Haha-Yes/commands/general/ttsvc.js

const { Command } = require('discord-akairo');
const textToSpeech = require('@google-cloud/text-to-speech');
const gclient = new textToSpeech.TextToSpeechClient();
const fs = require('fs');

class TtsvcCommand extends Command {
    constructor() {
        super('ttsvc', {
            aliases: ['ttsvc'],
            category: 'general',
            split: 'none',
            args: [
                {
                    id: 'text',
                    type: 'string'
                }
            ],
            description: {
                content: 'Say what you wrote in voice channel',
                usage: '[text]',
                examples: ['hello']
            }
        });
    }

    async exec(message, args) {
        let text = args.text;

        const { voiceChannel } = message.member;


        // Construct the request
        const request = {
            input: { text: text },
            // Select the language and SSML Voice Gender (optional)
            voice: { languageCode: 'en-US', ssmlGender: 'NEUTRAL' },
            // Select the type of audio encoding
            audioConfig: { audioEncoding: 'MP3' },
        };

        // Performs the Text-to-Speech request
        gclient.synthesizeSpeech(request, (err, response) => {
            if (err) {
                console.error('ERROR:', err);
                return;
            }

            // Write the binary audio content to a local file
            fs.writeFile('ttsvc.mp3', response.audioContent, 'binary', err => {
                if (err) {
                    console.error('ERROR:', err);
                    message.channel.send('An error has occured, the message is probably too long');
                    fs.close();
                    return;
                }
                console.log('Audio content written to file: ttsvc.mp3');

                //  If not in voice channel ask user to join
                if (!voiceChannel) {
                    return message.reply('please join a voice channel first!');

                } else { // you should be careful in what is included in your scopes, you didn't use the {}
                    //  If user say "stop" make the bot leave voice channel
                    if (text == 'stop') {
                        voiceChannel.leave();
                        message.channel.send('I leaved the channel');
                    } else { // you should be careful in what is included in your scopes, you didn't use the {}
                        voiceChannel.join().then(connection => {
                            const dispatcher = connection.playStream('./ttsvc.mp3');
                            //  End at then end of the audio stream
                            dispatcher.on('end', () => setTimeout(function () {
                                voiceChannel.leave();
                            }, 2000));
                        });
                    }
                }
            });
        });
    }
}
module.exports = TtsvcCommand;