[feature] Nicer login.html page, with cute styling + link to source code (#19)

Fixes #9

- Cute styling, combination of Mastodon and GTS
- Short description of the project
- Error and status messages (temporarily) appear in disabled button with correct ARIA attributes
- Sufficient contrast (WCAG AAA)

Let me know if using `login.scss` both as an index file and for adding custom styling is okay. I figured this might be preferred over creating an extra folder and file.

Reviewed-on: https://codeberg.org/superseriousbusiness/masto-fe-standalone/pulls/19
Co-authored-by: vyxen <vyxen@tutamail.com>
Co-committed-by: vyxen <vyxen@tutamail.com>

app/javascript/flavours/glitch/packs/login.js

@@ -0,0 +1,8 @@
+import 'packs/public-path';
+import { start } from '@rails/ujs';
+import 'flavours/glitch/styles/login.scss';
+
+start();
+
+//  This ensures that webpack compiles our images.
+require.context('../images', true);

app/javascript/flavours/glitch/styles/login.scss

@@ -0,0 +1,118 @@
+@import 'variables';
+@import 'styles/fonts/roboto';
+@import 'styles/fonts/roboto-mono';
+@import 'reset';
+@import 'basics';
+
+body {
+    height: 100vh;
+
+    a {
+        color: #89caff;
+    }
+}
+
+.login-container {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    height: 100%;
+    max-width: 30rem;
+    padding: 1rem;
+    margin: auto;
+    box-sizing: border-box;
+}
+
+header {
+    display: flex;
+    justify-content: center;
+    margin-bottom: 1rem;
+}
+
+.mascot {
+    height: 10rem;
+}
+
+main {
+    display: flex;
+    position: relative;
+    flex-direction: column;
+    row-gap: 10px;
+}
+
+.login {
+    display: flex;
+    position: relative;
+    column-gap: 10px;
+}
+
+.instance {
+    background: #282c37;
+    border: 0;
+    border-radius: 4px;
+    box-shadow: none;
+    box-sizing: border-box;
+    color: #9baec8;
+    display: block;
+    font-family: inherit;
+    font-size: 16px;
+    line-height: 18px;
+    margin: 0;
+    outline: 0;
+    padding: 15px;
+    padding-inline-end: 30px;
+    width: 100%;
+}
+
+.button {
+    display: flex;
+    column-gap: .5rem;
+    align-items: center;
+    justify-content: center;
+    background-color: #66befe;
+    border: 0 none;
+    border-radius: 4px;
+    box-sizing: border-box;
+    color: #2a2b2f;
+    cursor: pointer;
+    font-size: 16px;
+    letter-spacing: 0;
+    line-height: 22px;
+    font-family: inherit;
+    font-weight: 500;
+    padding: 7px 10px;
+    position: relative;
+    text-align: center;
+    text-decoration: none;
+    white-space: nowrap;
+    flex-basis: auto;
+
+    &:hover {
+        background-color: #89caff;
+    }
+
+    &:disabled {
+        background-color: #9baec8;
+        cursor: default;
+    }
+}
+
+.content {
+    background-color: #444b5d;
+    padding: 15px;
+    font-size: 1rem;
+    line-height: 1.5rem;
+    border-radius: 4px;
+    display: flex;
+    flex-direction: column;
+    row-gap: .75rem;
+}
+
+.link-footer {
+    padding: 10px;
+
+    p, a {
+        color: #97A8B4;
+    }
+}

app/javascript/flavours/glitch/theme.yml

@@ -16,6 +16,9 @@ pack:
       - flavours/glitch/async/getting_started
       - flavours/glitch/async/home_timeline
       - flavours/glitch/async/notifications
+  login:
+    filename: packs/login.js
+    stylesheet: true
   mailer:
   modal:
   public: packs/public.jsx

public/auth.js

@@ -30,7 +30,9 @@ async function auth() {
   
   const domain = matches[2];
   if (!domain) {
-    setMessage('Invalid instance', false);
+    setMessage('Invalid instance', true);
+    await new Promise(r => setTimeout(r, 2000));
+    setMessage('Authorize', false, false);
     return;
   }
   localStorage.setItem('domain', domain);
@@ -92,7 +94,6 @@ async function getToken(code, domain) {
   formData.append('scope', 'read write follow push');
   formData.append('redirect_uri', document.location.origin + document.location.pathname);
 
-
   // eslint-disable-next-line promise/catch-or-return
   return fetch(tokenUrl, {
     method: 'POST',
@@ -108,7 +109,14 @@ async function getToken(code, domain) {
     });
 }
 
-function setMessage(message, disabled = true) {
+function setMessage(message, error = false, disabled = true) {
+  document.getElementById('message').setAttribute('role', 'status');
   document.getElementById('message').textContent = message;
   document.getElementById('btn').disabled = disabled;
+
+  if (!error) return;
+
+  const instance = document.getElementById('instance');
+  instance.setAttribute('aria-invalid', true);
+  instance.setAttribute('aria-describedby', 'message');
 }

public/login.html

@@ -1,13 +1,50 @@
 <!DOCTYPE html>
 <html lang="en">
+
 <head>
     <meta charset="UTF-8">
     <title>Login | Masto-FE (🦥 flavour)</title>
+    <meta content="width=device-width, initial-scale=1" name="viewport">
+    <link rel="stylesheet" media="all" href="/packs/css/core/common.css" />
+    <link rel="stylesheet" media="all" href="/packs/css/flavours/glitch/login.css" />
     <script src="/auth.js"></script>
 </head>
+
 <body>
-<input type="text" id="instance" placeholder="yourinstance.tld">
+    <div class="login-container">
-<button onclick="auth()" id="btn">Log in</button>
+        <header>
-<span id="message"></span>
+            <img class="mascot" alt src="images/mascot.svg" />
+        </header>
+        <main>
+            <div class="login">
+                <input class="instance" id="instance" placeholder="Instance URL" aria-label="Instance URL" value="" onkeypress="if (event.keyCode == 13) auth()">
+                <button type="submit" class="button" id="btn" onclick="auth()">
+                    <span id="message">Authorize</span>
+                </button>
+            </div>
+            <div class="content">
+                <p>
+                    This is a standalone version of the Mastodon front-end that offers compatibility with GoToSocial instances. It is based
+                    on <a href="https://iceshrimp.dev/iceshrimp/masto-fe-standalone" rel="nofollow">Iceshrimp's Masto-FE Standalone</a>,
+                    which is itself a fork of <a href="https://github.com/glitch-soc/mastodon" rel="nofollow">Mastodon Glitch Edition</a>,
+                    which in turn forks <a href="https://github.com/mastodon/mastodon/" rel="nofollow">Mastodon</a>. Phew!
+                </p>
+                <p>
+                    The application is completely client-side, meaning everything happens in the browser on your machine. It does not store
+                    information anywhere else than your browser's local storage.
+                </p>
+            </div>
+        </main>
+        <footer class="link-footer">
+            <p>
+                <strong>Masto-FE (🦥 flavour)</strong>
+                <span aria-hidden="true"> · </span>
+                <a href="https://codeberg.org/superseriousbusiness/masto-fe-standalone" rel="noopener noreferrer" target="_blank">
+                    Source code
+                </a>
+            </p>
+        </footer>
+    </div>
 </body>
+
 </html>