laravel_sketch/app/Modules/Mini/Services/GoodsService.php

<?php

namespace App\Modules\Mini\Services;

use App\Base\BaseService;
use App\Exceptions\ClientException;
use App\Models\Goods\Goods;
use App\Models\Goods\GoodsCategoryMap;
use App\Models\Goods\GoodsSku;
use App\Models\Goods\GoodsSpecMap;
use App\Models\Goods\Spec;
use App\Models\Goods\SpecAttr;
use App\Models\User\UserFav;

class GoodsService extends BaseService
{
    public function info($params)
    {
        $id = $params['id'];
        $goods = Goods::where("status", Goods::STATUS_OK)->where("id", $id)->firstOrFail();

        $goods->view_total++;
        $goods->save();
        return [
            "id" => $goods->id,
            "name" => $goods->name,
            "category_name" => $goods->map->where("is_public", 1)->map(function (GoodsCategoryMap $map) {
                return optional($map->category)->name;
            })->implode("/"),
            "image_list" => $goods->image_list,
            "spec" => array_map(function ($specId) {
                try {
                    /** @var Spec $spec */
                    $spec = Spec::find($specId);
                    return [
                        "id" => $spec->id,
                        "name" => $spec->name,
                        "is_custom" => $spec->is_custom,
                        "attr" => $spec->attrs->map(function (SpecAttr $a) {
                            return [
                                "id" => $a->id,
                                "name" => $a->name,
                            ];
                        }),
                    ];
                } catch (\Exception $e) {
                    throw new ClientException("商品规格有误，请联系管理员");
                }
            }, $goods->spec),
            "desc_html" => $goods->desc_html,
            "faq_html" => $goods->faq_html,
            "spec_attr_html" => $goods->spec_attr_html,
            "is_fav" => (int)$this->goodsIsFav($goods->id),
            "sn" => $goods->sn,
            "url_3d" => $goods->url_3d,
            "spec_map" => $goods->specMap->map(function (GoodsSpecMap $m) {
                return [
                    "id" => $m->id,
                    "spec_id" => $m->spec_id,
                    "value" => $m->value,
                    "name" => $m->spec->name,
                ];
            }),
        ];

    }

    protected function goodsIsFav($gid): bool
    {
        $ret = false;
        $uid = \Auth::id();
        if ($uid) {
            if (UserFav::where("user_id", $uid)->whereGoodsId($gid)->first()) {
                $ret = true;
            }
        }

        return $ret;
    }
}