こんにちはななしひろゆきです
今回はdiscordBOTを作りました
この記事は再掲載です

まずindex.jx

index.js

const { Client, Collection, GatewayIntentBits, Partials ,MessageEmbed} = require('discord.js');
const { createAudioResource, createAudioPlayer, joinVoiceChannel } = require('@discordjs/voice');
const fs = require('fs');
const { LISTENER } = require('./config.json');
const Database = require('better-sqlite3');
const db = new Database('inm_discord_bot', { verbose: console.log });
const client = new Client({
intents: [
GatewayIntentBits.Guilds,
GatewayIntentBits.GuildMembers,
GatewayIntentBits.GuildBans,
GatewayIntentBits.GuildEmojisAndStickers,
GatewayIntentBits.GuildIntegrations,
GatewayIntentBits.GuildWebhooks,
GatewayIntentBits.GuildInvites,
GatewayIntentBits.GuildVoiceStates,
GatewayIntentBits.GuildPresences,
GatewayIntentBits.GuildMessages,
GatewayIntentBits.GuildMessageReactions,
GatewayIntentBits.GuildMessageTyping,
GatewayIntentBits.DirectMessages,
GatewayIntentBits.DirectMessageReactions,
GatewayIntentBits.DirectMessageTyping,
GatewayIntentBits.MessageContent,
GatewayIntentBits.GuildScheduledEvents,
],
partials: [
Partials.User,
Partials.Channel,
Partials.GuildMember,
Partials.Message,
Partials.Reaction,
Partials.GuildScheduledEvent,
Partials.ThreadMember,
],
});

client.commands = new Collection();
const commandFiles = fs.readdirSync('./commands').filter(file => file.endsWith('.js'));

for (const file of commandFiles) {
  const command = require(`./commands/${file}`);
  client.commands.set(command.data.name, command);
}

client.once('ready', () => {
  console.log('起動完了');
});

client.on('interactionCreate', async interaction => {
  if (!interaction.isCommand()) {
  return;
  }
  const { commandName } = interaction;
  const command = client.commands.get(commandName);
  console.log(command);
  if (!command) {
    return;
  }
  try {
    await command.execute(interaction);
  } catch (error) {
    console.error(error);
    interaction.reply('There was an error trying to execute that command!');
  }
});

client.on('messageCreate',async message => {
  if (!message.author.bot && message.content.length > 0) {
    console.log(message.content);
    try {
      const voiceChannel = message.member.voice.channel;
      var filePath = '';
      var file = ('%'+message.content+'%');
      var check =  db.prepare('SELECT voice_file_name.name,voice_select_name.* FROM voice_select_name INNER JOIN voice_file_name ON voice_file_name.id = voice_select_name.voice_file_name WHERE voice_select_name.name LIKE ?').get(file);
      if(!check){
      }else{
        console.log(check.name);
        var select_voice = db.prepare(' SELECT * FROM voice_file_name WHERE id = ?').get(check.voice_file_name);
        filePath = './voice_file/'+select_voice.name;
        console.log(filePath);
      }
      if (!fs.existsSync(filePath)) {
        return await message.reply('指定されたWAVファイルが見つかりません。'+filename);
      }
      // ボイスコネクションを作成し、ボイスチャンネルに接続します。
      const connection = joinVoiceChannel({
        channelId: voiceChannel.id,
        guildId: voiceChannel.guild.id,
        adapterCreator: voiceChannel.guild.voiceAdapterCreator,
      });
      
      // 再生するオーディオリソースを作成します。
      const resource = createAudioResource(filePath);

      // オーディオプレーヤーを作成し、オーディオリソースを再生します。
      const player = createAudioPlayer();
      connection.subscribe(player);
      player.play(resource);
    
    } catch (error) {
      console.error(error);
      message.reply('There was an error trying to execute that command!');
    }
  }
});

client.login(LISTENER.TOKEN);

続いてdeploy_commands.js

deploy_commands.js

const { SlashCommandBuilder } = require('@discordjs/builders'); //SlashCommandBuilderを読み込む
const fs = require('fs');
const { REST } = require('@discordjs/rest'); //RESTを読み込む
const { Routes } = require('discord-api-types/v9'); //Routesを読み込む
const { LISTENER,GUILD_ID } = require('./config.json');
const client_id  = LISTENER.CLIENT_ID //クライアントIDをclient_idに代入
const guild_id = GUILD_ID //サーバーIDをguild_idに代入
const token = LISTENER.TOKEN //トークン
const commandFiles = fs.readdirSync('./commands').filter(file => file.endsWith('.js'));
const test = [].map(command => command.toJSON());
  for (const file of commandFiles) {
       const commacommandBOTnd = require(`./commands/${file}`);
       test.push(new SlashCommandBuilder().setName(commacommandBOTnd.data.name).setDescription(commacommandBOTnd.data.description));
  }
const rest = new REST({ version: '9' }).setToken(token);
rest.put(Routes.applicationGuildCommands(client_id, guild_id), { body: test }) 
    .then(() => console.log('Successfully registered application commands.'))
    .catch(console.error); //指定したサーバーにコマンドを登録・更新

続いてvoicechat.js

voicechat.js

const { SlashCommandBuilder } = require('discord.js');

// BOTをVCに参加させるために必要。
const { joinVoiceChannel } = require('@discordjs/voice');

const { LISTENER } = require('../config.json');

module.exports = {
	data: new SlashCommandBuilder()
        // コマンドの名前
		.setName('join')
        // コマンドの説明文
		.setDescription('VCに参加。'),
	async execute(interaction) {
        // VCに参加する処理
		const connection = joinVoiceChannel({
			guildId: interaction.guildId,
			channelId: LISTENER.VC_ID,
			adapterCreator: interaction.guild.voiceAdapterCreator,
		});
		await interaction.reply('参加しました！');
	},
};

続いてcomandsファイルの中にあるコマンドを実行した際に起動するコード

join.js

const { SlashCommandBuilder } = require('@discordjs/builders');

// BOTをVCに参加させるために必要。
const { joinVoiceChannel } = require('@discordjs/voice');

const { LISTENER } = require('../config.json');

module.exports = {
	data: new SlashCommandBuilder()
        // コマンドの名前
		.setName('join')
        // コマンドの説明文
		.setDescription('VCに参加。'),
	async execute(interaction) {
        // VCに参加する処理
		const connection = joinVoiceChannel({
			guildId: interaction.guildId,
			channelId: LISTENER.VC_ID,
			adapterCreator: interaction.guild.voiceAdapterCreator,
		});
		await interaction.reply('おまたせ');
	},
};

disconnect.js

const { SlashCommandBuilder } = require('@discordjs/builders');
const { LISTENER } = require('../config.json');
const { joinVoiceChannel, getVoiceConnection } = require('@discordjs/voice');

module.exports = {
  data: new SlashCommandBuilder()
    .setName('disconnect')
    .setDescription('ボイスチャンネルから切断します。'),

  async execute(interaction) {
    // 接続済みのボイスコネクションを取得します。
    const connection = getVoiceConnection(interaction.guildId);
    // もし接続が存在しなければ、エラーを返します。
    if (!connection) {
      return await interaction.reply('ボイスチャンネルに接続していません。');
    }
    // ボイスチャンネルから切断します。
    connection.destroy();

    // 成功メッセージを返します。
    return await interaction.reply('ボイスチャンネルから切断しました。');
  },
};

続いて
データベースに値を入れる為のjs

database.js

console.log('helloworld');
const Database = require('better-sqlite3');
const fs = require('fs');
const db = new Database('inm_discord_bot', { verbose: console.log });
const commandFiles = fs.readdirSync('./voice_file').filter(file => file.endsWith('.wav'));
console.log(commandFiles);
var stmt = db.prepare('INSERT INTO voice_file_name (name) VALUES (?);');
for (const file of commandFiles) {
    var check =  db.prepare('SELECT * FROM voice_file_name WHERE name = ?').get(file);
    if(!check){
        stmt.run(file);
    }
}
const row = db.prepare('SELECT * FROM voice_file_name ').get();
console.log(row);

database.jsにてデータを入れたのちdeploy.jsを起動する事で呼び出すようにしてあります