validator.service.ts

validator.service.ts

import {Injectable} from '@angular/core';

@Injectable({
  providedIn: 'root'
})
export class ValidatorService {

  constructor() {
  }

  validateCpf(cpf: string): boolean {
    let soma;
    let resto;
    soma = 0;
    if (cpf === '00000000000') {
      return false;
    }
    let i = 0;
    for (i = 1; i <= 9; i++) {
      // tslint:disable-next-line:radix
      soma = soma + parseInt(cpf.substring(i - 1, i)) * (11 - i);
    }
    resto = (soma * 10) % 11;

    if ((resto === 10) || (resto === 11)) {
      resto = 0;
    }

    // tslint:disable-next-line:radix
    if (resto !== parseInt(cpf.substring(9, 10))) {
      return false;
    }

    soma = 0;
    for (i = 1; i <= 10; i++) {
      // tslint:disable-next-line:radix
      soma = soma + parseInt(cpf.substring(i - 1, i)) * (12 - i);
    }
    resto = (soma * 10) % 11;

    if ((resto === 10) || (resto === 11)) {
      resto = 0;
    }

    // tslint:disable-next-line:radix
    return resto === parseInt(cpf.substring(10, 11));
  }
}