mtb_store_frontend/app/Http/Controllers/ProductController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Services\LiquidRenderer;
use App\Models\DistProduct;
use App\Models\DistProductCategory; // 引入分类模型


class ProductController extends Controller
{
    protected $liquidRenderer;

    public function __construct(LiquidRenderer $liquidRenderer)
    {
        $this->liquidRenderer = $liquidRenderer;
    }

    /**
     * Display a listing of the products.
     *
     * @return \Illuminate\Http\Response
     */
//    public function index()
//    {
//        $products = Product::paginate(10); // 每页显示10个产品
//        return $this->liquidRenderer->render('products.index', ['products' => $products]);
//    }

    public function category($slug)
    {
        // 获取分类信息
        // 获取分类信息，并限定 dist_id
        $slugs = [];
        if (strpos($slug, ',') !== false) {
            // 包含逗号
            $slugs = explode(',', $slug);
        } else {
            // 不包含逗号
            $slugs = [$slug];
        }

        $categoryIds = [];
        foreach ($slugs as $slug) {
            $category = DistProductCategory::where(function ($query) use ($slug) {
                $query->where('slug', $slug)
                    ->orWhere('id', $slug);
            })
                ->where('dist_id', getDistId())
                ->firstOrFail();
            $categoryIds[] = $category->id;
        }

        if (empty($categoryIds)) {
            abort('404');
        }

        if ($categoryIds) {
            //找下一级分类
            foreach ($categoryIds as $id) {
                $subCategories = DistProductCategory::where('parent_id', $id)->get();
                foreach ($subCategories as $subCategory) {
                    $categoryIds[] = $subCategory->id;
                }
            }
        }

        // 获取分类下的所有产品，排序，然后进行分页
        $products = DistProduct::whereIn('category_id', $categoryIds)
            ->where('dist_id', getDistId())
            ->where('enabled', 1)
            ->where('status', 2)
            ->with('images') // Eager load images
            ->orderBy('order', 'desc') // 按 order 字段降序排序
            ->orderBy('id', 'desc') // 按 id 降序排序
            ->paginate(12);



        // 创建分页数据结构
        $paginator = [
            'previous_page' => $products->previousPageUrl() ? true : false, // 是否有上一页
            'previous_page_url' => $products->previousPageUrl(), // 上一页的 URL
            'next_page' => $products->nextPageUrl() ? true : false, // 是否有下一页
            'next_page_url' => $products->nextPageUrl(), // 下一页的 URL
            'current_page' => $products->currentPage(), // 当前页
            'total_pages' => $products->lastPage(), // 总页数
            'pages' => range(1, $products->lastPage()), // 页码数组
            'page_url' => array_combine(
                range(1, $products->lastPage()),
                array_map(fn($page) => $products->url($page), range(1, $products->lastPage()))
            ), // 每页的 URL
        ];

        // 构建导航数据 开始
        $breadcrumbs = [
            [
                'url' => '/',
                'name' => 'Home',
            ]
        ];


        $breadcrumbs[] = [
            'url' => '#',
            'name' => $category->name,
        ];

        // 构建缓存键
        $cacheKey = "product_category_{$category->id}_page_{$products->currentPage()}";

        // 渲染模板并传递数据
        return $this->liquidRenderer->render('products_categories.liquid', [
            'category' => $category, // 分类名称
            'products' => $products,           // 分类下的产品
            'paginator' => $paginator, // 分页信息
            'breadcrumbs' => $breadcrumbs,
        ], $cacheKey);

    }

    /**
     * 产品详情
     * Display the specified product.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function detail($id)
    {
        $product = DistProduct::getProduct($id);

        if(!$product)
        {
            $product = DistProduct::getProductSlug($id);
            if(!$product)
            {
                abort('404');
            }
        }

        // 获取改产品分类下的相关产品,不包当前产品，限制条数 limit 4
        $relatedProducts = DistProduct::where('category_id',  $product->category_id)
            ->where('dist_id', getDistId())
            ->where('enabled', 1)
            ->where('status', 2)
            ->where('id', '<>', $product->id)
            ->with('images') // Eager load images
            ->orderBy('order', 'desc') // 按 order 字段降序排序
            ->orderBy('id', 'desc') // 按 id 降序排序
            ->limit(4)
            ->get();


        // 构建导航数据 开始
        $category=$product->distProductCategory;
        $categoryUrl = $category->slug ? "/products/categories/{$category->slug}" : "/products/categories/{$category->id}";

        $breadcrumbs = [
            [
                'url' => '/',
                'name' => 'Home',
            ]
        ];

        $breadcrumbs[] = [
            'url' => $categoryUrl,
            'name' => $category->name,
        ];

        $breadcrumbs[] = [
            'url' => '#',
            'name' => $product->title,
        ];


        // 渲染模板并传递数据
        return $this->liquidRenderer->render('products_detail.liquid',
            [
                'product' => $product,
                'relatedProducts' => $relatedProducts,
                'breadcrumbs' => $breadcrumbs,
            ]);
    }
}