javascript - 如何获取客户端用户的最后一条消息？

Question

您将如何获取机器人最后一条消息的对象？我尝试做类似的事情:

if (message.content.split(' ')[0] === 'test') {
   message.channel.sendMessage('Test')
   console.log(client.user.lastMessage.content)
}

如果我触发条件，控制台会给我一个错误:TypeError: Cannot read property 'content' of undefined

Answer 1

client.user.lastmessage 的值为null 的原因是因为您刚刚启动机器人，并且在您运行之前它没有发送任何消息你的 'test' 命令。

为了绕过这个，我会检查它是否为空(以防它不是)，如果它是，则使用 MessageCollector并等待您的消息发送。

    if (client.user.lastMessage == null) {
        // Set the collector for the same channel
        // Ensure the id is the same
        var myID = client.user.id;
        // Create collector and wait for 5 seconds (overkill but you never know with bad internet/lots of traffic)
        const collector = new Discord.MessageCollector(msg.channel, m => m.author.id === myID, { time: 5000 });
        collector.on('collect', message => {
            console.log(message.content);
            collector.stop("Got my message");
        });
    } else {
        console.log(client.user.lastMessage.content);
    }

我测试过的确切代码块:

    client.on('message', msg => {
        if (msg.content === '$ping') {
            msg.reply("Pong!")
            if (client.user.lastMessage == null) {
                const collector = new Discord.MessageCollector(msg.channel, m => m.author.id === client.user.id, { time: 10000 });
                collector.on('collect', message => {
                    console.log(message.content);
                    collector.stop("Got my message");
                })
            } else {
                console.log(client.user.lastMessage.content);
            }
        }
    }