urlsnail/app/Http/Controllers/BookmarkController.php

<?php

namespace App\Http\Controllers;

use App\Models\Bookmark;
use App\Models\Tag;
use Illuminate\Http\Request;

class BookmarkController extends Controller
{
    /**
     * Display a listing of the resource.
     */
    public function index()
    {
        return view(
            'bookmarks.index', [
                'bookmarks' => Bookmark::paginate(20),
            ]
        );
    }

    /**
     * Show the form for creating a new resource.
     */
    public function create()
    {
        //
    }

    /**
     * Store a newly created resource in storage.
     */
    public function store(Request $request)
    {
        //
    }

    /**
     * Display the specified resource.
     */
    public function show(Bookmark $bookmark)
    {
        return view(
            'bookmarks.show', [
                'bookmark' => $bookmark,
            ]
        );
    }

    /**
     * Show the form for editing the specified resource.
     */
    public function edit(Bookmark $bookmark)
    {
        return view(
            'bookmarks.edit', [
                'edit' => true,
                'bookmark' => $bookmark,
            ]
        );
    }

    /**
     * Update the specified resource in storage.
     */
    public function update(Request $request, Bookmark $bookmark)
    {
        $bookmark->title = $request->post('title');
        $bookmark->description = $request->post('description', '');
        $bookmark->href = $request->post('href');
        $bookmark->save();

        $tags_input = trim($request->post('tags', ''));
        $tags_input = preg_split('/\s+/', $tags_input);

        $tags = [];
        foreach ($tags_input as $tag_input) {
            $tag = Tag::firstOrCreate(['name' => $tag_input]);
            $tags[$tag->id] = true;
        }

        $bookmark->tags()->sync(array_keys($tags));

        return redirect()->action(
            [self::class, "show"], [
            "bookmark" => $bookmark,
            ]
        );
    }

    /**
     * Remove the specified resource from storage.
     */
    public function destroy(string $id)
    {
        //
    }
}