ElectronMCLauncher/app/login.ejs

<div id="loginContainer" style="display: none;">
    <div id="loginContent">
        <form id="loginForm" onsubmit="void(0); return false;">
            <img id="loginImageSeal" src="assets/images/WesterosSealCircle.png"/>
            <span class="loginSpan" id="loginSubheader">MEMBER LOGIN</span>
            <div class="loginFieldContainer">
                <svg id="profileSVG" class="loginSVG" viewBox="40 37 65.36 61.43">
                    <g>
                        <path d="M86.77,58.12A13.79,13.79,0,1,0,73,71.91,13.79,13.79,0,0,0,86.77,58.12M97,103.67a3.41,3.41,0,0,0,3.39-3.84,27.57,27.57,0,0,0-54.61,0,3.41,3.41,0,0,0,3.39,3.84Z"/>
                    </g>
                </svg>
                <span class="loginErrorSpan" id="loginEmailError">* Invalid Value</span>
                <input id="loginUsername" class="loginField" type="text" placeholder="EMAIL"/>
            </div>
            <div class="loginFieldContainer">
                <svg id="lockSVG" class="loginSVG" viewBox="40 32 60.36 70.43">
                    <g>
                        <path d="M86.16,54a16.38,16.38,0,1,0-32,0H44V102.7H96V54Zm-25.9-3.39a9.89,9.89,0,1,1,19.77,0A9.78,9.78,0,0,1,79.39,54H60.89A9.78,9.78,0,0,1,60.26,50.59ZM70,96.2a6.5,6.5,0,0,1-6.5-6.5,6.39,6.39,0,0,1,3.1-5.4V67h6.5V84.11a6.42,6.42,0,0,1,3.39,5.6A6.5,6.5,0,0,1,70,96.2Z"/>
                    </g>
                </svg>
                <span class="loginErrorSpan" id="loginPasswordError">* Required</span>
                <input id="loginPassword" class="loginField" type="password" placeholder="PASSWORD"/>
            </div>
            <div id="loginOptions">
                <span class="loginSpanDim">
                    <a href="https://help.mojang.com/customer/en/portal/articles/329524-change-or-forgot-password">forgot password?</a>
                </span>
                <label id="checkmarkContainer">
                    <input id="loginRememberOption" type="checkbox" checked>
                    <span id="loginRememberText" class="loginSpanDim">remember me?</span>
                    <span class="loginCheckmark"></span>
                </label>
            </div>
            <button id="loginButton" disabled>
                <div id="loginButtonContent">
                    LOGIN
                    <svg id="loginSVG" viewBox="0 0 24.87 13.97">
                        <defs>
                            <style>.arrowLine{fill:none;stroke:#FFF;stroke-width:2px;transition: 0.25s ease;}</style>
                        </defs>
                        <polyline class="arrowLine" points="0.71 13.26 12.56 1.41 24.16 13.02"/>
                    </svg>
                    <div class="circle-loader">
                        <div class="checkmark draw"></div>
                    </div>
                    <!--<div class="spinningCircle" id="loginSpinner"></div>-->
                </div>
            </button>
            <div id="loginDisclaimer">
                <span class="loginSpanDim" id="loginRegisterSpan">
                    <a href="https://minecraft.net/en-us/store/minecraft/">Need an Account?</a>
                </span>
                <p class="loginDisclaimerText">Your password is sent directly to mojang and never stored.</p>
                <p class="loginDisclaimerText">WesterosCraft is not affiliated with Mojang AB.</p>
            </div>
        </form>
    </div>
    <script type="application/javascript">
        //const validEmail = /^(([^<>()\[\]\.,;:\s@\"]+(\.[^<>()\[\]\.,;:\s@\"]+)*)|(\".+\"))@(([^<>()[\]\.,;:\s@\"]+\.)+[^<>()[\]\.,;:\s@\"]{2,})$/i
        
        // Validation Regexes.
        const validUsername = /^[a-zA-Z0-9_]{1,16}$/
        const basicEmail = /^\S+@\S+\.\S+$/

        // DOM cache.
        const loginContainer = document.getElementById('loginContainer')
        const loginErrorTitle = document.getElementById('loginErrorTitle')
        const loginErrorDesc = document.getElementById('loginErrorDesc')
        const loginErrorAcknowledge = document.getElementById('loginErrorAcknowledge')

        const loginEmailError = document.getElementById('loginEmailError')
        const loginUsername = document.getElementById('loginUsername')
        const loginPasswordError = document.getElementById('loginPasswordError')
        const loginPassword = document.getElementById('loginPassword')
        const checkmarkContainer = document.getElementById('checkmarkContainer')
        const loginRememberOption = document.getElementById('loginRememberOption')
        const loginButton = document.getElementById('loginButton')

        // Control variables.
        let lu = false, lp = false

        // Show error element.
        function showError(element, value){
            element.innerHTML = value
            element.style.opacity = 1
        }

        // Shake error element.
        function shakeError(element){
            if(element.style.opacity == 1){
                element.classList.remove('shake')
                void element.offsetWidth
                element.classList.add('shake')
            }
        }

        // Validate email field is neither empty nor invalid.
        function validateEmail(value){
            if(value){
                if(!basicEmail.test(value) && !validUsername.test(value)){
                    showError(loginEmailError, '* Invalid Value')
                    loginDisabled(true)
                    lu = false
                } else {
                    loginEmailError.style.opacity = 0
                    lu = true
                    if(lp){
                        loginDisabled(false)
                    }
                }
            } else {
                lu = false
                showError(loginEmailError, '* Required')
                loginDisabled(true)
            }
        }

        // Validate password field is not empty.
        function validatePassword(value){
            if(value){
                loginPasswordError.style.opacity = 0
                lp = true
                if(lu){
                    loginDisabled(false)
                }
            } else {
                lp = false
                showError(loginPasswordError, '* Required')
                loginDisabled(true)
            }
        }

        // Emphasize errors with shake when focus is lost.
        loginUsername.addEventListener('focusout', (e) => {
            validateEmail(e.target.value)
            shakeError(loginEmailError)
        })
        loginPassword.addEventListener('focusout', (e) => {
            validatePassword(e.target.value)
            shakeError(loginPasswordError)
        })

        // Validate input for each field.
        loginUsername.addEventListener('input', (e) => {
            validateEmail(e.target.value)
        })
        loginPassword.addEventListener('input', (e) => {
            validatePassword(e.target.value)
        })

        // Enable or disable login button.
        function loginDisabled(v){
            if(loginButton.disabled !== v){
                loginButton.disabled = v
            }
        }

        // Enable or disable loading elements.
        function loginLoading(v){
            if(v){
                loginButton.setAttribute('loading', v)
                loginButton.innerHTML = loginButton.innerHTML.replace('LOGIN', 'LOGGING IN')
            } else {
                loginButton.removeAttribute('loading')
                loginButton.innerHTML = loginButton.innerHTML.replace('LOGGING IN', 'LOGIN')
            }
        }

        // Disable or enable login form.
        function formDisabled(v){
            loginDisabled(v)
            loginUsername.disabled = v
            loginPassword.disabled = v
            if(v){
                checkmarkContainer.setAttribute('disabled', v)
            } else {
                checkmarkContainer.removeAttribute('disabled')
            }
            loginRememberOption.disabled = v
        }

        function resolveError(err){
            // Mojang Response => err.cause | err.error | err.errorMessage
            // Node error => err.code | err.message
            if(err.cause != null && err.cause === 'UserMigratedException') {
                return {
                    title: 'Error During Login:<br>Invalid Credentials',
                    desc: 'You\'ve attempted to login with a migrated account. Try again using the account email as the username.'
                }
            } else {
                if(err.error != null){
                    if(err.error === 'ForbiddenOperationException'){
                        if(err.errorMessage != null){
                            if(err.errorMessage === 'Invalid credentials. Invalid username or password.'){
                                return {
                                    title: 'Error During Login:<br>Invalid Credentials',
                                    desc: 'The email or password you\'ve entered is incorrect. Please try again.'
                                }
                            } else if(err.errorMessage === 'Invalid credentials.'){
                                return {
                                    title: 'Error During Login:<br>Too Many Attempts',
                                    desc: 'There have been too many login attempts with this account recently. Please try again later.'
                                }
                            }
                        }
                    }
                } else {
                    // Request errors (from Node).
                    if(err.code != null){
                        if(err.code === 'ENOENT'){
                            // No Internet.
                            return {
                                title: 'Error During Login:<br>No Internet Connection',
                                desc: 'You must be connected to the internet in order to login. Please connect and try again.'
                            }
                        } else if(err.code === 'ENOTFOUND'){
                            // Could not reach server.
                            return {
                                title: 'Error During Login:<br>Authentication Server Offline',
                                desc: 'Mojang\'s authentication server is currently offline or unreachable. Please wait a bit and try again. You can check the status of the server on <a href="https://help.mojang.com/">Mojang\'s help portal</a>.'
                            }
                        }
                    }
                }
            }
            if(err.message != null){
                // Unknown error with request.
                return {
                    title: 'Error During Login:<br>Unknown Error',
                    desc: err.message
                }
            } else {
                // Unknown Mojang error.
                return {
                    title: err.error,
                    desc: err.errorMessage
                }
            }
        }

        loginButton.addEventListener('click', () => {
            // Disable form.
            formDisabled(true)

            // Show loading stuff.
            loginLoading(true)

            AuthManager.addAccount(loginUsername.value, loginPassword.value).then((value) => {
                loginButton.innerHTML = loginButton.innerHTML.replace('LOGGING IN', 'SUCCESS')
                $('.circle-loader').toggleClass('load-complete')
                $('.checkmark').toggle()
                //console.log(value)
                setTimeout(() => {
                    $('#loginContainer').fadeOut(500, () => {
                        $('#landingContainer').fadeIn(500)
                    })
                }, 1000)
            }).catch((err) => {
                loginLoading(false)
                const errF = resolveError(err)
                setOverlayContent(errF.title, errF.desc, 'Try Again')
                setOverlayHandler(() => {
                    formDisabled(false)
                    toggleOverlay(false)
                })
                toggleOverlay(true)
                console.log(err)
            })

        })
    </script>
    <!-- Will reuse this down the line, then it will be removed from this file. -->
    <!--<div id="loginLoading">
        <div id="loginLoadingContent">
            <div id="loadSpinnerContainer">
                <img id="loadCenterImage" src="assets/images/westeroscraftlogo1.png">
                <img id="loadSpinnerImage" class="rotating" src="assets/images/westeroscraftlogo2.png">
            </div>
            <span id="loadDescText">LOGGING IN</span>
        </div>
    </div>-->
</div>