formValidationRules.js

export const passwordConfirmationRule = value => {
  let password = document.getElementById("password");
  return value === password.value
    ? false
    : "Password confirmation must match password.";
};

export const emailRule = value => {
  return /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(value) ? false : "Not a valid email.";
};

export const required = value => {
  return value.length > 0 ? true : false;
};

export const minimumCharacters = (value, target) => {
  return target <= value.length
    ? false
    : `Minimum length is ${target} characters.`;
};

export const minimumUpperCaseCharacters = (value, target) => {
  const valueArray = value.split("");
  const upperCases = valueArray.filter(
    char => /^[^a-z]*$/.test(char) && char
  );
  return upperCases.length >= target
    ? false
    : `Must contain at least ${target} uppercase characters.`;
};

export const minimumNumberCharacters = (value, target) => {
  const valueArray = value.split("");
  const numbers = valueArray.filter(char => char <= "9" && char >= "0" && char);
  return numbers.length >= target
    ? false
    : `Must contain at least ${target} numerical characters.`;
};