Is single post (of post type) condition

snippet.php

add_action('init', 'lit_register_condition_single_post_type');
function lit_register_condition_single_post_type() {
	
	global $oxy_condition_operators;

	$postTypes = get_post_types();

	oxygen_vsb_register_condition('Single Post Type', array('options'=> array_keys($postTypes)), $oxy_condition_operators['simple'], 'lit_condition_single_post_type_callback', 'Post');	
}



function lit_condition_single_post_type_callback($value, $operator) {

	if($operator == '==') {
		return ( is_singular($value) ) ? true : false;	
	}
	else {
		return ( !is_singular($value) ) ? true : false;	
	}

}

Hi and thanks for that snippet.

However, I would put it inside :

if( function_exists('oxygen_vsb_register_condition') ) {
    // snippet.php
}