# MIT License
# 
# Copyright (c) 2017 David Southgate (davidsouthgate.co.uk)
# 
# 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.
module Jekyll
  module EmailObfuscate
    module EmailObfuscateFilter
      def encode_email(input)
        return encode(input);
      end
      def encode_email_href(input)
        input.to_s.chars.inject(String.new) do |result, char|
          if char =~ /\p{Alnum}/
            char.bytes.inject(result) do |result, byte|
              result << '%%%02X' % byte
            end
          else
            result << char
          end
        end
      end
      private
      def encode(str)
        ret = "";
        str.each_byte do |i|
          if (i>=33 && i<=126)
            ret = ret + "&#" + i.to_s + ";";
          else
            ret = ret + i.chr;
          end
        end
        return ret;
      end
    end
  end
end
Liquid::Template.register_filter(Jekyll::EmailObfuscate::EmailObfuscateFilter)
