add additional days prior installation field to bundle

backend/app/plugins/wiaas/includes/admin/package/class-wiaas-admin-package-delivery-options.php

@@ -0,0 +1,44 @@
+<?php
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit; // Exit if accessed directly
+}
+
+/**
+ * Class Wiaas_Admin_Package_Delivery_Options
+ */
+class Wiaas_Admin_Package_Delivery_Options {
+
+	public static function init() {
+
+		add_action( 'woocommerce_product_options_general_product_data', array( __CLASS__, 'package_delivery_data' ) );
+
+		add_action( 'woocommerce_process_product_meta', array( __CLASS__, 'process_meta_box' ));
+	}
+
+	/**
+	 * Renders wiaas package delivery options
+	 */
+	public static function package_delivery_data() {
+
+		global $post;
+
+		$additional_days = Wiaas_Package::get_earliest_installation_additional_days( $post->ID );
+
+		include 'views/html-package-delivery-options.php';
+	}
+
+	/**
+	 * Saves posted wiaas package type data
+	 * @param $package_id
+	 */
+	public static function process_meta_box($package_id) {
+
+		file_put_contents('/home/bilal/wiaas.log', print_r($_POST['wiaas_additional_days'], true));
+		if (isset($_POST['wiaas_additional_days'])){
+			Wiaas_Package::save_earliest_installation_additional_days($package_id, $_POST['wiaas_additional_days']);
+		}
+	}
+}
+
+Wiaas_Admin_Package_Delivery_Options::init();

backend/app/plugins/wiaas/includes/admin/package/views/html-package-delivery-options.php

@@ -0,0 +1,16 @@
+<?php
+/**
+ * Wiaas Package options related to delivery
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+?>
+
+<div id="wiaas_package_type_editor" class="options_group show_if_bundle hidden">
+	<p class="form-field">
+		<label for="wiaas_additional_days"><?php esc_html_e( 'Number of additional days for the earliest installation date:', 'wiaas' ); ?></label>
+		<input type="number" id="wiaas_additional_days" name="wiaas_additional_days" min="0" value=<?php echo $additional_days ?> />
+	</p>
+</div>