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tag_index.rb
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tag_index.rb
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module Jekyll
class TagIndex < Page
def initialize(site, base, dir, tag)
@site = site
@base = base
@dir = dir
@name = 'index.html'
self.process(@name)
self.read_yaml(File.join(base, '_layouts'), 'tag_index.html')
self.data['tag'] = tag
tag_title_prefix = site.config['tag_title_prefix'] || 'Posts Tagged “'
tag_title_suffix = site.config['tag_title_suffix'] || '”'
self.data['title'] = "#{tag_title_prefix}#{tag}#{tag_title_suffix}"
end
end
class TagFeed < Page
def initialize(site, base, tag_dir, tag)
@site = site
@base = base
@dir = tag_dir
@name = 'atom.xml'
self.process(@name)
# Read the YAML data from the layout page.
self.read_yaml(File.join(base, '_layouts'), 'tag_feed.xml')
self.data['tag'] = tag
# Set the title for this page.
tag_title_prefix = site.config['tag_title_prefix'] || 'Posts Tagged “'
tag_title_suffix = site.config['tag_title_suffix'] || '”'
self.data['title'] = "#{tag_title_prefix}#{tag}#{tag_title_suffix}"
# Set the meta-description for this page.
# Set the correct feed URL.
self.data['feed_url'] = "#{tag_dir}/#{name}"
end
end
class TagGenerator < Generator
safe true
def generate(site)
if site.layouts.key? 'tag_index'
dir = site.config['tag_dir'] || 'tag'
site.tags.keys.each do |tag|
write_tag_index(site, File.join(dir, tag), tag)
write_tag_feed(site, File.join(dir, tag), tag)
end
end
end
def write_tag_index(site, dir, tag)
index = TagIndex.new(site, site.source, dir, tag)
index.render(site.layouts, site.site_payload)
index.write(site.dest)
site.pages << index
end
def write_tag_feed(site, dir, tag)
feed = TagFeed.new(site, site.source, dir, tag)
feed.render(site.layouts, site.site_payload)
feed.write(site.dest)
site.pages << feed
end
end
# Adds some extra filters used during the category creation process.
module Filters
# Outputs a list of categories as comma-separated <a> links. This is used
# to output the category list for each post on a category page.
#
# +categories+ is the list of categories to format.
#
# Returns string
#
def tag_links(tags)
tags = tags.sort!.map do |item|
"<a class='tag' href='/tag/#{item}/'>#{item}</a>"
end
case tags.length
when 0
""
when 1
tags[0].to_s
else
"#{tags[0...-1].join(', ')}, #{tags[-1]}"
end
end
end
end