A simple recursive function for flattening a tree of forum posts saved in MongoDB, preserving the correct order in which to display them (left order traversal). Used in notmoodle.com (app.js and thread.ejs).

postPriority.js

var getPostPriority = async function(nodeRef, priority){
	var node = await Post.findById(nodeRef)
	priority.push(node);
	for(var i = 0; i < node.children.length; i++)
		await getPostPriority(node.children[i], priority);
	return priority;	
}