18F/cg-dashboard

const EMAIL_REGEX = /^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$/;

export function validateInteger(options) {
  const { max, min } = options || {};
  return function _validateInteger(text) {
    let value = text || "";
    if (!/^-?\d+$/.test(String(value).trim())) {
      return { message: "Invalid number", type: "NUMBER_INVALID" };
    }

    value = parseInt(text, 10);
    if (typeof value !== "number") {
      return { message: "Invalid number", type: "NUMBER_INVALID" };
    }

    if (Number.isNaN(value)) {
      return { message: "Invalid number", type: "NUMBER_INVALID" };
    }

    if (typeof min === "number" && value < min) {
      return { message: `Total must be ${min} or greater`, type: "NUMBER_MIN" };
    }

    if (typeof max === "number" && value > max) {
      return { message: `Total exceeds ${max}`, type: "NUMBER_MAX" };
    }

    return null;
  };
}

export function validateString() {
  return function _validateString(value, name) {
    if (!value || !value.length) {
      return {
        message: `The ${name || ""} field was not filled out`
      };
    }

    return null;
  };
}

export function validateEmail() {
  return function _validateEmail(value, name) {
    if (!EMAIL_REGEX.test(value)) {
      const nameString = name ? `in ${name} ` : "";
      return {
        message: `The value entered ${nameString}is not a valid e-mail address`
      };
    }

    return null;
  };
}