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David Flick - Technical Interview - Username and Password

by David Lomneck

HTML

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.4/semantic.min.css">
<div class="ui container">
  <div class="ui form error">
    <div class="field error">
      <label>Username</label>
      <input type="text" placeholder="Username" id="inputUsername">
    </div>
    <div class="field error">
      <label>Password</label>
      <input type="text" placeholder="Password" id="inputPassword">
    </div>
    <div class="ui error message">
      <div class="header">Something is invalid...</div>
      <p id="errorMessage"></p>
    </div>
  </div>
</div>

JavaScript

//
// Complete implementations of the validateUsername and validatePassword functions
// throwing errors when invalid. You may use: https://developer.mozilla.org if you need help with syntax
// https://getfirebug.com/firebug-lite-debug.js as external resource for a build-in console window


// A valid username is at least 6 characters long
// A valid username cannot be longer than 20 characters
function validateUsername(username) {
  //Split username into an array.
  //check length of username of array
  //compare to boundries
	var withInRange = checkLengths(username, 6, 20);
  if (!withInRange) {
    throw 'Username is not valid!';
  }

}


// A Valid password must be at least 8 characters long
// A Valid password cannot be longer than 30 characters
// A valid password must contain at least 1 number
// A valid password must contain at least 1 UPPER case letter and 1 lower case letter
function validatePassword(password) {
  var passwordArr = password.split('');
  var passLength = passwordArr.length;
  var withInLength = checkLengths(password, 8, 30);
  var containsNumber = false;
  var isLower = false;
  var isUpper = false;
  passwordArr.forEach(char => {
    if (/[0-9]/g.test(char)) {
      containsNumber = true;
    } else if(/[a-z]/g.test(char)) {
        isLower = true;
    } else if(/[A-Z]/g.test(char)){
    	 isUpper = true;
    }
  });
  if (!withInLength || !containsNumber || !isLower || !isUpper) {
    throw 'Password is not valid!';
  }
}

function checkLengths(str,len1, len2){
	if(str.length < len1 || str.length > len2){
  	return false;
  }
  return true;
}



// You can ignore everything below this comment
(function() {
  var elements = {
    username: document.getElementById('inputUsername'),
    password: document.getElementById('inputPassword'),
    errorMessage: document.getElementById('errorMessage'),
    form: document.getElementsByClassName('ui form')[0]
  };
  var errors = {};

  wireup(elements.username, validateUsername);
 ...