remiderCron.js

import { onSchedule } from 'firebase-functions/v2/scheduler';
import { logger } from 'firebase-functions';

const sendEmailDummy = async (user) => {
  logger.info(`Sending email to ${user.email}...`);
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      logger.info(`Email sent to ${user.email}!`);
      resolve();
    }, 1000);
  });
};

const reminderCron = onSchedule('0 7 * * *', async () => {
  const data = [
    {
      name: 'John Doe',
      email: 'john@test.com',
    },
    {
      name: 'Jane Doe',
      email: 'jane@test.com',
    }
  ];

  for (const user of data) {
    await sendEmailDummy(user);
  }

  logger.info('Done sending emails!');

});

export default reminderCron;