Learn how to code Discord bot

What I learn from developing a discord bot to execute source code remotely

Table of Contents

Open Table of Contents

• Tech
• Projects to learn from
• Idea
• Process
• Learned
• Result

Tech

I used Judge0 for Code Execution. This project is wonderful. I just hope that one day I can understand this project thoroughly.

For Discord bot, I use Discord.js which is a wrapper for Discord API, to help making bot easier.

Projects to learn from

As a beginner, I also found some wonderful repositories to read, understand, learn from them. These are:

• anhhung04/teacher_assistant_discord_bot
• anhhung04/werewolf-bot
• judge0/discord-bot
• engineer-man/piston-bot

Idea

I always like discord embed view, it is actractive, elegant. I also want something cool, like execute code. So this is a good combination.

Process

First, I found out that if using slash command in discord, it would has better support when typing, because this is a feature specific to Discord. To use slash command (true slash command), we has to register to Discord.

But this is somewhat annoying, and finally I discovered that I can you just message to mimic slash command, just /some message. Doing this, the command is treated as normal message and we will do the rest on our own, like parsing command.

I chose a 12 dollar Digital Ocean VPS to host Judge0 because the 4 dollar doesn’t has enough RAM (not sure yet). Their docs are nice, but the language info is not correct. A litle tiring of finding the right language id.

Learned

I learned how to read docs, how to use Redis, Discordjs, Judge0, and learn how to create nice embed in discord, know the logic of making a bot.

Result