module Jagua
	class Engine
		def initialize(res_path)
			$RES_PATH = res_path
			require 'rubygems'; require 'activerecord'; require 'erb'
			ActiveRecord::Base.establish_connection(YAML.load_file('db/conf.yml'))
			Dir['db/models/*'].each do |model|; require model; end
		end
		def republish_blog(blog)
			# copiar todo excepto los templates
			system("cp #{File.join(blog.theme.path, '*.css')} #{blog.local_path} -Rf")
			# paginas individuales
			blog.posts.each do |post|
				open(post.local_path, 'w') do |f|
					f.print publish_post(post, :complete)
				end
			end
			# archivos mensuales
			# portada + feed rss
			s = ""
			latest_posts = blog.posts.find( :all, :order => 'created_at DESC', :limit => 20 )
			latest_posts.each do |post|
				s += publish_post(post, :partial)
			end
			open(File.join(blog.local_path, 'index.html'), 'w') do |f|
				f.print(blog.theme.render_with(s, blog))
			end
			# RSS...
			open(File.join(blog.local_path, 'feed.xml'), 'w') do |f|
				f.print generate_rss_feed(latest_posts)
			end
		end
		def publish_post(post, action)
			@post = post.render_attributes
			rendered_post = ERB.new(File.read(File.join(post.blog.theme.path, 'post.html'))).result(binding)
			if action == :complete
				# layout + post
				return post.blog.theme.render_with(rendered_post, post.blog)
			else
				# post (partial)
				return rendered_post
			end
		end
		def generate_rss_feed(posts)
			require 'rss/maker'
			content = RSS::Maker.make('2.0') do |s|
				s.channel.title = posts[0].blog.title
				s.channel.link = posts[0].blog.public_path
				s.channel.description = posts[0].blog.description
				s.items.do_sort = true
				posts.each do |post|
					p = s.items.new_item
					p.title = post.title
					p.description = post.content[0,250]
					p.link = post.public_path
					p.date = post.created_at
				end
			end
			return content.to_s
		end
	end
end