From 8af23ff155904ba78de61a3cdab33a048a0f5664 Mon Sep 17 00:00:00 2001
From: lonkaars <loek@pipeframe.xyz>
Date: Sat, 27 May 2023 14:21:25 +0200
Subject: validate register info client-side

---
 public/global.css   |  6 ++++
 public/login.php    |  4 +--
 public/register.css | 93 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 public/register.js  | 83 +++++++++++++++++++++++++++++++++++++++++++++++
 public/register.php | 34 +++++++++++++++++---
 5 files changed, 214 insertions(+), 6 deletions(-)
 create mode 100644 public/register.css
 create mode 100644 public/register.js

diff --git a/public/global.css b/public/global.css
index a417d10..1683ef5 100644
--- a/public/global.css
+++ b/public/global.css
@@ -54,6 +54,12 @@ body, html {
 	border-radius: 8px;
 	border: none;
 	background-color: var(--bg-alt);
+	transition: opacity .3s;
+}
+.button[disabled],
+.buttonstyle[disabled] {
+	opacity: 0.4;
+	cursor: not-allowed !important;
 }
 
 .button {
diff --git a/public/login.php b/public/login.php
index 19d9d17..7b1a254 100644
--- a/public/login.php
+++ b/public/login.php
@@ -23,9 +23,9 @@ do {
 		<div class="modal">
 			<form action="/login.php" method="post">
 				<label for="username">Gebruikersnaam</label>
-				<input id="username" name="username" type="text" placeholder="gebruikersnaam" class="buttonstyle">
+				<input id="username" name="username" type="text" placeholder="gebruikersnaam" class="buttonstyle" autocomplete="username" autofocus>
 				<label for="password">Wachtwoord</label>
-				<input id="password" name="password" type="password" placeholder="wachtwoord" class="buttonstyle">
+				<input id="password" name="password" type="password" placeholder="wachtwoord" class="buttonstyle" autocomplete="current-password">
 				<input type="submit" value="Inloggen" class="button filled">
 			</form>
 			<span class="register">Of <a href="/register.php">een nieuw account maken</a></span>
diff --git a/public/register.css b/public/register.css
new file mode 100644
index 0000000..eef7490
--- /dev/null
+++ b/public/register.css
@@ -0,0 +1,93 @@
+.check-popup {
+	transition-property: margin, box-shadow;
+	transition-duration: .3s;
+	background-color: var(--bg-alt);
+	position: relative;
+	margin-bottom: 16px;
+	border-radius: 8px;
+	box-shadow: 0px 8px 32px -16px #0004;
+}
+
+.check-popup::before {
+	transition: opacity .3s;
+	content: "";
+	position: absolute;
+	top: 0;
+	left: 50%;
+	background-color: var(--bg-alt);
+	width: 16px;
+	height: 16px;
+	transform: translate(-50%, -50%) rotate(-45deg);
+}
+
+.requirements {
+	display: grid;
+	list-style: none;
+}
+
+.requirements .requirement {
+	transition-property: opacity;
+	transition-duration: .3s;
+	opacity: calc(100% - 50% * var(--done));
+	--done: 0;
+}
+
+.requirements .requirement .inner {
+	position: relative;
+}
+
+.requirements .requirement .inner::before {
+	content: "- ";
+	position: absolute;
+	left: -0.5em;
+	transform: translateX(-100%);
+}
+
+.requirements .requirement .inner::after {
+	transition-property: width;
+	transition-duration: .3s;
+	content: "";
+	position: absolute;
+	top: 50%;
+	left: 0;
+	width: calc(100% * var(--done));
+	background-color: currentColor;
+	height: 2px;
+}
+
+.requirements.len-3 .requirement.len-3,
+.requirements.nosymbol .requirement.nosymbol,
+.requirements.nospace .requirement.nospace,
+.requirements.valid .requirement.valid,
+.requirements.len-8 .requirement.len-8,
+.requirements.digit-2 .requirement.digit-2,
+.requirements.symbol-2 .requirement.symbol-2,
+.requirements.has-uppercase .requirement.has-uppercase,
+.requirements.has-lowercase .requirement.has-lowercase
+{ --done: 1; }
+
+#username-requirements { --requirement-count: 3; }
+#email-requirements { --requirement-count: 1; }
+#password-requirements { --requirement-count: 5; }
+.check-popup .requirements {
+	--requirement-count: 0; /* TODO: this should dynamically change */
+	transition-property: margin, opacity, grid-template-rows;
+	transition-duration: .3s;
+	grid-template-rows: repeat(var(--requirement-count), 1fr);
+	overflow: hidden;
+}
+
+.check-popup .requirements .requirement {
+	min-height: 0;
+}
+
+.check-popup.all .requirements {
+	margin: 0;
+	opacity: 0;
+	grid-template-rows: repeat(var(--requirement-count), 0fr);
+}
+.check-popup.all {
+	margin: 0;
+	box-shadow: none;
+}
+.check-popup.all::before { opacity: 0; }
diff --git a/public/register.js b/public/register.js
new file mode 100644
index 0000000..d3b66e1
--- /dev/null
+++ b/public/register.js
@@ -0,0 +1,83 @@
+function checkUsername() {
+	var username = document.getElementById("username").value;
+	var requirements = document.getElementById("username-requirements");
+
+	var len3 = username.length >= 3;
+	var nosymbol = username.match(/["'<>/&:;\\|{}[\]()]/) == null;
+	var nospace = username.match(/[ ]/) == null;
+
+	requirements.classList[len3 ? "add" : "remove"]("len-3");
+	requirements.classList[nosymbol ? "add" : "remove"]("nosymbol");
+	requirements.classList[nospace ? "add" : "remove"]("nospace");
+
+	requirements.parentElement.classList.remove("all");
+	if (!len3) return false;
+	if (!nosymbol) return false;
+	if (!nospace) return false;
+	requirements.parentElement.classList.add("all");
+	return true;
+}
+
+function checkEmail() {
+	var email = document.getElementById("email").value;
+	var requirements = document.getElementById("email-requirements");
+
+	// e-mail addresses can really only be verified by attempting to send a mail
+	// to them, so this is pretty much useless for client-side anyways
+	var valid = email.match(/.+?@.+/) != null;
+
+	requirements.classList[valid ? "add" : "remove"]("valid");
+
+	requirements.parentElement.classList.remove("all");
+	if (!valid) return false;
+	requirements.parentElement.classList.add("all");
+	return true;
+}
+
+function checkPassword() {
+	var password = document.getElementById("password").value;
+	var requirements = document.getElementById("password-requirements");
+
+	var len8 = password.length >= 8;
+	var minnum2 = password.match(/[0-9]/g)?.length >= 2;
+	var minsym2 = password.match(/[!@#$%^&*()\-=_+[\]{}\\|;:'",<.>/?`~]/g)?.length >= 2;
+	var uppercase = password.match(/[A-Z]/) != null;
+	var lowercase = password.match(/[a-z]/) != null;
+
+	requirements.classList[len8 ? "add" : "remove"]("len-8");
+	requirements.classList[minnum2 ? "add" : "remove"]("digit-2");
+	requirements.classList[minsym2 ? "add" : "remove"]("symbol-2");
+	requirements.classList[uppercase ? "add" : "remove"]("has-uppercase");
+	requirements.classList[lowercase ? "add" : "remove"]("has-lowercase");
+
+	requirements.parentElement.classList.remove("all");
+	if (!len8) return false;
+	if (!minnum2) return false;
+	if (!minsym2) return false;
+	if (!uppercase) return false;
+	if (!lowercase) return false;
+	requirements.parentElement.classList.add("all");
+	return true;
+}
+
+function checkAllFields() {
+	var username = checkUsername();
+	var email = checkEmail();
+	var password = checkPassword();
+
+	if (!username) return false;
+	if (!email) return false;
+	if (!password) return false;
+	return true;
+}
+
+function updateRegisterButton() {
+	document.getElementById("register-submit").disabled = !checkAllFields();
+}
+
+// update when fields are changed
+document.getElementById("username").addEventListener("input", updateRegisterButton);
+document.getElementById("email").addEventListener("input", updateRegisterButton);
+document.getElementById("password").addEventListener("input", updateRegisterButton);
+
+updateRegisterButton();
diff --git a/public/register.php b/public/register.php
index f0f6596..0ef7e18 100644
--- a/public/register.php
+++ b/public/register.php
@@ -1,5 +1,6 @@
+<!DOCTYPE html>
 <?php include "../lib/login.php" ?>
-<?php // if_logged_in(true, "/") ?>
+<?php if_logged_in(true, "/") ?>
 <?php
 do {
 	if ($_SERVER['REQUEST_METHOD'] !== 'POST') break;
@@ -17,6 +18,8 @@ do {
 	<?php include 'head.php' ?>
 	<title>registeren</title>
 	<link rel='stylesheet' type='text/css' media='screen' href='login.css'>
+	<link rel='stylesheet' type='text/css' media='screen' href='register.css'>
+	<script defer src="register.js"></script>
 </head>
 <body>
 	<?php include 'navbar.php' ?>
@@ -25,10 +28,33 @@ do {
 		<div class="modal">
 			<form action="/register.php" method="post">
 				<label for="username">Gebruikersnaam</label>
-				<input id="username" name="username" type="text" placeholder="gebruikersnaam" class="buttonstyle">
+				<input id="username" name="username" type="text" placeholder="gebruikersnaam" class="buttonstyle" autocomplete="username" autofocus>
+				<div class="check-popup check-username">
+					<ul id="username-requirements" class="requirements">
+						<li class="requirement len-3"><span class="inner">Minimaal 3 letters lang</span></li>
+						<li class="requirement nosymbol"><span class="inner">Geen symbolen</span></li>
+						<li class="requirement nospace"><span class="inner">Geen spaties</span></li>
+					</ul>
+				</div>
+				<label for="username">E-mail adres</label>
+				<input id="email" name="email" type="text" placeholder="e-mail" class="buttonstyle" autocomplete="email">
+				<div class="check-popup check-email">
+					<ul id="email-requirements" class="requirements">
+						<li class="requirement valid"><span class="inner">Geldig e-mail adres</span></li>
+					</ul>
+				</div>
 				<label for="password">Wachtwoord</label>
-				<input id="password" name="password" type="password" placeholder="wachtwoord" class="buttonstyle">
-				<input type="submit" value="Registreren" class="button filled">
+				<input id="password" name="password" type="password" placeholder="wachtwoord" class="buttonstyle" autocomplete="new-password">
+				<div class="check-popup check-password">
+					<ul id="password-requirements" class="requirements">
+						<li class="requirement len-8"><span class="inner">Minimaal 8 tekens lang</span></li>
+						<li class="requirement digit-2"><span class="inner">Minimaal 2 cijfers</span></li>
+						<li class="requirement symbol-2"><span class="inner">Minimaal 2 symbolen</span></li>
+						<li class="requirement has-uppercase"><span class="inner">Bevat hoofdletter(s)</span></li>
+						<li class="requirement has-lowercase"><span class="inner">Bevat kleine letter(s)</span></li>
+					</ul>
+				</div>
+				<input id="register-submit" type="submit" value="Registreren" class="button filled">
 			</form>
 			<span class="register">Of <a href="/login.php">inloggen</a></span>
 		</div>
-- 
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