pewc_update_quantity_dropdowns.php

<?php
add_action( 'wp_footer', function() {
?>
  <style>
  .pewc-has-extra-fields .pewc-item-products-radio-list[data-product-quantity-select="1"] .pewc-radio-wrapper .pewc-radio-list-label-wrapper {
	display: none !important;
}
.pewc-has-extra-fields .pewc-item-products-radio-list[data-product-quantity-select="1"] .pewc-child-quantity-field-select {
	width: 50px !important;
	margin-left: auto;
}
.pewc-has-extra-fields .pewc-item-products-radio-list[data-product-quantity-select="1"] .pewc-radio-list-desc-wrapper {
	padding-left: 0 !important;
}
  </style>
<script>	
jQuery(document).ready(function($) {
    
    $('.pewc-item').change(function(e) {
        pewc_update_quantity_dropdowns();
    });
    
    function pewc_update_quantity_dropdowns() {

        let groups_fields = [];
        let quantity_dropdowns_total = 0;

        $('.pewc-group-wrap:not(.pewc-form-field-clone) .pewc-item[data-product-quantity-select="1"]').each( function(i, el ) {
            let group_id = $(el).closest('.pewc-group-wrap').attr('data-group-id');
            if ( ! groups_fields[group_id] ) {
                groups_fields[group_id] = [];
            }
            groups_fields[group_id].push( $(el) );
            quantity_dropdowns_total++;
        });
        
        if ( quantity_dropdowns_total ) {
        
            let min;
            let max;
            let select_placeholder = '0';

            groups_fields.forEach( function( fields, group_id ) {
                
                fields.forEach( function( field ) {
                    
                    let $qty_field = field.find('.pewc-child-quantity-field.pewc-independent-quantity-field');
                    $qty_field.hide();

                    let dropdown_field = 'pewc-child-quantity-field-select-' + field.attr('data-field-id');
                    let $select = $('<select class="pewc-child-quantity-field-select ' + dropdown_field +' pewc-independent-quantity-field"></select>');
                    
                    min = field.attr('data-min-products-select') != '' ? parseInt( field.attr('data-min-products-select') ) : 1;
                    max = field.attr('data-max-products-select') != '' ? parseInt( field.attr('data-max-products-select') ) : 2;

                    $select.append( '<option value="0">'+ select_placeholder +'</option>' );
                    for ( let i = min; i <= max; i++ ) {
                        $select.append( '<option value="' + i + '">' + i + '</option>' );
                    }
                    
                    if ( field.find('.'+dropdown_field).length == 0 ) {
                        field.find('.pewc-radio-list-desc-wrapper').after( $select );
                    }

                });
            });

            $('.pewc-child-quantity-field-select').change( function( e ) {
                let disable_items = $(this).closest('.pewc-item').attr('data-product-disable-items') == '1' ? true : false;
                let qty = $(this).val();
                $(this).closest('.pewc-item').find('.pewc-child-quantity-field').val( qty );

                if ( ! disable_items ) {
                    return;
                }
                // $(this).closest('.pewc-group-wrap').find('.pewc-child-quantity-field-select').prop('disabled', (qty > 0) );
                $(this).closest('.pewc-radio-list-wrapper').find('.pewc-child-quantity-field-select').prop('disabled', (qty > 0) );
                
                $(this).prop('disabled', false);
                // $(this).closest('.pewc-group-wrap').find('.pewc-radio-form-field').prop('checked', false);
                $(this).closest('.pewc-radio-list-wrapper').find('.pewc-radio-form-field').prop('checked', false);
                $(this).parent().find('.pewc-radio-form-field').prop('checked', (qty > 0) );
            });
            $('.pewc-radio-form-field').change( function(e) {
                let select = $(this).closest('.pewc-radio-wrapper').find('.pewc-child-quantity-field-select');
                let qty = select.val();
                
                $(this).closest('.pewc-group-wrap').find('.pewc-radio-form-field').prop('checked', false);
                $(this).prop('checked', true);
                $(this).closest('.pewc-item').find('.pewc-child-quantity-field').val( qty );
            });

        }
    
    }

    pewc_update_quantity_dropdowns();
    
});
</script>
<?php
} );


add_filter( 'pewc_filter_item_attributes', function( $attributes, $item ) {

    $quantity_dropdown = apply_filters( 'product_quantity_select', false, $item );
    if ( ! $quantity_dropdown ) {
        return $attributes;
    }

    $attributes['data-product-quantity-select'] = $quantity_dropdown;
    $attributes['data-product-disable-items'] = apply_filters( 'product_quantity_disable_items', true, $item );
    $attributes['data-min-products-select'] = apply_filters( 'min_products_select', 1, $item );
    $attributes['data-max-products-select'] = apply_filters( 'max_products_select', 2, $item );

    return $attributes;

}, 10, 2 );


add_filter( 'product_quantity_select', function( $quantity_dropdown, $item ) {
    if ( $item['field_type'] == 'products' && $item['products_layout'] == 'radio-list' && $item['products_quantities'] == 'independent' ) {
        $quantity_dropdown = true;
    }
    return $quantity_dropdown;
}, 10, 2 );

add_filter( 'product_quantity_disable_items', function( $quantity_dropdown_disable_items, $item ) {
    // $quantity_dropdown_disable_items = false;    
    return $quantity_dropdown_disable_items;
}, 10, 2 );

add_filter( 'min_products_select', function( $min_products, $item ) {
    // $min_products = 2;
    return $min_products;
}, 10, 2 );

add_filter( 'max_products_select', function( $max_products, $item ) {
    // $max_products = 5;
    return $max_products;
}, 10, 2 );