You can hook a function with the package view or download operation.
Use the following code to update package size when someone views the package,
add_action("init", 'wpdm_update_remote_pacakge_size');
function wpdm_update_remote_pacakge_size(){
if(isset($_REQUEST['_nonce'])&&wp_verify_nonce($_REQUEST['_nonce'],"__wpdm_view_count")){
$package_id = intval($_REQUEST['id']);
$old_package_size = get_post_meta($package_id, '__wpdm_package_size', true);
// get remote file size and update post meta here
die();
}
}
Or use wpdm_onstart_download hook to attach your custom function with download operation.
You can bulk update all package at once by going through all packages too.
