Rules

#!/usr/bin/env ruby

################################################################################
# Preprocessing
################################################################################

preprocess do
	# Everything in my blog/ dir is an article.
	# Derive the date from the filename (for Jekyll-style post naming)
	@items.each do |item|
		if /\/blog\/[^\/]*\/$/.match(item.identifier)
			item[:kind] = "article"
			item[:layout] = "post"
			unless item[:created_at] 
				if m = /blog\/(\d\d\d\d-\d\d-\d\d)/.match(item.identifier)
					item[:created_at] = m[1]
				end
			end
		end
	end

	# Create paginated article pages (including front page)
	articles_to_paginate = sorted_articles
	article_groups = []
	until articles_to_paginate.empty?
			article_groups << articles_to_paginate.slice!(0..@config[:page_size]-1)
	end
	article_groups.each_with_index do |subarticles, i|
			first = i*config[:page_size] + 1
			last	= (i+1)*config[:page_size]
			if i == 0
				title = "#{@config[:site_title]} | #{@config[:site_subtitle]}"
				id = "/"
			else
				title = "Archive (posts #{first} to #{last})"
				id = "/blog/page#{i+1}"
			end
			items << Nanoc::Item.new("<%= render 'include/blog_page', :item_id => #{i} %>", { 
				:title => title, :created_at => DateTime.now, :paged => true, :kind => "article_list" }, id)
	end

	# Add top feed to all items
	@items.each do |item|
		unless item[:feed]
			item[:feed] = "/feed/"
		end
	end

	# Add tag/category pages and their feed
	["Category", "Tag"].zip([all_article_categories, all_article_tags]) do |(type, names)|
		names.each do |name|
			path = "/blog/#{type.downcase}/#{slugify(name)}"
			articles = "articles_with_#{type.downcase}(\"#{name}\")"
			items << Nanoc::Item.new("<%= render 'include/posts', :posts => #{articles} %>", {
				:title => "#{type}: #{name}",
				:created_at => DateTime.now,
				:feed => "#{path}/feed/",
				:kind => "article_list"
			}, "#{path}")
			items << Nanoc::Item.new("<%= atom_feed :title => \"#{@config[:site_title]} | #{name}\", :author_name => @config[:author_name], :author_uri => @config[:author_uri], :articles => #{articles}, :limit => 10 %>", {}, "#{path}/feed")
		end
	end
end


################################################################################
# Feeds
################################################################################

compile %r<.*/feed/> do
	filter :erb
	filter :git_link_filter
end

route %r<.*/feed/> do
	item.identifier + 'index.xml'
end


################################################################################
# Blog
################################################################################

# Excerpts with a "Read More ..." link
compile '/blog/*', :rep => :linked_excerpt do
	unless item.binary?
		if item[:extension] == "md" or item[:extension] == "markdown"
			filter :rdiscount, :extensions => [:smart]
		end
		filter :more_filter, :more_url => item.path
		filter :git_link_filter
	end
end

route '/blog/*', :rep => :linked_excerpt do
end

route '/blog/*' do
	if item.binary? or item.identifier.end_with? "index"
		item.identifier.chop + '.' + item[:extension]
	else
		item.identifier.gsub(/\d\d\d\d-\d\d-\d\d-/, '') + 'index.html'
	end
end


################################################################################
# Git
################################################################################

# Create a representation for only the top and only the bottom of a dummy page.
# These will be included by CGit as header/footers.
compile '/git', :rep => :top do
	layout 'default'
	filter :split_filter, :delimiter => "<!-- CONTENT -->", :keep => :top
end

compile '/git', :rep => :bottom do
	layout 'default'
	filter :split_filter, :delimiter => "<!-- CONTENT -->", :keep => :bottom
end

route '/git', :rep => :top do
	item.identifier + 'top.html'
end

route '/git', :rep => :bottom do
	item.identifier + 'bottom.html'
end


################################################################################
# Files that need to be preserved as-is
################################################################################

compile '/blank' do
end

route '/blank' do
	item.identifier.chop + '.' + item[:extension]
end


################################################################################
# Default handling
################################################################################

compile '*' do
	unless item.binary?
		filter :erb
		if item[:extension] == "md" or item[:extension] == "markdown"
			filter :rdiscount, :extensions => [:smart]
		end
		snapshot :filtered_contents
		filter :colorize_syntax, :coderay => { :tab_width => 2 }
		if item[:layout] 
			layout item[:layout]
		end
		layout 'default'
		filter :git_link_filter
	end
end

route '*' do
	if item.binary? or item.identifier.end_with? "index"
		item.identifier.chop + '.' + item[:extension]
	else
		# Write item with identifier /foo/ to /foo/index.html
		item.identifier + 'index.html'
	end
end

layout '*', :erb