Added class field to addon group

admin/class-product-addon-admin.php

@@ -227,6 +227,7 @@ class Product_Addon_Admin {
 			 $addon_type 			= $_POST['product_addon_type'];
 			 $addon_position 		= $_POST['product_addon_position'];
 			 $addon_required		= isset( $_POST['product_addon_required'] ) ? $_POST['product_addon_required'] : array();
+			 $addon_class			= $_POST['product_addon_class'];
 
 			 $addon_option_label	= $_POST['product_addon_option_label'];
 			 $addon_option_price	= $_POST['product_addon_option_price'];
@@ -269,6 +270,7 @@ class Product_Addon_Admin {
 			 		'position'		=> absint( $addon_position[ $i ] ),
 			 		'options' 		=> $addon_options,
 			 		'required'		=> isset( $addon_required[ $i ] ) ? 1 : 0,
+			 		'class' 		=> sanitize_text_field( stripslashes( $addon_class[ $i ] ) ),
 			 	);
 			}
 		}

admin/html-addon.php

@@ -36,6 +36,12 @@ if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly
 					<textarea cols="20" id="addon_description_<?php echo $loop; ?>" rows="3" name="product_addon_description[<?php echo $loop; ?>]"><?php echo esc_textarea( $addon['description'] ) ?></textarea>
 				</td>
 			</tr>
+			<tr>
+				<td class="addon_class" width="50%">
+					<label for="addon_class_<?php echo $loop; ?>"><?php _e( 'Group Class', 'woocommerce-product-addons' ); ?></label>
+					<input type="text" id="addon_class_<?php echo $loop; ?>" name="product_addon_class[<?php echo $loop; ?>]" value="<?php echo esc_attr( $addon['class'] ) ?>" />
+				</td>
+			</tr>
 			<tr>
 				<td class="data" colspan="3">
 					<table cellspacing="0" cellpadding="0">

classes/class-product-addon-display.php

@@ -145,6 +145,7 @@ class Product_Addon_Display {
 						'name'        => $addon['name'],
 						'description' => $addon['description'],
 						'type'        => $addon['type'],
+						'class'       => $addon['class'],
 					), 'woocommerce-product-addons', $this->plugin_path() . '/templates/' );
 
 				echo $this->get_addon_html( $addon );

templates/addons/addon-start.php

-<div class="<?php if ( 1 == $required ) echo 'required-product-addon'; ?> product-addon product-addon-<?php echo sanitize_title( $name ); ?>">
+<?php
+$classes = array();
+
+if ( 1 == $required ) {
+  $classes[] = 'required-product-addon';
+}
+
+$classes[] = 'product-addon product-addon-' . sanitize_title( $name );
+$classes[] = $class;
+?>
+<div class="<?php echo implode(' ', $classes); ?>">
 
 	<?php do_action( 'wc_product_addon_start', $addon ); ?>