Animalese Command

commands/voice/animalese.js

@@ -0,0 +1,111 @@
+const Command = require('../../structures/Command');
+const path = require('path');
+const { reactIfAble, list } = require('../../util/Util');
+const fs = require('fs');
+const { WaveFile } = require('wavefile');
+const { Readable } = require('stream');
+const { LOADING_EMOJI_ID } = process.env;
+const pitches = {
+	low: 0.2,
+	semilow: 0.5,
+	medium: 1.0,
+	semihigh: 1.5,
+	high: 2
+};
+
+module.exports = class AnimaleseCommand extends Command {
+	constructor(client) {
+		super(client, {
+			name: 'animalese',
+			group: 'voice',
+			memberName: 'animalese',
+			description: 'Makes animalese based on text.',
+			guildOnly: true,
+			throttling: {
+				usages: 1,
+				duration: 10
+			},
+			userPermissions: ['CONNECT', 'SPEAK'],
+			credit: [
+				{
+					name: 'Acedio',
+					url: 'https://github.com/Acedio',
+					reason: 'Code, Sounds',
+					reasonURL: 'https://github.com/Acedio/animalese.js'
+				},
+				{
+					name: 'Nintendo',
+					url: 'https://www.nintendo.com/',
+					reason: 'Original "Animal Crossing" Game',
+					reasonURL: 'https://animal-crossing.com/'
+				}
+			],
+			args: [
+				{
+					key: 'pitch',
+					prompt: `What pitch do you want to use? Either ${list(Object.keys(pitches, 'or'))}.`,
+					type: 'string',
+					oneOf: Object.keys(pitches),
+					parse: pitch => pitches[pitch.toLowerCase()]
+				},
+				{
+					key: 'text',
+					prompt: 'What text should be said?',
+					type: 'string'
+				}
+			]
+		});
+
+		this.library = new fs.readFileSync(path.join(__dirname, '..', '..', 'assets', 'sounds', 'animalese.wav'));
+	}
+
+	async run(msg, { pitch, text }) {
+		const connection = this.client.voice.connections.get(msg.guild.id);
+		if (!connection) {
+			const usage = this.client.registry.commands.get('join').usage();
+			return msg.reply(`I am not in a voice channel. Use ${usage} to fix that!`);
+		}
+		if (this.client.dispatchers.has(msg.guild.id)) return msg.reply('I am already playing audio in this server.');
+		await reactIfAble(msg, this.client.user, LOADING_EMOJI_ID, '💬');
+		const dispatcher = connection.play(this.animalese(text, pitch));
+		this.client.dispatchers.set(msg.guild.id, dispatcher);
+		dispatcher.once('finish', () => this.client.dispatchers.delete(msg.guild.id));
+		dispatcher.once('error', () => this.client.dispatchers.delete(msg.guild.id));
+		await reactIfAble(msg, this.client.user, '🔉');
+		return null;
+	}
+
+	animalese(script, pitch) {
+		const processedScript = script.replace(/[^a-z]/gi, ' ').split(' ').map(this.shortenWord).join('');
+		const data = [];
+		const sampleFreq = 44100;
+		const libraryLetterSecs = 0.15;
+		const librarySamplesPerLetter = Math.floor(libraryLetterSecs * sampleFreq);
+		const outputLetterSecs = 0.075;
+		const outputSamplesPerLetter = Math.floor(outputLetterSecs * sampleFreq);
+		for (let cIndex = 0; cIndex < processedScript.length; cIndex++) {
+			const c = processedScript.toUpperCase()[cIndex];
+			if (c >= 'A' && c <= 'Z') {
+				const libraryLetterStart = librarySamplesPerLetter * (c.charCodeAt(0) - 'A'.charCodeAt(0));
+				for (var i = 0; i < outputSamplesPerLetter; i++) {
+					const libIndex = this.library[44 + libraryLetterStart + Math.floor(i * pitch)];
+					data[cIndex * outputSamplesPerLetter + i] = libIndex;
+			  	}
+			} else {
+			  	for (var i = 0; i < outputSamplesPerLetter; i++) {
+					data[cIndex * outputSamplesPerLetter + i] = 127;
+			  	}
+			}
+		}
+		const wav = new WaveFile();
+		wav.fromScratch(1, sampleFreq, '32', Array.from(data));
+		return Readable.from([wav.toBuffer()]);
+	}
+
+	shortenWord(str) {
+		if (str.length > 1) {
+			return str[0] + str[str.length - 1];
+		}
+		return str;
+	}
+};

package.json

@@ -77,6 +77,7 @@
 		"tictactoe-minimax-ai": "^1.2.1",
 		"user-agents": "^1.0.597",
 		"valid-url": "^1.0.9",
+		"wavefile": "^11.0.0",
 		"winston": "^3.3.3",
 		"ytdl-core": "^4.5.0"
 	},