---
# find all unique subjects used in the metadata 
#
# Requires CB's array_count_uniq.rb plugin!
---
{%- if site.data.theme.subjects-fields -%}
{%- assign items = site.data[site.metadata] | where_exp: 'item','item.objectid' -%}
{%- assign subjects-fields = site.data.theme.subjects-fields | split: ";" -%}
{%- assign subjects = "" -%}
{%- for c in subjects-fields -%}
{% assign new = items | map: c | join: ";" %}
{% assign subjects = subjects | append: ";" | append: new %}
{%- endfor -%}
{%- assign uniqSubjects = subjects | downcase | split: ";" | array_count_uniq -%}
subject,count,link
{% for s in uniqSubjects %}"{{ s[0] }}",{{ s[1] }},"{{ s[0] | url_param_escape | prepend: '/browse.html#' | absolute_url }}"
{% endfor %}
{%- endif -%}