how to refresh mini cart programmatically in magento2

Question

after customer login ,i am add filter on current customer quote, and remove items form quote which are not match. so item are delete successfully but front side in minicart cart item count are not updated .

use : "customer_login" event

Answer 1

You can do it using

Vendor/Module/etc/frontend/sections.xml

file.

<?xml version="1.0"?>

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Customer:etc/sections.xsd">
    <action name="customer/account/logout">
        <section name="cart"/>
    </action>
    <action name="customer/account/loginPost">
        <section name="cart"/>
    </action>
    <action name="customer/account/createPost">
        <section name="cart"/>
    </action>
    <action name="customer/ajax/login">
        <section name="cart"/>
    </action>
    <action name="checkout/cart/add">
        <section name="cart"/>
    </action>
    <action name="checkout/cart/delete">
        <section name="cart"/>
    </action>
    <action name="checkout/cart/updatePost">
        <section name="cart"/>
    </action>
    <action name="checkout/cart/updateItemOptions">
        <section name="cart"/>
    </action>
    <action name="checkout/cart/couponPost">
        <section name="cart"/>
    </action>
    <action name="checkout/cart/estimatePost">
        <section name="cart"/>
    </action>
    <action name="checkout/cart/estimateUpdatePost">
        <section name="cart"/>
    </action>
    <action name="checkout/onepage/saveOrder">
        <section name="cart"/>
        <section name="checkout-data"/>
        <section name="last-ordered-items"/>
    </action>
    <action name="checkout/sidebar/removeItem">
        <section name="cart"/>
    </action>
    <action name="checkout/sidebar/updateItemQty">
        <section name="cart"/>
    </action>
    <action name="rest/*/V1/carts/*/payment-information">
        <section name="cart"/>
        <section name="checkout-data"/>
        <section name="last-ordered-items"/>
    </action>
    <action name="rest/*/V1/guest-carts/*/payment-information">
        <section name="cart"/>
        <section name="checkout-data"/>
    </action>
    <action name="rest/*/V1/guest-carts/*/selected-payment-method">
        <section name="cart"/>
        <section name="checkout-data"/>
    </action>
    <action name="rest/*/V1/carts/*/selected-payment-method">
        <section name="cart"/>
        <section name="checkout-data"/>
    </action>
</config>

In every action your mini cart will refresh.

Answer 2

Solution : i am remove items form quote based on my custom filter after customer login.so i am used customer_login event.

File : Doyenhub\RestrictCustomer\etc\frontend\events.xml

    <event name="customer_login">
        <observer name="customer_login_observer" instance="Doyenhub\RestrictCustomer\Observer\CustomerLoginAfter" />
    </event>

And My Observer class is Doyenhub\RestrictCustomer\Observer\CustomerLoginAfter.php

class CustomerLoginAfter implements ObserverInterface {

        protected $quoteRepository;

        public function __construct(
        \Magento\Quote\Api\CartRepositoryInterface $quoteRepository, \Magento\Quote\Model\Quote\Item $quoteItem
        ) {
            $this->_quoteItem = $quoteItem;
            $this->quoteRepository = $quoteRepository;
        }    

     public function execute(\Magento\Framework\Event\Observer $observer) {
                $customer = $observer->getEvent()->getCustomer();
                $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
                //$quoteId = get quote id 
                $cartData = $objectManager->create('Magento\Quote\Model\QuoteRepository')->get($quoteId);
                $items = $cartData->getAllItems();
                 foreach ($items as $item) 
                 {
                  $quoteItem = $this->_quoteItem->load($item->getItemId());
                  $quoteItem->delete();//delete item
                 }
            //=======referesh quote=======
                 $quote = $this->quoteRepository->get($quoteId);
                 $quote->setCustomerId($customer->getId()); // Whatever you want to update
                 $this->quoteRepository->save($quote);
        }
}