overseerr/server/lib/notifications/index.ts

import logger from '../../logger';
import type { NotificationAgent, NotificationPayload } from './agents/agent';

export enum Notification {
  MEDIA_PENDING = 2,
  MEDIA_APPROVED = 4,
  MEDIA_AVAILABLE = 8,
  MEDIA_FAILED = 16,
  TEST_NOTIFICATION = 32,
  MEDIA_DECLINED = 64,
  MEDIA_AUTO_APPROVED = 128,
}

export const hasNotificationType = (
  types: Notification | Notification[],
  value: number
): boolean => {
  let total = 0;

  // If we are not checking any notifications, bail out and return true
  if (types === 0) {
    return true;
  }

  if (Array.isArray(types)) {
    // Combine all notification values into one
    total = types.reduce((a, v) => a + v, 0);
  } else {
    total = types;
  }

  return !!(value & total);
};

class NotificationManager {
  private activeAgents: NotificationAgent[] = [];

  public registerAgents = (agents: NotificationAgent[]): void => {
    this.activeAgents = [...this.activeAgents, ...agents];
    logger.info('Registered notification agents', { label: 'Notifications' });
  };

  public sendNotification(
    type: Notification,
    payload: NotificationPayload
  ): void {
    logger.info(`Sending notification(s) for ${Notification[type]}`, {
      label: 'Notifications',
      subject: payload.subject,
    });

    this.activeAgents.forEach((agent) => {
      if (agent.shouldSend(type)) {
        agent.send(type, payload);
      }
    });
  }
}

const notificationManager = new NotificationManager();

export default notificationManager;