tasks

@commandkit/tasks

Task management plugin for CommandKit. Provides on-demand task creation and management with support for both static and dynamic tasks.

Features

• Static Tasks: Define tasks in your codebase that run on schedules
• Dynamic Tasks: Create tasks on-demand from commands or events
• Multiple Drivers: Support for in-memory, SQLite, and BullMQ persistence
• HMR Support: Hot reload tasks during development
• Flexible Scheduling: Support for cron expressions, dates, and dynamic schedules

Installation

npm install @commandkit/tasks

Quick Start

1. Add the plugin to your CommandKit configuration

import { defineConfig } from 'commandkit/config';
import { tasks } from '@commandkit/tasks';

export default defineConfig({
  plugins: [tasks()],
});

2. Set up a driver (optional)

By default, the plugin will initialize the sqlite driver. You can set up a different driver by calling setDriver function from the @commandkit/tasks package. If you want to disable the default driver initialization behavior, you can pass initializeDefaultDriver: false to the tasks() options in your commandkit config.

import { setDriver } from '@commandkit/tasks';
import { SQLiteDriver } from '@commandkit/tasks/sqlite';

setDriver(new SQLiteDriver('./tasks.db'));

3. Create static tasks

Create a file in src/app/tasks/:

import { task } from '@commandkit/tasks';

export default task({
  name: 'refresh-exchange-rate',
  schedule: { type: 'cron', value: '0 0 * * *' }, // daily at midnight
  async execute(ctx) {
    // Fetch latest exchange rates
    const rates = await fetchExchangeRates();
    await updateDatabase(rates);
  },
});

4. Create dynamic tasks from commands

import type { CommandData, ChatInputCommand } from 'commandkit';
import { ApplicationCommandOptionType } from 'discord.js';
import ms from 'ms';
import { createTask } from '@commandkit/tasks';

export const command: CommandData = {
  name: 'remind-me',
  description: 'Set a reminder',
  options: [
    {
      name: 'time',
      description: 'The time to remind after. Eg: 6h, 10m, 1d',
      type: ApplicationCommandOptionType.String,
      required: true,
    },
    {
      name: 'message',
      description: 'The message to remind about.',
      type: ApplicationCommandOptionType.String,
      required: true,
    },
  ],
};

export const chatInput: ChatInputCommand = async (ctx) => {
  const time = ctx.options.getString('time', true);
  const message = ctx.options.getString('message', true);
  const timeMs = Date.now() + ms(time as `${number}`);

  await createTask({
    name: 'reminder',
    data: {
      userId: ctx.interaction.user.id,
      message,
      channelId: ctx.interaction.channelId,
      setAt: Date.now(),
    },
    schedule: {
      type: 'date',
      value: timeMs,
    },
  });

  await ctx.interaction.reply(
    `I will remind you <t:${Math.floor(timeMs / 1000)}:R> for \`${message}\``,
  );
};

API Reference

Task Definition

interface TaskDefinition {
  name: string;
  schedule?: TaskSchedule;
  prepare?: (ctx: TaskContext) => Promise<boolean>;
  execute: (ctx: TaskContext) => Promise<void>;
}

Schedule Types

type TaskSchedule = 
  | { type: 'cron'; value: string; timezone?: string }
  | { type: 'date'; value: Date | number; timezone?: string };

Functions

task(definition: TaskDefinition)

Creates a task definition.

createTask(task: TaskData)

Creates a dynamic task.

deleteTask(identifier: string)

Deletes a scheduled task.

Drivers

SQLite Driver

Persistent job queue with recovery on restart.

import { SQLiteDriver } from '@commandkit/tasks/sqlite';

setDriver(new SQLiteDriver('./tasks.db'));

Features:

• Jobs recoverable on restart
• Persistent job data
• Cron expression support via cron-parser

BullMQ Driver

Distributed task scheduling with Redis.

import { BullMQDriver } from '@commandkit/tasks/bullmq';

setDriver(new BullMQDriver({
  host: 'localhost',
  port: 6379,
}));