xiao/commands/avatar-edit/hat.js

const { Command } = require('discord.js-commando');
const { createCanvas, loadImage } = require('canvas');
const snekfetch = require('snekfetch');
const path = require('path');
const { list } = require('../../util/Util');
const hats = ['christmas', 'anime', 'tophat', 'pilgrim'];

module.exports = class HatCommand extends Command {
	constructor(client) {
		super(client, {
			name: 'hat',
			group: 'avatar-edit',
			memberName: 'hat',
			description: 'Draws a hat over a user\'s avatar.',
			throttling: {
				usages: 1,
				duration: 15
			},
			clientPermissions: ['ATTACH_FILES'],
			args: [
				{
					key: 'type',
					prompt: `What type of hat would you like to use? Either ${list(hats, 'or')}.`,
					type: 'string',
					validate: type => {
						if (hats.includes(type.toLowerCase())) return true;
						return `Invalid type, please enter either ${list(hats, 'or')}.`;
					},
					parse: type => type.toLowerCase()
				},
				{
					key: 'user',
					prompt: 'Which user would you like to edit the avatar of?',
					type: 'user',
					default: ''
				}
			]
		});
	}

	async run(msg, { type, user }) {
		if (!user) user = msg.author;
		const avatarURL = user.displayAvatarURL({
			format: 'png',
			size: 512
		});
		try {
			const base = await loadImage(path.join(__dirname, '..', '..', 'assets', 'images', 'hat', `${type}.png`));
			const { body } = await snekfetch.get(avatarURL);
			const avatar = await loadImage(body);
			const canvas = createCanvas(avatar.width, avatar.height);
			const ctx = canvas.getContext('2d');
			ctx.drawImage(avatar, 0, 0);
			ctx.drawImage(base, 0, 0, avatar.width, avatar.height);
			return msg.say({ files: [{ attachment: canvas.toBuffer(), name: `${type}-hat.png` }] });
		} catch (err) {
			return msg.reply(`Oh no, an error occurred: \`${err.message}\`. Try again later!`);
		}
	}
};