require 'tempfile'

class Uri
  #
  def self.escape_raw(st)
    st.gsub(/([^a-zA-Z0-9_\-\.~])/) { "%#{$1.unpack('H*')[0].scan(/../).join('%').upcase }" }
  end

  #
  # usage
  # @search_tag = Uri.unescape_raw(params[:tag]).toutf8
  #
  #
  def self.unescape_raw(st)
    st.tr('+',' ').gsub(/%([A-Fa-f0-9][A-Fa-f0-9])/) { [$1.hex].pack('C') }
  end
end

class Tempfile
  def self.open_with_block(name = nil, dir = nil)
    name ||= (0..8).map{rand(36).to_s(36)}.join
    args = dir ? [name, dir] : [name]
    tmp = Tempfile.open *args
    begin
      yield tmp
    ensure
      tmp.close true
    end
  end
end

class Dir
  def self.mkdir_r(dirPath)
    folders = dirPath.split('/')
    folderToCreate = ''
    folders.each do |folder|
      folderToCreate += folder + '/'
      if !File.directory?(folderToCreate)
        Dir.mkdir(folderToCreate)
      end
    end
  end  
end

class Object
  # http://www.yohasebe.com/pages/trans-seeing-metaclasses-clearly/
  def metaclass
    class << self
      self
    end
  end
 
  # http://www.yohasebe.com/pages/trans-seeing-metaclasses-clearly/
  def meta_eval(&blk)
    metaclass.instance_eval(&blk)
  end
 
  # http://www.yohasebe.com/pages/trans-seeing-metaclasses-clearly/
  def meta_def(name, &blk)
   meta_eval { define_method name, &blk }
  end
 
  # http://www.yohasebe.com/pages/trans-seeing-metaclasses-clearly/
  def class_def(name, &blk)
    class_eval { define_method name, &blk }
  end
  
  # 1.8.7  エミュレート
  def tap
    yield(self)
    self
  end
end