Rules are a way to run code before or after a request is processed.

This example below is a rule that proper cases the first letter of the
the user's first name.

It run's before the user is saved to the database at order 30 on all create and update transactions.

A few things to note;

• The properties are all functional
• They either control the order, or determine if this rule is run
• command takes different inputs depending on the operation as listed here

import { logger } from 'src/lib/logger'
module.exports = {
  active: true,
  order: 30,
  when: ['before'],
  operation: ['create', 'update'],
  table: 'user',
  file: __filename,
  command: async function ({ input, status }) {
    try {
      if (input?.name) {
        let name = input.name
        let firstCharacter = name.charAt(0)
        if (firstCharacter !== firstCharacter.toUpperCase()) {
          input.name = name[0].toUpperCase() + name.substring(1)
        }
      }
    } catch (e) {
      logger.error(e)
    }
    return await { input, status }
  },
}