Crop to content command

README.md

@@ -71,7 +71,7 @@ Just read `LICENSE.md`. Give credit if you use any part of this monster, thanks.
 22. Start Xiao up!
 
 ## Commands
-Total: 510
+Total: 511
 
 ### Utility:
 
@@ -392,6 +392,7 @@ Total: 510
 * **contrast:** Draws an image or a user's avatar but with contrast.
 * **convert-image:** Converts an image from one format to another.
 * **create-qr-code:** Converts text to a QR Code.
+* **crop-to-content:** Crops an image to its content.
 * **desaturate:** Draws an image or a user's avatar but desaturated.
 * **dexter:** Draws an image or a user's avatar over the screen of Dexter from Pokémon.
 * **distort:** Draws an image or a user's avatar but distorted.

commands/edit-image/crop-to-content.js

@@ -0,0 +1,42 @@
+const Command = require('../../framework/Command');
+const { PermissionFlagsBits } = require('discord.js');
+const { createCanvas, loadImage } = require('canvas');
+const request = require('node-superfetch');
+const { cropToContent } = require('../../util/Canvas');
+
+module.exports = class CropToContentCommand extends Command {
+	constructor(client) {
+		super(client, {
+			name: 'crop-to-content',
+			group: 'edit-image',
+			memberName: 'crop-to-content',
+			description: 'Crops an image to its content.',
+			throttling: {
+				usages: 2,
+				duration: 10
+			},
+			clientPermissions: [PermissionFlagsBits.AttachFiles],
+			args: [
+				{
+					key: 'image',
+					type: 'image'
+				}
+			]
+		});
+	}
+
+	async run(msg, { image }) {
+		const { body } = await request.get(image);
+		const data = await loadImage(body);
+		const canvas = createCanvas(data.width, data.height);
+		const ctx = canvas.getContext('2d');
+		ctx.drawImage(data, 0, 0);
+		cropToContent(ctx, canvas, data.width, data.height);
+		if (canvas.width === data.width && canvas.height === data.height) {
+			return msg.say('Looks like this image is already cropped to its content.');
+		}
+		const attachment = canvas.toBuffer();
+		if (Buffer.byteLength(attachment) > 8e+6) return msg.reply('Resulting image was above 8 MB.');
+		return msg.say({ files: [{ attachment, name: 'crop-to-content.png' }] });
+	}
+};