Magento 2 How do I sort mini cart items?

Question

I am trying to sort the items based on the product ordered qty.

Is there any logical method to the way cart items are sorted by ordered qty?

Answer 1

You can use getItems() plugin to Sort Quote Items:

Create This Plugin:

MODULE\etc\di.xml

<type name="Magento\Checkout\Block\Cart">
        <plugin name="item_filter" type="[Your]\[Module]\Plugin\Checkout\Block\Cart" />
</type>

MODULE\Plugin\Checkout\Block\Cart:

public function afterGetItems(\Magento\Checkout\Block\Cart $subject){
     $items = [];
     $totalItems = [];
     $itemAdded = [];

     foreach ($subject->getQuote()->getAllItems() as $item) {
        $totalItems[] = $item->getId();

        if(/*Your Condition*/){
            /*you can sort item by qty wise*/
            /*you can get qty using $item->getQty();*/
           $itemAdded[] = $item;
           $items[] = $item;
        }

     }
     $result = array_diff($totalItems, $itemAdded);

     foreach ($result as $quoteid) {
        if($quoteid){
            $item = $this->cart->getQuote()->getItemById($quoteid);
            $items[] = $item;
        }
     }

    return $items;
}

Answer 2

First create a plugin,

In di.xml use :

<type name="Magento\Checkout\CustomerData\Cart">
     <plugin name="SortByQty" type="Vendor\Module\Plugin\Cart"/>
</type>

Then in Cart.php add a function afterGetSectionData,

Now the logic will be done for sorting but i can tell the starting:

public function afterGetSectionData(\Magento\Checkout\CustomerData\Cart $subject, $result){


        $items = $result['items'];

        foreach ($items as $key => $value) {
            $_productId = $value['product_id'];
            $_productPrice = $value['product_price_value'];
            $_productQty = $value['qty'];
            $_productTotal = $_productPrice * $_productQty;
        }

         $data = [
            'items' => $items
         ];

        return $result = array_merge($data, $result);
}