ffc-pay-etl-framework/app/validators/required-validator.js

A framework for creating ETL pipelines in node

// @ts-nocheck
const { Transform } = require('node:stream')

/**
 *
 * @param {Object} options
 * @param {String} options.message
 * @param {Array} options.columns
 * @returns Transform
 */
function requiredValidator (options) {
  return new Transform({
    readableObjectMode: true,
    writableObjectMode: true,
    decodeStrings: false,
    construct (callback) {
      this.message = options.message ? options.message : 'Required value is null'
      this.requiredColumns = options.columns
      callback()
    },
    transform (chunk, _, callback) {
      this.requiredColumns.forEach(column => {
        const requiredVal = chunk[column]
        if (requiredVal === undefined || requiredVal === '') {
          chunk.errors.push(`${this.message} in column ${column}`)
        }
      })
      callback(null, chunk)
    }
  })
}

module.exports = {
  RequiredValidator: requiredValidator
}