mint/app/Http/Controllers/NavArticleController.php

<?php

namespace App\Http\Controllers;

use App\Models\ArticleCollection;
use Illuminate\Http\Request;
use App\Http\Resources\ArticleMapResource;

class NavArticleController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index()
    {
        //
    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function store(Request $request)
    {
        //
    }

    /**
     * Display the specified resource.
     * 文章导航
     * 文集中 某个文章的 前一个，后一个
     * @param  \App\Models\ArticleCollection  $articleCollection
     * @return \Illuminate\Http\Response
     */
    public function show(string $id)
    {
        //article_anthology
        $id = explode('_',$id);
        if(count($id) !== 2){
            return $this->error('参数错误。参数应为 2 实际得到'.count($id),400,400);
        }
        $curr = ArticleCollection::where('collect_id',$id[1])
                                ->where('article_id',$id[0])
                                ->first();
        if(!$curr){
            return $this->error('article not found');
        }
        $data = array();
        $data['curr'] = new ArticleMapResource($curr);
        $prev = ArticleCollection::where('id','<',$curr->id)
                                ->orderBy('id','desc')
                                ->first();
        if($prev && $prev->level === $curr->level){
            $data['prev'] = new ArticleMapResource($prev);
        }
        $next = ArticleCollection::where('id','>',$curr->id)
                ->orderBy('id')
                ->first();
        if($next && $next->level === $curr->level){
            $data['next'] = new ArticleMapResource($next);
        }
        return $this->ok($data);
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \App\Models\ArticleCollection  $articleCollection
     * @return \Illuminate\Http\Response
     */
    public function update(Request $request, ArticleCollection $articleCollection)
    {
        //
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  \App\Models\ArticleCollection  $articleCollection
     * @return \Illuminate\Http\Response
     */
    public function destroy(ArticleCollection $articleCollection)
    {
        //
    }
}