{%- assign npm_cdn_key = ":npm_cdn/" -%}
{%- assign npm_cdn = site.npm_cdn | default: "https://cdn.jsdelivr.net/npm/"-%}
{%- assign last_char = npm_cdn | split: "" | last -%}
{%- if last_char != "/" -%}{%- assign npc_cdn = npm_cdn | append: "/" -%}{%- endif -%}

{%- assign github_cdn_key = ":github_cdn/" -%}
{%- assign github_cdn = site.github_cdn | default: "https://cdn.jsdelivr.net/gh/" -%}
{%- assign last_char = github_cdn | split: "" | last -%}
{%- if last_char != "/" -%}{%- assign github_cdn = github_cdn | append: "/" -%}{%- endif -%}

{%- assign js_list = "" | split: "" -%}
{%- assign mjs_list = "" | split: "" -%}
{%- assign css_list = "" | split: "" -%}

{%- assign js_list = js_list
  | push: "/assets/databook/js/databook.js"
  -%}

{%- assign mjs_list = mjs_list
  -%}

{%- assign css_list = css_list
  | push: "/assets/databook/css/databook.css"
  | push: ":npm_cdn/@fortawesome/fontawesome-free/css/all.min.css"
  -%}

{%- if page.chartjs or layout.chartjs or site.chartjs -%}
  {%- assign js_list = js_list | push: ":npm_cdn/chart.js/dist/chart.min.js" -%}
{%- endif -%}

{%- if page.flowchart or layout.flowchart or site.flowchart -%}
  {%- assign js_list = js_list | push: ":npm_cdn/raphael@2.3.0/raphael.min.js" -%}
  {%- assign js_list = js_list | push: ":npm_cdn/flowchart.js@1.8.0/release/flowchart.min.js" -%}
{%- endif -%}

{%- if page.katex or layout.katex or site.katex -%}
  {%- assign css_list = css_list | push: ":npm_cdn/katex/dist/katex.min.css" -%}
  {%- assign js_list = js_list | push: ":npm_cdn/katex/dist/katex.min.js" -%}
  {%- assign js_list = js_list | push: ":npm_cdn/katex/dist/contrib/auto-render.min.js" -%}
  {%- include custom/katex.liquid -%}
{%- endif -%}

{%- if page.mathjax or layout.mathjax or site.mathjax -%}
  {%- assign js_list = js_list | push: ":npm_cdn/mathjax/es5/tex-mml-chtml.js" -%}
  {%- include custom/mathjax.liquid -%}
{%- endif -%}

{%- if page.mermaid or layout.mermaid or site.mermaid -%}
  {%- assign js_list = js_list | push: ":npm_cdn/mermaid/dist/mermaid.min.js" -%}
{%- endif -%}

{%- if site.data.requirements.js -%}{%- assign js_list = js_list | concat: site.data.requirements.js -%}{%- endif -%}
{%- if site.data.requirements.modules -%}{%- assign mjs_list = mjs_list | concat: site.data.requirements.modules -%}{%- endif -%}
{%- if site.data.requirements.css -%}{%- assign css_list = css_list | concat: site.data.requirements.css -%}{%- endif -%}

{%- if site.requirements.js -%}{%- assign js_list = js_list | concat: site.requirements.js -%}{%- endif -%}
{%- if site.requirements.modules -%}{%- assign mjs_list = mjs_list | concat: site.requirements.modules -%}{%- endif -%}
{%- if site.requirements.css -%}{%- assign css_list = css_list | concat: site.requirements.css -%}{%- endif -%}

{%- if layout.requirements.js -%}{%- assign js_list = js_list | concat: layout.requirements.js -%}{%- endif -%}
{%- if layout.requirements.modules -%}{%- assign mjs_list = mjs_list | concat: layout.requirements.modules -%}{%- endif -%}
{%- if layout.requirements.css -%}{%- assign css_list = css_list | concat: layout.requirements.css -%}{%- endif -%}

{%- if page.requirements.js -%}{%- assign js_list = js_list | concat: page.requirements.js -%}{%- endif -%}
{%- if page.requirements.modules -%}{%- assign mjs_list = mjs_list | concat: page.requirements.modules -%}{%- endif -%}
{%- if page.requirements.css -%}{%- assign css_list = css_list | concat: page.requirements.css -%}{%- endif -%}

{%- if page.js -%}{%- assign js_list = js_list | concat: page.js -%}{%- endif -%}
{%- if page.modules -%}{%- assign mjs_list = mjs_list | concat: page.modules -%}{%- endif -%}
{%- if page.css -%}{%- assign css_list = css_list | concat: page.css -%}{%- endif -%}

{%- assign js_list = js_list | uniq -%}
{%- assign mjs_list = mjs_list | uniq -%}
{%- assign css_list = css_list | uniq -%}


{%- for url in css_list -%}
  <link href="{{- url | replace: npm_cdn_key, npm_cdn | replace: github_cdn_key, github_cdn | relative_url -}}" type="text/css" rel="stylesheet">
{%- endfor -%}

{%- for url in js_list -%}
  <script src="{{- url | replace: npm_cdn_key, npm_cdn | replace: github_cdn_key, github_cdn | relative_url -}}" type="text/javascript" defer></script>
{%- endfor -%}

{%- for url in mjs_list -%}
  <script src="{{- url | replace: npm_cdn_key, npm_cdn | replace: github_cdn_key, github_cdn | relative_url -}}" type="module" ></script>
{%- endfor -%}