blog/_includes/tag_list.html

{% comment %}Sort decreasingly, alphabetically by tag frequency and by name.
             After building a data structure like this:

                          frequency|tag name
                          ==================
                          000008|mytag
                          010000|anothertag
                          000010|three
                          000010|four
                          000010|six
                          000010|five

             it becomes:

                          frequency|tag_name
                          ==================
                          010000|anothertag
                          000010|six
                          000010|three
                          000010|four
                          000010|five
                          000008|mytag

             where the number of leading zeros for each frequency is computed with:
             base_ten_power = len(str(max(number_of_posts_per_tag))) + 1
             leading_zeros = base_ten_power - len(str(frequency))
{% endcomment %}

{% comment %}Get the frequency of the tag with the maximum frequency.
{% endcomment %}
{% assign x = '' %}
{% for t in site.tags %}
    {% assign x = x | append: t[1].size | append: ',' %}
{% endfor %}
{% assign b = x | split: ',' | sort | last | size %}

{% comment %}Str to int and add a leading zero later.
{% endcomment %}
{% assign base_ten_power = b | plus: 0 | plus: 1 %}

{% assign tags = '' %}
{% assign leading_zeros = '' %}
{% for t in site.tags %}
    {% capture tag_frequency %}{{ t[1].size }}{% endcapture %}
    {% assign len_tag_frequency = tag_frequency | size %}

    {% comment %}Prepend a variable amount of leading '0' charaters so that
                 sorting can be performed correctly.
    {% endcomment %}
    {% assign leading_zeros = '' %}
    {% assign power = base_ten_power | minus: len_tag_frequency %}
    {% for i in (1..power) %}
        {% assign leading_zeros = leading_zeros | append: '0' %}
    {% endfor %}

    {% assign tags = tags | append: leading_zeros | append: t[1].size | append: '|' | append: t[0] | append: '§' %}
{% endfor %}

{% assign sorted_tags = tags | split: '§' | sort_natural | reverse %}

{% if site.limit_tag_links %}
     {% assign s = site.limit_tag_links | plus: 0 %}
     {% assign sorted_tags = sorted_tags | slice: 0, s %}
{% endif %}

<div markdown="0">
    <ul>
    {% for tag_elements in sorted_tags %}
        {% assign tag = tag_elements | split: '|' %}
        {% assign tag_name = tag[1]  %}
        {% assign tagg = tag_name | slugify %}
        {% assign freq = tag[0] | plus: 0 %}
        {% if page.is_home %}
            {% if freq >= site.tag_list.score.min %}
                {% capture link %}{{ site.baseurl }}/tags/#{{ tagg }}{% endcapture %}
                <li>
                    <a href="{{ link }}">{{ tag_name }} [{{ freq }}]</a>
                </li>
            {% endif %}
        {% else %}
            <li>
                <a href="#{{ tagg }}">{{ tag_name }}</a>
            </li>
        {% endif %}
    {% endfor %}
    </ul>
</div>