Guild Monitoring: Notify User Of New Joins

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Guild Monitoring: Notify User of New Joins

Hey guys! So you want to create a function that keeps an eye on all the Discord guilds a specific user is a member of, and shoot them a notification whenever a new user joins any of those guilds? Sounds like a cool project! Let's break down how we can achieve this. This can be quite an engaging task, but with a structured approach, you can develop a robust solution.

Understanding the Goal

Before diving into the code, let's clarify our objectives. We aim to develop a function that performs the following actions:

  1. Monitors Guilds: Tracks all the Discord guilds a specified user is a member of.
  2. Detects New Joins: Identifies when a new user joins any of these guilds.
  3. Notifies User: Sends a notification to the user, either in a specific channel or via direct message (DM), containing information about the guild and the new user.

Prerequisites

To accomplish this, you'll need:

  • A Discord bot: You should have already set up a Discord bot with the necessary permissions.
  • Discord.js library: Ensure you have the Discord.js library installed in your project. This library provides the tools to interact with the Discord API.
  • Node.js environment: You should have Node.js installed to run your bot.

Setting up the Bot

First, you'll need to set up your Discord bot and authenticate it with your Discord application. Here’s a basic setup:

Install Discord.js

If you haven't already, install the Discord.js library using npm:

npm install discord.js

Basic Bot Setup

Here’s a simple bot setup:

const Discord = require('discord.js');
const { Client, Events, GatewayIntentBits } = require('discord.js');
const client = new Client({ 
    intents: [
        GatewayIntentBits.Guilds,
        GatewayIntentBits.GuildMessages,
        GatewayIntentBits.GuildMembers,
        GatewayIntentBits.MessageContent,
    ],
});

const token = 'YOUR_BOT_TOKEN'; // Replace with your bot token

client.once('ready', () => {
    console.log('Bot is ready!');
});

client.login(token);

Replace 'YOUR_BOT_TOKEN' with your actual bot token. This code initializes the Discord client and logs a message when the bot is ready.

Implementing the Guild Monitoring Function

Now, let’s create the function to monitor guild joins and notify the user. The core of this functionality relies on the guildMemberAdd event, which is triggered whenever a new member joins a guild that the bot is in.

Listening for New Guild Members

We’ll use the guildMemberAdd event to detect when a new member joins a guild. Here’s how you can set it up:

client.on('guildMemberAdd', async (member) => {
    // Your logic here
});

Checking if the User is in the Guild

Inside the guildMemberAdd event, you need to check if the user you are monitoring is also a member of the guild. You can do this by fetching the user from the guild’s member list.

client.on('guildMemberAdd', async (member) => {
    const userIdToMonitor = 'USER_ID_TO_MONITOR'; // Replace with the user ID you want to monitor

    try {
        const monitoredUser = await member.guild.members.fetch(userIdToMonitor);

        if (monitoredUser) {
            // User is in this guild, proceed with notification
            const newMemberUsername = member.user.username;
            const guildName = member.guild.name;

            // Send notification to the monitored user
            monitoredUser.send(`New user ${newMemberUsername} joined guild ${guildName}!`);
        }
    } catch (error) {
        // User is not in this guild or an error occurred
        console.error('Error fetching user:', error);
    }
});

Replace 'USER_ID_TO_MONITOR' with the actual user ID you want to monitor. This code fetches the user from the guild and, if found, sends a DM to the monitored user with information about the new member and the guild.

Sending Notifications

You can send the notification as a direct message (DM) to the user or post it in a specific channel. Here’s how to do both:

Sending a DM

We already covered sending a DM in the previous section. Here’s the code again for clarity:

monitoredUser.send(`New user ${newMemberUsername} joined guild ${guildName}!`);

Sending to a Specific Channel

To send the notification to a specific channel, you need the channel ID. Here’s how you can do it:

const channelId = 'CHANNEL_ID'; // Replace with the channel ID
const channel = member.guild.channels.cache.get(channelId);

if (channel) {
    channel.send(`New user ${newMemberUsername} joined guild ${guildName}!`);
} else {
    console.error('Channel not found!');
}

Replace 'CHANNEL_ID' with the actual channel ID. This code retrieves the channel and sends a message to it.

Putting it All Together

Here’s the complete code:

const Discord = require('discord.js');
const { Client, Events, GatewayIntentBits } = require('discord.js');
const client = new Client({ 
    intents: [
        GatewayIntentBits.Guilds,
        GatewayIntentBits.GuildMessages,
        GatewayIntentBits.GuildMembers,
        GatewayIntentBits.MessageContent,
    ],
});

const token = 'YOUR_BOT_TOKEN'; // Replace with your bot token
const userIdToMonitor = 'USER_ID_TO_MONITOR'; // Replace with the user ID you want to monitor
const channelId = 'CHANNEL_ID'; // Replace with the channel ID (optional)

client.once('ready', () => {
    console.log('Bot is ready!');
});

client.on('guildMemberAdd', async (member) => {
    try {
        const monitoredUser = await member.guild.members.fetch(userIdToMonitor);

        if (monitoredUser) {
            const newMemberUsername = member.user.username;
            const guildName = member.guild.name;

            // Send notification to the monitored user via DM
            monitoredUser.send(`New user ${newMemberUsername} joined guild ${guildName}!`);

            // Send notification to a specific channel (optional)
            if (channelId) {
                const channel = member.guild.channels.cache.get(channelId);
                if (channel) {
                    channel.send(`New user ${newMemberUsername} joined guild ${guildName}!`);
                } else {
                    console.error('Channel not found!');
                }
            }
        }
    } catch (error) {
        console.error('Error fetching user:', error);
    }
});

client.login(token);

Best Practices and Considerations

Error Handling

Always include error handling to catch any potential issues. The try...catch block in the code helps manage errors that might occur when fetching users or sending messages.

Rate Limiting

Be mindful of Discord's rate limits. If you're monitoring multiple guilds, you might hit these limits. Implement delays or use libraries like p-queue to manage the rate at which you send requests.

Permissions

Ensure your bot has the necessary permissions to fetch members and send messages in the guilds and channels you are monitoring. The bot needs the GuildMembers intent to access the member list of a guild.

Scalability

For larger applications, consider using a database to store the guilds a user is in. This can help you efficiently manage and monitor multiple users across many guilds.

Security

Keep your bot token secure and avoid hardcoding sensitive information in your code. Use environment variables or configuration files to manage tokens and IDs.

Conclusion

Creating a function to monitor guild joins and notify a user involves setting up a Discord bot, listening for the guildMemberAdd event, and sending notifications via DMs or specific channels. By following the steps outlined in this guide, you can build a robust and efficient guild monitoring system.

Remember to handle errors, manage rate limits, and ensure your bot has the necessary permissions. Happy coding, and may your Discord bot always be vigilant!