Quantity discounts - change product price on product page when selected quantity

[hakeryk2]

Hello!

I have Prestashop 1.6.1.18 and I heard that when You have set quantity discounts then price in front office product page should change when customer will set quantity before adding product to cart.

Example: Set 4€ discount when 4 or more in cart. On product page I have 1 pcsand regular price 49€. When I change with this + button to 4 pcs price on product page should be 45€ but it is still 49. 

Proper price is shown when added to cart in cart page but not on product page. I only see this table on the bottom.

Any idea what is wrong? Console browser is not saying anything. Where in product.js is code responsible for this? I can't find code responsible for this action in this file. 

Actually - I can  try do this in jquery but I am asking if this is built in prestashop to not make effort

[joseantgv]

35 minutes ago, hakeryk2 said:

Hello!

I have Prestashop 1.6.1.18 and I heard that when You have set quantity discounts then price in front office product page should change when customer will set quantity before adding product to cart.

Example: Set 4€ discount when 4 or more in cart. On product page I have 1 pcsand regular price 49€. When I change with this + button to 4 pcs price on product page should be 45€ but it is still 49. 

Proper price is shown when added to cart in cart page but not on product page. I only see this table on the bottom.

Any idea what is wrong? Console browser is not saying anything. Where in product.js is code responsible for this? I can't find code responsible for this action in this file. 

Actually - I can  try do this in jquery but I am asking if this is built in prestashop to not make effort

 

Yes, default theme have this functionality. Maybe it's a problem with your theme?

 

[hakeryk2]

Just now, joseantgv said:

 

Yes, default theme have this functionality. Maybe it's a problem with your theme?

 

It is edited just a little bit so this is why I asked about where are lines responsible for this behavior  I will go and check. I saw displayDiscounts(), updateDiscountTable() functions in product.js but I didn't see any function responsible for changing price. I compared mine product.js to the same file from original default-bootstrap 1.6.1.18 product.js file and I don't see any difference.

Which functions are reposible for this change?

[hakeryk2]

Ok, I didn' mentioned that I want this for product that have combinations and multiple conditions, 2 for all for combinations and 1 for specific attribute.

I found out something weird. I downloaded 1.6.1.18 package and there was in function in front/ProductController.php assignPriceAndTax() and in original 1.6.1.18 file it looks like this. Look for line

 

protected function assignPriceAndTax()
    {
        $id_customer = (isset($this->context->customer) ? (int)$this->context->customer->id : 0);
        $id_group = (int)Group::getCurrent()->id;
        $id_country = $id_customer ? (int)Customer::getCurrentCountry($id_customer) : (int)Tools::getCountry();

        $group_reduction = GroupReduction::getValueForProduct($this->product->id, $id_group);
        if ($group_reduction === false) {
            $group_reduction = Group::getReduction((int)$this->context->cookie->id_customer) / 100;
        }

        // Tax
        $tax = (float)$this->product->getTaxesRate(new Address((int)$this->context->cart->{Configuration::get('PS_TAX_ADDRESS_TYPE')}));
        $this->context->smarty->assign('tax_rate', $tax);

        $product_price_with_tax = Product::getPriceStatic($this->product->id, true, null, 6);
        if (Product::$_taxCalculationMethod == PS_TAX_INC) {
            $product_price_with_tax = Tools::ps_round($product_price_with_tax, 2);
        }
        $product_price_without_eco_tax = (float)$product_price_with_tax - $this->product->ecotax;

        $ecotax_rate = (float)Tax::getProductEcotaxRate($this->context->cart->{Configuration::get('PS_TAX_ADDRESS_TYPE')});
        if (Product::$_taxCalculationMethod == PS_TAX_INC && (int)Configuration::get('PS_TAX')) {
            $ecotax_tax_amount = Tools::ps_round($this->product->ecotax * (1 + $ecotax_rate / 100), 2);
        }
	else {
	    $ecotax_tax_amount = Tools::ps_round($this->product->ecotax, 2);
	}

        $id_currency = (int)$this->context->cookie->id_currency;
        $id_product = (int)$this->product->id;
        $id_shop = $this->context->shop->id;

        $quantity_discounts = SpecificPrice::getQuantityDiscounts($id_product, $id_shop, $id_currency, $id_country, $id_group, null, true, (int)$this->context->customer->id);
        foreach ($quantity_discounts as &$quantity_discount) {
            if (!isset($quantity_discount['base_price'])) {
                $quantity_discount['base_price'] = 0;
            }
            if ($quantity_discount['id_product_attribute']) {
                $quantity_discount['base_price'] = $this->product->getPrice(Product::$_taxCalculationMethod == PS_TAX_INC, $quantity_discount['id_product_attribute']);

                $combination = new Combination((int)$quantity_discount['id_product_attribute']);
                $attributes = $combination->getAttributesName((int)$this->context->language->id);
                foreach ($attributes as $attribute) {
                    $quantity_discount['attributes'] = $attribute['name'].' - ';
                }
                $quantity_discount['attributes'] = rtrim($quantity_discount['attributes'], ' - ');
            }
            if ((int)$quantity_discount['id_currency'] == 0 && $quantity_discount['reduction_type'] == 'amount') {
                $quantity_discount['reduction'] = Tools::convertPriceFull($quantity_discount['reduction'], null, Context::getContext()->currency);
            }
        }

        $address = new Address($this->context->cart->{Configuration::get('PS_TAX_ADDRESS_TYPE')});
        $this->context->smarty->assign(array(
            'quantity_discounts' => $this->formatQuantityDiscounts($quantity_discounts, null, (float)$tax, $ecotax_tax_amount),
            'ecotax_tax_inc' => $ecotax_tax_amount,
            'ecotax_tax_exc' => Tools::ps_round($this->product->ecotax, 2),
            'ecotaxTax_rate' => $ecotax_rate,
            'productPriceWithoutEcoTax' => (float)$product_price_without_eco_tax,
            'group_reduction' => $group_reduction,
            'no_tax' => Tax::excludeTaxeOption() || !$this->product->getTaxesRate($address),
            'ecotax' => (!count($this->errors) && $this->product->ecotax > 0 ? Tools::convertPrice((float)$this->product->ecotax) : 0),
            'tax_enabled' => Configuration::get('PS_TAX') && !Configuration::get('AEUC_LABEL_TAX_INC_EXC'),
            'customer_group_without_tax' => Group::getPriceDisplayMethod($this->context->customer->id_default_group),
        ));
    }

There is a code

if (!isset($quantity_discount['base_price'])) {
	$quantity_discount['base_price'] = 0;
}

Why? I changed this to 

$quantity_discount['base_price'] = $this->product->getPrice(Product::$_taxCalculationMethod == PS_TAX_INC, $quantity_discount['id_product_attribute']);

due to some github solution and now everything works ok.

And if someone is looking for code responsible for this in product.js this is in findSpecificPrice() function.

[joseantgv]

Check function updatePrice from product.js.

Edited February 26, 2018 by joseantgv (see edit history)

[hakeryk2]

3 hours ago, joseantgv said:

Check function updatePrice from product.js.

It was findSpecificPrice()  Thank You.