || !row) {
                return console.log('Error or no row found')
            }

            // If reminders are found, fetch userIDs, then send the requested reminder through DM
            client.users.fetch(row.userID).then((user) => {
                user.send(`Hi, you asked to be reminded "${row.message}" - That's right now!`).catch(console.error)
                console.log(`Message delivered: ${row.message}`)
                console.log(`Message deleted successfully`)

            // Delete message after DMing to user 
            db.run("DELETE FROM reminders WHERE id = ?", [row.id])
                console.log('Message sent and removed successfully')
            })
        })    
    })
}

取自NathanDennis/discord-reminder-bot 的代码示例。查看存储库以获取完整示例。他评论了他的代码，所以很容易理解。

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