A unified function to send messages across multiple platforms including Discord, Slack, OneSignal, and Twilio.

import { sendMessage } from "./sendMessage.ts";

// Send to Discord
await sendMessage('discord', {
  content: "Hello from Discord!",
  url: "https://discord.com/api/webhooks/your-webhook-url" // optional if DISCORD_WEBHOOK_URL is set
});

// Send to Slack
await sendMessage('slack', {
  text: "Hello from Slack!",
  blocks: [/* optional blocks */],
  thread_ts: "optional-thread-timestamp"
});

// Send OneSignal notification
await sendMessage('onesignal', {
  heading: "Important Update",
  message: "This is a push notification",
  url: "https://example.com", // optional
  segment: ["All"] // optional, uses DEFAULT_ONESIGNAL_SEGMENT if not provided
});

// Send SMS via Twilio
await sendMessage('twilio', {
  toNumber: "+1234567890",
  message: "Hello via SMS!",
  fromNumber: "+0987654321" // optional if TWILIO_FROM_NUMBER is set
});

• DISCORD_WEBHOOK_URL - Discord webhook URL (can also be passed in message body)

Choose one of these configurations:

• SLACK_WEBHOOK_URL - Simple webhook URL (recommended for basic usage)
• OR both:
  • SLACK_BOT_TOKEN - Bot token for advanced features
  • SLACK_CHANNEL_ID - Channel to post to

• ONESIGNAL_TOKEN - OneSignal API token
• SEGMENT_APPID - OneSignal app ID
• DEFAULT_ONESIGNAL_SEGMENT - Default segment to send to (optional)

• TWILIO_ACCOUNT_SID - Twilio account SID
• TWILIO_AUTH_TOKEN - Twilio auth token
• TWILIO_FROM_NUMBER - Default from number (can be overridden in message body)

To add a new platform:

1. Add the platform name to the Platform type
2. Create a new interface for the message body type
3. Add the new interface to the MessageBody union type
4. Add a new case to the switch statement in sendMessage
5. Implement the platform-specific function

Example for adding email support:

interface EmailMessage {
  to: string;
  subject: string;
  text?: string;
  html?: string;
}

type MessageBody = DiscordMessage | SlackMessage | OneSignalMessage | TwilioMessage | EmailMessage;
type Platform = 'discord' | 'slack' | 'onesignal' | 'twilio' | 'email';

// Add to switch statement
case 'email':
  return await sendEmailMessage(body as EmailMessage);

The function throws descriptive errors for:

• Missing environment variables
• Invalid platform names
• API errors from each platform
• Missing required parameters

Always wrap calls in try-catch blocks for production use:

try {
  await sendMessage('discord', { content: "Hello!" });
} catch (error) {
  console.error("Failed to send message:", error.message);
}