diff options
Diffstat (limited to 'lib/sisu/v2/dal_hash_digest.rb')
| -rw-r--r-- | lib/sisu/v2/dal_hash_digest.rb | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/lib/sisu/v2/dal_hash_digest.rb b/lib/sisu/v2/dal_hash_digest.rb new file mode 100644 index 00000000..a78c54f1 --- /dev/null +++ b/lib/sisu/v2/dal_hash_digest.rb @@ -0,0 +1,155 @@ +# coding: utf-8 +=begin + + * Name: SiSU + + * Description: a framework for document structuring, publishing and search + + * Author: Ralph Amissah + + * Copyright: (C) 1997 - 2010, Ralph Amissah, All Rights Reserved. + + * License: GPL 3 or later: + + SiSU, a framework for document structuring, publishing and search + + Copyright (C) Ralph Amissah + + This program 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 3 of the License, or (at your option) + any later version. + + This program 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 + this program. If not, see <http://www.gnu.org/licenses/>. + + If you have Internet connection, the latest version of the GPL should be + available at these locations: + <http://www.fsf.org/licensing/licenses/gpl.html> + <http://www.gnu.org/copyleft/gpl.html> + + <http://www.jus.uio.no/sisu/gpl.fsf/toc.html> + <http://www.jus.uio.no/sisu/gpl.fsf/doc.html> + <http://www.jus.uio.no/sisu/gpl.fsf/plain.txt> + + * SiSU uses: + * Standard SiSU markup syntax, + * Standard SiSU meta-markup syntax, and the + * Standard SiSU object citation numbering and system + + * Hompages: + <http://www.jus.uio.no/sisu> + <http://www.sisudoc.org> + + * Download: + <http://www.jus.uio.no/sisu/SiSU/download.html> + + * Ralph Amissah + <ralph@amissah.com> + <ralph.amissah@gmail.com> + + ** Description: system environment, resource control and configuration details + +=end +module SiSU_hash + require "#{SiSU_lib}/shared_markup_alt.rb" #shared_markup_alt.rb + class Object_digest + def initialize(md,data,env=nil) + @md,@data,@env=md,data,env + @env ||=SiSU_Env::Info_env.new(@md.fns) + end + def object_digest + # 1. clean/stripped text without any markup, paragraph, headings etc. without endnotes + # 2. endnotes clean/stripped text digest only (there may be several endnotes within a paragraph) + # 3. whole object, text with markup and any endnotes, (question: with or without the endnote digests??? presumption better without, [however may be easier to check with?]) + # [digests should not include other digests] + data=@data + @tuned_file=[] + data.compact! + sha_ =(@env.digest.type=='sha256' ? true : false) + sha_ ? (require 'digest/sha2') : (require 'digest/md5') + data.each do |t_o| + unless t_o.obj.class==Array + t_o.obj.strip! + end + if t_o.of !~/structure|comment|layout/ \ + and t_o.ocn.class==Fixnum + if sha_ + for hash_class in [ Digest::SHA256 ] + @tuned_file << stamped(t_o,hash_class) + end + else + for hash_class in [ Digest::MD5 ] + @tuned_file << stamped(t_o,hash_class) + end + end + else @tuned_file << t_o unless t_o.nil? + end + end + @tuned_file=@tuned_file.flatten + #use md5 or to create hash of each dal object including ocn, & add into to each dal object + end + def endnote_digest(data) + t_o_bit=[] + data.each do |en_plus| + t_o_bit <<= case en_plus + when /#{Mx[:en_a_o]}|#{Mx[:en_b_o]}/ + if en_plus =~/#{Mx[:en_a_o]}.+?#{Mx[:en_a_c]}|#{Mx[:en_b_o]}.+?#{Mx[:en_b_c]}/ + t_o_txt,en_open,en_txt,en_close=/(.*?)(#{Mx[:en_a_o]}|#{Mx[:en_b_o]})(.+?)(#{Mx[:en_a_c]}|#{Mx[:en_b_c]})/m.match(en_plus)[1..4] + stripped_en=SiSU_text_representation::Alter.new(en_txt).strip_clean_of_markup + digest_en_strip=if @env.digest.type =~/sha256/ + Digest::SHA256.hexdigest(stripped_en) + else + Digest::MD5.hexdigest(stripped_en) + end + t_o_txt + en_open + en_txt + Mx[:id_o] + digest_en_strip + Mx[:id_c] + en_close + else puts "Error Exception - problem encountered with:\n#{en_plus}" #arbitrary exception, tidy up + end + else en_plus + end + end + t_o_bit.join + end + def stamped(t_o,hash_class) #decide what hash information is most useful, is compromise necessary? + t_o.obj=SiSU_text_representation::Alter.new(t_o).strip_clean_of_extra_spaces + t_obj=t_o.inspect.sub(/:0x[0-9a-f]{8}\s/,': ') + stripped=SiSU_text_representation::Alter.new(t_o).strip_clean_of_markup + markup=SiSU_text_representation::Alter.new(t_o).semi_revert_markup + digests=SiSU_text_representation::Modified_text_plus_Hash_digest.new(@md,t_o).composite.dgst + unless t_o.is=='code' + case t_o.obj + when /#{Mx[:en_a_o]}[\d*+]+\s+.+?#{Mx[:en_a_c]}|#{Mx[:en_b_o]}[*+]\d+\s+.+?#{Mx[:en_b_c]}/m + en_and_t_o,en_and_t_o_digest=[],[] + t_o.obj.gsub!(/\s*(#{Mx[:en_a_c]}|#{Mx[:en_b_c]})/m,' \1') #watch + t_o_plus_en=t_o.obj.scan(/.*?#{Mx[:en_a_o]}.+?#{Mx[:en_a_c]}|.*?#{Mx[:en_b_o]}.+?#{Mx[:en_b_c]}/m) + t_o_tail=if t_o.obj =~/(?:.*?#{Mx[:en_a_o]}.+?#{Mx[:en_a_c]}|.*?#{Mx[:en_b_o]}.+?#{Mx[:en_b_c]})+([\s\S]+)/m + /(?:.*?#{Mx[:en_a_o]}.+?#{Mx[:en_a_c]}|.*?#{Mx[:en_b_o]}.+?#{Mx[:en_b_c]})+.*/m.match(t_o.obj)[1] + else '' + end + t_o_plus_en << t_o_tail + en_and_t_o_digest << endnote_digest(t_o_plus_en) + t_o_new=en_and_t_o_digest.join(' ') + #@tuned << t_o_new + Mx[:id_o] + digest_strip + ':' + digest_all + Mx[:id_c] unless t_o.nil? + else #@tuned << t_o + Mx[:id_o] + digest_strip + ':' + digest_all + Mx[:id_c] unless t_o.nil? + end + else #@tuned << t_o + Mx[:id_o] + digest_strip + ':' + digest_all + Mx[:id_c] unless t_o.nil? + end + t_o #KEEP intact + end + def strip_clean_extra_spaces(s) # dal output tuned + s=s.dup + s=s.gsub(/[ ]+([,.;:?](?:$|\s))/,'\1') unless s =~/#{Mx[:en_a_o]}|#{Mx[:en_b_o]}/ + s=s.gsub(/ [ ]+/,' ') + s=s.gsub(/^ [ ]+/,'') + s=s.gsub(/ [ ]+$/,'') + s=s.gsub(/((?:#{Mx[:fa_bold_c]}|#{Mx[:fa_italics_c]})')[ ]+(s )/,'\1\2') + s=s.gsub(/((?:#{Mx[:fa_bold_c]}|#{Mx[:fa_italics_c]})')[ ]+(s )/,'\1\2') + end + end +end +__END__ |