feat: create basic bot module

src/bot.ts

@@ -0,0 +1,105 @@
+import {
+	Client,
+	GatewayIntentBits,
+	OAuth2Scopes,
+	PermissionFlagsBits
+} from 'discord.js';
+import { Logger } from './utils/log';
+import { config } from './utils/config';
+
+export class Bot {
+	private client: Client | undefined;
+
+	private readonly token: string;
+	private readonly clientId: string;
+
+	private readonly log: Logger;
+
+	/*
+        class methods
+    */
+	private constructor() {
+		this.log = new Logger('Bot');
+
+		this.token = config.token;
+		this.clientId = config.client_id;
+	}
+
+	public async init(): Promise<void> {
+		this.log.info('Bot init');
+
+		if (this.client)
+			throw new Error('Client already exists, was init called twice?');
+
+		this.log.info('Instantiating client');
+		this.client = new Client({
+			intents: [
+				GatewayIntentBits.Guilds,
+				GatewayIntentBits.GuildMessages,
+				GatewayIntentBits.GuildVoiceStates,
+				GatewayIntentBits.MessageContent
+			]
+		});
+
+		this.log.info('Registering callbacks');
+		this.client.on('clientReady', () => this.onReady());
+		this.client.on('error', (err) => this.onError(err, false));
+		this.client.on('shardError', (err) => this.onError(err, true));
+
+		this.log.info('Logging in...');
+		await this.client.login(this.token);
+	}
+
+	/*
+        event listeners
+    */
+	private onReady(): void {
+		this.log.info('Logged in');
+
+		const inviteLink = this.client?.generateInvite({
+			scopes: [OAuth2Scopes.ApplicationsCommands, OAuth2Scopes.Bot],
+			permissions: [
+				PermissionFlagsBits.AddReactions,
+				PermissionFlagsBits.AttachFiles,
+				PermissionFlagsBits.ChangeNickname,
+				PermissionFlagsBits.Connect,
+				PermissionFlagsBits.Speak,
+				PermissionFlagsBits.ViewChannel,
+				PermissionFlagsBits.ReadMessageHistory,
+				PermissionFlagsBits.SendMessages,
+				PermissionFlagsBits.SendMessagesInThreads,
+				PermissionFlagsBits.SendVoiceMessages,
+				PermissionFlagsBits.EmbedLinks
+			]
+		});
+
+		this.log.info('Invite link: %s', inviteLink);
+	}
+
+	private onError(error: Error, isShardError: boolean): void {
+		if (isShardError)
+			this.log.error(
+				'A shard error ocurred: %s - %s - %s',
+				error.name,
+				error.message,
+				error.stack
+			);
+		else
+			this.log.error(
+				'An error ocurred: %s - %s - %s',
+				error.name,
+				error.message,
+				error.stack
+			);
+	}
+
+	/*
+        singleton logic
+    */
+	static #instance: Bot | null = null;
+
+	public static get get(): Bot {
+		if (!Bot.#instance) Bot.#instance = new Bot();
+		return Bot.#instance;
+	}
+}