password.validator.ts

// password.validator.ts
import { FormControl } from '@angular/forms';

export interface ValidationResult {
  [key: string]: boolean;
}

export class PasswordValidator {
  public static strong(control: FormControl): ValidationResult {
    const hasNumber = /(?=\D*\d)/.test(control.value);
    const hasUpper = /(?=[^A-Z]*[A-Z])/.test(control.value);
    const hasLower = /(?=[^a-z]*[a-z])/.test(control.value);
    const minLength = /.{8,20}/.test(control.value);
    // console.log('Num, Upp, Low', hasNumber, hasUpper, hasLower);
    const valid = hasNumber && hasUpper && hasLower && minLength;
    if (!valid) {
      // return what´s not valid
      return { strong: true };
    }
    return null;
  }

  public static strongHasNumber(control: FormControl): ValidationResult {
    const hasNumber = /(?=\D*\d)/.test(control.value);
    const valid = hasNumber;
    if (!valid) {
      // return what´s not valid
      return { strongHasNumber: true };
    }
    return null;
  }

  public static strongHasUpper(control: FormControl): ValidationResult {
    const hasUpper = /(?=[^A-Z]*[A-Z])/.test(control.value);
    // console.log('Num, Upp, Low', hasNumber, hasUpper, hasLower);
    const valid = hasUpper;
    if (!valid) {
      // return what´s not valid
      return { strongHasUpper: true };
    }
    return null;
  }

  public static strongHasLower(control: FormControl): ValidationResult {
    const hasLower = /(?=[^a-z]*[a-z])/.test(control.value);
    // console.log('Num, Upp, Low', hasNumber, hasUpper, hasLower);
    const valid = hasLower;
    if (!valid) {
      // return what´s not valid
      return { strongHasLower: true };
    }
    return null;
  }

  public static strongMinLength(control: FormControl): ValidationResult {
    const minLength = /.{8,20}$/.test(control.value);
    // console.log('Num, Upp, Low', hasNumber, hasUpper, hasLower);
    const valid = minLength;
    if (!valid) {
      // return what´s not valid
      return { strongMinLength: true };
    }
    return null;
  }
}