如何在 JDA 中将 DM 发送给有响应的人

Question

我正在我的 Discord Bot 中编写一个反馈功能，当有人离开时，应该向他们发送 DM 消息询问他们离开的原因。

event.getUser().openPrivateChannel()
                .flatMap(channel -> channel.sendMessage("Hello, we are sorry you're leaving "+event.getGuild().getName()+", if you don't mind, please tell us why you left or leave any other feedback here, it'll help us improve the server and improve experience for you if you re-join again in the future.\n\nThank you ❤."))
                .queue();

上面的代码是负责发送的，我尝试在私有频道中创建状态机但是没有成功：


import bot.Main;
import net.dv8tion.jda.api.EmbedBuilder;
import net.dv8tion.jda.api.entities.MessageChannel;
import net.dv8tion.jda.api.entities.User;
import net.dv8tion.jda.api.events.message.MessageReceivedEvent;
import net.dv8tion.jda.api.hooks.ListenerAdapter;

public class Feedback extends ListenerAdapter {
    private final long channelId, authorId;

    public Feedback(MessageChannel channel, User author) {
        this.channelId = channel.getIdLong();
        this.authorId = author.getIdLong();
    }

    @Override
    public void onMessageReceived(MessageReceivedEvent event) {
        if (event.getAuthor().isBot()) return;
        if (event.getAuthor().getIdLong() != authorId) return;
        if (event.getChannel().getIdLong() != channelId) return;
        MessageChannel channel = event.getChannel();
        String content = event.getMessage().getContentRaw();
        event.getChannel().sendMessage("Thanks for your feedback!").queue();
        EmbedBuilder feedback = new EmbedBuilder();
        feedback.setTitle("Automated System Operations - Leaving Feedback");
        feedback.addField("Feedback", content, false);
        feedback.setColor(0xC90004);
        feedback.setAuthor(event.getAuthor().getAsTag()+" - "+event.getAuthor().getId(), "https://support.discord.com/hc/en-us/articles/209572128-How-do-I-log-out-", event.getAuthor().getAvatarUrl());
        feedback.setImage("https://media.discordapp.net/attachments/894913784823566428/896323821336948736/unknown.png?width=384&height=192");
        Main.jda.getGuildById("894913620868202506").getTextChannelById("896322509874540545").sendMessage(feedback.build()).queue();
    }
}

我有这个事件状态机通道，但我不知道如何在 DM 中addListener。

接受任何帮助<3

Answer 1

您永远不必猜测如何使用库 - 这就是文档的用途。任何称职的图书馆都有文档列出每个 class、方法和您需要担心的属性。

快速 google 搜索“discord-jda 文档”将我们带到 JavaDoc：https://ci.dv8tion.net/job/JDA/javadoc/index.html

您想向用户发送消息，对吗？因此，让我们使用搜索栏查找 User。类型下的第一个结果是 net.dv8tion.jda.API.entities.User。我们现在 https://ci.dv8tion.net/job/JDA/javadoc/net/dv8tion/jda/api/entities/User.html

如果您想知道如何对用户做某事，我们会查看每个用户拥有的方法。两个立即引起了我的注意：User.hasPrivateChannel() 和 User.openPrivateChannel()。我们将点击第二个，因为它看起来很相关。

瞧瞧，文档中有示例用法！我将在下面引用它：

// Send message without response handling
public void sendMessage(User user, String content) {
    user.openPrivateChannel()
        .flatMap(channel -> channel.sendMessage(content))
        .queue();

} 这看起来很简单。所以你正在寻找的基本用法（假设 event 是 MessageReceivedEvent）是这样的：

event.getAuthor().openPrivateChannel().flatMap(channel -> channel.sendMessage("hello")).queue();

Answer 2

您可以使用 JDA#addEventListener 添加状态机事件侦听器:

event.getUser().openPrivateChannel().flatMap(channel -> {
  event.getJDA().addEventListener(new Feedback(channel, event.getUser()));
  return channel.sendMessage("hello");
}).queue();

我建议您在收到 event.getJDA().removeEventListener(this);

的响应后删除您的事件侦听器

如何在 JDA 中将 DM 发送给有响应的人

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