#!/usr/bin/env ruby
# -*- coding: utf-8 -*-

# A few helpful tips about the Rules file:
#
# * The string given to #compile and #route are matching patterns for
#   identifiers--not for paths. Therefore, you can’t match on extension.
#
# * The order of rules is important: for each item, only the first matching
#   rule is applied.
#
# * Item identifiers start and end with a slash (e.g. “/about/” for the file
#   “content/about.html”). To select all children, grandchildren, … of an
#   item, use the pattern “/about/*/”; “/about/*” will also select the parent,
#   because “*” matches zero or more characters.

preprocess do
  def reference_links
    # find reference item
    reference = @items.find{|item| item.identifier == '/references/'}
      
    unless reference.nil?
      # add references to every markdown item
      printed_items.each do |item|
        if item[:extension] == "mkd"
          item.add_references reference.raw_content
        end
      end
    end
  end

  def hide_pages
    @items.each do |item|
      if item.identifier.match %r{^/(js|style)/}
        item[:is_hidden] = true
      end
    end
  end
  
  reference_links
  hide_pages
end

compile '/style/' do
  # pass
end

compile '/references' do
  # link references are only added to other files
end

compile '/feed/' do
  filter :erb
end

compile '*' do
  if item.binary?
    # don't filter binary items
  else
    case @item[:extension]
    when "mkd" # normal pages
      # little sanity check
      unless @item[:is_category] or @item[:non_cognitive]
        [:techne, :episteme, :date, :title].each do |header|
          if @item[header].nil?
            puts "#{@item.identifier} is missing #{header}."
          end
        end
      end
      filter :erb
      filter :kramdown
      filter :colorize_syntax, :default_colorizer => :pygmentize
      layout 'default'
      filter :tidy
    else
      # nothing to do
    end
  end
end

route '/feed/' do
  '/rss.xml'
end

route '/htaccess/' do
  '/.htaccess'
end

route '/style/' do
  '/style.css'
end

route '/js/*' do
  route_unchanged
end

route '/kanji/*' do
  route_unchanged
end

route '/references' do
  # pass
end

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

layout '*', :erb