Receive Message Event

The next step is to finally receive the message.
The atmosphere is becoming more and more like a bot!

WARNING

Note, however, that to receive the group's message must store the decrypt key in FileStorage or so on, as described in Start 2.

First, let's create a bot that only receives “!ping” and returns “pong!”.

Chat

To receive messages, do the following.

client.on("message", (message) => {
    ...
});

This is all that is needed to receive the message.
Easy, isn't it?

So first, let's retrieve the messages sent.

client.on("message", (message) => {
    const text = message.content;

    console.log(text);
});

Your console should now show the message that was sent to you!

Hello EdamAmex
I love you! :D

Next, let's check if the message is “!ping”.

client.on("message", (message) => {
    const text = message.content;

    if (text === "!ping") {
        ...     
    }
});

This is perfect. Next time I need to reply.

To reply, you can call a method that sends a messageId with a relatedMessageId, but there is a more convenient way.

client.on("message", (message) => {
    const text = message.content;

    if (text === "!ping") {
        message.reply("pong!");
    }
});

What a beautiful code! It's too easy. However, in this case, it is more beautiful to enclose it in an asynchronous function.

client.on("message", async (message) => {
    const text = message.content;

    if (text === "!ping") {
        await client.reply("pong!");
    }
});

That's all!
There are also send, reaction, etc.
Let me explain all the methods in other chapters.

Square

So what should we do with Square (OpenChat)? Basically the same thing.

client.on("square:message", async (message) => {
    const text = message.content;

    if (text === "!ping") {
        await client.reply("pong!");
    }
});

With this alone you can create a basic bot.
There are many more features!

Stay tuned for our next journey.

TIP

If you encounter problems, please refer to Question, not only here.