Magento 2 - Don't want to remove wishlist items when click 'Add all to cart' button

Question

I want to keep items in wishlist when user click "add all to cart" button. Have any idea how to fix it?

Answer 1

Magento adds wishlist items to the cart using the addToCart() method on the wishlist Item class. This method has a parameter that specifies whether to also remove the item from the wishlist. You can add a plugin to this to force this parameter to always be false.

Add this to a custom module di.xml, replacing Namespace\Module with your module name:

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="Magento\Wishlist\Model\Item">
        <plugin name="keep_in_wishlist" type="Namespace\Module\Plugin\KeepItemsInWishlistOnPurchase" />
    </type>
</config>

Then add this plugin to your module:

<?php
namespace Namespace\Module\Plugin;

use Magento\Checkout\Model\Cart;
use Magento\Wishlist\Model\Item;

class KeepItemsInWishlistOnPurchase
{
    /**
     * @param \Magento\Wishlist\Model\Item $item
     * @param \Magento\Checkout\Model\Cart $cart
     * @return array
     */
    public function beforeAddToCart(Item $item, Cart $cart)
    {
        return [$cart, false];
    }
}

Answer 2

AS OF NOW 18 JAN 2020 this observer is not useful, please have a look on @scotts's answer

This is Magento's default functionality, when a product is added to cart it it removed from the wishlist.

You can update this functionality in observer vendor/magento/module-wishlist/Observer/AddToCart.php

which is triggered by checkout_cart_add_product_complete event in vendor/magento/module-checkout/Controller/Cart/Add.php controller.

To stop products removal from wishlist you have to disable this core observer by following way.

Your custom-module's Vendor/Module/etc/events.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
    <event name="checkout_cart_add_product_complete">
        <observer name="wishlist" disabled="true"/>
    </event>
</config>

Answer 3

Please check this extension that matches your ask https://marketplace.magento.com/decryptweb-wishlist.html