React-Frontend: Login, Registrierung, Header, neuer Beitrag
- AuthBox mit Login/Registrierung (Auto-Login nach Registrierung) - Compose mit Zwischenablage-Bild, Feed springt danach an den Anfang - Headerbar mit Profil-Link und Logout - useAuthChanged: me und Votes nach Login/Logout neu laden - kein Aufblitzen der Login-Box, solange der Anmeldestatus lädt Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01TiXsPUqw7oeomZ8wZrQW5q
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Claude Opus 5.5
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import { useState, type FormEvent, type MouseEvent } from "react";
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import { api, errMsg } from "../api";
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import { useAuthChanged } from "../auth";
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// AuthBox: Login und Registrierung im Wechsel. Die {" "} bilden die
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// Leerzeichen des alten Markups nach -- Überschrift, Inputs und Knöpfe sind
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// inline, der Abstand zwischen ihnen ist also sichtbar.
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export function AuthBox() {
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const [mode, setMode] = useState<"login" | "register">("login");
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const [msg, setMsg] = useState("");
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const [busy, setBusy] = useState(false);
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const authChanged = useAuthChanged();
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const show = (which: "login" | "register") => (e: MouseEvent) => {
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e.preventDefault();
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setMode(which);
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setMsg("");
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};
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// submit sperrt das Formular für die Dauer des Requests und zeigt einen
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// Fehler als Meldung; action wirft bei Misserfolg (ApiError).
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const submit = (action: (fd: FormData) => Promise<unknown>, fallback: string) =>
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async (e: FormEvent<HTMLFormElement>) => {
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e.preventDefault();
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setBusy(true);
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try {
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await action(new FormData(e.currentTarget));
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setMsg("");
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await authChanged();
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} catch (err) {
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setMsg(errMsg(err, fallback));
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} finally {
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setBusy(false);
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}
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};
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const login = submit((fd) => api.post("/auth/login", fd), "Login fehlgeschlagen.");
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// Nach der Registrierung direkt mit denselben Daten einloggen, damit der
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// Nutzer gleich drin ist. newuser meldet alle Feldfehler auf einmal.
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const register = submit(async (fd) => {
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await api.post("/auth/newuser", fd);
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const creds = new FormData();
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creds.append("user", String(fd.get("user")));
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creds.append("pass", String(fd.get("pass1")));
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creds.append("timeout", "86400");
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await api.post("/auth/login", creds);
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}, "Registrierung fehlgeschlagen.");
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return (
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<section id="auth-box">
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<form id="login-form" hidden={mode !== "login"} onSubmit={login}>
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<h2>Login</h2>{" "}
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<input name="user" placeholder="Nutzername" autoComplete="username" />{" "}
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<input name="pass" type="password" placeholder="Passwort" autoComplete="current-password" />{" "}
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<input name="timeout" type="hidden" value="86400" />{" "}
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<button type="submit" disabled={busy}>Einloggen</button>{" "}
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<p className="muted">Noch kein Konto? <a href="#" onClick={show("register")}>Registrieren</a></p>
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</form>
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<form id="register-form" hidden={mode !== "register"} onSubmit={register}>
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<h2>Registrieren</h2>{" "}
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<input name="user" placeholder="Nutzername" autoComplete="username" />{" "}
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<input name="pass1" type="password" placeholder="Passwort" autoComplete="new-password" />{" "}
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<input name="pass2" type="password" placeholder="Passwort wiederholen" autoComplete="new-password" />{" "}
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<button type="submit" disabled={busy}>Konto erstellen</button>{" "}
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<p className="muted">Schon registriert? <a href="#" onClick={show("login")}>Zum Login</a></p>
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</form>
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<p className="msg" id="auth-msg">{msg}</p>
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</section>
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);
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}
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