Test

cart.js

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+function formatEuro(value) {
+    return `${Number(value || 0).toFixed(2).replace(".", ",")} EUR`;
+}
+
+function escapeHtml(value) {
+    return String(value || "")
+        .replaceAll("&", "&")
+        .replaceAll("<", "&lt;")
+        .replaceAll(">", "&gt;")
+        .replaceAll('"', "&quot;")
+        .replaceAll("'", "&#39;");
+}
+
+function buildCartKey(item) {
+    const infoText = item.category === "movie"
+        ? `Sitz: ${item.seatId} (${item.hall})`
+        : item.time;
+    return `${item.title}-${item.hall}-${infoText}`;
+}
+
+function isDrinkItem(item) {
+    if (item.category !== "snack") {
+        return false;
+    }
+
+    const title = String(item.title || "").toLowerCase();
+    const size = String(item.hall || "").toLowerCase();
+    const drinkKeywords = [
+        "cola",
+        "sprite",
+        "fanta",
+        "mezzo",
+        "fuze",
+        "wasser",
+        "getraenk",
+        "drink"
+    ];
+
+    return drinkKeywords.some((word) => title.includes(word)) || size.includes("l");
+}
+
+function buildItemInfo(item) {
+    if (item.category === "movie") {
+        return `
+            <div>Sitzplatz: ${escapeHtml(item.seatId || "-")}</div>
+            <div>Saal: ${escapeHtml(item.hall || "-")}</div>
+            <div>Uhrzeit: ${escapeHtml(item.time || "-")} Uhr</div>
+        `;
+    }
+
+    if (isDrinkItem(item)) {
+        return `
+            <div>Variante: ${escapeHtml(item.time || "-")}</div>
+            <div>Groesse: ${escapeHtml(item.hall || "-")}</div>
+        `;
+    }
+
+    return `
+        <div>Kategorie: Snack</div>
+        <div>Variante: ${escapeHtml(item.time || "-")}</div>
+        <div>Groesse: ${escapeHtml(item.hall || "-")}</div>
+    `;
+}
+
+function groupCartItems() {
+    const groups = new Map();
+
+    cart.forEach((item) => {
+        const key = buildCartKey(item);
+
+        if (!groups.has(key)) {
+            groups.set(key, {
+                key,
+                quantity: 0,
+                total: 0,
+                item
+            });
+        }
+
+        const group = groups.get(key);
+        group.quantity += 1;
+        group.total += Number(item.price || 0);
+    });
+
+    return Array.from(groups.values());
+}
+
+function saveCart() {
+    localStorage.setItem("eagleCart", JSON.stringify(cart));
+    updateCartBadge();
+}
+
+function updateCartBadge() {
+    const cartBadge = document.getElementById("cart-badge");
+
+    if (!cartBadge) {
+        return;
+    }
+
+    cartBadge.innerText = cart.length;
+    cartBadge.classList.toggle("hidden", cart.length === 0);
+}
+
+function renderCart() {
+    const cartList = document.getElementById("cart-items-list");
+    const totalEl = document.getElementById("cart-total-right");
+    const vatEl = document.getElementById("cart-vat-right");
+
+    if (!cartList || !totalEl || !vatEl) {
+        return;
+    }
+
+    if (!Array.isArray(cart) || cart.length === 0) {
+        cartList.innerHTML = '<p>Dein Warenkorb ist leer.</p>';
+        totalEl.innerText = formatEuro(0);
+        vatEl.innerText = `inkl. 19% MwSt: ${formatEuro(0)}`;
+        return;
+    }
+
+    const groupedItems = groupCartItems();
+
+    const header = `
+        <div class="cart-header-row">
+            <div class="col-amount">MENGE</div>
+            <div class="col-img">VORSCHAU</div>
+            <div class="col-product">NAME</div>
+            <div class="col-details">INFO</div>
+            <div class="col-price">PREIS</div>
+            <div class="col-action">AKTION</div>
+        </div>
+    `;
+
+    const rows = groupedItems
+        .map((group) => {
+            const imageHtml = group.item.img
+                ? `<img class="cart-img-small" src="${escapeHtml(group.item.img)}" alt="${escapeHtml(group.item.title)}">`
+                : `<div class="cart-img-fallback">Kein Bild</div>`;
+            const quantityHtml = group.item.category === "movie"
+                ? `<div class="qty-static" aria-label="Feste Ticketanzahl">${group.quantity}x</div>`
+                : `
+                    <div class="qty-stepper">
+                        <button class="btn-qty" data-action="minus" data-key="${escapeHtml(group.key)}">-</button>
+                        <span>${group.quantity}</span>
+                        <button class="btn-qty" data-action="plus" data-key="${escapeHtml(group.key)}">+</button>
+                    </div>
+                `;
+
+            return `
+                <div class="cart-item-row">
+                    <div class="col-amount">
+                        ${quantityHtml}
+                    </div>
+                    <div class="col-img">${imageHtml}</div>
+                    <div class="col-product">${escapeHtml(group.item.title)}</div>
+                    <div class="col-details cart-item-info">${buildItemInfo(group.item)}</div>
+                    <div class="col-price">${formatEuro(group.total)}</div>
+                    <div class="col-action">
+                        <button class="btn-delete-item" data-key="${escapeHtml(group.key)}" aria-label="Eintrag entfernen"><span aria-hidden="true">🗑️</span></button>
+                    </div>
+                </div>
+            `;
+        })
+        .join("");
+
+    cartList.innerHTML = header + rows;
+
+    const total = cart.reduce((sum, item) => sum + Number(item.price || 0), 0);
+    const vat = total - total / 1.19;
+
+    totalEl.innerText = formatEuro(total);
+    vatEl.innerText = `inkl. 19% MwSt: ${formatEuro(vat)}`;
+
+    saveCart();
+}
+
+window.removeItem = function removeItem(id) {
+    cart = cart.filter((item) => item.id !== id);
+    saveCart();
+    renderCart();
+};
+
+window.changeQty = function changeQty(title, delta) {
+    if (delta > 0) {
+        const item = cart.find((entry) => entry.title === title);
+        if (item) {
+            cart.push({ ...item, id: Date.now() + Math.random() });
+        }
+    } else {
+        const index = cart
+            .map((entry) => entry.title)
+            .lastIndexOf(title);
+        if (index !== -1) {
+            cart.splice(index, 1);
+        }
+    }
+
+    saveCart();
+    renderCart();
+};