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Alpha version of ALBot 2.0, the spiritual successor to ALBot

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ALBot 2.0 Alpha

Alpha version of ALBot 2.0, the spiritual successor to ALBot. ALBot 2.0 uses Discord.js to interface with the Discord API, supplanting ALBot's dependency on the deprecated Discord.py library.

To get started working on the bot, first clone the repository! Then proceed to the Dependencies and Building and Testing sections of this README.

Dependencies

The only non-npm managed dependency is Node.js. Install Node.js here. This will also install npm. The necessary versions for node and npm are:

  • node: v16.13.2
  • npm: 8.1.2

After installing node and npm, run the following command:

npm install

Linting

Running this command will install the node package dependencies. One of these is ESLint, a linter for Javascript. If desired, you can install an ESLint extension for your development environment to provide code highlighting based on the project's linting rules.

Building and Testing

To run and test the bot locally, you will need to set up a a test bot and a bot testing server in Discord. Only you and the test bot need to be in this server.

Creating your test bot is a quick process, and just requires changing some settings in Discord. Follow the guide linked here to create your bot. Using its token will be discussed shortly.

Once your bot is created, create a server for bot testing under your Discord account. Then, follow this guide to add your bot to the testing server. You will need to give the bot the following permissions: bot and applications.commands.

Good work! Now your test bot application is created and waiting in your server. The last thing you need to do for setup is create a config.json file.

This file is loaded by the application at runtime and stores confidential tokens and IDs specific to your bot. NEVER COMMIT YOUR config.json! If you do, promptly go to Discord developer portal and request new tokens.

To create the config.json, first take a look at config.json.example. This file provides the basic schema for your config.json. To create your config.json, copy the contents of config.json.example into yours but substitute the following values for each of the keys in the JSON object as follows:

  • clientId: Substitute in the client id provided for your bot application found on the Discord Developer Portal. You can find it under the OAuth2 section.
  • guildId: Substituted in the guild id for your bot testing server. You can find it in Discord by right-clicking your server in Discord and then selecting the "Copy ID" option at the bottom. You will have to enable Developer Mode to see this option.
  • token: Substitute in the token for your bot application found on the Discord Developer Portal.

Once your config.json is setup, it's time to run the application!

First, run the following to deploy the commands to the bot:

npm run deploy-commands

Next, launch the bot!

npm run start

If you see a "Ready! Logged in as. . ." message, you've succeeded!

Architecture

ALBot 2.0's functionality is distributed across several files. The src/index.ts contains the 'main' of the program, and should be executed using node to launch the bot (npm run start or ts-node src/index.ts). The client object in index.ts is the bot - that is, it contains all the functionality as properties.

The commands ALBot can perform are stored in the src/commands/ directory. Each command is stored in its own .ts file with the name of the command being the file name (e.g. command /foo is in foo.ts). All commands implement the ICommand inteface defined in src/icommand.ts.

Each command object implements the ICommand inteface. ICommand describes an inteface with the following attributes:

  • name: the name of the command
  • description: a description of its purpose
  • execute(interaction: Interaction): a function which contains the commands functionality.

Dispatching interactions to the proper commands is handled by the interactionCreate event (see events/interactionCreate.js). The commands are compiled into a key-value store at runtime when the bot is started, with names as keys and the object as value (see src/commands.ts). Import commands.ts to access this store.

The bots interactivity is implemented using an event handling architecture wherein event handlers are specified by modules in the src/events/ directory. Each .ts file in events/ exports a distinct event handler. The naming scheme mimics that of the command files: an event foo is handled in foo.js.

Each event handler implements the IEvent interface type, which includes the following attributes:

  • name: name of the event being handled
  • once (optional): true if the command only executes once, false if it should be run on every ocurrence.
  • execute(any[]): void | Promise<void>: the function executed to handle the event

These events are loaded into the client object at runtime when the bot is started.

Acknowledgement

This project was built with the help of the Discord.js guides.

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