Newsletter: allow defaulting to "post only" for the site about jetpack

[simison]

This snippet of code sets the default to "do not send":

function register_meta_args_filter_jetpack_dont_send_post_by_default( $args, $defaults, $object_type, $meta_key ) {
	if ( $meta_key !== '_jetpack_dont_email_post_to_subs' ) {
		return $args;
	}

	$args['default'] = 1;

	return $args;
}
add_filter( 'register_meta_args', 'register_meta_args_filter_jetpack_dont_send_post_by_default', 10, 4 );

Now when you hit publish on new posts:

If we would want to add more straightforward filter, we'd add it here:

jetpack/projects/plugins/jetpack/extensions/blocks/subscriptions/subscriptions.php

Lines 96 to 100 in f8ce5bc

	register_post_meta(
	'post',
	META_NAME_FOR_POST_DONT_EMAIL_TO_SUBS,
	array(
	'default' => false,