# hx/rack/application - Rack application to serve an Hx site dynamically
#
# Copyright (c) 2009-2010 MenTaLguY <mental@rydia.net>
# 
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
# 
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

require 'cgi'
require 'hx'
require 'rack/mime'

module Hx
module Rack

class Application
  def self.load_file(config_path)
    site = Hx::Site.load_file(config_path)
    new(site, site.options)
  end

  def initialize(input, options)
    @input = input
    @index_names = Array(options[:index_names] || ['index.html'])
  end

  def call(env)
    path = CGI.unescape(env['PATH_INFO'])
    path = '/' if path.empty?
    entry = nil

    has_trailing_slash = (path[-1..-1] == '/')

    # for non-slash-terminated paths, try the path directly
    unless has_trailing_slash
      begin
        effective_path = path[1..-1]
        entry = @input.get_entry(effective_path)
      rescue NoSuchEntryError
      end
    end

    # no entry? maybe it's a directory; look for an index entry
    unless entry
      path =~ %r(^/(.*?)/?$)
      prefix = $1
      prefix = "#{prefix}/" unless prefix.empty?
      for index_name in @index_names
        begin
          effective_path = "#{prefix}#{index_name}"
          entry = @input.get_entry(effective_path)
          break
        rescue NoSuchEntryError
        end
      end

      # directory exists, but missing trailing slash?
      if entry and not has_trailing_slash
        return [301, {'Content-Type' => 'text/plain',
                      'Location' => "#{env['SCRIPT_NAME']}#{path}/"},
                ["301 Moved Permanently"]]
      end
    end

    if entry
      content_type = entry['content_type'] 
      unless content_type
        effective_path =~ /(\.[^.]+)$/
        content_type = ::Rack::Mime.mime_type($1 || '')
      end
      content = entry['content'].to_s
      [200, {'Content-Type' => content_type}, [content]]
    else
      message = "#{env['SCRIPT_NAME']}#{path} not found"
      [404, {'Content-Type' => "text/plain"}, [message]]
    end
  end
end

end
end