feat: username/ww login, tijdzone fix, Vannacht → Eergisternacht"

2026-05-15 18:12:47 +02:00
parent cfd9ed4eae
commit a094e67f69
10 changed files with 316 additions and 70 deletions
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -6,6 +6,7 @@ services:
    container_name: slaapkampioen
    restart: unless-stopped
    environment:
+      TZ: Europe/Brussels
      DATABASE_URL: postgresql://sleep:${POSTGRES_PASSWORD}@db:5432/sleep
      NEXTAUTH_URL: ${NEXTAUTH_URL}
      NEXTAUTH_SECRET: ${NEXTAUTH_SECRET}
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,12 +10,14 @@
      "dependencies": {
        "@next-auth/prisma-adapter": "^1.0.7",
        "@prisma/client": "^5.16.0",
+        "bcryptjs": "^2.4.3",
        "next": "^14.2.5",
        "next-auth": "^4.24.7",
        "react": "^18.3.0",
        "react-dom": "^18.3.0"
      },
      "devDependencies": {
+        "@types/bcryptjs": "^2.4.6",
        "@types/node": "^20.14.0",
        "@types/react": "^18.3.0",
        "@types/react-dom": "^18.3.0",
@@ -378,6 +380,13 @@
        "tslib": "^2.4.0"
      }
    },
+    "node_modules/@types/bcryptjs": {
+      "version": "2.4.6",
+      "resolved": "https://registry.npmjs.org/@types/bcryptjs/-/bcryptjs-2.4.6.tgz",
+      "integrity": "sha512-9xlo6R2qDs5uixm0bcIqCeMCE6HiQsIyel9KQySStiyqNl2tnj2mP3DX1Nf56MD6KMenNNlBBsy3LJ7gUEQPXQ==",
+      "dev": true,
+      "license": "MIT"
+    },
    "node_modules/@types/node": {
      "version": "20.19.41",
      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.19.41.tgz",
@@ -494,6 +503,12 @@
        "node": ">=6.0.0"
      }
    },
+    "node_modules/bcryptjs": {
+      "version": "2.4.3",
+      "resolved": "https://registry.npmjs.org/bcryptjs/-/bcryptjs-2.4.3.tgz",
+      "integrity": "sha512-V/Hy/X9Vt7f3BbPJEi8BdVFMByHi+jNXrYkW3huaybV/kQ0KJg0Y6PkEMbn+zeT+i+SiKZ/HMqJGIIt4LZDqNQ==",
+      "license": "MIT"
+    },
    "node_modules/binary-extensions": {
      "version": "2.3.0",
      "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.3.0.tgz",
--- a/package.json
+++ b/package.json
@@ -17,7 +17,8 @@
    "next": "^14.2.5",
    "next-auth": "^4.24.7",
    "react": "^18.3.0",
-    "react-dom": "^18.3.0"
+    "react-dom": "^18.3.0",
+    "bcryptjs": "^2.4.3"
  },
  "devDependencies": {
    "@types/node": "^20.14.0",
@@ -27,6 +28,7 @@
    "postcss": "^8.4.38",
    "prisma": "^5.16.0",
    "tailwindcss": "^3.4.4",
-    "typescript": "^5.4.5"
+    "typescript": "^5.4.5",
+    "@types/bcryptjs": "^2.4.6"
  }
-}
+}
--- a/prisma/migrations/20240515000001_add_credentials/migration.sql
+++ b/prisma/migrations/20240515000001_add_credentials/migration.sql
@@ -0,0 +1,6 @@
+-- AlterTable
+ALTER TABLE "User" ADD COLUMN "username" TEXT;
+ALTER TABLE "User" ADD COLUMN "password" TEXT;
+
+-- CreateIndex
+CREATE UNIQUE INDEX "User_username_key" ON "User"("username");
--- a/src/app/api/auth/register/route.ts
+++ b/src/app/api/auth/register/route.ts
@@ -0,0 +1,34 @@
+import { NextRequest, NextResponse } from "next/server";
+import bcrypt from "bcryptjs";
+import { prisma } from "@/lib/prisma";
+
+export async function POST(req: NextRequest) {
+  const { username, password } = await req.json();
+
+  if (!username || !password) {
+    return NextResponse.json({ error: "Gebruikersnaam en wachtwoord zijn verplicht." }, { status: 400 });
+  }
+  if (username.length < 3) {
+    return NextResponse.json({ error: "Gebruikersnaam moet minstens 3 tekens zijn." }, { status: 400 });
+  }
+  if (password.length < 6) {
+    return NextResponse.json({ error: "Wachtwoord moet minstens 6 tekens zijn." }, { status: 400 });
+  }
+
+  const existing = await prisma.user.findUnique({ where: { username } });
+  if (existing) {
+    return NextResponse.json({ error: "Deze gebruikersnaam is al in gebruik." }, { status: 409 });
+  }
+
+  const hashed = await bcrypt.hash(password, 12);
+
+  await prisma.user.create({
+    data: {
+      username,
+      name: username,
+      password: hashed,
+    },
+  });
+
+  return NextResponse.json({ success: true });
+}
--- a/src/app/login/page.tsx
+++ b/src/app/login/page.tsx
@@ -1,27 +1,112 @@
 "use client";

-import { signIn } from "next-auth/react";
+import { signIn, useSession } from "next-auth/react";
+import { useRouter } from "next/navigation";
+import { useState, useEffect } from "react";
+import Link from "next/link";

 export default function LoginPage() {
+  const { data: session, status } = useSession();
+  const router = useRouter();
+
+  const [username, setUsername] = useState("");
+  const [password, setPassword] = useState("");
+  const [error, setError]       = useState("");
+  const [loading, setLoading]   = useState(false);
+
+  // Al ingelogd → meteen door naar klassement
+  useEffect(() => {
+    if (status === "authenticated") router.replace("/");
+  }, [status, router]);
+
+  if (status === "loading" || status === "authenticated") {
+    return (
+      <div className="flex items-center justify-center min-h-[70vh]">
+        <div className="text-slate-500">Laden…</div>
+      </div>
+    );
+  }
+
+  async function handleCredentials() {
+    setError("");
+    setLoading(true);
+    const res = await signIn("credentials", {
+      username,
+      password,
+      redirect: false,
+    });
+    setLoading(false);
+    if (res?.error) {
+      setError("Gebruikersnaam of wachtwoord klopt niet.");
+    } else {
+      router.replace("/");
+    }
+  }
+
  return (
-    <div className="flex flex-col items-center justify-center min-h-[70vh] text-center px-4">
-      <div className="text-7xl mb-6">💤</div>
-      <h1 className="text-3xl font-bold text-slate-100 mb-2">SlaapKampioen</h1>
-      <p className="text-slate-400 mb-8 max-w-sm">
-        Log elke nacht je slaap en zie wie het meeste slaapt in jouw vriendengroep.
-      </p>
-      <button
-        onClick={() => signIn("discord")}
-        className="flex items-center gap-3 px-6 py-3 bg-indigo-600 hover:bg-indigo-500 rounded-xl font-semibold text-white transition-colors text-lg"
-      >
-        <svg className="w-6 h-6" viewBox="0 0 24 24" fill="currentColor">
-          <path d="M20.317 4.37a19.791 19.791 0 0 0-4.885-1.515.074.074 0 0 0-.079.037c-.21.375-.444.864-.608 1.25a18.27 18.27 0 0 0-5.487 0 12.64 12.64 0 0 0-.617-1.25.077.077 0 0 0-.079-.037A19.736 19.736 0 0 0 3.677 4.37a.07.07 0 0 0-.032.027C.533 9.046-.32 13.58.099 18.057c.002.022.015.043.033.057a19.9 19.9 0 0 0 5.993 3.03.078.078 0 0 0 .084-.028 14.09 14.09 0 0 0 1.226-1.994.076.076 0 0 0-.041-.106 13.107 13.107 0 0 1-1.872-.892.077.077 0 0 1-.008-.128 10.2 10.2 0 0 0 .372-.292.074.074 0 0 1 .077-.01c3.928 1.793 8.18 1.793 12.062 0a.074.074 0 0 1 .078.01c.12.098.246.198.373.292a.077.077 0 0 1-.006.127 12.299 12.299 0 0 1-1.873.892.077.077 0 0 0-.041.107c.36.698.772 1.362 1.225 1.993a.076.076 0 0 0 .084.028 19.839 19.839 0 0 0 6.002-3.03.077.077 0 0 0 .032-.054c.5-5.177-.838-9.674-3.549-13.66a.061.061 0 0 0-.031-.03z" />
-        </svg>
-        Inloggen met Discord
-      </button>
-      <p className="text-slate-600 text-sm mt-6">
-        Alleen toegankelijk voor uitgenodigde vrienden.
-      </p>
+    <div className="flex flex-col items-center justify-center min-h-[70vh] px-4">
+      <div className="w-full max-w-sm space-y-6">
+
+        {/* Logo */}
+        <div className="text-center">
+          <div className="text-6xl mb-3">💤</div>
+          <h1 className="text-2xl font-bold text-slate-100">SlaapKampioen</h1>
+          <p className="text-slate-500 text-sm mt-1">Log je slaap, win het klassement.</p>
+        </div>
+
+        {/* Discord */}
+        <button
+          onClick={() => signIn("discord", { callbackUrl: "/" })}
+          className="w-full flex items-center justify-center gap-3 px-4 py-3 bg-indigo-600 hover:bg-indigo-500 rounded-xl font-semibold text-white transition-colors"
+        >
+          <svg className="w-5 h-5" viewBox="0 0 24 24" fill="currentColor">
+            <path d="M20.317 4.37a19.791 19.791 0 0 0-4.885-1.515.074.074 0 0 0-.079.037c-.21.375-.444.864-.608 1.25a18.27 18.27 0 0 0-5.487 0 12.64 12.64 0 0 0-.617-1.25.077.077 0 0 0-.079-.037A19.736 19.736 0 0 0 3.677 4.37a.07.07 0 0 0-.032.027C.533 9.046-.32 13.58.099 18.057c.002.022.015.043.033.057a19.9 19.9 0 0 0 5.993 3.03.078.078 0 0 0 .084-.028 14.09 14.09 0 0 0 1.226-1.994.076.076 0 0 0-.041-.106 13.107 13.107 0 0 1-1.872-.892.077.077 0 0 1-.008-.128 10.2 10.2 0 0 0 .372-.292.074.074 0 0 1 .077-.01c3.928 1.793 8.18 1.793 12.062 0a.074.074 0 0 1 .078.01c.12.098.246.198.373.292a.077.077 0 0 1-.006.127 12.299 12.299 0 0 1-1.873.892.077.077 0 0 0-.041.107c.36.698.772 1.362 1.225 1.993a.076.076 0 0 0 .084.028 19.839 19.839 0 0 0 6.002-3.03.077.077 0 0 0 .032-.054c.5-5.177-.838-9.674-3.549-13.66a.061.061 0 0 0-.031-.03z" />
+          </svg>
+          Inloggen met Discord
+        </button>
+
+        {/* Divider */}
+        <div className="flex items-center gap-3">
+          <div className="flex-1 border-t border-slate-700" />
+          <span className="text-xs text-slate-600">of</span>
+          <div className="flex-1 border-t border-slate-700" />
+        </div>
+
+        {/* Credentials */}
+        <div className="space-y-3">
+          <input
+            type="text"
+            placeholder="Gebruikersnaam"
+            value={username}
+            onChange={(e) => setUsername(e.target.value)}
+            onKeyDown={(e) => e.key === "Enter" && handleCredentials()}
+            className="w-full bg-slate-800 border border-slate-700 rounded-xl px-4 py-3 text-slate-100 placeholder-slate-500 focus:outline-none focus:ring-2 focus:ring-indigo-500"
+          />
+          <input
+            type="password"
+            placeholder="Wachtwoord"
+            value={password}
+            onChange={(e) => setPassword(e.target.value)}
+            onKeyDown={(e) => e.key === "Enter" && handleCredentials()}
+            className="w-full bg-slate-800 border border-slate-700 rounded-xl px-4 py-3 text-slate-100 placeholder-slate-500 focus:outline-none focus:ring-2 focus:ring-indigo-500"
+          />
+          {error && <p className="text-red-400 text-sm text-center">⚠️ {error}</p>}
+          <button
+            onClick={handleCredentials}
+            disabled={loading || !username || !password}
+            className="w-full py-3 bg-slate-700 hover:bg-slate-600 disabled:opacity-40 disabled:cursor-not-allowed rounded-xl font-semibold text-slate-100 transition-colors"
+          >
+            {loading ? "Inloggen…" : "Inloggen"}
+          </button>
+        </div>
+
+        <p className="text-center text-sm text-slate-600">
+          Nog geen account?{" "}
+          <Link href="/register" className="text-indigo-400 hover:text-indigo-300 underline underline-offset-2">
+            Registreer hier
+          </Link>
+        </p>
+      </div>
    </div>
  );
-}
+}
--- a/src/app/register/page.tsx
+++ b/src/app/register/page.tsx
@@ -0,0 +1,91 @@
+"use client";
+
+import { useState } from "react";
+import { signIn } from "next-auth/react";
+import { useRouter } from "next/navigation";
+import Link from "next/link";
+
+export default function RegisterPage() {
+  const router = useRouter();
+  const [username, setUsername]   = useState("");
+  const [password, setPassword]   = useState("");
+  const [password2, setPassword2] = useState("");
+  const [error, setError]         = useState("");
+  const [loading, setLoading]     = useState(false);
+
+  async function handleRegister() {
+    setError("");
+    if (password !== password2) {
+      setError("Wachtwoorden komen niet overeen.");
+      return;
+    }
+    setLoading(true);
+    const res = await fetch("/api/auth/register", {
+      method: "POST",
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify({ username, password }),
+    });
+    const data = await res.json();
+    if (!res.ok) {
+      setError(data.error ?? "Registratie mislukt.");
+      setLoading(false);
+      return;
+    }
+    // Direct inloggen na registratie
+    await signIn("credentials", { username, password, redirect: false });
+    router.replace("/");
+  }
+
+  return (
+    <div className="flex flex-col items-center justify-center min-h-[70vh] px-4">
+      <div className="w-full max-w-sm space-y-5">
+
+        <div className="text-center">
+          <div className="text-5xl mb-3">🛌</div>
+          <h1 className="text-2xl font-bold text-slate-100">Account aanmaken</h1>
+          <p className="text-slate-500 text-sm mt-1">Kies een gebruikersnaam en wachtwoord.</p>
+        </div>
+
+        <div className="space-y-3">
+          <input
+            type="text"
+            placeholder="Gebruikersnaam (min. 3 tekens)"
+            value={username}
+            onChange={(e) => setUsername(e.target.value)}
+            className="w-full bg-slate-800 border border-slate-700 rounded-xl px-4 py-3 text-slate-100 placeholder-slate-500 focus:outline-none focus:ring-2 focus:ring-indigo-500"
+          />
+          <input
+            type="password"
+            placeholder="Wachtwoord (min. 6 tekens)"
+            value={password}
+            onChange={(e) => setPassword(e.target.value)}
+            className="w-full bg-slate-800 border border-slate-700 rounded-xl px-4 py-3 text-slate-100 placeholder-slate-500 focus:outline-none focus:ring-2 focus:ring-indigo-500"
+          />
+          <input
+            type="password"
+            placeholder="Herhaal wachtwoord"
+            value={password2}
+            onChange={(e) => setPassword2(e.target.value)}
+            onKeyDown={(e) => e.key === "Enter" && handleRegister()}
+            className="w-full bg-slate-800 border border-slate-700 rounded-xl px-4 py-3 text-slate-100 placeholder-slate-500 focus:outline-none focus:ring-2 focus:ring-indigo-500"
+          />
+          {error && <p className="text-red-400 text-sm text-center">⚠️ {error}</p>}
+          <button
+            onClick={handleRegister}
+            disabled={loading || !username || !password || !password2}
+            className="w-full py-3 bg-indigo-600 hover:bg-indigo-500 disabled:opacity-40 disabled:cursor-not-allowed rounded-xl font-semibold text-white transition-colors"
+          >
+            {loading ? "Account aanmaken…" : "Account aanmaken"}
+          </button>
+        </div>
+
+        <p className="text-center text-sm text-slate-600">
+          Al een account?{" "}
+          <Link href="/login" className="text-indigo-400 hover:text-indigo-300 underline underline-offset-2">
+            Inloggen
+          </Link>
+        </p>
+      </div>
+    </div>
+  );
+}
--- a/src/components/SleepForm.tsx
+++ b/src/components/SleepForm.tsx
@@ -4,8 +4,8 @@ import { useState, useEffect } from "react";
 import { useRouter } from "next/navigation";
 import { calculateTotalFromTimes, formatDuration } from "@/lib/utils";

-const YESTERDAY = new Date(Date.now() - 86400000).toISOString().slice(0, 10);
-const TODAY     = new Date().toISOString().slice(0, 10);
+const YESTERDAY      = new Date(Date.now() - 86400000).toISOString().slice(0, 10);
+const DAY_BEFORE     = new Date(Date.now() - 172800000).toISOString().slice(0, 10);

 function fromMinutes(total: number) {
  return { h: String(Math.floor(total / 60)), m: String(total % 60) };
@@ -149,6 +149,16 @@ export function SleepForm() {
      <div className="bg-slate-800/60 rounded-xl p-4 space-y-3">
        <p className="text-sm font-semibold text-slate-200">📅 Datum van de nacht</p>
        <div className="flex gap-2">
+          <button
+            onClick={() => setDate(DAY_BEFORE)}
+            className={`flex-1 py-2 rounded-lg text-sm font-medium transition-colors ${
+              date === DAY_BEFORE
+                ? "bg-indigo-600 text-white"
+                : "bg-slate-700 text-slate-400 hover:text-slate-100"
+            }`}
+          >
+            Eergisternacht
+          </button>
          <button
            onClick={() => setDate(YESTERDAY)}
            className={`flex-1 py-2 rounded-lg text-sm font-medium transition-colors ${
@@ -159,16 +169,6 @@ export function SleepForm() {
          >
            Gisternacht
          </button>
-          <button
-            onClick={() => setDate(TODAY)}
-            className={`flex-1 py-2 rounded-lg text-sm font-medium transition-colors ${
-              date === TODAY
-                ? "bg-indigo-600 text-white"
-                : "bg-slate-700 text-slate-400 hover:text-slate-100"
-            }`}
-          >
-            Vannacht
-          </button>
        </div>
        <input
          type="date"
@@ -325,4 +325,4 @@ export function SleepForm() {
      </button>
    </div>
  );
-}
+}
--- a/src/lib/auth.ts
+++ b/src/lib/auth.ts
@@ -1,33 +1,47 @@
 import { NextAuthOptions } from "next-auth";
 import DiscordProvider from "next-auth/providers/discord";
+import CredentialsProvider from "next-auth/providers/credentials";
 import { PrismaAdapter } from "@next-auth/prisma-adapter";
+import bcrypt from "bcryptjs";
 import { prisma } from "./prisma";

 export const authOptions: NextAuthOptions = {
  adapter: PrismaAdapter(prisma),
-  // JWT strategy zodat de middleware de sessie kan verifieren
-  // zonder een database call te doen bij elk request
-  session: {
-    strategy: "jwt",
-  },
+  session: { strategy: "jwt" },
  providers: [
    DiscordProvider({
      clientId: process.env.DISCORD_CLIENT_ID!,
      clientSecret: process.env.DISCORD_CLIENT_SECRET!,
    }),
+    CredentialsProvider({
+      name: "credentials",
+      credentials: {
+        username: { label: "Gebruikersnaam", type: "text" },
+        password: { label: "Wachtwoord", type: "password" },
+      },
+      async authorize(credentials) {
+        if (!credentials?.username || !credentials?.password) return null;
+
+        const user = await prisma.user.findUnique({
+          where: { username: credentials.username },
+        });
+
+        if (!user?.password) return null;
+
+        const valid = await bcrypt.compare(credentials.password, user.password);
+        if (!valid) return null;
+
+        return { id: user.id, name: user.name, email: user.email, image: user.image };
+      },
+    }),
  ],
  callbacks: {
    jwt({ token, user }) {
-      // user is alleen aanwezig bij eerste login
-      if (user) {
-        token.id = user.id;
-      }
+      if (user) token.id = user.id;
      return token;
    },
    session({ session, token }) {
-      if (session.user) {
-        session.user.id = token.id as string;
-      }
+      if (session.user) session.user.id = token.id as string;
      return session;
    },
  },
--- a/src/lib/utils.ts
+++ b/src/lib/utils.ts
@@ -4,19 +4,15 @@ export function formatDuration(minutes: number): string {
  return `${h}u ${m.toString().padStart(2, "0")}min`;
 }

-export function minutesToHoursDecimal(minutes: number): number {
-  return Math.round((minutes / 60) * 10) / 10;
-}
-
 export function getSleepQuality(minutes: number): {
  label: string;
  color: string;
  bg: string;
 } {
-  if (minutes < 300) return { label: "Heel kort", color: "text-red-400", bg: "bg-red-500/20 text-red-400" };
-  if (minutes < 360) return { label: "Kort", color: "text-orange-400", bg: "bg-orange-500/20 text-orange-400" };
-  if (minutes < 420) return { label: "Matig", color: "text-yellow-400", bg: "bg-yellow-500/20 text-yellow-400" };
-  if (minutes <= 540) return { label: "Goed", color: "text-green-400", bg: "bg-green-500/20 text-green-400" };
+  if (minutes < 300) return { label: "Heel kort", color: "text-red-400",    bg: "bg-red-500/20 text-red-400" };
+  if (minutes < 360) return { label: "Kort",      color: "text-orange-400", bg: "bg-orange-500/20 text-orange-400" };
+  if (minutes < 420) return { label: "Matig",     color: "text-yellow-400", bg: "bg-yellow-500/20 text-yellow-400" };
+  if (minutes <= 540) return { label: "Goed",     color: "text-green-400",  bg: "bg-green-500/20 text-green-400" };
  return { label: "Lang", color: "text-blue-400", bg: "bg-blue-500/20 text-blue-400" };
 }

@@ -26,30 +22,32 @@ export function getPhaseQuality(
  type: "deep" | "light" | "rem" | "awake"
 ): { label: string; className: string } {
  const pct = (phaseMinutes / totalMinutes) * 100;
-
  if (type === "deep") {
    if (pct >= 13 && pct <= 25) return { label: "Normaal", className: "bg-green-500/20 text-green-400" };
-    if (pct > 25) return { label: "Lang", className: "bg-orange-500/20 text-orange-400" };
-    return { label: "Kort", className: "bg-red-500/20 text-red-400" };
+    if (pct > 25)               return { label: "Lang",    className: "bg-orange-500/20 text-orange-400" };
+    return                             { label: "Kort",    className: "bg-red-500/20 text-red-400" };
  }
  if (type === "light") {
    if (pct >= 45 && pct <= 65) return { label: "Normaal", className: "bg-green-500/20 text-green-400" };
-    if (pct > 65) return { label: "Lang", className: "bg-orange-500/20 text-orange-400" };
-    return { label: "Kort", className: "bg-red-500/20 text-red-400" };
+    if (pct > 65)               return { label: "Lang",    className: "bg-orange-500/20 text-orange-400" };
+    return                             { label: "Kort",    className: "bg-red-500/20 text-red-400" };
  }
  if (type === "rem") {
    if (pct >= 15 && pct <= 25) return { label: "Normaal", className: "bg-green-500/20 text-green-400" };
-    if (pct > 25) return { label: "Lang", className: "bg-orange-500/20 text-orange-400" };
-    return { label: "Kort", className: "bg-red-500/20 text-red-400" };
+    if (pct > 25)               return { label: "Lang",    className: "bg-orange-500/20 text-orange-400" };
+    return                             { label: "Kort",    className: "bg-red-500/20 text-red-400" };
  }
-  // awake
-  if (pct <= 5) return { label: "Normaal", className: "bg-green-500/20 text-green-400" };
-  if (pct <= 10) return { label: "Matig", className: "bg-yellow-500/20 text-yellow-400" };
-  return { label: "Veel", className: "bg-red-500/20 text-red-400" };
+  if (pct <= 5)  return { label: "Normaal", className: "bg-green-500/20 text-green-400" };
+  if (pct <= 10) return { label: "Matig",   className: "bg-yellow-500/20 text-yellow-400" };
+  return               { label: "Veel",    className: "bg-red-500/20 text-red-400" };
 }

+// Prisma @db.Date geeft UTC middernacht terug → trek datum uit ISO string
+// om tijdzone-offset te vermijden
 export function formatDate(date: string | Date): string {
-  return new Date(date).toLocaleDateString("nl-BE", {
+  const iso = typeof date === "string" ? date : date.toISOString();
+  const [year, month, day] = iso.slice(0, 10).split("-").map(Number);
+  return new Date(year, month - 1, day).toLocaleDateString("nl-BE", {
    weekday: "short",
    day: "numeric",
    month: "short",
@@ -62,6 +60,6 @@ export function calculateTotalFromTimes(bedtime: string, wakeTime: string): numb
  const [bh, bm] = bedtime.split(":").map(Number);
  const [wh, wm] = wakeTime.split(":").map(Number);
  let total = wh * 60 + wm - (bh * 60 + bm);
-  if (total <= 0) total += 24 * 60; // crosses midnight
+  if (total <= 0) total += 24 * 60; // kruist middernacht
  return total;
-}
+}