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Addresses issue #42. Allows sorting of collections: arrays or hashes,…
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… ascending or descending.
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groundh0g committed Mar 3, 2015
1 parent c77431d commit 4eebb44
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81 changes: 81 additions & 0 deletions _includes/JB/sort_collection
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{% capture jbcache %}{% comment %}

Sort the given array or map.

Parameters:
collection: the array or map to sort [REQUIRED]
sort_by: the property to sort by [OPTIONAL]
sort_descending: reverse the collection [OPTIONAL]

Returns:
sort_result: the sorted collection

Examples:
<h3>Pages</h3>
<ol>
{% include JB/sort_collection collection=site.pages sort_by="title" %}
{% assign pages_list = sort_result %}
{% include JB/pages_list %}
</ol>

<h3>Pages [Reversed]</h3>
<ol>
{% include JB/sort_collection collection=site.pages sort_by="title" sort_descending=true %}
{% assign pages_list = sort_result %}
{% include JB/pages_list %}
</ol>

<h3>Array</h3>
<ol>
{% assign test_array = "one,two,three,four" | split: "," %}
{% include JB/sort_collection collection=test_array %}
{% for test in sort_result %}
<li>{{test}}</li>
{% endfor %}
</ol>

<h3>Array [Reversed]</h3>
<ol>
{% assign test_array = "one,two,three,four" | split: "," %}
{% include JB/sort_collection collection=test_array sort_descending=true %}
{% for test in sort_result %}
<li>{{test}}</li>
{% endfor %}
</ol>

{% endcomment %}

{% assign is_array = true %}
{% assign sort_result = "," | split: "," %}
{% assign collection = include.collection %}
{% if include.sort_by %}
{% assign sort_by = include.sort_by %}
{% else %}
{% assign sort_by = "title" %}
{% endif %}

{% if collection and collection.size > 0 %}
{% for x in collection.first %}
{% if x[1].size > 0 %}
{% assign is_array = false %}
{% endif %}
{% break %}
{% endfor %}

{% if is_array == false %}
{% assign sort_result = collection | sort: sort_by %}
{% else %}
{% assign sort_result = collection | sort %}
{% endif %}

{% if include.sort_descending %}
{% assign reversed = "," | split: "," %}
{% for index in (1..sort_result.size) %}
{% assign i = sort_result.size | minus: index %}
{% assign reversed = reversed | push: sort_result[i] %}
{% endfor %}
{% assign sort_result = reversed %}
{% assign reversed = nil %}
{% endif %}

{% endif %}{% endcapture %}{% assign jbcache = nil %}

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