Jekyll - Get all folders in a directory and generate pages - jekyll

Question

I have a folder structure like so:
/gallery/images/category1/
/gallery/images/category2/
/gallery/images/category3/
/gallery/images/category4/
/gallery/images/category5/
and so on..
Inside each of these folders, there are a bunch of images. However, these category folders are always changing, the names as well.
My goal is to have jekyll auto generate a seperate page for each on of these categories. Then in this page, cycle through each image in that folder and display it on the page.
What I need help on:
How do I look in the /gallery/images folder and grab all the folders
Once I know all the folders, how do you generate a page such as /gallery/[FOLDER_NAME].html for each one of them
Once I am able to do that, I know I can have the follow as the content of the page and be fine.
{% for image in site.static_files %}
{% if image.path contains 'gallery/{{ FOLDER_NAME }}' %}
<img src="{{ site.baseurl }}{{ image.path }}" />
{% endif %}
{% endfor %}
Any help or guidance would be greatly appreciated.

Answer 1

You can do this with javascript and without an extension.
Step 1. Put them on the screen using a page or layout.
<div id="cats"></div>
<div class="imagecontainer">
{% for image in site.static_files %}
{% if image.path contains 'gallery/' %}
{% assign imagepath = image.path | split: "/" %}
<img src="{{ site.baseurl }}{{ image.path }}" class="
{% for subpath in imagepath %}
{% if forloop.index0 == 3 %}{{ subpath }}{% endif %}
{% endfor %}
" />
{% endif %}
{% endfor %}
</div>
Step 2. Have javascript show/hide them one by one.
/* hide all images */
$('.imagecontainer img').hide();
/* define an array for the categories */
var cats = new Array();
/* fill the array with the categories */
$('.imagecontainer img').each(function() {
cats[$(this).attr('class')] = 1;
});
/* create a link for each category */
$.each(cats, function(cat, value) {
$('#cats').append(''+cat+'');
});
/* make the links toggle the right images */
$('.showcat').click(function() {
/* hide all images */
$('.imagecontainer img').hide();
/* show images in the clicked category */
$('.imagecontainer img.'+$(this).attr('cat')).show();
});
/* make images rotate */
$('.imagecontainer img').click(function() {
/* append the clicked image to its container */
$('.imagecontainer').append($(this));
});
Use this CSS:
div#cats {}
div.imagecontainer {}
img {position: absolute}
You can prevent them from loading in the first place by using data-src instead of src for the images and swap these attributes using javascript/jQuery.
Documentation on Liquid split: https://shopify.github.io/liquid/filters/split/