Promo endpoint that display only products on sale.

src/Models/Product.php

@@ -5,6 +5,7 @@ namespace Krzysiej\RyobiCrawler\Models;
 use Illuminate\Database\Eloquent\Casts\Attribute;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\Relations\HasOne;
 
 /**
  * @property integer $skuID
@@ -28,6 +29,11 @@ class Product extends Model
     {
         return $this->hasMany(Price::class);
     }
+
+    public function currentPrice(): HasOne
+    {
+        return $this->hasOne(Price::class)->latestOfMany('created_at');
+    }
     public function stock(): HasMany
     {
         return $this->hasMany(Stock::class);