How create a new way to order post

[Doppy]

I need to add a new way to order posts. Now I see this:

And I need to order posts from the posts that have zero answers to posts that have more answer. I don't know I can do this. Anyone can help me with some codes or with some examples?

[pichalite]

@Doppy check the code for "Most posts" and implement it in reverse order.

[Doppy]

@pichalite thank to your suggest it works I have only topics that aren't "Pin". If I do this:

The topics show in this way:

In the image I can see that "primo creato " topic that I have PIN it's the last but I want to become the first.

I want that when I PIN a topic, this must be the first among the topics (now it is the last).

In plugin.json I put this hook:

{
"hook": "filter:category.topics.prepare", "method": "ordina_zero"
}

and in library I do this:

converter.ordina_zero = function(data, callback) {

	//Prendo quale element del sorted ha cliccato
	user.getSettings(data['uid'], function(err, settings) {
		if (settings.categoryTopicSort === 'zero') {
			data.reverse = false;
			data.set = 'cid:' + data.cid + ':tids:posts';
		}
		callback(null, data);

	});
};

My purpose is show the PIN topic at the beginning and after show the topics with their order. Can you help me?