discord.js - Imagine a bot•3y ago

Is it possible to generate the default thread name from a message with djs?

Discord has some algorithm in place to generate a default name for every thread created on a message. AFAIK this title cannot be made with the API since the name is required on POST/channels/{channel.id}/messages/{message.id}/threads. Is it possible to do these transformations with DJS, or does anyone know another library that does it?

31 Replies

d.js docs•3y ago

• What's your exact discord.js npm list discord.js and node node -v version? • Post the full error stack trace, not just the top part! • Show your code! • Explain what exactly your issue is. • Not a discord.js issue? Check out #useful-servers.

LeMorrowOP•3y ago

Two more examples of why it would be annoying to implement myself by reverse engineering it:

⸸⛧Stealth⛧⸸•3y ago

You want to thread name to be set? Or have a placeholder like discord does before making one If you want the first one, just listen to “threadCreate” event and then set the name of the thread that was created. The title is made to the reference of the first message of the thread/the message that the thread was started with and i think uses the max character limit to shorten in

LeMorrowOP•3y ago

I want the placeholder like Discord does before making one My bot will be the one creating the thread, based on a message So I want to generate it the same way Discord does with the API you are forced to provide a name (unlike how it is in the desktop client where it is optional)

⸸⛧Stealth⛧⸸•3y ago

Oh I understand what you’re saying, i think whenever you’re not setting the name from discord client it is optional because most likely they generate that title that I mentioned from the client not the backend

LeMorrowOP•3y ago

Yeah I think so too

⸸⛧Stealth⛧⸸•3y ago

So the backend always requires it

LeMorrowOP•3y ago

This is how I think their algorithm works (based just on my reverse engineering): If there is an image, use it's alt text If there is an embed, use the title of the embed Otherwise take one word at a time from the original message. As soon as adding a word would make the title go over 40 characters, discard that word, and the title is done. If there is only one "word" of 40+ characters long, use the first 40 characters and append an elipsis

⸸⛧Stealth⛧⸸•3y ago

Yes That is how it works

LeMorrowOP•3y ago

And this is one of those things that can change at any time... it feels hacky to hard-code it into the bot, y'know?

⸸⛧Stealth⛧⸸•3y ago

I don’t think you can hardcode that into the bot

LeMorrowOP•3y ago

Why wouldn't I be able to If I have message content I can access everything Discord has access to

⸸⛧Stealth⛧⸸•3y ago

I mean like i said you can do that yes But all I’m saying is you wanted it to have a placeholder Which is not possible

LeMorrowOP•3y ago

Not sure what you mean by placeholder in this case I want to create a thread based off of a message

d.js docs•3y ago

GuildChannelManager#create() Creates a new channel in the guild.

LeMorrowOP•3y ago

The name of the thread should be the same as the name it would've gotten by Discord if a user created a thread on the message manually This is what I am looking for how to do

⸸⛧Stealth⛧⸸•3y ago

Yea then try that and set the name property inside the create argument object

LeMorrowOP•3y ago

So I am stuck with having to reverse engineer their default name algorithm?

d.js docs•3y ago

GuildChannelCreateOptions Options used to create a new channel in a guild.

⸸⛧Stealth⛧⸸•3y ago

Ohhh I don’t think that is djs related that’s JS itself

LeMorrowOP•3y ago

wut I'm not asking how I would implement it

Is it possible to do these transformations with DJS, or does anyone know another library that does it?

It's specifically a DJS question I'm asking if there's some helper method somewhere that does this already in DJS

Unknown User•3y ago

Message Not Public

LeMorrowOP•3y ago

👍 thank you

⸸⛧Stealth⛧⸸•3y ago

That’s what i said, you have to make the algorithm yourself Cuz djs doesn’t seem to have it

monbrey•3y ago

No, discord.js does not have this Other than just giving you the message content You can truncate that wherever you like

LeMorrowOP•3y ago

Thanks for confirming. Guess I am stuck with hoping that discord changes their API and make the name optional just like how it is in the client Made a feature request about it

monbrey•3y ago

I really don't think this is much of an "algorithm". I expect that the placeholder thread name is done client side and sends the value to the API

LeMorrowOP•3y ago

I don't mean "algorithm" as in some big complicated thing. Just a sequence of steps it takes. This is what I have so far from how it works

monbrey•3y ago

Yeah fair enough

LeMorrowOP•3y ago

For future reference if anyone stumbles upon this: https://github.com/discord/discord-api-docs/discussions/5326

GitHub

Starting a thread from a message should not require name · Discussi...

When you are creating a thread on a message in the client, the name of the thread is optional: However, in the API, the name is not optional. It would be nice to make it optional so that we can use...

LeMorrowOP•3y ago

Thanks again Untested:

private generateDefaultThreadName(message: Message): string {
    const attachmentText = message.attachments.first()?.description;
    if (attachmentText) return attachmentText;

    const embedTitle = message.embeds.length > 0 && message.embeds[0].title;
    if (embedTitle) return embedTitle;

    const words = message.content.split(" ");
    let output = "";
    for (const word of words) {
        if (output.length + word.length > 40) break;
        output += word + " ";
    }

    if (words.length > 0 && output.length === 0) {
        output = words[0].substring(0, 40) + "...";
    }

    return output.trim();
}

private generateDefaultThreadName(message: Message): string {
    const attachmentText = message.attachments.first()?.description;
    if (attachmentText) return attachmentText;

    const embedTitle = message.embeds.length > 0 && message.embeds[0].title;
    if (embedTitle) return embedTitle;

    const words = message.content.split(" ");
    let output = "";
    for (const word of words) {
        if (output.length + word.length > 40) break;
        output += word + " ";
    }

    if (words.length > 0 && output.length === 0) {
        output = words[0].substring(0, 40) + "...";
    }

    return output.trim();
}

Tested it now and made sure it worked. Turns out Discord handles link/embed names different from message content names. Worked in the couple cases I tested it with.

// This is an approximation of Discord's own algorithm done in the Discord client
// https://github.com/discord/discord-api-docs/discussions/5326
private generateDefaultThreadName(message: Message): string {
    const attachmentText = message.attachments.first()?.description;
    if (attachmentText) return this.clampWithElipse(attachmentText, 40);

    const embedTitle = message.embeds.length > 0 && message.embeds[0].title;
    if (embedTitle) return this.clampWithElipse(embedTitle, 40);

    const words = message.content.split(" ");
    let output = "";
    for (const word of words) {
        if (output.length + word.length > 40) break;
        output += word + " ";
    }

    if (words.length > 0 && output.length === 0) {
        output = words[0].substring(0, 40) + "...";
    }

    return output.trim();
}

private clampWithElipse(input: string, maxLength: number) {
    const output = input.substring(0, maxLength);
    return input.length > maxLength ? output + "..." : output;
}

// This is an approximation of Discord's own algorithm done in the Discord client
// https://github.com/discord/discord-api-docs/discussions/5326
private generateDefaultThreadName(message: Message): string {
    const attachmentText = message.attachments.first()?.description;
    if (attachmentText) return this.clampWithElipse(attachmentText, 40);

    const embedTitle = message.embeds.length > 0 && message.embeds[0].title;
    if (embedTitle) return this.clampWithElipse(embedTitle, 40);

    const words = message.content.split(" ");
    let output = "";
    for (const word of words) {
        if (output.length + word.length > 40) break;
        output += word + " ";
    }

    if (words.length > 0 && output.length === 0) {
        output = words[0].substring(0, 40) + "...";
    }

    return output.trim();
}

private clampWithElipse(input: string, maxLength: number) {
    const output = input.substring(0, maxLength);
    return input.length > maxLength ? output + "..." : output;
}

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Is it possible to generate the default thread name from a message with djs?