# hx/backend/hobix - Hobix filesystem backend for Hx
#
# 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 'pathname'
require 'hx'
require 'find'

module Hx
module Backend

class RawFiles
  include Hx::Filter

  def initialize(input, options)
    @entry_dir = Hx.get_pathname(options, :entry_dir)
    @postedit_cmd = options[:postedit_cmd]
    @postdelete_cmd = options[:postdelete_cmd]
    @postedit_cmd = @postedit_cmd.split(/\s+/) if @postedit_cmd
    @postdelete_cmd = @postdelete_cmd.split(/\s+/) if @postdelete_cmd
  end

  def path_to_pathname(path) ; @entry_dir + path ; end
  private :path_to_pathname

  def edit_entry(path, prototype=nil)
    pathname = path_to_pathname(path)
    begin
      text = pathname.read
    rescue Errno::ENOENT
      raise NoSuchEntryError, path unless prototype
      text = prototype['content'].to_s
    end
    text = yield text
    if text
      Hx.write_file(pathname, text)
      system *(@postedit_cmd + [pathname]) if @postedit_cmd
    else
      begin
        File.unlink(pathname)
        system *(@postdelete_cmd + [pathname]) if @postdelete_cmd
      rescue Errno::ENOENT
      end
    end
    self
  end

  def each_entry_path(selector)
    Find.find @entry_dir.to_s do |fs_path|
      next unless FileTest.file? fs_path
      path = Pathname.new(fs_path).relative_path_from(@entry_dir).to_s
      yield path if selector.accept_path? path
    end
    self
  end

  def get_entry(path)
    pathname = path_to_pathname(path)
    begin
      { 'updated' => pathname.mtime,
        'executable' => pathname.executable?,
        'content' => Hx::LazyContent.new { pathname.read } }
    rescue Errno::ENOENT
      raise Hx::NoSuchEntryError, path
    end
  end
end

end
end