related-products-by-tag.liquid

{% comment %}
	Check if this product has any 'related' tags.
	If so then create an array of those tags.
{% endcomment %}

{% assign related_product_tags = '' %}

{% if product.tags.size > 0 %}
	{% for tag in product.tags %}
		{% if tag contains 'related' %}
			{% assign related_product_tags = related_product_tags | append: tag | append: ',' %}
		{% endif %}
	{% endfor %}
{% endif %}

{% assign related_product_tags = related_product_tags | split: ',' %}

{% comment %}
	Loop through all products and check if they have the same related tags.
	If so then add them to an array of related products.
{% endcomment %}

{% assign related_products = '' %}

{% assign found_related_product = false %}

{% paginate collections.all.products by 1000 %}

	{% for terez_product in collections.all.products %}
		{% unless terez_product.handle == product.handle %}
			{% for tag in terez_product.tags %}
				{% if related_product_tags contains tag %}
					{% unless related_products contains terez_product.handle %}
						{% assign found_related_product = true %}
						{% assign related_products = related_products | append: terez_product.handle | append: ',' %}
					{% endunless %}
				{% endif %}
			{% endfor %}
		{% endunless %}
	{% endfor %}

{% endpaginate %}

{% assign related_products = related_products | split: ',' %}

{% if found_related_product %}
	<h2>Found a related product.</h2>
	<ul class="related_products_list">
		{% for related_product in related_products %}
			<li><a href="{{ all_products[related_product].url }}">{{ all_products[related_product].title }}</a></li>
		{% endfor %}
	</ul>
{% endif %}