Laravel - How To Make a Product Review?

I want to ask sir :)

my case:

first, the user (buyer) make the payment and successful, want to do a review (no record has been filled in tables reviews in the same product_id) successful .. but the review form is still there, how to remove it for users who have done a review?

can do a review, when the product has not been reviewed #View Image

when the user has done a review, the form is still there #View Image

secondly, the user (another buyer with a different account) makes a purchase and payment (successful), wants to do a review .. can not because there is a record that has been filled for the same product, how to solve this?

can not do a review for a product that already exists a review whereas a different user #View Image

Essentially, if the record review with the same empty product_id, can do a review but the form for the review is still available, but already do a review for the same goods, if the same product_id already, there can not do a review.

thank you :) viewproduct.blade.php

<div role="tabpanel" class="tab-pane fade" id="profile">
<h2>Reviews</h2>
@foreach($reviews as $data)
<div class="panel panel-default">
    <div class="panel-body">
        <h4></h4>
        <p></p>
        <h3></h3>
    </div>
</div>
@endforeach
@if(Auth::user() && Auth::user()->id == $show->order['user_id'])
@if($errors->any())
<div class="alert alert-warning">
<ul>
@foreach($errors->all() as $error)
<li></li>
@endforeach
</ul>
</div>
@endif
//form for review (I cut the code)
@endif
</div>

StoreController.php

public function ViewProduct($id)
{
    $show = Products::findOrFail($id);
    $related = Products::where('kategori_id', $show->kategori_id)
    ->orderByRaw('RAND()')
    ->take(10)
    ->get();
    $reviews = Reviews::where('product_id', $show->id)->get();
    return view('shop.viewproduct', compact('show','related','order','reviews'));
}

public function StoreReviewProduct(Request $request)
{
    $this->validate($request, [
        'rating' => 'required',
        'description' => 'required|min:10',
    ]);
    $addreview = new Reviews([
        'product_id' => $request['product_id'],
        'user_id' => Auth::user()->id,
        'rating' => $request['rating'],
        'description' => $request['description']
    ]);
    $addreview->save();
    Session::flash('success','thanks for adding review!');
    return redirect()->back();
}

Products(Model).php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Products extends Model
{
    protected $fillable = ['kategori_id','nama_product','deskripsi','harga','pict','stok','review','id_kios'];

    public function kios()
    {
        return $this->belongsTo(Kios::class,'id_kios');
    }

    public function order()
    {
        return $this->belongsTo(Orders::class,'id','product_id');
    }
}

thanks a lot for the answer :)

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