从机器人Discord.js获取机器人消息

Question

我试图制作一个机器人，在通道中获取以前的机器人消息，然后删除它们。我现在有这个代码，当输入!clearMessages时删除通道中的所有消息：

if (message.channel.type == 'text') {
    message.channel.fetchMessages().then(messages => {
        message.channel.bulkDelete(messages);
        messagesDeleted = messages.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);
    });
}

我希望机器人只从该通道中的所有机器人消息中获取消息，然后删除这些消息。

我该怎么做？

Answer 1

每个Message都有一个代表author property的User。每个User都有一个bot property，表明用户是否是机器人。

使用该信息，我们可以使用messages.filter(msg => msg.author.bot)过滤掉非机器人消息的消息：

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);
    });
}