Piano Rest - Revisiting (major refactor)

Pianofile

$LOAD_PATH << File.expand_path( "lib" )
require "piano/fast"
require "piano/rest"

disable :etags
enable :sessions

post "/" do
  resource :index
  save_data params
  flash "Saved some data"
  redirect back, params.to_json
end

put %r{^/(.*?):(.+?)$} do |resource_text, item_text|
  resource resource_text
  params["id"] = item_text
  params.delete "captures"
  
  save_data params
  flash "Updated #{item_text}"
  status 201
  headers \
    "Location" => "/#{resource}:#{item_text}"
  body params.to_json
end

delete %r{^/(.*?):(.+?)$} do |resource_text, item_text|
  resource_text = "index" if resource_text.nil?
  resource resource_text
  delete_data item_text
  
  flash "Deleted #{item_text}"
  status 201
  headers \
    "Location" => "/#{resource}"
end

get %r{^/(.*?):(.+?)$} do |resource_text, item|
  resource_text = "index" if resource_text.nil?
  resource resource_text
  @content = from.yaml "data/#{resource}/#{item}.yaml"
  try_haml resource.to.symbol
end

get %r{^/(.+?).js$} do |resource_text|
  content_type resource.media_type.to.symbol
  coffee resource.to.symbol
end

get %r{^/(.+?).css$} do |resource_text|
  content_type resource.media_type.to.symbol
  sass resource.to.symbol
end

get %r{^/(.+?)$} do |resource_text|
  try_haml resource.to.symbol
end

get "/" do
  try_haml resource.to.symbol
end

before %r{^/(.*?)(\.\w+)?$} do |resource_name, media_type|
  resource_name = "index" if resource_name == ""
  resource resource_name
  
  resource.media_type = media_type[1..-1] if media_type
end

helpers do
  def save_data data
    dir! "data/#{resource}"
    file.append "data/#{resource}/" + link( data[:id] ) + ".yaml", data.to_yaml
  end
  
  def delete_data data
    file.delete "data/#{resource}/#{data}.yaml"
  end
  
  def items
    return [] unless dir? "data/#{resource}"

    dir "data/#{resource}", 
		:extension => :yaml, 
		:strip_extension => true
  end
  
  def resource symbol = nil
    return session[:resource] unless symbol
	
    session[:resource] = Piano::Rest::Resource.new symbol
  end
end