Core Validators

This library maintains all data validations

Get Started

nvm use
npm install

This will install all dependencies and install git hooks

Recommended Commit Message Format

<type>(<scope>): <short summary>
  │       │             │
  │       │             └─⫸ Summary in present tense. Not capitalized. No period at the end.
  │       │
  │       └─⫸ Commit Scope: Optional, can be anything specifying the scope of the commit change.
  |                          For example $location|$browser|$compile|$rootScope|ngHref|ngClick|ngView, etc.
  |                          In App Development, scope can be a page, a module or a component.
  │
  └─⫸ Commit Type: feat|fix|docs|style|refactor|test|chore|perf|ci|build|temp

Development

npm run test:unit

Keep watching unit tests while coding

Commits and Pushes

Commits message should follow recommendations above. On pre-commit all related tests based on staged files should be valid On pre-push all tests should be valid

Pre-deploy

npm login

Login into NPM.

Deploy

Change package.json version

npm run deploy

Compile the typescript project into javascript on destination folder and publish package on NPM

Documentation

Installation

npm install @guilhermenicolini/core-validators@latest

Usage

ValidationBuilder

  import { ValidationBuilder as Builder } from '@guilhermenicolini/core-validators'

  const validators = [
    ...Builder.of({ fieldName: 'id', value: 'my-id' }).required().uuid().build(),
    ...Builder.of({ fieldName: 'name', value: 'John Doe' }).required().build()
  ]

ValidationComposite

  import { Validator, ValidationComposite as Composite } from '@guilhermenicolini/core-validators'

  validate (validators: Validator[]): Error | undefined {
    return new Composite(validators).validate()
  }

Available Validators

Required (RequiredValidator)

Validate if value has value

  import { ValidationBuilder as Builder } from '@guilhermenicolini/core-validators'

  Builder.of('name', 'John Doe').required().build()

RequiredIf (RequiredIfValidator)

Validate if value has value based on a condition

  import { ValidationBuilder as Builder } from '@guilhermenicolini/core-validators'

  Builder.of('lastname', 'Doe').requiredIf(name?.length > 0).build()

Uuid (UuidValidator)

Validate if value is a valid uuidv4

  import { ValidationBuilder as Builder } from '@guilhermenicolini/core-validators'

  Builder.of('id', 'g5234234-2345234-343').uuid().build()

Enum (EnumValidator)

Validate if value is a valid enum value

  import { ValidationBuilder as Builder } from '@guilhermenicolini/core-validators'

  Builder.of('status', 'active').enum(StatusEnum).build()

Subdomain (SubDomainValidator)

Validate if value is a valid subdomain name

import { ValidationBuilder as Builder } from '@guilhermenicolini/core-validators'

Builder.of('subdomain', 'www').subdomain().build()

Array (ArrayValidator)

Validate if value is a valid array with specific min length if necessary

import { ValidationBuilder as Builder } from '@guilhermenicolini/core-validators'

Builder.of('entries', []).array().build()

Number (NumberValidator)

Validate if value is a number type

import { ValidationBuilder as Builder } from '@guilhermenicolini/core-validators'

Builder.of('value', 123).number().build()

Max (MaxLengthValidator)

Validate if value has a max length

import { ValidationBuilder as Builder } from '@guilhermenicolini/core-validators'

Builder.of('value', 'text').max(8).build()
Builder.of('value', 123).max(100).build()

Min (MinLengthValidator)

Validate if value has a min length

import { ValidationBuilder as Builder } from '@guilhermenicolini/core-validators'

Builder.of('value', 'text').min(8).build()
Builder.of('value', 123).min(100).build()

Regex (RegexValidator)

Validate if value matches a regex

import { ValidationBuilder as Builder } from '@guilhermenicolini/core-validators'

Builder.of('value', '123').regex(/[a-z]/, 'must have at least one lower case character').build()

Email (EmailValidator)

Validate if value is a valid e-mail

import { ValidationBuilder as Builder } from '@guilhermenicolini/core-validators'

Builder.of('value', '[email protected]').email().build()

SameAs (SameAsValidator)

Validate if values are the same

import { ValidationBuilder as Builder } from '@guilhermenicolini/core-validators'

Builder.of('value', '123').sameAs('456').build()

External (ExternalValidator)

Validate using an external validation

import { ValidationBuilder as Builder, MobileValidation } from '@guilhermenicolini/core-validators'

Builder.of('value', '123').external(new MobileValidation()).build()

Password (PasswordValidator)

Validate if value is password

import { ValidationBuilder as Builder } from '@guilhermenicolini/core-validators'

Builder.of('value', '123').password().build()

Options:

• min: minimal value length, default is 8
• lowercase: at least one lowercase character, default is true
• uppercase: at least one uppercase character, default is true
• numeric: at least one numeric character, default is true

Cpf (CpfValidator)

Validate if value is CPF

import { ValidationBuilder as Builder } from '@guilhermenicolini/core-validators'

Builder.of('value', '123').cpf().build()

Cnpj (CnpjValidator)

Validate if value is CNPJ

import { ValidationBuilder as Builder } from '@guilhermenicolini/core-validators'

Builder.of('value', '123').cnpj().build()

CpfCnpj (CpfCnpjValidator)

Validate if value is CPF or CNPJ

import { ValidationBuilder as Builder } from '@guilhermenicolini/core-validators'

Builder.of('value', '123').cpfcnpj().build()

Available Validations

MobileValidation

Check if value is a mobile phone with country code

  import { MobileValidation } from '@guilhermenicolini/core-validators'

  const mob = new MobileValidation()
  mob.isValid('+5511998765432')

UrlValidation

Check if value is a valid url

  import { UrlValidation } from '@guilhermenicolini/core-validators'

  const url = new UrlValidation()
  url.isValid('https://domain.com')

Available Errors

RequiredFieldError

  import { RequiredFieldError } from '@guilhermenicolini/core-validators'

  throw new RequiredFieldError('name')

InvalidFieldError

  import { InvalidFieldError } from '@guilhermenicolini/core-validators'

  throw new InvalidFieldError('name')

Available Interfaces

Validator

Create custom validators

  import { Validator, InvalidFieldError } from '@guilhermenicolini/core-validators'

  export  class  TestValidator  implements  Validator {
    constructor (
    readonly  fieldName: string,
    readonly  value?: any
    ) {}

    validate (): Error | undefined {
      if (this.value !== 'test') {
        return new InvalidFieldError(this.fieldName)
      }
    }
  }

Validation

Create custom validation to use with external libraries

  import { Validation, InvalidFieldError } from '@guilhermenicolini/core-validators'
  import { isEmail } from 'validator'

  export  class  EmailValidation  implements  Validation {
    constructor (
    readonly  fieldName: string,
    readonly  value?: any
    ) {}

    isValid (): boolean {
      return isEmail(this.value)
    }
  }

Principles

• Single Responsability Principle (SRP)
• Open Closed Principle (OCP)
• Liskov Substitution Principle (LSP)
• Interface Segregation Principle (ISP)
• Dependency Inversion Principle (DIP)
• Separation of Concerns (SOC)
• Don't Repeat Yourself (DRY)
• You Aren't Gonna Need It (YAGNI)
• Keep It Simple, Silly (KISS)
• Composition Over Inheritance

Design Patterns

• Composite
• Builder
• Dependency Injection

Methodologies

• TDD
• Clean Architecture
• DDD

###Libraries and Tools

• Typescript
• Jest
• Eslint
• Husky
• Validator