YwxAppThink/addon/articles/controller/backend/Topic.php

<?php
// +----------------------------------------------------------------------
// | YwxApp [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2026-2036 http://ywxapp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Author: ywxapp<admin@ywxapp.cn>
// +----------------------------------------------------------------------
declare (strict_types = 1);

namespace addon\articles\controller\backend;

use addon\articles\library\ArticleSchema;
use addon\articles\model\Article as ArticleModel;
use addon\articles\model\ArticleTopic;
use addon\articles\model\ArticleTopicArticle;
use think\facade\Cache;
use think\facade\Request;
use think\facade\View;
use think\Validate;
use ywxapp\controller\BackendBase;

/**
 * 文章专题管理（运营聚合页）
 */
class Topic extends BackendBase
{
    protected $noNeedVerify = [];

    protected function initialize()
    {
        parent::initialize();
        ArticleSchema::ensure();
    }

    public function index()
    {
        if (Request::isAjax()) {
            $page  = Request::param('page', 1);
            $limit = Request::param('limit', 15);

            $paginator = ArticleTopic::order('sort', 'desc')->order('id', 'desc')
                ->paginate(['list_rows' => $limit, 'page' => $page]);

            $rows = [];
            foreach ($paginator->items() as $t) {
                $rows[] = [
                    'id'            => $t->id,
                    'title'         => $t->title,
                    'alias'         => $t->alias,
                    'sort'          => (int) $t->sort,
                    'status'        => $t->status,
                    'article_count' => ArticleTopicArticle::where('tid', $t->id)->count(),
                    'create_at'     => $t->create_at,
                    'edit_url'      => (string) url('articles/backend/topic/edit', ['id' => $t->id]),
                ];
            }

            return json(['code' => 0, 'msg' => '', 'count' => $paginator->total(), 'data' => $rows]);
        }

        return View::fetch('topic/index');
    }

    public function save()
    {
        if (Request::isPost()) {
            return $this->update(0);
        }
        return View::fetch('topic/edit', ['topic' => null, 'picked' => []]);
    }

    public function edit($id = null)
    {
        $topic = ArticleTopic::find($id);
        if (!$topic) {
            return redirect((string) url('articles/backend/topic/index'));
        }

        $ids    = ArticleTopicArticle::articleIdsOf((int) $topic->id);
        $picked = $ids
            ? ArticleModel::whereIn('id', $ids)->field('id,title')->select()->toArray()
            : [];

        return View::fetch('topic/edit', ['topic' => $topic, 'picked' => $picked]);
    }

    public function update($id = 0)
    {
        $data = Request::post();
        $id   = $id ?: (int) ($data['id'] ?? 0);
        $data['update_at'] = time();
        $data['status']    = isset($data['status']) ? 1 : 0;

        $validate = new Validate([
            'title|标题' => 'require|max:100',
            'alias|别名' => 'require|max:50',
        ]);
        if (!$validate->check($data)) {
            return json(['code' => 0, 'msg' => $validate->getError()]);
        }

        // 关联文章：逗号分隔的文章ID（顺序即专题内排序）
        $articleIds = array_values(array_filter(array_map('intval', explode(',', (string) ($data['article_ids'] ?? '')))));

        $allow = ['title', 'alias', 'description', 'cover', 'sort', 'status', 'create_at', 'update_at'];

        try {
            if ($id) {
                $topic = ArticleTopic::find($id);
                if (!$topic) {
                    return json(['code' => 0, 'msg' => '专题不存在']);
                }
                $topic->allowField($allow)->save($data);
            } else {
                $data['create_at'] = time();
                $topic = ArticleTopic::create($data, $allow);
                $id    = $topic->id;
            }
        } catch (\Throwable $e) {
            // alias 上有唯一键 uk_alias
            return json(['code' => 0, 'msg' => '保存失败：别名可能已存在']);
        }

        ArticleTopicArticle::syncArticles((int) $id, $articleIds);

        // 前台专题聚合页有缓存，写操作后立即失效
        Cache::delete('articles:topics');

        return json([
            'code' => 1,
            'msg'  => '保存成功',
            'url'  => (string) url('articles/backend/topic/index'),
        ]);
    }

    public function delete($id = 0)
    {
        $id   = (int) ($id ?: Request::post('id', 0));
        $topic = ArticleTopic::find($id);
        if (!$topic) {
            return json(['code' => 0, 'msg' => '专题不存在']);
        }

        $topic->delete();
        ArticleTopicArticle::where('tid', $id)->delete();
        Cache::delete('articles:topics');

        return json(['code' => 1, 'msg' => '已删除']);
    }
}