/* You could seperate this into multiple files for more modularity */

/* Using the getMatchCount helps to avoid multiple matches also being valid - Not typically necessary, just personal preference */

const getMatchCount = (str, reg) => ((str || '').match(reg) || []).length;

const name = (str) => getMatchCount(str, /^[A-Za-z ]{6,30}$/) === 1;
const phoneNumber = (str) => getMatchCount(str, /^[0-9]{10}$/) === 1;

const validateString = {
  name,
  phoneNumber,
};

/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */

const validate = (object, schema) => {
  const oKeys = Object.keys(object);
  const sKeys = Object.keys(schema);

  if(oKeys.length !== sKeys.length) return false;

  let result = true;
  for(let i = 0; i < sKeys.length; i++) {
    const sKey = sKeys[i];
    const oKey = oKeys[i];
    if(!schema[sKey](object[oKey])) {
      result = false;
      break;
    }
  }
  return result;
};

/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */

const info = {
  name: "John Doe",
  phone: "4792258422"
};

const schema = {
  name: validateString.name,
  phone: validateString.phoneNumber
};

const isValid = validate(info, schema);

console.log(isValid);