ebayShop/app/Http/Controllers/MessageController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\Message;
use Auth;

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

    /**
     * Show the form for creating a new resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function create()
    {
        //
    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function store(Request $request)
    {
        $message = new Message;
        $message->conversation_id = $request->conversation_id;
        $message->user_id = Auth::user()->id;
        $message->message = $request->message;
        $message->save();
        $conversation = $message->conversation;
        if ($conversation->sender_id == Auth::user()->id) {
            $conversation->receiver_viewed ="1";
        }
        elseif($conversation->receiver_id == Auth::user()->id) {
            $conversation->sender_viewed ="1";
        }
        $conversation->save();
        
        return back();
    }

    /**
     * Display the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function show($id)
    {
        //
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function edit($id)
    {
        //
    }

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

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