#!/usr/bin/env ruby

#--
# Copyright (c) 2006 Jeff Barczewski
#
# 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.
#++
#
# Setup hook to insert MasterView changed-template reparsing
# into the Rails request dispatching handler in ActionController::Base.
# 
# Ensures that masterview output files are always current while running a
# Rails application.  Should generally be enabled/disabled in conjunction
# with Rails class load caching, which is normally off in a development
# environment configuration.  Requires that masterview templates be
# parsed at application startup to properly initialize the mechanism
# to detect template changes after application startup.
# 

#--
# DBC-style notation per DbC - rubydbc-0.1 (Andy Hunt's Design by Contract)
#pre( MasterView::ParseMasterViewTemplatesAtStartup )
#pre( MasterView::ReparseChangedMasterViewTemplates )
#pre( defined?(ActionController) &&  ActionController::Base.perform_caching )
#++
#


MasterView::Log.info { 'Adding hook to allow MasterView to check for templates that have changed when processing a request' }

module ActionController #:nodoc:
  class Base #:nodoc
    # Install hook to enable MasterView to detect and automatically reparse
    # changed templates during Rails request dispatching.
    alias :process_pre_mv :process #:nodoc:
    def process(request, response, method = :perform_action, *arguments) #:nodoc:
      MasterView::TemplateWatcher.check_updated(MasterView::IOMgr.template, MasterView::TemplateFilenamePattern ) do |mio| 
        MasterView::Parser.parse_mio( mio, MasterView::IOMgr.erb )
      end
      process_pre_mv(request, response, method, *arguments)
    end
  end
end

MasterView::LoadedFeatures[:rails_reparse_checking] = true