How to apply custom discount of some percentage like (10%,20%) of cart total once he chose use custom discount button and if he want to remove the custom discount from the cart total in front end how can i proceed.
I want to show same as apply discount code section.in frontend
thanks in advance
etc/sales.xml
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Sales:etc/sales.xsd">
<section name="quote">
<group name="totals">
<item name="testdiscount" instance="MagePal\TestDiscount\Model\Quote\Discount" sort_order="500"/>
</group>
</section>
</config>
Discount.php Model file
public function collect(
\Magento\Quote\Model\Quote $quote,
\Magento\Quote\Api\Data\ShippingAssignmentInterface $shippingAssignment,
\Magento\Quote\Model\Quote\Address\Total $total
) {
parent::collect($quote, $shippingAssignment, $total);
//$address = $shippingAssignment->getShipping()->getAddress();
$label = 'My Custom Discount';
$discountAmount = -10;
$appliedCartDiscount = 0;
if($total->getDiscountDescription()) {
// If a discount exists in cart and another discount is applied, the add both discounts.
$appliedCartDiscount = $total->getDiscountAmount();
$discountAmount = $total->getDiscountAmount()+$discountAmount;
$label = $total->getDiscountDescription().', '.$label;
}
$total->setDiscountDescription($label);
$total->setDiscountAmount($discountAmount);
$total->setBaseDiscountAmount($discountAmount);
$total->setSubtotalWithDiscount($total->getSubtotal() + $discountAmount);
$total->setBaseSubtotalWithDiscount($total->getBaseSubtotal() + $discountAmount);
if(isset($appliedCartDiscount)) {
$total->addTotalAmount($this->getCode(), $discountAmount - $appliedCartDiscount);
$total->addBaseTotalAmount($this->getCode(), $discountAmount - $appliedCartDiscount);
} else {
$total->addTotalAmount($this->getCode(), $discountAmount);
$total->addBaseTotalAmount($this->getCode(), $discountAmount);
}
return $this;
}
checkout_cart_index.xml
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
<body>
<referenceBlock name="checkout.cart.totals">
<arguments>
<argument name="jsLayout" xsi:type="array">
<item name="components" xsi:type="array">
<item name="block-totals" xsi:type="array">
<item name="children" xsi:type="array">
<item name="before_grandtotal" xsi:type="array">
<item name="children" xsi:type="array">
<item name="testdiscount" xsi:type="array">
<item name="config" xsi:type="array">
<item name="title" xsi:type="string" translate="true">My Discount</item>
</item>
</item>
</item>
</item>
</item>
</item>
</item>
</argument>
</arguments>
</referenceBlock>
</body>
</page>
checkout_index_index.xml
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" layout="1column" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
<body>
<referenceBlock name="checkout.root">
<arguments>
<argument name="jsLayout" xsi:type="array">
<item name="components" xsi:type="array">
<item name="checkout" xsi:type="array">
<item name="children" xsi:type="array">
<item name="sidebar" xsi:type="array">
<item name="children" xsi:type="array">
<item name="summary" xsi:type="array">
<item name="children" xsi:type="array">
<item name="totals" xsi:type="array">
<item name="children" xsi:type="array">
<item name="testdiscount" xsi:type="array">
<item name="config" xsi:type="array">
<item name="title" xsi:type="string" translate="true">My Discount</item>
</item>
</item>
</item>
</item>
</item>
</item>
</item>
</item>
</item>
</item>
</item>
</argument>
</arguments>
</referenceBlock>
</body>
</page>
You can also refer https://github.com/magepal/stackexchange/tree/develop/104112
From admin panel go to Marketing > Promotions > Cart Price Rules and create a discount rule there.
If you want an advanced function my suggestion:
https://github.com/hodongnhut/magento2-payment-discount
