Create validators for all fields

[Hudson Silva Borges]

[Paulo Henrique de Carvalho]

First case: article number - must consist numerals

1. new file - app/objects/validators/number.js: regex for article number

class NumberValidator {
  constructor() { }

  validate(value) {
    return {
      isValid: /^\d/.test(value),
      message: 'Must consist of numerals (e.g., 99).'
    };
  }
}

export default (new NumberValidator());

2. app/objects/validators/index.js: enable number validation

import number from './number';

class Validator {
  constructor() {
    this.number = number;
  }
}

[Paulo Henrique de Carvalho]

Create validator for all required attributes.