woocommerce/includes/admin/woocommerce-admin-hooks.php

<?php
/**
 * WooCommerce Admin Hooks
 *
 * Action/filter hooks used for WooCommerce functions.
 *
 * @author 		WooThemes
 * @category 	Admin
 * @package 	WooCommerce/Admin
 * @version     1.6.4
 */

if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly


/**
 * Grant downloadable file access to any newly added files on any existing
 * orders for this product that have previously been granted downloadable file access
 *
 * @access public
 * @param int $product_id product identifier
 * @param int $variation_id optional product variation identifier
 * @param array $file_paths newly set file paths
 */
function woocommerce_process_product_file_download_paths( $product_id, $variation_id, $file_paths ) {
	global $wpdb;

	if ( $variation_id )
		$product_id = $variation_id;

	// determine whether any new files have been added
	$existing_file_paths = apply_filters( 'woocommerce_file_download_paths', get_post_meta( $product_id, '_file_paths', true ), $product_id, null, null );
	if ( ! $existing_file_paths ) $existing_file_paths = array();
	$new_download_ids = array_diff( array_keys( $file_paths ), array_keys( $existing_file_paths ) );

	if ( $new_download_ids ) {
		// determine whether downloadable file access has been granted (either via the typical order completion, or via the admin ajax method)
		$existing_permissions = $wpdb->get_results( $wpdb->prepare( "SELECT * from {$wpdb->prefix}woocommerce_downloadable_product_permissions WHERE product_id = %d GROUP BY order_id", $product_id ) );
		foreach ( $existing_permissions as $existing_permission ) {
			$order = new WC_Order( $existing_permission->order_id );

			if ( $order->id ) {
				foreach ( $new_download_ids as $new_download_id ) {
					// grant permission if it doesn't already exist
					if ( ! $wpdb->get_var( $wpdb->prepare( "SELECT true FROM {$wpdb->prefix}woocommerce_downloadable_product_permissions WHERE order_id = %d AND product_id = %d AND download_id = %s", $order->id, $product_id, $new_download_id ) ) ) {
						woocommerce_downloadable_file_permission( $new_download_id, $product_id, $order );
					}
				}
			}
		}
	}
}

add_action( 'woocommerce_process_product_file_download_paths', 'woocommerce_process_product_file_download_paths', 10, 3 );




/**
 * Events
 *
 * @see woocommerce_delete_post()
 * @see woocommerce_trash_post()
 * @see woocommerce_untrash_post()
 * @see woocommerce_preview_emails()
 * @see woocommerce_prevent_admin_access()
 * @see woocommerce_check_download_folder_protection()
 * @see woocommerce_ms_protect_download_rewite_rules()
 */
add_action('delete_post', 'woocommerce_delete_post');
add_action('wp_trash_post', 'woocommerce_trash_post');
add_action('untrash_post', 'woocommerce_untrash_post');
add_action('admin_init', 'woocommerce_preview_emails');
add_action('admin_init', 'woocommerce_prevent_admin_access');
add_action('woocommerce_settings_saved', 'woocommerce_check_download_folder_protection');
add_filter('mod_rewrite_rules', 'woocommerce_ms_protect_download_rewite_rules');

/**
 * File uploads
 *
 * @see woocommerce_downloads_upload_dir()
 * @see woocommerce_media_upload_downloadable_product()
 */
add_filter('upload_dir', 'woocommerce_downloads_upload_dir');
add_action('media_upload_downloadable_product', 'woocommerce_media_upload_downloadable_product');

/**
 * Shortcode buttons
 *
 * @see woocommerce_add_shortcode_button()
 * @see woocommerce_refresh_mce()
 */
add_action( 'init', 'woocommerce_add_shortcode_button' );
add_filter( 'tiny_mce_version', 'woocommerce_refresh_mce' );

/**
 * Category/term ordering
 *
 * @see woocommerce_create_term()
 * @see woocommerce_delete_term()
 */
add_action( "create_term", 'woocommerce_create_term', 5, 3 );
add_action( "delete_term", 'woocommerce_delete_term', 5 );

/**
 * Bulk editing
 *
 * @see woocommerce_bulk_admin_footer()
 * @see woocommerce_order_bulk_action()
 * @see woocommerce_order_bulk_admin_notices()
 */
add_action( 'admin_footer', 'woocommerce_bulk_admin_footer', 10 );
add_action( 'load-edit.php', 'woocommerce_order_bulk_action' );
add_action( 'admin_notices', 'woocommerce_order_bulk_admin_notices' );

/**
 * Mijireh Gateway
 */
add_action( 'add_meta_boxes', array( 'WC_Gateway_Mijireh', 'add_page_slurp_meta' ) );
add_action( 'wp_ajax_page_slurp', array( 'WC_Gateway_Mijireh', 'page_slurp' ) );