breadcrumbs.liquid

{%- assign should_have_breadcrumb = false -%}
{%- assign breadcrumbs_linklist = linklists.collection-tree -%}
{%- assign breadcrumbs = '' -%}

{%- assign collection_handle = collection.handle -%}
{%- assign breadcrumb_link = nil -%}
{%- assign child_breadcrumb_link = nil -%}
{%- assign grandchild_breadcrumb_link = nil -%}

{%- for link in breadcrumbs_linklist.links -%}
  {%- if child_breadcrumb_link != nil -%}
    {% break %}
  {%- endif -%}

  {%- if link.type != 'collection_link' -%}
    {% continue %}
  {%- endif -%}

  {%- assign link_collection_handle = link.object.handle -%}

  {%- if link_collection_handle == collection_handle -%}
    {%- assign should_have_breadcrumb = true -%}
    {%- assign breadcrumb_link = link -%}

    {%- break -%}
  {%- endif -%}

  {%- if link.links.size > 0 -%}
    {%- for child_link in link.links -%}
      {%- if grandchild_breadcrumb_link != nil -%}
        {% break %}
      {%- endif -%}

      {%- if link.type != 'collection_link' -%}
        {% continue %}
      {%- endif -%}

      {%- assign link_collection_handle = child_link.object.handle -%}

      {%- if link_collection_handle == collection_handle -%}
        {%- assign should_have_breadcrumb = true -%}
        {%- assign breadcrumb_link = link -%}
        {%- assign child_breadcrumb_link = child_link -%}

        {%- break -%}
      {%- endif -%}

      {%- if child_link.links.size > 0 -%}
        {%- for grandchild_link in child_link.links -%}
          {%- if link.type != 'collection_link' -%}
            {% continue %}
          {%- endif -%}

          {%- assign link_collection_handle = grandchild_link.object.handle -%}

          {%- if link_collection_handle == collection_handle -%}
            {%- assign should_have_breadcrumb = true -%}
            {%- assign breadcrumb_link = link -%}
            {%- assign child_breadcrumb_link = child_link -%}
            {%- assign grandchild_breadcrumb_link = grandchild_link -%}

            {%- break -%}
          {%- endif -%}
        {%- endfor -%}
      {%- endif -%}
    {%- endfor -%}
  {%- endif -%}
{%- endfor -%}

{%- if should_have_breadcrumb -%}
  {%- if breadcrumb_link -%}
    {%- assign breadcrumbs = '|' | append: breadcrumb_link.title | append: ',' | append: breadcrumb_link.url -%}
  {%- endif -%}

  {%- if child_breadcrumb_link -%}
    {%- assign breadcrumbs = breadcrumbs | append: '|' | append: child_breadcrumb_link.title | append: ',' | append: child_breadcrumb_link.url -%}
  {%- endif -%}

  {%- if grandchild_breadcrumb_link -%}
    {%- assign breadcrumbs = breadcrumbs | append: '|' | append: grandchild_breadcrumb_link.title | append: ',' | append: grandchild_breadcrumb_link.url -%}
  {%- endif -%}

  {%- assign breadcrumbs = breadcrumbs | remove_first: '|' | split: '|' -%}
{%- endif -%}