#--
# ===========================================================================
# Copyright (c) 2005-2012 Christopher Kleckner
# All rights reserved
#
# This file is part of the Rio library for ruby.
#
# Rio is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# Rio is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Rio; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
# =========================================================================== 
#++
#


#require 'rio/cp'
#require 'rio/piper/cp'
#require 'rio/ops/either'

# module RIO
#   module Impl
#     module U
#       def self.copy(s,d)
#         require 'fileutils'
#         ::FileUtils.cp(s.to_s,d.to_s)
#       end
#       def self.rm(s)
#         require 'fileutils'
#         ::FileUtils.rm(s.to_s)
#       end
#       def self.touch(s)
#         require 'fileutils'
#         ::FileUtils.touch(s.to_s)
#       end
#     end
#   end
# end
module RIO
  module Ops
    module File
      module ExistOrNot
        include FileOrDir::ExistOrNot
       end
      module Existing
        include ExistOrNot
        include FileOrDir::Existing
        include Cp::File::Output
        include Cp::File::Input
        include Piper::Cp::Input

        def selective?
          %w[stream_sel stream_nosel].any? { |k| cx.has_key?(k) }
        end
        def empty?() 
          self.selective? ? self.to_a.empty? : self.size == 0 
        end
        def delete(*args) 
          rtn_reset { 
            fs.delete(self,*args) 
          } 
        end
        alias :rm :delete
        alias :unlink :delete
        alias :delete! :delete
        def touch(*args) rtn_self { fs.touch(self.to_s,*args) } end
        def truncate(sz=0) 
          rtn_reset { 
            sz = 0 if sz < 0
            fs.truncate(self.to_s,sz) 
          } 
        end
        def clear() truncate(0) end
      end
      module NonExisting
        include ExistOrNot
        include FileOrDir::NonExisting

        def delete(*args) rtn_self { ; } end
        alias :rm :delete
        alias :unlink :delete
        alias :delete! :delete
        def touch(*args) 
          rtn_reset { 
            # fs.touch(self,*args) 
            ::File.open(self.to_s, 'a') {
              ;
            }
          }
 
        end
        def truncate(sz=0) self.touch.truncate(sz) end
      end
    end
  end
end