vmall/apps/mall/pages/search.vue

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

// Only sorts the catalog model can answer. Brand and sales/comment facets were
// removed in Wave 1: no backend model backs them.
type SortType = "default" | "price";
type OrderType = "asc" | "desc";

const route = useRoute();
const router = useRouter();
const { locale, t } = useI18n();
const { $api } = useNuxtApp();

const queryValue = (value: unknown): string => {
  if (Array.isArray(value)) return typeof value[0] === "string" ? value[0] : "";
  return typeof value === "string" ? value : "";
};

const state = computed(() => {
  const sort: SortType = queryValue(route.query.sort) === "price" ? "price" : "default";
  const order: OrderType = queryValue(route.query.order) === "asc" ? "asc" : "desc";
  const pageValue = Number.parseInt(queryValue(route.query.page), 10);
  return {
    q: queryValue(route.query.q),
    category: queryValue(route.query.category),
    sort,
    order,
    page: Number.isFinite(pageValue) && pageValue > 0 ? pageValue : 1,
  };
});

const emptyPage: Paged<Product> = { items: [], total: 0, page: 1, per_page: 20 };

const { data: result } = await useAsyncData(
  "search-results",
  () =>
    $api.listProducts({
      q: state.value.q || undefined,
      category_id: state.value.category || undefined,
      sort: state.value.sort === "price" ? "price" : undefined,
      order: state.value.sort === "price" ? state.value.order : undefined,
      page: state.value.page,
      per_page: 20,
    }),
  { watch: [state], default: () => emptyPage },
);

// Shared with the shell's category menu, so the tree is not refetched.
const { data: categories } = await useAsyncData("shell-categories", () => $api.listCategories());
const allCategories = computed(() => categories.value ?? []);
const byPosition = (a: Category, b: Category): number => a.position - b.position;

const topLevelCategories = computed(() =>
  allCategories.value.filter((category) => category.parent_id === null).sort(byPosition),
);

const replaceQuery = async (patch: Record<string, string | undefined>): Promise<void> => {
  const next: Record<string, string> = {};
  for (const [key, value] of Object.entries({
    q: state.value.q,
    category: state.value.category,
    sort: state.value.sort,
    order: state.value.order,
    page: String(state.value.page),
    ...patch,
  })) {
    if (value) next[key] = value;
  }
  if (next.sort === "default" || next.sort === undefined) {
    delete next.sort;
    delete next.order;
  }
  if (next.page === "1") delete next.page;
  await router.replace({ query: next });
};

const chooseCategory = (id?: string): void => {
  void replaceQuery({ category: id, page: "1" });
};

const chooseSort = (sort: SortType): void => {
  const order: OrderType = state.value.sort === sort && sort !== "default"
    ? state.value.order === "asc" ? "desc" : "asc"
    : "asc";
  void replaceQuery({ sort, order, page: "1" });
};

const categoryById = (id: string): Category | undefined =>
  allCategories.value.find((category) => category.id === id);

const selectedPath = computed(() => {
  const path: Category[] = [];
  let current = state.value.category ? categoryById(state.value.category) : undefined;
  while (current) {
    path.unshift(current);
    current = current.parent_id ? categoryById(current.parent_id) : undefined;
  }
  return path;
});

const categoryChildren = computed(() => {
  const selected = selectedPath.value[selectedPath.value.length - 1];
  return selected
    ? allCategories.value.filter((category) => category.parent_id === selected.id).sort(byPosition)
    : [];
});

const breadcrumbItems = computed(() => [
  { label: t("search.home"), to: "/" },
  {
    label: state.value.q
      ? t("search.searchResults", { keyword: state.value.q })
      : t("search.productList"),
  },
]);

const sortOptions = computed(() => [
  { key: "default" as SortType, label: t("search.defaultSort") },
  { key: "price" as SortType, label: t("search.price") },
]);
</script>

<template>
  <div class="search-page section-bg">
    <UiBreadcrumb :items="breadcrumbItems" />
    <main class="w1200">
      <section class="filter mpanel" :aria-label="t('search.sort')">
        <div class="filter-row">
          <strong>{{ t("search.category") }}</strong>
          <div class="filter-options">
            <button type="button" :class="{ active: !state.category }" @click="chooseCategory()">{{ t("search.all") }}</button>
            <button
              v-for="category in topLevelCategories"
              :key="category.id"
              type="button"
              :class="{ active: category.id === state.category }"
              @click="chooseCategory(category.id)"
            >{{ pick(category.name, locale) }}</button>
            <template v-if="selectedPath.length">
              <button
                v-for="category in selectedPath.slice(1)"
                :key="`path-${category.id}`"
                type="button"
                :class="{ active: category.id === state.category }"
                @click="chooseCategory(category.id)"
              >{{ pick(category.name, locale) }}</button>
            </template>
            <button
              v-for="category in categoryChildren"
              :key="`child-${category.id}`"
              type="button"
              :class="{ active: category.id === state.category }"
              @click="chooseCategory(category.id)"
            >{{ pick(category.name, locale) }}</button>
          </div>
        </div>
        <div class="filter-row sort-row">
          <strong>{{ t("search.sort") }}</strong>
          <div class="filter-options">
            <button
              v-for="option in sortOptions"
              :key="option.key"
              type="button"
              :class="{ active: state.sort === option.key }"
              :aria-label="option.key === state.sort ? (state.order === 'asc' ? t('search.ascending') : t('search.descending')) : undefined"
              @click="chooseSort(option.key)"
            >
              {{ option.label }}
              <span v-if="state.sort === option.key && option.key !== 'default'" aria-hidden="true">{{ state.order === "asc" ? "↑" : "↓" }}</span>
            </button>
          </div>
        </div>
      </section>

      <div class="result-head">
        <span>{{ t("search.resultCount", { n: result.total }) }}</span>
      </div>
      <div v-if="result.items.length" class="product-grid">
        <UiProductCard v-for="product in result.items" :key="product.id" :product="product" />
      </div>
      <UiEmptyState v-else :text="t('search.empty')" />
      <UiPagination :page="result.page" :total="result.total" :per-page="result.per_page" @change="(page) => replaceQuery({ page: String(page) })" />
    </main>
  </div>
</template>

<style scoped>
.search-page {
  min-height: 650px;
  padding-bottom: 50px;
}
.filter {
  background: #fff;
  border: 1px solid var(--mall-line);
  padding: 2px 20px;
}
.filter-row {
  display: flex;
  min-height: 48px;
  align-items: flex-start;
  border-bottom: 1px solid var(--mall-line);
  padding: 12px 0 8px;
}
.filter-row:last-child {
  border-bottom: 0;
}
.filter-row strong {
  width: 90px;
  flex: 0 0 90px;
  color: var(--mall-ink);
  font-size: 13px;
  line-height: 28px;
}
.filter-options {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
}
.filter-options button {
  border: 0;
  background: transparent;
  color: var(--mall-muted);
  cursor: pointer;
  font-size: 13px;
  line-height: 28px;
  padding: 0 10px;
}
.filter-options button:hover,
.filter-options button.active {
  background: var(--mall-red);
  color: #fff;
  border-radius: var(--mall-radius);
}
.sort-row .filter-options button {
  min-width: 60px;
}
.result-head {
  color: var(--mall-muted);
  font-size: 13px;
  padding: 22px 2px 12px;
}
.product-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}
@media (max-width: 900px) {
  .product-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
</style>