script.js

// arrays of lowercase, uppercase, numeric, and special characters
var generateBtn = document.querySelector("#generate");
var lowerCaseChar = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"];
var upperCaseChar = ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"];
var numericChar = ["1", "2", "3", "4", "5", "6", "7", "8", "9", "0"];
var specialChar = ["!", "@", "#", "$", "%", "^", "&", "*", "(", ")"];
var passwordChar = [];
console.log(passwordChar)

// getPasswordOptions prompts for password rules
function getPasswordOptions() {
    var length = parseInt(prompt("Enter a number between 8 and 128"));

    if (isNaN(length) === true) {
        alert("Has to be an actual number!  Try again.");
        return;
    }

    if (isNaN(length) || length < 8 || length > 128) {
        alert("Between 8 and 128!  Try again.");
        return;
    }
    //what input is the user giving
    var includesLC = confirm("Include Lower Case?");
    console.log(includesLC)
    var includesUC = confirm("Include Upper Case?");
    var includesNC = confirm("Include Numbers?");
    var includesSC = confirm("Include Special Characters?");
    //what if the user violates conditions?
    if (includesLC === false && includesUC === false && includesNC === false && includesSC === false) {
        alert("You have to choose something!  Try again.");
        return;
    }

    // passwordEL packages up the complete ruleset
    var passwordEl = {
        length: length,
        includesLC: includesLC,
        includesUC: includesUC,
        includesNC: includesNC,
        includesSC: includesSC
    };
    return passwordEl;
}

// creates a function (randomPW) from a random array based on the selected length
function randomPW(arr) {
    var randomPW = Math.floor(Math.random() * arr.length);
    var randomPWthePW = arr[randomPW];
    return randomPWthePW;
}

// function generates password with user input and using randomPW
function generatePassword() {
    var options = getPasswordOptions();
    var thePW = [];
    console.log(thePW)
    var anyChar = [];
    var theChar = [];
    //includeslower case letters;
    if (options.includesLC) {
        anyChar = anyChar.concat(lowerCaseChar);
        theChar.push(randomPW(lowerCaseChar));
    }
    //include upper case letters;
    if (options.includesUC) {
        anyChar = anyChar.concat(upperCaseChar);
        theChar.push(randomPW(upperCaseChar));
    }
    //doe it include numbers;
    if (options.includesNC) {
        anyChar = anyChar.concat(numericChar);
        theChar.push(randomPW(numericChar));
    }
    //does it include special characters;
    if (options.includesSC) {
        anyChar = anyChar.concat(specialChar);
        theChar.push(randomPW(specialChar));
    }

    for (var i = 0; i < options.length; i++) {
        var allChar = randomPW(anyChar);
        thePW.push(allChar);
    }
    return thePW.join("");
}
//this generates the button
var generateBtn = document.querySelector("#generate");
//creates the password shown in textbox
function writePassword() {
    var password = generatePassword();
    var passwordText = document.querySelector("#password");
    //console.log(1);
    passwordText.value = password;
}
//add event listener to generate button;
generateBtn.addEventListener("click", writePassword);