feat(KAN-52): add server selection and isolated native sessions

native/ui/index.html

@@ -14,8 +14,19 @@
             <p class="eyebrow" data-i18n="appName"></p>
             <h1 data-i18n="title"></h1>
             <p class="description" data-i18n="description"></p>
-            <a class="open-workspace" href="https://kanbangit.de/" data-i18n="openWorkspace"></a>
-            <p class="server">kanbangit.de</p>
+            <form id="server-form" novalidate>
+                <label for="server-url" data-i18n="serverLabel"></label>
+                <input id="server-url" type="url" inputmode="url" autocomplete="url" spellcheck="false" aria-describedby="server-help connection-status" value="https://kanbangit.de/" required />
+                <p id="server-help" class="description" data-i18n="serverHelp"></p>
+                <button class="open-workspace" type="submit" data-i18n="openWorkspace"></button>
+            </form>
+            <p id="connection-status" class="description" role="status" aria-live="polite"></p>
+            <div id="switch-confirmation" hidden>
+                <p class="description" data-i18n="switchWarning"></p>
+                <button id="confirm-switch" type="button" data-i18n="confirmSwitch"></button>
+                <button id="cancel-switch" type="button" data-i18n="cancel"></button>
+            </div>
+            <button id="resume" type="button" data-i18n="resume" hidden></button>
             <label class="appearance">
                 <span data-i18n="appearance"></span>
                 <select id="appearance">

native/ui/locales/en.js

@@ -1,8 +1,27 @@
 export const en = {
     appName: 'KanbanGit',
-    title: 'Your workspace, one click away.',
-    description: 'Open your projects and keep work moving.',
+    title: 'Choose your workspace.',
+    description: 'Connect to your KanbanGit installation over HTTPS.',
+    serverLabel: 'Server address',
+    serverHelp:
+        'Use the installation address without login details, a query or a fragment.',
     openWorkspace: 'Open workspace',
+    retry: 'Try again',
+    resume: 'Return to workspace',
+    switchWarning:
+        'Switching servers closes the current workspace and discards unsaved inputs. You will sign in separately on the new server.',
+    confirmSwitch: 'Switch server',
+    cancel: 'Cancel',
+    idle: '',
+    connecting: 'Connecting to your server…',
+    connected:
+        'Your workspace is open. Use KanbanGit → Server settings to change servers.',
+    connectionError:
+        'The server did not finish loading. Check your connection, server address and HTTPS certificate, then try again. An already open workspace and its inputs are kept.',
+    invalidServer:
+        'Enter a valid HTTPS installation address without login details, a query or a fragment.',
+    storageError:
+        'The server setting could not be read or saved. Check your local storage permissions and try again.',
     appearance: 'Appearance',
     system: 'System',
     light: 'Light',

native/ui/main.js

@@ -1,9 +1,87 @@
 import { en } from './locales/en.js';
+import { normalizeServer, needsConfirmation } from './server.js';
 
 for (const element of document.querySelectorAll('[data-i18n]')) {
     element.textContent = en[element.dataset.i18n];
 }
 
+const form = document.querySelector('#server-form');
+const input = document.querySelector('#server-url');
+const status = document.querySelector('#connection-status');
+const open = document.querySelector('.open-workspace');
+const resume = document.querySelector('#resume');
+const confirmation = document.querySelector('#switch-confirmation');
+let activeServer = null;
+let pendingServer = null;
+let initialized = false;
+
+function action(name, server) {
+    const url = new URL(`/action/${name}`, location.href);
+    if (server) {
+        url.searchParams.set('server', server);
+    }
+    location.href = url.href;
+}
+
+window.updateLauncher = (query) => {
+    const state = new URLSearchParams(query);
+    const phase = state.get('phase');
+    const server = state.get('server');
+    if (!initialized) {
+        input.value = server;
+        initialized = true;
+    }
+    if (phase === 'connecting' || phase === 'connected') {
+        activeServer = server;
+    }
+    status.textContent = en[phase] ?? '';
+    status.dataset.state = phase;
+    open.disabled = phase === 'connecting';
+    open.textContent =
+        en[phase === 'connectionError' ? 'retry' : 'openWorkspace'];
+    resume.hidden = state.get('ready') !== 'true';
+    form.setAttribute('aria-busy', String(phase === 'connecting'));
+};
+
+function connect(server) {
+    confirmation.hidden = true;
+    pendingServer = null;
+    action('open', server);
+}
+
+form.addEventListener('submit', (event) => {
+    event.preventDefault();
+    let server;
+    try {
+        server = normalizeServer(input.value);
+    } catch {
+        status.textContent = en.invalidServer;
+        input.setAttribute('aria-invalid', 'true');
+        input.focus();
+        return;
+    }
+    input.removeAttribute('aria-invalid');
+    if (needsConfirmation(activeServer, server)) {
+        pendingServer = server;
+        confirmation.hidden = false;
+        document.querySelector('#confirm-switch').focus();
+        return;
+    }
+    connect(server);
+});
+
+document.querySelector('#confirm-switch').addEventListener('click', () => {
+    if (pendingServer) {
+        connect(pendingServer);
+    }
+});
+document.querySelector('#cancel-switch').addEventListener('click', () => {
+    confirmation.hidden = true;
+    pendingServer = null;
+    input.focus();
+});
+resume.addEventListener('click', () => action('resume'));
+
 document.querySelector('#appearance').addEventListener('change', (event) => {
     document.documentElement.dataset.appearance = event.target.value;
 });

native/ui/server.js

@@ -0,0 +1,33 @@
+export function normalizeServer(input) {
+    const value = input.trim();
+    if (
+        !/^https:\/\//i.test(value) ||
+        [...value].some(
+            (character) =>
+                character.charCodeAt(0) < 32 ||
+                character.charCodeAt(0) === 127 ||
+                character === '\\',
+        )
+    ) {
+        throw new Error('invalidServer');
+    }
+    const url = new URL(value);
+    if (
+        url.protocol !== 'https:' ||
+        !url.hostname ||
+        url.username ||
+        url.password ||
+        value.includes('?') ||
+        value.includes('#')
+    ) {
+        throw new Error('invalidServer');
+    }
+    if (!url.pathname.endsWith('/')) {
+        url.pathname += '/';
+    }
+    return url.href;
+}
+
+export function needsConfirmation(activeServer, nextServer) {
+    return activeServer !== null && activeServer !== nextServer;
+}

native/ui/styles.css

@@ -125,3 +125,56 @@ select {
     color: inherit;
     background: var(--control);
 }
+
+[hidden] {
+    display: none !important;
+}
+
+form {
+    margin-top: 24px;
+}
+
+label {
+    font-size: 14px;
+    font-weight: 600;
+}
+
+input,
+button {
+    min-height: 44px;
+    padding: 10px 12px;
+    border: 1px solid var(--border);
+    border-radius: 4px;
+    font: inherit;
+    color: var(--foreground);
+    background: var(--control);
+}
+
+input {
+    display: block;
+    width: 100%;
+    margin-top: 8px;
+    font-size: 16px;
+}
+
+button {
+    cursor: pointer;
+}
+
+button:disabled {
+    cursor: wait;
+    opacity: 0.65;
+}
+
+.open-workspace {
+    width: 100%;
+    border: 0;
+    margin-top: 16px;
+}
+
+#switch-confirmation {
+    border: 1px solid var(--border);
+    border-radius: 4px;
+    padding: 12px;
+    margin-bottom: 16px;
+}