add_action( 'wp_footer', 'change_qty_script' );

​

function change_qty_script() {

    ?>

    <script>

    jQuery(document).ready(function ($) {

    $('#remove_one_item').click(function () {

​

        var current_qty = parseInt($(this).attr('data-in-cart-qty'));

        var id = $(this).attr('data-product-id');

        var cat_item_key = $(this).attr('data-cart-item-key');

        var data = {

            product_id: id,

            quantity: current_qty - 1,

            cat_item_key : cat_item_key

        };

        var url = wc_add_to_cart_params.wc_ajax_url.toString().replace('%%endpoint%%', 'update_qty');

        $.post(url, data, function (response) {

            if (!response) {

                return;

            }

            if (response) {

                location.reload();

            }

        });

    });

    $('#add_to_cart').click(function () {

​

        var id = $(this).attr('data-product-id');

        var cat_item_key = $(this).attr('data-cart-item-key');

        var data = {

            product_id: id,

            quantity: 1,

        };

        var url = wc_add_to_cart_params.wc_ajax_url.toString().replace('%%endpoint%%', 'add_to_cart');

        $.post(url, data, function (response) {

            if (!response) {

                return;

            }

            if (response) {

                location.reload();

            }

        });

    });

​

    });

    </script>

    <?php

​

}

/*

 * Add promo literature to cart under certain conditions;

 * initially, add LFS booklet to physical orders not already containg the LFS book itself

 */

function add_promo_lit_to_cart() {

    global $woocommerce;

    $promo_id = 6619;  // Product Id of the free product which will get added to cart

    $book_id = 6123;

    $include = false;

​

    if ( sizeof( WC()->cart->get_cart() ) > 0 ) {

        // check at least one Central Books item is on the order

        foreach ( WC()->cart->get_cart() as $cart_item_key => $values ) {

            $_product = $values['data'];

            if( has_term( 'Central', 'product_cat', $_product->get_id() ) )  {

                $include = true;

                break;

            }                       

        }

        // remove promo if its book is on the order

        foreach ( WC()->cart->get_cart() as $cart_item_key => $values ) {

            $_product = $values['data'];

            if ( $_product->get_id() == $book_id) {

                $include = false;

                break;

            }                       

        }

        if ( $include == true ) {

            WC()->cart->add_to_cart( $promo_id );

        }

    }

    // reset qty to 1 as this function seems to get called twice each time by the hook

    if ( sizeof( WC()->cart->get_cart() ) > 0 ) {

        foreach ($items as $cart_item_key => $item) {

            if (($item['product_id']) == 6619) { 

                WC()->cart->set_quantity( $cart_item_key, 1 );

                break;

            }

        }

    }

}

​

add_action( 'woocommerce_cart_totals_after_order_total', 'add_promo_lit_to_cart' );

​

/*

 * Ensure the promo leaflet does not show on the cart page,

 * by removing it if the user goes back there after visiting the checkout

 */

function remove_promo_from_cart() {

    $basket_page = 65;

    if ( is_page($basket_page) ) {

        $promo_id = 6619;

        $found = false;

        //check if product already in cart

        if ( sizeof( WC()->cart->get_cart() ) > 0 ) {

            foreach ( WC()->cart->get_cart() as $cart_item_key => $values ) {

                $_product = $values['data'];

                if ( $_product->get_id() == $promo_id ) {

                    WC()->cart->remove_cart_item($cart_item_key);

                    break;

                }

            }

        }

    }

}

​

add_action( 'template_redirect', 'remove_promo_from_cart' );

add_action( 'woocommerce_after_add_to_cart_button', 'remove_product' );

​

function remove_product() {

    global $product;

​

    $cart_item_key        = WC()->cart->generate_cart_id( $product->get_ID() );

    $in_cart              = WC()->cart->find_product_in_cart( $cart_item_key );

    $cart_item_remove_url = wc_get_cart_remove_url( $cart_item_key );

​

?>

​

<div class="col s4">

<a class="addtocart_link"

id ="add_to_cart" 

title="add_to_cart" 

data-product-id="<?php echo $product->get_ID(); ?>"

data-cart-item-key="<?php echo $cart_item_key; ?>">

<span class="action_box fa fa-plus"></span></a>

            </div>

<?php

    if ( $in_cart ) {

        $quantities = WC()->cart->get_cart_item_quantities();

        foreach ( $quantities as $key => $quantity ) {

            if ( $product->get_ID() == $key ) {

                if ( $quantity > 1 ) {

                    ?>

                    <div class="col s4">

                    <a id="remove_one_item" class="remove_from_cart" href="#" 

                    data-product-id="<?php echo $product->get_ID(); ?>"

                    data-in-cart-qty="<?php echo  $quantity; ?>"

                    data-cart-item-key="<?php echo $cart_item_key; ?>"

                    title="remove_from_cart ">

                        <span class=" action_box fa fa-minus "></span></a>

                    </div>

                    <?php

                    return;

                }

            }

        }

        ?>

        <div class="col s4">

        <a class="remove_from_cart" href="<?php echo esc_url( $cart_item_remove_url ); ?>" title="remove_from_cart ">

        <span class=" action_box fa fa-minus "></span></a>

​

        <?php

    }

​

}

add_action( 'wc_ajax_update_qty', 'update_qty' );

​

function update_qty() {

    ob_start();

    $product_id   = absint( $_POST['product_id'] );

    $product      = wc_get_product( $product_id );

    $quantity     = $_POST['quantity'];

    $cat_item_key = $_POST['cat_item_key'];

​

    WC()->cart->set_quantity( $cat_item_key, $quantity, true );

​

    wp_send_json( 'done' );

}

<?php

$cart_item_key = WC()->cart->generate_cart_id( $product->get_ID() );

$in_cart       = WC()->cart->find_product_in_cart( $cart_item_key );

if ( $in_cart ) {

    $cart_item_remove_url = wc_get_cart_remove_url( $cart_item_key );

    ?>

    <div class="col s4">

        <a class="remove_from_cart" href="<?php echo esc_url( $cart_item_remove_url ); ?>" title="remove_from_cart ">

            <span class=" action_box fa fa-minus "></span></a>

            </div>

    <?php

​

}