PostsController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Http\Requests\PostRequest;
use App\Post;
use App\Tag;

class PostsController extends Controller
{
    public function __construct()
    {
        $this->middleware('auth')->except(['index', 'show']);
    }

    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index()
    {
        $posts = Post::latest()
            ->filter(request(['month', 'year']))
            ->simplePaginate(5);

        return view('blog.index', compact('posts'));
    }

    /**
     * Show the form for creating a new resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function create()
    {
        $tags = Tag::all('name', 'id');

        return view('blog.create', compact('tags'));
    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function store(PostRequest $request)
    {
        $this->createPost($request);

        $request->session()->flash('status', 'Your post has been published.');

        return redirect('blog');
    }

    /**
     * Display the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function show(Post $post)
    {
        return view('blog.show', compact('post'));
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function edit(Post $post)
    {
        $tags = Tag::all('name', 'id');

        return view('blog.edit', compact('post', 'tags'));
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function update(Request $request, Post $post)
    {
        $post->update($request->except('tag_list'));

        $this->syncTags($post, $request->input('tag_list'));

        $request->session()->flash('status', 'Your post has been updated.');

        return redirect('blog');
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function destroy($post)
    {
        //
    }

    private function createPost(Request $request)
    {
        $post = auth()->user()->publish(new Post(request(['title', 'body'])));

        $this->syncTags($post, $request->input('tag_list'));

        return $post;
    }

    private function syncTags(Post $post, array $tags)
    {
        $post->tags()->sync($tags);
    }
}