In WooCommerce i don’t know about how to get matching variation id in variable product while add to cart

I create a custom wordpress plugin for add to card from users
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this is my output i want to display my selected attribute in cart items but does not found variation_id if anyone know about this please help me to solve this issue

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<code> public function cadc_add_products_to_cart()
{
// function my_update_cookie($logged_in_cookie)
// {
// $_COOKIE[LOGGED_IN_COOKIE] = $logged_in_cookie;
// }
// add_action('set_logged_in_cookie', 'my_update_cookie');
// check_ajax_referer('cadc_add_to_cart_nonce', 'nonce');
if (!is_user_logged_in()) {
wp_send_json_error('You must be logged in to add products to the cart.');
}
$user_id = intval($_POST['user_id']);
$products = $_POST['products'];
if (!is_array($products)) {
wp_send_json_error('Invalid products data.');
}
wp_set_current_user($user_id);
wp_set_auth_cookie($user_id);
if (!WC()->session->has_session()) {
WC()->session->set_customer_session_cookie(true);
}
$variations_data = array();
foreach ($products as $product) {
$product_id = intval($product['product_id']);
$quantity = intval($product['quantity']);
$variation_attributes = isset($product['attributes']) ? $product['attributes'] : array();
$wc_product = wc_get_product($product_id);
if ('variable' === $wc_product->get_type()) {
$selected_attributes = array();
foreach ($variation_attributes as $attribute_name => $attribute_value) {
$taxonomy = str_replace('attribute_', '', $attribute_name);
$selected_attributes[$taxonomy] = $attribute_value;
}
echo '<pre>Selected Attributes for Product ID ' . $product_id . ': ';
print_r($selected_attributes);
echo '</pre>';
$variation_id = $this->get_matching_variation_id($wc_product, $selected_attributes);
if ($variation_id) {
$cart_item_key = WC()->cart->add_to_cart($product_id, $quantity, $variation_id, $selected_attributes);
if (!$cart_item_key) {
wp_send_json_error('Failed to add variable product to cart. Product ID: ' . $product_id . ', Variation ID: ' . $variation_id);
} else {
echo '<pre>Added to cart successfully: ' . $cart_item_key . '</pre>';
}
}
} else {
$cart_item_key = WC()->cart->add_to_cart($product_id, $quantity);
if (!$cart_item_key) {
wp_send_json_error('Failed to add product to cart.');
}
}
}
$cart_items = $this->get_cart_items_for_user($user_id);
wp_send_json_success(array(
'cart_items' => $cart_items,
'variations' => $variations_data,
));
// echo '<pre>';print_r($variations_data);echo'</pre>';die;
}
public function get_matching_variation_id($product, $attributes) {
foreach ($product->get_available_variations() as $variation) {
$match = true;
foreach ($attributes as $taxonomy => $term_slug) {
$variation_attr_key = 'attribute_' . $taxonomy;
// Ensure the attribute key exists in the variation
if (!isset($variation['attributes'][$variation_attr_key]) || $variation['attributes'][$variation_attr_key] != $term_slug) {
$match = false;
break;
}
}
if ($match) {
return $variation['variation_id'];
}
}
return 0; // No matching variation found
}
function cadc_get_product_variations() {
// check_ajax_referer('cadc_add_to_cart_nonce', 'nonce');
$product_id = intval($_POST['product_id']);
$wc_product = wc_get_product($product_id);
if (!$wc_product) {
wp_send_json_error('Invalid product.');
}
$is_variable = $wc_product->is_type('variable');
if (!$is_variable) {
wp_send_json_success(['is_variable' => false]);
}
$variations = [];
$attributes = $wc_product->get_variation_attributes();
foreach ($attributes as $taxonomy => $options) {
$terms = array();
foreach ($options as $option) {
$term = get_term_by('slug', $option, $taxonomy);
if ($term) {
$terms[] = $term->name;
}
}
$variations[$taxonomy] = array(
'label' => wc_attribute_label($taxonomy),
'options' => array_map('esc_html', $terms),
);
}
wp_send_json_success([
'is_variable' => true,
'variations' => $variations
]);
}
private function get_cart_items_for_user($user_id)
{
wp_set_current_user($user_id);
$cart_items = WC()->cart->get_cart();
$response = array();
foreach ($cart_items as $cart_item_key => $cart_item) {
$_product = apply_filters('woocommerce_cart_item_product', $cart_item['data'], $cart_item, $cart_item_key);
$item_data = array(
'product_id' => $_product->get_id(),
'product_name' => $_product->get_name(),
'quantity' => $cart_item['quantity'],
);
if ($_product->is_type('variation')) {
$variation_attributes = wc_get_formatted_variation($_product, true);
$item_data['variations'] = $variation_attributes;
}
$response[] = $item_data;
}
return $response;
}
</code>
<code> public function cadc_add_products_to_cart() { // function my_update_cookie($logged_in_cookie) // { // $_COOKIE[LOGGED_IN_COOKIE] = $logged_in_cookie; // } // add_action('set_logged_in_cookie', 'my_update_cookie'); // check_ajax_referer('cadc_add_to_cart_nonce', 'nonce'); if (!is_user_logged_in()) { wp_send_json_error('You must be logged in to add products to the cart.'); } $user_id = intval($_POST['user_id']); $products = $_POST['products']; if (!is_array($products)) { wp_send_json_error('Invalid products data.'); } wp_set_current_user($user_id); wp_set_auth_cookie($user_id); if (!WC()->session->has_session()) { WC()->session->set_customer_session_cookie(true); } $variations_data = array(); foreach ($products as $product) { $product_id = intval($product['product_id']); $quantity = intval($product['quantity']); $variation_attributes = isset($product['attributes']) ? $product['attributes'] : array(); $wc_product = wc_get_product($product_id); if ('variable' === $wc_product->get_type()) { $selected_attributes = array(); foreach ($variation_attributes as $attribute_name => $attribute_value) { $taxonomy = str_replace('attribute_', '', $attribute_name); $selected_attributes[$taxonomy] = $attribute_value; } echo '<pre>Selected Attributes for Product ID ' . $product_id . ': '; print_r($selected_attributes); echo '</pre>'; $variation_id = $this->get_matching_variation_id($wc_product, $selected_attributes); if ($variation_id) { $cart_item_key = WC()->cart->add_to_cart($product_id, $quantity, $variation_id, $selected_attributes); if (!$cart_item_key) { wp_send_json_error('Failed to add variable product to cart. Product ID: ' . $product_id . ', Variation ID: ' . $variation_id); } else { echo '<pre>Added to cart successfully: ' . $cart_item_key . '</pre>'; } } } else { $cart_item_key = WC()->cart->add_to_cart($product_id, $quantity); if (!$cart_item_key) { wp_send_json_error('Failed to add product to cart.'); } } } $cart_items = $this->get_cart_items_for_user($user_id); wp_send_json_success(array( 'cart_items' => $cart_items, 'variations' => $variations_data, )); // echo '<pre>';print_r($variations_data);echo'</pre>';die; } public function get_matching_variation_id($product, $attributes) { foreach ($product->get_available_variations() as $variation) { $match = true; foreach ($attributes as $taxonomy => $term_slug) { $variation_attr_key = 'attribute_' . $taxonomy; // Ensure the attribute key exists in the variation if (!isset($variation['attributes'][$variation_attr_key]) || $variation['attributes'][$variation_attr_key] != $term_slug) { $match = false; break; } } if ($match) { return $variation['variation_id']; } } return 0; // No matching variation found } function cadc_get_product_variations() { // check_ajax_referer('cadc_add_to_cart_nonce', 'nonce'); $product_id = intval($_POST['product_id']); $wc_product = wc_get_product($product_id); if (!$wc_product) { wp_send_json_error('Invalid product.'); } $is_variable = $wc_product->is_type('variable'); if (!$is_variable) { wp_send_json_success(['is_variable' => false]); } $variations = []; $attributes = $wc_product->get_variation_attributes(); foreach ($attributes as $taxonomy => $options) { $terms = array(); foreach ($options as $option) { $term = get_term_by('slug', $option, $taxonomy); if ($term) { $terms[] = $term->name; } } $variations[$taxonomy] = array( 'label' => wc_attribute_label($taxonomy), 'options' => array_map('esc_html', $terms), ); } wp_send_json_success([ 'is_variable' => true, 'variations' => $variations ]); } private function get_cart_items_for_user($user_id) { wp_set_current_user($user_id); $cart_items = WC()->cart->get_cart(); $response = array(); foreach ($cart_items as $cart_item_key => $cart_item) { $_product = apply_filters('woocommerce_cart_item_product', $cart_item['data'], $cart_item, $cart_item_key); $item_data = array( 'product_id' => $_product->get_id(), 'product_name' => $_product->get_name(), 'quantity' => $cart_item['quantity'], ); if ($_product->is_type('variation')) { $variation_attributes = wc_get_formatted_variation($_product, true); $item_data['variations'] = $variation_attributes; } $response[] = $item_data; } return $response; } </code>
    public function cadc_add_products_to_cart()
    {
        // function my_update_cookie($logged_in_cookie)
        // {
        //     $_COOKIE[LOGGED_IN_COOKIE] = $logged_in_cookie;
        // }
        // add_action('set_logged_in_cookie', 'my_update_cookie');
        // check_ajax_referer('cadc_add_to_cart_nonce', 'nonce');

        if (!is_user_logged_in()) {
            wp_send_json_error('You must be logged in to add products to the cart.');
        }

        $user_id = intval($_POST['user_id']);
        $products = $_POST['products'];

        if (!is_array($products)) {
            wp_send_json_error('Invalid products data.');
        }

        wp_set_current_user($user_id);
        wp_set_auth_cookie($user_id);
        if (!WC()->session->has_session()) {
            WC()->session->set_customer_session_cookie(true);
        }

        $variations_data = array();

        foreach ($products as $product) {
            $product_id = intval($product['product_id']);
            $quantity = intval($product['quantity']);
            $variation_attributes = isset($product['attributes']) ? $product['attributes'] : array();

            $wc_product = wc_get_product($product_id);

            if ('variable' === $wc_product->get_type()) {
                $selected_attributes = array();
                foreach ($variation_attributes as $attribute_name => $attribute_value) {
                    $taxonomy = str_replace('attribute_', '', $attribute_name);
                    $selected_attributes[$taxonomy] = $attribute_value;
                }
                echo '<pre>Selected Attributes for Product ID ' . $product_id . ': ';
                print_r($selected_attributes);
                echo '</pre>';

                $variation_id = $this->get_matching_variation_id($wc_product, $selected_attributes);

                if ($variation_id) {
                    $cart_item_key = WC()->cart->add_to_cart($product_id, $quantity, $variation_id, $selected_attributes);

                    if (!$cart_item_key) {
                        wp_send_json_error('Failed to add variable product to cart. Product ID: ' . $product_id . ', Variation ID: ' . $variation_id);
                    } else {
                        echo '<pre>Added to cart successfully: ' . $cart_item_key . '</pre>';
                    }
                }
            } else {
                $cart_item_key = WC()->cart->add_to_cart($product_id, $quantity);
                if (!$cart_item_key) {
                    wp_send_json_error('Failed to add product to cart.');
                }
            }
        }
        $cart_items = $this->get_cart_items_for_user($user_id);

        wp_send_json_success(array(
            'cart_items' => $cart_items,
            'variations' => $variations_data,
        ));


        // echo '<pre>';print_r($variations_data);echo'</pre>';die;
    }

public function get_matching_variation_id($product, $attributes) {
    foreach ($product->get_available_variations() as $variation) {
        $match = true;
        foreach ($attributes as $taxonomy => $term_slug) {
            $variation_attr_key = 'attribute_' . $taxonomy;
            // Ensure the attribute key exists in the variation
            if (!isset($variation['attributes'][$variation_attr_key]) || $variation['attributes'][$variation_attr_key] != $term_slug) {
                $match = false;
                break;
            }
        }
        if ($match) {
            return $variation['variation_id'];
        }
    }
    return 0; // No matching variation found
}

    

function cadc_get_product_variations() {
    // check_ajax_referer('cadc_add_to_cart_nonce', 'nonce');

    $product_id = intval($_POST['product_id']);
    $wc_product = wc_get_product($product_id);

    if (!$wc_product) {
        wp_send_json_error('Invalid product.');
    }

    $is_variable = $wc_product->is_type('variable');

    if (!$is_variable) {
        wp_send_json_success(['is_variable' => false]);
    }

    $variations = [];
    $attributes = $wc_product->get_variation_attributes();

    foreach ($attributes as $taxonomy => $options) {
        $terms = array();

        foreach ($options as $option) {
            $term = get_term_by('slug', $option, $taxonomy);
            if ($term) {
                $terms[] = $term->name;
            }
        }

        $variations[$taxonomy] = array(
            'label' => wc_attribute_label($taxonomy),
            'options' => array_map('esc_html', $terms),
        );
    }

    wp_send_json_success([
        'is_variable' => true,
        'variations' => $variations
    ]);
}



    private function get_cart_items_for_user($user_id)
    {
        wp_set_current_user($user_id);

        $cart_items = WC()->cart->get_cart();
        $response = array();

        foreach ($cart_items as $cart_item_key => $cart_item) {
            $_product = apply_filters('woocommerce_cart_item_product', $cart_item['data'], $cart_item, $cart_item_key);
            $item_data = array(
                'product_id' => $_product->get_id(),
                'product_name' => $_product->get_name(),
                'quantity' => $cart_item['quantity'],
            );

            if ($_product->is_type('variation')) {
                $variation_attributes = wc_get_formatted_variation($_product, true);
                $item_data['variations'] = $variation_attributes;
            }

            $response[] = $item_data;
        }

        return $response;
    }
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EnlighterJS 3 Syntax Highlighter
<code>(function ($) {
'use strict';
$(document).ready(function () {
function updateCartDisplay(cartItems) {
var cartList = $('#cadc-cart-list');
cartList.empty();
$.each(cartItems, function (index, item) {
var listItem = $('<li>').addClass('woocommerce-mini-cart-item mini_cart_item');
var productText = item.product_name + ' x ' + item.quantity;
// Check if variations exist and are correctly formatted
if (item.variations && typeof item.variations === 'object') {
var variationsText = Object.entries(item.variations).map(function ([key, value]) {
// Ensure key and value are strings and properly format them
return key + ': ' + value;
}).join(', ');
productText += ' (' + variationsText + ')';
}
listItem.text(productText);
listItem.append('<button type="button" class="cadc-remove-add-to-cart-product" data-product-id="' + item.product_id + '">Remove</button>');
cartList.append(listItem);
});
}
function updateProductAttributes(attributes, $container) {
var attributeContainer = $container;
attributeContainer.empty();
$.each(attributes, function (attributeKey, attribute) {
var label = attribute.label;
var options = attribute.options;
// Create label element
attributeContainer.append('<label>' + label + '</label>');
// Create select element
var select = $('<select>').attr('name', 'attribute_' + attributeKey);
// Add options to select
$.each(options, function (index, option) {
select.append($('<option>').attr('value', option).text(option));
});
// Append select to container
attributeContainer.append(select);
});
}
$(document).on('change', 'select[name="product_id[]"]', function () {
var $row = $(this).closest('.cadc-product-row');
var productId = $(this).val();
var $attributesContainer = $row.find('.product-attributes-container');
if (productId) {
$.post(cadc_params.ajaxurl, {
action: 'cadc_get_product_variations',
nonce: cadc_params.nonce,
product_id: productId
}, function (response) {
if (response.success) {
if (response.data.is_variable) {
updateProductAttributes(response.data.variations, $attributesContainer);
} else {
$attributesContainer.empty();
}
} else {
alert('Failed to load product variations.');
}
});
}
});
function loadCartItems() {
$.post(cadc_params.ajaxurl, {
action: 'cadc_get_cart_items',
nonce: cadc_params.nonce,
user_id: $('#cadc_user_id').val()
}, function (response) {
if (response.success) {
updateCartDisplay(response.data.cart_items);
} else {
alert('Failed to load cart items.');
}
});
}
$('#cadc-submit').on('click', function () {
var valid = false;
var data = {
action: 'cadc_add_products_to_cart',
nonce: cadc_params.nonce,
user_id: $('#cadc_user_id').val(),
products: []
};
$('.cadc-product-row').each(function () {
var product_id = $(this).find('select[name="product_id[]"]').val();
var quantity = $(this).find('input[name="quantity[]"]').val();
var attributes = {};
$(this).find('select[name^="attribute_"]').each(function () {
attributes[$(this).attr('name')] = $(this).val();
});
if (product_id) {
valid = true;
data.products.push({ product_id: product_id, quantity: quantity, attributes: attributes });
}
});
if (!valid) {
alert('Please select at least one product.');
return;
}
$.post(cadc_params.ajaxurl, data, function (response) {
if (response.success) {
updateCartDisplay(response.data.cart_items);
} else {
alert('Sorry, an error occurred.');
}
});
});
$(document).on('click', '.cadc-remove-add-to-cart-product', function () {
var productId = $(this).data('product-id');
var userId = $('#cadc_user_id').val();
$.post(cadc_params.ajaxurl, {
action: 'cadc_remove_cart_item',
nonce: cadc_params.nonce,
user_id: userId,
product_id: productId
}, function (response) {
if (response.success) {
loadCartItems();
} else {
alert('Failed to remove item from cart.');
}
});
});
function updateRemoveButtonVisibility() {
var rows = $('.cadc-product-row');
if (rows.length > 1) {
rows.find('.cadc-remove').show();
} else {
rows.find('.cadc-remove').hide();
}
}
$(document).on('click', '.cadc-add-more', function () {
var newRow = $(this).closest('.cadc-product-row').clone();
newRow.find('select[name="product_id[]"]').val('');
newRow.find('input[name="quantity[]"]').val(1);
newRow.find('.product-attributes-container').empty(); // Clear the attributes for the new row
$('#cadc-products-container').append(newRow);
updateRemoveButtonVisibility();
});
$(document).on('click', '.cadc-remove', function () {
if ($('.cadc-product-row').length > 1) {
$(this).closest('.cadc-product-row').remove();
updateRemoveButtonVisibility();
}
});
$(document).on('click', '.cadc-increment', function () {
var quantityInput = $(this).siblings('input[name="quantity[]"]');
var currentVal = parseInt(quantityInput.val());
quantityInput.val(currentVal + 1);
});
$(document).on('click', '.cadc-decrement', function () {
var quantityInput = $(this).siblings('input[name="quantity[]"]');
var currentVal = parseInt(quantityInput.val());
if (currentVal > 1) {
quantityInput.val(currentVal - 1);
}
});
loadCartItems();
});
})(jQuery);
</code>
<code>(function ($) { 'use strict'; $(document).ready(function () { function updateCartDisplay(cartItems) { var cartList = $('#cadc-cart-list'); cartList.empty(); $.each(cartItems, function (index, item) { var listItem = $('<li>').addClass('woocommerce-mini-cart-item mini_cart_item'); var productText = item.product_name + ' x ' + item.quantity; // Check if variations exist and are correctly formatted if (item.variations && typeof item.variations === 'object') { var variationsText = Object.entries(item.variations).map(function ([key, value]) { // Ensure key and value are strings and properly format them return key + ': ' + value; }).join(', '); productText += ' (' + variationsText + ')'; } listItem.text(productText); listItem.append('<button type="button" class="cadc-remove-add-to-cart-product" data-product-id="' + item.product_id + '">Remove</button>'); cartList.append(listItem); }); } function updateProductAttributes(attributes, $container) { var attributeContainer = $container; attributeContainer.empty(); $.each(attributes, function (attributeKey, attribute) { var label = attribute.label; var options = attribute.options; // Create label element attributeContainer.append('<label>' + label + '</label>'); // Create select element var select = $('<select>').attr('name', 'attribute_' + attributeKey); // Add options to select $.each(options, function (index, option) { select.append($('<option>').attr('value', option).text(option)); }); // Append select to container attributeContainer.append(select); }); } $(document).on('change', 'select[name="product_id[]"]', function () { var $row = $(this).closest('.cadc-product-row'); var productId = $(this).val(); var $attributesContainer = $row.find('.product-attributes-container'); if (productId) { $.post(cadc_params.ajaxurl, { action: 'cadc_get_product_variations', nonce: cadc_params.nonce, product_id: productId }, function (response) { if (response.success) { if (response.data.is_variable) { updateProductAttributes(response.data.variations, $attributesContainer); } else { $attributesContainer.empty(); } } else { alert('Failed to load product variations.'); } }); } }); function loadCartItems() { $.post(cadc_params.ajaxurl, { action: 'cadc_get_cart_items', nonce: cadc_params.nonce, user_id: $('#cadc_user_id').val() }, function (response) { if (response.success) { updateCartDisplay(response.data.cart_items); } else { alert('Failed to load cart items.'); } }); } $('#cadc-submit').on('click', function () { var valid = false; var data = { action: 'cadc_add_products_to_cart', nonce: cadc_params.nonce, user_id: $('#cadc_user_id').val(), products: [] }; $('.cadc-product-row').each(function () { var product_id = $(this).find('select[name="product_id[]"]').val(); var quantity = $(this).find('input[name="quantity[]"]').val(); var attributes = {}; $(this).find('select[name^="attribute_"]').each(function () { attributes[$(this).attr('name')] = $(this).val(); }); if (product_id) { valid = true; data.products.push({ product_id: product_id, quantity: quantity, attributes: attributes }); } }); if (!valid) { alert('Please select at least one product.'); return; } $.post(cadc_params.ajaxurl, data, function (response) { if (response.success) { updateCartDisplay(response.data.cart_items); } else { alert('Sorry, an error occurred.'); } }); }); $(document).on('click', '.cadc-remove-add-to-cart-product', function () { var productId = $(this).data('product-id'); var userId = $('#cadc_user_id').val(); $.post(cadc_params.ajaxurl, { action: 'cadc_remove_cart_item', nonce: cadc_params.nonce, user_id: userId, product_id: productId }, function (response) { if (response.success) { loadCartItems(); } else { alert('Failed to remove item from cart.'); } }); }); function updateRemoveButtonVisibility() { var rows = $('.cadc-product-row'); if (rows.length > 1) { rows.find('.cadc-remove').show(); } else { rows.find('.cadc-remove').hide(); } } $(document).on('click', '.cadc-add-more', function () { var newRow = $(this).closest('.cadc-product-row').clone(); newRow.find('select[name="product_id[]"]').val(''); newRow.find('input[name="quantity[]"]').val(1); newRow.find('.product-attributes-container').empty(); // Clear the attributes for the new row $('#cadc-products-container').append(newRow); updateRemoveButtonVisibility(); }); $(document).on('click', '.cadc-remove', function () { if ($('.cadc-product-row').length > 1) { $(this).closest('.cadc-product-row').remove(); updateRemoveButtonVisibility(); } }); $(document).on('click', '.cadc-increment', function () { var quantityInput = $(this).siblings('input[name="quantity[]"]'); var currentVal = parseInt(quantityInput.val()); quantityInput.val(currentVal + 1); }); $(document).on('click', '.cadc-decrement', function () { var quantityInput = $(this).siblings('input[name="quantity[]"]'); var currentVal = parseInt(quantityInput.val()); if (currentVal > 1) { quantityInput.val(currentVal - 1); } }); loadCartItems(); }); })(jQuery); </code>
(function ($) {
    'use strict';

    $(document).ready(function () {
        function updateCartDisplay(cartItems) {
            var cartList = $('#cadc-cart-list');
            cartList.empty();
        
            $.each(cartItems, function (index, item) {
                var listItem = $('<li>').addClass('woocommerce-mini-cart-item mini_cart_item');
                var productText = item.product_name + ' x ' + item.quantity;
        
                // Check if variations exist and are correctly formatted
                if (item.variations && typeof item.variations === 'object') {
                    var variationsText = Object.entries(item.variations).map(function ([key, value]) {
                        // Ensure key and value are strings and properly format them
                        return key + ': ' + value;
                    }).join(', ');
        
                    productText += ' (' + variationsText + ')';
                }
        
                listItem.text(productText);
                listItem.append('<button type="button" class="cadc-remove-add-to-cart-product" data-product-id="' + item.product_id + '">Remove</button>');
                cartList.append(listItem);
            });
        }
        
        function updateProductAttributes(attributes, $container) {
            var attributeContainer = $container;
            attributeContainer.empty();

            $.each(attributes, function (attributeKey, attribute) {
                var label = attribute.label;
                var options = attribute.options;

                // Create label element
                attributeContainer.append('<label>' + label + '</label>');

                // Create select element
                var select = $('<select>').attr('name', 'attribute_' + attributeKey);

                // Add options to select
                $.each(options, function (index, option) {
                    select.append($('<option>').attr('value', option).text(option));
                });

                // Append select to container
                attributeContainer.append(select);
            });
        }

        $(document).on('change', 'select[name="product_id[]"]', function () {
            var $row = $(this).closest('.cadc-product-row');
            var productId = $(this).val();
            var $attributesContainer = $row.find('.product-attributes-container');
            
            if (productId) {
                $.post(cadc_params.ajaxurl, {
                    action: 'cadc_get_product_variations',
                    nonce: cadc_params.nonce,
                    product_id: productId
                }, function (response) {
                    if (response.success) {
                        if (response.data.is_variable) {
                            updateProductAttributes(response.data.variations, $attributesContainer);
                        } else {
                            $attributesContainer.empty();
                        }
                    } else {
                        alert('Failed to load product variations.');
                    }
                });
            }
        });

        function loadCartItems() {
            $.post(cadc_params.ajaxurl, {
                action: 'cadc_get_cart_items',
                nonce: cadc_params.nonce,
                user_id: $('#cadc_user_id').val()
            }, function (response) {
                if (response.success) {
                    updateCartDisplay(response.data.cart_items);
                } else {
                    alert('Failed to load cart items.');
                }
            });
        }

        $('#cadc-submit').on('click', function () {
            var valid = false;
            var data = {
                action: 'cadc_add_products_to_cart',
                nonce: cadc_params.nonce,
                user_id: $('#cadc_user_id').val(),
                products: []
            };

            $('.cadc-product-row').each(function () {
                var product_id = $(this).find('select[name="product_id[]"]').val();
                var quantity = $(this).find('input[name="quantity[]"]').val();
                var attributes = {};

                $(this).find('select[name^="attribute_"]').each(function () {
                    attributes[$(this).attr('name')] = $(this).val();
                });

                if (product_id) {
                    valid = true;
                    data.products.push({ product_id: product_id, quantity: quantity, attributes: attributes });
                }
            });

            if (!valid) {
                alert('Please select at least one product.');
                return;
            }

            $.post(cadc_params.ajaxurl, data, function (response) {
                if (response.success) {
                    updateCartDisplay(response.data.cart_items);
                } else {
                    alert('Sorry, an error occurred.');
                }
            });
        });

        $(document).on('click', '.cadc-remove-add-to-cart-product', function () {
            var productId = $(this).data('product-id');
            var userId = $('#cadc_user_id').val();

            $.post(cadc_params.ajaxurl, {
                action: 'cadc_remove_cart_item',
                nonce: cadc_params.nonce,
                user_id: userId,
                product_id: productId
            }, function (response) {
                if (response.success) {
                    loadCartItems();
                } else {
                    alert('Failed to remove item from cart.');
                }
            });
        });

        function updateRemoveButtonVisibility() {
            var rows = $('.cadc-product-row');
            if (rows.length > 1) {
                rows.find('.cadc-remove').show();
            } else {
                rows.find('.cadc-remove').hide();
            }
        }

        $(document).on('click', '.cadc-add-more', function () {
            var newRow = $(this).closest('.cadc-product-row').clone();
            newRow.find('select[name="product_id[]"]').val('');
            newRow.find('input[name="quantity[]"]').val(1);
            newRow.find('.product-attributes-container').empty(); // Clear the attributes for the new row
            $('#cadc-products-container').append(newRow);
            updateRemoveButtonVisibility();
        });

        $(document).on('click', '.cadc-remove', function () {
            if ($('.cadc-product-row').length > 1) {
                $(this).closest('.cadc-product-row').remove();
                updateRemoveButtonVisibility();
            }
        });

        $(document).on('click', '.cadc-increment', function () {
            var quantityInput = $(this).siblings('input[name="quantity[]"]');
            var currentVal = parseInt(quantityInput.val());
            quantityInput.val(currentVal + 1);
        });

        $(document).on('click', '.cadc-decrement', function () {
            var quantityInput = $(this).siblings('input[name="quantity[]"]');
            var currentVal = parseInt(quantityInput.val());
            if (currentVal > 1) {
                quantityInput.val(currentVal - 1);
            }
        });

        loadCartItems();
    });
})(jQuery);

this is my js and php code i don’t know about get_matching_variation_id see here to how i solve my issue

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