Files
alpenwerk-hr/app/(auth)/login/page.tsx
Maximilian Stubhan d9367a8ce4 Form primitives, keyboard-operable comboboxes, dialog focus, route states
Accessibility work on the UI layer, all of it rooted in one structural gap:
there were no form primitives, so every field was hand-assembled and every
field got the same details wrong.

Form primitives
- components/ui/Field.tsx (Field/TextField/SelectField/TextareaField) and
  Button.tsx. Field generates the control id with useId and derives htmlFor
  from it, which is what makes the association impossible to omit rather
  than merely conventional.
- 92 labels existed, 4 used htmlFor, and no input carried an id at all: a
  screen reader announced an unnamed edit box and clicking a label focused
  nothing. Now every label resolves to its control (0 unassociated), and the
  input class chain that appeared verbatim 85 times appears zero times.
- Field also takes a render prop, so Lookup, CountryPicker and Picklist get
  the same wiring instead of a second, partial solution.
- SearchInput replaces three hand-rolled copies of the icon-in-a-box search
  whose input had only a placeholder — not a label — and killed its own
  focus ring with outline-none and nothing in its place.
- Toggle groups (workdays, reorg change type) became fieldsets with
  aria-pressed; colour alone was carrying the selected state.

Comboboxes
- Lookup and CountryPicker were text inputs with a div of clickable buttons
  underneath: typeable, but no keyboard path to a result and nothing telling
  a screen reader a list had appeared. Both now carry role=combobox,
  aria-expanded/controls/activedescendant and listbox semantics, with arrow
  keys, Enter and Escape. Escape stops propagation, or it would close the
  surrounding dialog along with the dropdown.

Dialogs
- useDialogFocus centralises what Modal and SlideOver each owed the
  keyboard and neither provided beyond Escape: focus into the dialog on
  open, Tab and Shift+Tab cycling within it, focus restored to the trigger
  on close.
- SlideOver stays mounted for its transition, and aria-hidden does not
  remove anything from the tab order — so every closed panel was leaving
  invisible tab stops at the end of the page. `inert` fixes that.

Route states
- loading.tsx, error.tsx, not-found.tsx and global-error.tsx. Every page in
  the (app) group is server-rendered per request, so without loading.tsx a
  navigation showed nothing at all until the server answered, and a render
  error dropped the user on Next's own screen with no way back.

Tests
- 22 component tests (vitest jsdom project). Two of them found limits of the
  environment rather than of the code: jsdom implements neither `inert` nor
  scrollIntoView, so the inert test asserts the attribute and the missing
  scrollIntoView — which was taking the whole render down from inside an
  effect — is stubbed in the setup file.
2026-07-25 13:11:09 +02:00

79 lines
2.8 KiB
TypeScript

import { login, logout } from "@/actions/auth";
import { Button } from "@/components/ui/Button";
import { CONTROL_CLASS } from "@/components/ui/Field";
// The query string is attacker-controlled, so the login page renders a message
// looked up by code rather than whatever text ?error= carries. Reflecting the
// raw parameter let anyone put arbitrary wording ("Ihr Konto wurde gesperrt,
// rufen Sie …") on the real, correctly-branded sign-in screen.
const ERROR_MESSAGES = {
no_hr_access: "Kein HR-Zugriff. Bitte wenden Sie sich an eine:n bestehende:n HR-Benutzer:in.",
invalid_credentials: "E-Mail oder Passwort ist falsch.",
} as const;
type ErrorCode = keyof typeof ERROR_MESSAGES;
type LoginPageProps = {
searchParams: Promise<{ error?: string }>;
};
export default async function LoginPage({ searchParams }: LoginPageProps) {
const params = await searchParams;
const code = params.error && Object.hasOwn(ERROR_MESSAGES, params.error) ? (params.error as ErrorCode) : null;
const error = code ? ERROR_MESSAGES[code] : null;
return (
<div className="flex min-h-screen items-center justify-center bg-surface px-4">
<div className="w-full max-w-sm rounded border border-border bg-white p-8 shadow-sm">
<h1 className="text-xl font-extrabold text-ink">Alpenwerk HR</h1>
<p className="mt-1 text-sm text-ink-muted">Melden Sie sich mit Ihrem Firmenkonto an.</p>
{error && (
<div role="alert" className="mt-4 rounded bg-danger-bg px-3 py-2 text-sm text-danger-text">
{error}
{code === "no_hr_access" && (
<form action={logout} className="mt-2">
<button type="submit" className="text-xs font-semibold underline hover:no-underline">
Abmelden und mit anderem Konto versuchen
</button>
</form>
)}
</div>
)}
<form action={login} className="mt-6 flex flex-col gap-4">
<div>
<label htmlFor="email" className="mb-1 block text-sm font-semibold text-ink">
E-Mail
</label>
<input
id="email"
name="email"
type="email"
required
autoComplete="username"
className={CONTROL_CLASS}
/>
</div>
<div>
<label htmlFor="password" className="mb-1 block text-sm font-semibold text-ink">
Passwort
</label>
<input
id="password"
name="password"
type="password"
required
autoComplete="current-password"
className={CONTROL_CLASS}
/>
</div>
<Button type="submit" fullWidth className="mt-2">
Anmelden
</Button>
</form>
</div>
</div>
);
}