Felipe Honorato Felipe Honorato - 2 months ago 18
PHP Question

Creating a custom notice on Cart page based on item custom field highest value

I have a a custom field value for each product. This custom field is inserted with the code below :

<?php
// Insert a Custom Admin Field
add_action( 'woocommerce_product_options_general_product_data', 'woo_add_custom_general_fields' );

function woo_add_custom_general_fields() {

echo '<div class="options_group">';

woocommerce_wp_text_input( array(
'id' => 'days_manufacture',
'label' => __( 'Days for Manufacture', 'woocommerce' ),
'placeholder' => '',
'description' => __( 'Insert here', 'woocommerce' ),
'type' => 'number',
'custom_attributes' => array(
'step' => 'any',
'min' => '1'
),
) );

echo '</div>';
}


// Save the field
add_action( 'woocommerce_process_product_meta', 'woo_add_custom_general_fields_save' );

function woo_add_custom_general_fields_save( $post_id ){
$woocommerce_number_field = $_POST['days_manufacture'];
if( !empty( $woocommerce_number_field ) )
update_post_meta( $post_id, 'days_manufacture', esc_attr( $woocommerce_number_field ) );
}


// Store custom field
add_action( 'woocommerce_add_cart_item_data', 'save_days_field', 10, 2 );

function save_days_field( $cart_item_data, $product_id ) {
$special_item = get_post_meta( $product_id , 'days_manufacture',true );
if(!empty($special_item)) {
$cart_item_data[ 'days_manufacture' ] = $special_item;

// below statement make sure every add to cart action as unique line item
$cart_item_data['unique_key'] = md5( microtime().rand() );
WC()->session->set( 'days_manufacture', $special_item );
}
return $cart_item_data;
}


// Render meta on cart and checkout
add_filter( 'woocommerce_get_item_data', 'rendering_meta_field_on_cart_and_checkout', 10, 2 );

function rendering_meta_field_on_cart_and_checkout( $cart_data, $cart_item ) {
$custom_items = array();
// Woo 2.4.2 updates
if( !empty( $cart_data ) ) {
$custom_items = $cart_data;
}
if( isset( $cart_item['days_manufacture'] ) ) {
$custom_items[] = array( "name" => __( "Days", "woocommerce" ), "value" => $cart_item['days_manufacture'] );
}
return $custom_items;
} ?>


This code works perfectly.

Now I would like in Cart page to display the highest value of this custom field (days_manufacture) on a custom message, when multiple items are in Cart, like in this screenshot.

Screenshot

How can I achieve this?

Thanks.

Answer

Here is a custom function that will display a message on cart with the highest number of days of manufacture…

Here is the code:

add_action('woocommerce_before_cart', 'days_of_manufacture');
function days_of_manufacture() {
        $day_txt = ' ' . __('day', 'your_theme_domain_slug' );
        $days_txt = ' ' . __('days', 'your_theme_domain_slug' );
        $text = __('Your Order will be produced in: ', 'your_theme_domain_slug' );
        $max_days = 0;

        foreach( WC()->cart->get_cart() as $cart_item )
            if($cart_item['days_manufacture'] > $max_days)
                $max_days = $cart_item['days_manufacture'];

        if($max_days != 0) {
            if ($max_days == 1)
                $days_txt = $day_txt;

            $output = $text . $max_days . $days_txt;
            echo "<div class='woocommerce-info'>$output</div>";
        }
}

This code goes in function.php file of your active child theme (or theme) or also in any plugin file.

This code is tested and works.