CartItem::__construct PHP Method

    public function __construct($id, PageAbstract $product, $quantity)
    {
        $variant = false;
        // Break cart ID into uri, variant, and option (:: is used as a delimiter)
        $id_array = explode('::', $id);
        // Set variant and option
        $variantName = $id_array[1];
        $variants = $product->variants()->yaml();
        foreach ($variants as $key => $array) {
            if (str::slug($array['name']) === $variantName) {
                $variant = $variants[$key];
            }
        }
        $this->id = $id;
        $this->sku = $variant['sku'];
        $this->uri = $product->uri();
        $this->name = $product->title()->value;
        $this->variant = str::slug($variant['name']);
        $this->option = $id_array[2];
        $this->amount = $variant['price'];
        $this->sale_amount = salePrice($variant);
        $this->weight = $variant['weight'];
        $this->quantity = $quantity;
        $this->noshipping = $product->noshipping()->value;
        $this->notax = $product->notax()->exists() ? $product->notax()->value : 0;
        // Legacy. notax() field removed in Shopkit 1.1
    }