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;
use UCore\DcatAdmin\FilterHelper;
use UCore\DcatAdmin\FormHelper;
use UCore\DcatAdmin\GridHelper;
use UCore\DcatAdmin\ShowHelper;

#[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) {
            $helper = new GridHelper($grid, $this);

        $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) {
            $helper = new FilterHelper($filter, $this);
            $helper->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')
            );
        });

            return $grid;
        });
    }

    /**
     * 详情页
     *
     * @param mixed $id
     * @return Show
     */
    protected function detail($id)
    {
        return Show::make($id, new ItemCategory(), function (Show $show) {
            $helper = new ShowHelper($show, $this);

        $helper->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');
        });

            return $show;
        });
    }

    /**
     * 表单
     *
     * @return Form
     */
    protected function form()
    {
        return Form::make(new ItemCategory(), function (Form $form) {
            $helper = new FormHelper($form, $this);

        $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);

            return $form;
        });
    }

    /**
     * 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;
    }
}