Auto complete learndash topics and lessons

ld-auto-mark-complete.php

//thanks to https://gist.github.com/sultann/24baa5483b4632c3cf214a8de5648204#file-ld-auto-mark-complete-php-L17 for most of 
//this code, i just corrected it to work with ld_lesson_tag to grab the tags as the original version returned empty 
//array since it was looking for standard wp tags 

function ld_is_tagged($postId) {
    //get all learndash tags on post
    $tags = wp_get_post_terms($postId,'ld_lesson_tag');

    foreach ($tags as $tag) {
        //need to check for auto-mark-complete tag exists on this post
        if ($tag->name === 'auto-mark-complete') {
            return true;
        }
    }
    return false;
}

function ld_auto_mark_complete() {
    global $post;
    
    //lets make sure there is a post object first to not have error
    if(!is_object($post)){
    	return;
    }


    //lets make sure this is a learndash lesson or a topic first  (if you want other types add them)
    $types_of_posts_to_complete = array('sfwd-lessons','sfwd-topic');
    if (!in_array(get_post_type(),$types_of_posts_to_complete) || !is_singular() ){
    	return;
	}

    $postId = $post->ID;
    //check if it has the tag to auto complete
    if (!ld_is_tagged($postId)) {
        return;
    }
    //if we got this far all checks passed and we can not auto complete the post
    learndash_process_mark_complete(get_current_user_id(), $postId);
}


add_action('template_redirect', 'ld_auto_mark_complete');