journal-intime/app/Http/Controllers/HomeController.php

<?php

namespace App\Http\Controllers;

use App\Post;
use App\PostsTag;
use App\Services\TagDetectorService;
use App\Tag;
use DateTime;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Redirect;

class HomeController extends Controller
{
    /**
     * Create a new controller instance.
     *
     * @return void
     */
    public function __construct()
    {
        $this->middleware('auth');
    }

    /**
     * Show the application dashboard.
     *
     * @return \Illuminate\Contracts\Support\Renderable
     */
    public function index()
    {
        setlocale(LC_TIME, 'fr_FR.utf8');
        $today = new DateTime();
        $user_id = Auth::user()->getAuthIdentifier();
        $all_counts = Post::where('user_id', $user_id)->count();
        $year_counts = Post::where('user_id', $user_id)->whereYear('date_post', $today->format('Y'))->count();
        $month_counts = Post::where('user_id', $user_id)
            ->whereYear('date_post', $today->format('Y'))
            ->whereMonth('date_post', $today->format('m'))->count();
        $image_counts = 0; // TODO #4
        $posts = Post::where('user_id', $user_id)->orderBy('date_post', 'DESC')->limit(9)->get();
        $today_post = Post::whereDate('date_post', '=', $today->format('Y-m-d'))
            ->where('user_id', $user_id)
            ->count();

        $already = false;
        if ($today_post > 0) {
            $already = true;
        }

        return view('home', [
            'already' => $already,
            'all_counts' => $all_counts,
            'year_counts' => $year_counts,
            'month_counts' => $month_counts,
            'image_counts' => $image_counts,
            'today' => $today,
            'posts' => $posts,
        ]);
    }

    public function store(TagDetectorService $tag_detector)
    {
        $today = new DateTime();

        $data = request()->validate([
            'message' => 'required'
        ]);

        $data = [
            'user_id'   => Auth::user()->getAuthIdentifier(),
            'date_post' => new DateTime(), // Take back the date from the form ?
            'content'   => $data['message'],
        ];

        $tags = $tag_detector->detectFrom($data['content']);

        $check = Post::create($data);
        $all_tags = Tag::all();
        $all_tags_names = [];
        foreach ($all_tags as $tag) {
            $all_tags_names[$tag->id] = $tag->name;
        }

        foreach ($tags as $tag) {
            if (in_array($tag, $all_tags_names)) {
                PostsTag::create([
                    'post_id' => $check->id,
                    'tag_id' => array_search($tag, $all_tags_names),
                ]);
            }
        }

        return Redirect::to('home')->withSuccess('Great! Form successfully submit with validation.');
    }
}