Git branch flow improvements (#370)

src-web/components/git/credentials.tsx

@@ -0,0 +1,50 @@
+import { showPromptForm } from '../../lib/prompt-form';
+import { Banner } from '../core/Banner';
+import { InlineCode } from '../core/InlineCode';
+
+export interface GitCredentials {
+  username: string;
+  password: string;
+}
+
+export async function promptCredentials({
+  url: remoteUrl,
+  error,
+}: {
+  url: string;
+  error: string | null;
+}): Promise<GitCredentials | null> {
+  const isGitHub = /github\.com/i.test(remoteUrl);
+  const userLabel = isGitHub ? 'GitHub Username' : 'Username';
+  const passLabel = isGitHub ? 'GitHub Personal Access Token' : 'Password / Token';
+  const userDescription = isGitHub ? 'Use your GitHub username (not your email).' : undefined;
+  const passDescription = isGitHub
+    ? 'GitHub requires a Personal Access Token (PAT) for write operations over HTTPS. Passwords are not supported.'
+    : 'Enter your password or access token for this Git server.';
+  const r = await showPromptForm({
+    id: 'git-credentials',
+    title: 'Credentials Required',
+    description: error ? (
+      <Banner color="danger">{error}</Banner>
+    ) : (
+      <>
+        Enter credentials for <InlineCode>{remoteUrl}</InlineCode>
+      </>
+    ),
+    inputs: [
+      { type: 'text', name: 'username', label: userLabel, description: userDescription },
+      {
+        type: 'text',
+        name: 'password',
+        label: passLabel,
+        description: passDescription,
+        password: true,
+      },
+    ],
+  });
+  if (r == null) return null;
+
+  const username = String(r.username || '');
+  const password = String(r.password || '');
+  return { username, password };
+}