vmall/apps/mall/pages/cart.vue

<script setup lang="ts">
import { t as pick } from "@vmall/shared";
import type { CartItem, LocalizedText } from "@vmall/shared";

type CartGroup = {
  shopId: string;
  shopName: LocalizedText;
  items: CartItem[];
};

const { $api } = useNuxtApp();
const { locale, t } = useI18n();
const { currency } = usePrefs();
const cartStore = useCartStore();
const router = useRouter();

const items = ref<CartItem[]>([]);
const selected = reactive<Record<string, boolean>>({});
const loading = ref(true);
const mutating = ref(false);
const error = ref("");

const stepLabels = computed(() => [
  t("cart.steps.cart"),
  t("cart.steps.order"),
  t("cart.steps.payment"),
  t("cart.steps.complete"),
]);

// Grouped by the line's own shop, which the cart API returns; the fixed-data
// catalog is no longer consulted for shop or stock.
const groups = computed<CartGroup[]>(() => {
  const grouped = new Map<string, CartGroup>();
  for (const item of items.value) {
    const group = grouped.get(item.shop_id) ?? {
      shopId: item.shop_id,
      shopName: item.shop_name,
      items: [],
    };
    group.items.push(item);
    grouped.set(item.shop_id, group);
  }
  return [...grouped.values()];
});

const selectedItems = computed(() => items.value.filter((item) => selected[item.sku_id]));
const allSelected = computed(
  () => items.value.length > 0 && items.value.every((item) => selected[item.sku_id]),
);
const selectedCurrency = computed(() => selectedItems.value[0]?.currency ?? currency.value);
const selectedTotalMinor = computed(() =>
  selectedItems.value.reduce((total, item) => total + item.unit_price_minor * item.qty, 0),
);

function imageFor(item: CartItem): string {
  return item.image ?? "/mock/product-1.svg";
}

function maxFor(item: CartItem): number {
  // Advisory stock from the cart line; checkout is what actually enforces it.
  return Math.max(1, item.stock);
}

async function loadCart(): Promise<void> {
  loading.value = true;
  error.value = "";
  try {
    const snapshot = await $api.getCart();
    const previous = { ...selected };
    for (const skuId of Object.keys(selected)) delete selected[skuId];
    items.value = snapshot.items;
    for (const item of items.value) selected[item.sku_id] = previous[item.sku_id] ?? true;
  } catch {
    error.value = t("cart.loadError");
  } finally {
    loading.value = false;
  }
}

function setAllSelected(checked: boolean): void {
  for (const item of items.value) selected[item.sku_id] = checked;
}

function onSelectionChange(skuId: string, event: Event): void {
  selected[skuId] = (event.target as HTMLInputElement).checked;
}

async function updateQuantity(item: CartItem, qty: number): Promise<void> {
  mutating.value = true;
  error.value = "";
  try {
    await $api.updateCartItem(item.sku_id, qty);
    await loadCart();
    await cartStore.refresh();
  } catch {
    error.value = t("cart.updateError");
  } finally {
    mutating.value = false;
  }
}

async function removeItem(item: CartItem): Promise<void> {
  mutating.value = true;
  error.value = "";
  try {
    await $api.removeCartItem(item.sku_id);
    await loadCart();
    await cartStore.refresh();
  } catch {
    error.value = t("cart.updateError");
  } finally {
    mutating.value = false;
  }
}

async function goToCheckout(): Promise<void> {
  if (selectedItems.value.length === 0) return;
  await router.push("/checkout");
}

onMounted(() => void loadCart());
</script>

<template>
  <div class="transaction-page cart-page">
    <div class="w1200">
      <UiStepBar :steps="stepLabels" :active="0" />
      <header class="page-heading">
        <h1>{{ t("cart.title") }}</h1>
      </header>

      <p v-if="error" class="error-message">{{ error }}</p>
      <template v-if="!loading && items.length > 0">
        <section v-for="group in groups" :key="group.shopId" class="shop-group mpanel">
          <header class="shop-heading">
            <span class="shop-label">{{ t("cart.shop") }}</span>
            <strong>{{ pick(group.shopName, locale) || t("cart.unknownStore") }}</strong>
          </header>
          <table class="mtable cart-table">
            <thead>
              <tr>
                <th class="check-col" />
                <th class="product-col">{{ t("cart.product") }}</th>
                <th>{{ t("cart.spec") }}</th>
                <th>{{ t("cart.unitPrice") }}</th>
                <th>{{ t("cart.quantity") }}</th>
                <th>{{ t("cart.subtotal") }}</th>
                <th>{{ t("cart.actions") }}</th>
              </tr>
            </thead>
            <tbody>
              <tr v-for="item in group.items" :key="item.sku_id">
                <td class="check-col">
                  <input
                    :checked="Boolean(selected[item.sku_id])"
                    type="checkbox"
                    :aria-label="pick(item.product_name, locale)"
                    @change="onSelectionChange(item.sku_id, $event)"
                  />
                </td>
                <td class="product-cell">
                  <img :src="imageFor(item)" :alt="pick(item.product_name, locale)" />
                  <span>{{ pick(item.product_name, locale) }}</span>
                </td>
                <td class="muted">{{ item.sku_code }}</td>
                <td><PriceText :amount-minor="item.unit_price_minor" :currency="item.currency" /></td>
                <td>
                  <UiQtyStepper
                    :model-value="item.qty"
                    :max="maxFor(item)"
                    @update:model-value="updateQuantity(item, $event)"
                  />
                </td>
                <td class="price-strong">
                  <PriceText :amount-minor="item.unit_price_minor * item.qty" :currency="item.currency" />
                </td>
                <td>
                  <button type="button" class="text-button" :disabled="mutating" @click="removeItem(item)">
                    {{ t("cart.remove") }}
                  </button>
                </td>
              </tr>
            </tbody>
          </table>
        </section>

        <footer class="cart-footer mpanel">
          <label class="select-all">
            <input :checked="allSelected" type="checkbox" @change="setAllSelected(($event.target as HTMLInputElement).checked)" />
            <span>{{ t("cart.selectAll") }}</span>
          </label>
          <span class="selected-count">{{ t("cart.selectedCount", { n: selectedItems.length }) }}</span>
          <span class="total-label">{{ t("cart.subtotal") }}:</span>
          <strong class="total-price"><PriceText :amount-minor="selectedTotalMinor" :currency="selectedCurrency" /></strong>
          <button class="mbtn red checkout-button" type="button" :disabled="selectedItems.length === 0 || mutating" @click="goToCheckout">
            {{ t("cart.checkout") }}
          </button>
        </footer>
      </template>

      <div v-else-if="!loading" class="empty-wrap mpanel">
        <UiEmptyState :text="t('cart.empty')" />
        <NuxtLink class="mbtn red" to="/">{{ t("cart.continueShopping") }}</NuxtLink>
      </div>
      <div v-else class="loading-state">{{ $t("common.loading") }}</div>
    </div>
  </div>
</template>

<style scoped>
.transaction-page {
  padding: 24px 0 56px;
  background: #f5f5f5;
  min-height: 60vh;
}
.page-heading {
  display: flex;
  align-items: center;
  margin: 0 0 16px;
}
.page-heading h1 {
  margin: 0;
  font-size: 20px;
  font-weight: 500;
}
.error-message {
  margin: 0 0 16px;
  padding: 10px 14px;
  color: #b42318;
  background: #fff1f0;
  border: 1px solid #ffd6d2;
}
.shop-group {
  margin-bottom: 16px;
  padding: 0;
  overflow: hidden;
}
.shop-heading {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--mall-line);
  font-size: 14px;
}
.shop-label {
  color: var(--mall-muted);
  font-size: 12px;
}
.cart-table {
  margin: 0;
  width: 100%;
}
.cart-table th,
.cart-table td {
  padding: 14px 10px;
  vertical-align: middle;
}
.cart-table th:first-child,
.cart-table td:first-child {
  padding-left: 18px;
}
.cart-table th:last-child,
.cart-table td:last-child {
  padding-right: 18px;
}
.check-col {
  width: 42px;
  text-align: center;
}
.product-col {
  width: 34%;
}
.product-cell {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 60px;
  line-height: 1.5;
}
.product-cell img {
  width: 60px;
  height: 60px;
  flex: 0 0 60px;
  object-fit: cover;
  border: 1px solid var(--mall-line);
  background: #fff;
}
.muted {
  color: var(--mall-muted);
  font-size: 12px;
}
.price-strong,
.total-price {
  color: var(--mall-red);
  font-weight: 600;
}
.text-button {
  border: 0;
  background: transparent;
  color: var(--mall-muted);
  cursor: pointer;
  padding: 4px;
}
.text-button:hover {
  color: var(--mall-red);
}
.text-button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}
.cart-footer {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 18px;
}
.select-all {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  cursor: pointer;
}
.selected-count {
  color: var(--mall-muted);
  font-size: 13px;
}
.total-label {
  margin-left: auto;
  color: var(--mall-muted);
  font-size: 13px;
}
.total-price {
  font-size: 18px;
}
.checkout-button {
  min-width: 112px;
}
.empty-wrap {
  padding-bottom: 28px;
  text-align: center;
}
.empty-wrap :deep(.empty) {
  padding-bottom: 20px;
}
.loading-state {
  padding: 70px 0;
  text-align: center;
  color: var(--mall-muted);
}
</style>