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module Jekyll
# Monkey patch so that both GenerateCategoryIndexes and CategoryFilter have access to this method.
class Site
# A very simple implementation.
def parameterize(string, sep = '-')
string.downcase.gsub(/[^a-z0-9\-_]+/, sep)
end
end
class CategoryIndex < Page
def initialize(site, base, dir, category)
@site = site
@base = base
@dir = dir
@name = 'index.html'
self.process(@name)
self.read_yaml(File.join(base, '_layouts'), 'category_index.html')
self.data['category'] = category
title_prefix = site.config['category_title_prefix'] || 'Category: '
self.data['title'] = "#{title_prefix}#{category}"
description_prefix = site.config['category_meta_description_prefix'] || 'Category: '
self.data['description'] = "#{description_prefix}#{category}"
end
end
class GenerateCategoryIndexes < Generator
safe true
priority :low
def generate(site)
if site.config['generate_category_indexes'] && site.layouts.key?('category_index')
dir = site.config['category_dir'] || 'categories'
site.categories.keys.each do |category|
write_category_index(site, File.join("/#{dir}", site.parameterize(category)), category)
end
end
end
def write_category_index(site, dir, category)
index = CategoryIndex.new(site, site.source, dir, category)
index.render(site.layouts, site.site_payload)
index.write(site.dest)
site.pages << index
end
end
module CategoryFilter
def category_links(categories)
site = @context.registers[:site]
directory = site.config['category_dir'] || 'categories'
categories = categories.sort.map do |item|
'<a href="/' + directory + '/' + site.parameterize(item) + '/" rel="category tag" target="_self" title="View all posted in ' + item +'">' + item + '</a>'
end
categories.join(', ')
end
end
end
Liquid::Template.register_filter(Jekyll::CategoryFilter)
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