Controller Comment

<?php

namespace App\Http\Controllers;

use App\Comment;
use Illuminate\Http\Request;

class CommentController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index()
    {
        $comments=Comment::all();
        return response()->json($comments,200);
    }

    /**
     * Show the form for creating a new resource.
     *
     * @return \Illuminate\Http\Response
     */


    /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function store(Request $request)
    {
      $this->validate($request,[
        'title'  => 'required|string|max:50',
        'post' => 'required|string|max:50',
      ]);

      $comments = Comment::create([
        'title'      => $request->title,
        'post'       => $request->post,
      ]);

      return response()->json($comments,200);
    }

    /**
     * Display the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function show($id)
    {
        $comments=Comment::find($id);
        if (is_null($comments)) {
          return response()->json('not found',404);
        }
        return response()->json($comments,200);
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function update(Request $request, $id)
    {
        $comments=Comments::find($id);
        if (!is_null(Input::get('title')))
        {
          $comments->title=Input::get('title');
        }
        if (!is_null(Input::get('post')))
        {
          $comments->post=Input::get('post');
        }
        $success=$comments->save();
        if(!$success){
          return response()->json('error update',500);
        }
        return response()->json('success',201);
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function destroy($id)
    {
        $comments=Comments::find($id);
        if(is_null($comments)){
          return response()->json('not found',404);
        }
        $succes=$comments->delete();
        if(!$success){
          return response()->json('error delete',500);
        }
        return response()->json('success',200);
    }
}