kknongchang_2506/app/Module/GameItems/AdminControllers/CategoryController.php

<?php

namespace App\Module\GameItems\AdminControllers;

use App\Module\GameItems\Models\ItemCategory;
use Dcat\Admin\Form;
use Dcat\Admin\Grid;
use Dcat\Admin\Show;
use Dcat\Admin\Layout\Row;
use Dcat\Admin\Tree;
use Dcat\Admin\Layout\Content;
use Spatie\RouteAttributes\Attributes\Resource;
use UCore\DcatAdmin\AdminController;

#[Resource('game-items-categories', names: 'dcat.admin.game-items-categories')]
class CategoryController extends AdminController
{
    /**
     * 标题
     *
     * @var string
     */
    protected $title = '物品分类管理';

    /**
     * 首页
     *
     * @param Content $content
     * @return Content
     */
    public function index(Content $content)
    {
        return $content
            ->header($this->title)
            ->description('分类列表')
            ->body(function (Row $row) {
                $tree = new Tree(new ItemCategory());

                $tree->branch(function ($branch) {
                    $icon = $branch['icon'] ? "<img src='{$branch['icon']}' width='30' height='30'>" : '';

                    return "{$icon} {$branch['name']} ({$branch['code']})";
                });

                $row->column(12, $tree);
            });
    }

    /**
     * 列表页
     *
     * @return Grid
     */
    protected function grid()
    {
        return Grid::make(new ItemCategory(), function (Grid $grid) {
            $grid->column('id', 'ID')->sortable();
            $grid->column('name', '名称');
            $grid->column('code', '编码');
            $grid->column('icon', '图标')->image('', 50, 50);
            $grid->column('sort', '排序')->sortable();
            $grid->column('parent.name', '父分类');
            $grid->column('created_at', '创建时间');
            $grid->column('updated_at', '更新时间');

            // 筛选
            $grid->filter(function ($filter) {
                $filter->equal('id', 'ID');
                $filter->like('name', '名称');
                $filter->like('code', '编码');
                $filter->equal('parent_id', '父分类')->select(
                    ItemCategory::pluck('name', 'id')
                );
            });
        });
    }

    /**
     * 详情页
     *
     * @param mixed $id
     * @return Show
     */
    protected function detail($id)
    {
        return Show::make(ItemCategory::findOrFail($id), function (Show $show) {
            $show->field('id', 'ID');
            $show->field('name', '名称');
            $show->field('code', '编码');
            $show->field('icon', '图标')->image();
            $show->field('sort', '排序');
            $show->field('parent.name', '父分类');
            $show->field('created_at', '创建时间');
            $show->field('updated_at', '更新时间');

            // 显示子分类
            $show->children('子分类', function ($children) {
                $children->resource('/admin/game-items-categories');
                $children->id('ID');
                $children->name('名称');
                $children->code('编码');
                $children->icon('图标')->image('', 50, 50);
                $children->sort('排序');
            });

            // 显示分类下的物品
            $show->items('物品', function ($items) {
                $items->resource('/admin/game-items');
                $items->id('ID');
                $items->name('名称');
                $items->icon('图标')->image('', 50, 50);
                $items->type('类型');
                $items->rarity('稀有度');
            });
        });
    }

    /**
     * 表单
     *
     * @return Form
     */
    protected function form()
    {
        return Form::make(new ItemCategory(), function (Form $form) {
            $form->text('name', '名称')->required();
            $form->text('code', '编码')->required()->help('用于系统识别的唯一编码');
            $form->image('icon', '图标')
                ->uniqueName()
                ->autoUpload();
            $form->number('sort', '排序')
                ->default(0)
                ->help('数字越小越靠前');

            // 父分类选择，排除自己及其子分类
            $form->select('parent_id', '父分类')
                ->options(function () use ($form) {
                    $categories = ItemCategory::all();
                    $options = [0 => '无'];

                    // 如果是编辑状态，需要排除自己及其子分类
                    if ($form->isEditing()) {
                        $id = $form->getKey();
                        $childrenIds = $this->getChildrenIds($id);
                        $childrenIds[] = $id;

                        foreach ($categories as $category) {
                            if (!in_array($category->id, $childrenIds)) {
                                $options[$category->id] = $category->name;
                            }
                        }
                    } else {
                        foreach ($categories as $category) {
                            $options[$category->id] = $category->name;
                        }
                    }

                    return $options;
                })
                ->default(0);
        });
    }

    /**
     * 获取所有子分类ID
     *
     * @param int $categoryId
     * @return array
     */
    protected function getChildrenIds(int $categoryId): array
    {
        $ids = [];
        $children = ItemCategory::where('parent_id', $categoryId)->get();

        foreach ($children as $child) {
            $ids[] = $child->id;
            $ids = array_merge($ids, $this->getChildrenIds($child->id));
        }

        return $ids;
    }
}