aboutsummaryrefslogtreecommitdiffhomepage
path: root/lib/sisu/v5/ao_hash_digest.rb
blob: f732cc636a8be08b18343aa88a32c0f639fc600b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
# encoding: utf-8
=begin

 * Name: SiSU

 * Description: a framework for document structuring, publishing and search

 * Author: Ralph Amissah

 * Copyright: (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
   2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 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/licenses/gpl.html>

   <http://www.sisudoc.org/sisu/en/manifest/gpl.fsf.html>

 * 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>

 * Git
   <http://git.sisudoc.org/gitweb/?p=code/sisu.git;a=summary>
   <http://git.sisudoc.org/gitweb/?p=code/sisu.git;a=blob;f=lib/sisu/v5/ao_hash_digest.rb;hb=HEAD>

 * Ralph Amissah
   <ralph@amissah.com>
   <ralph.amissah@gmail.com>

 ** Description: system environment, resource control and configuration details

=end
module SiSU_AO_Hash
  require_relative 'shared_markup_alt.rb'               #shared_markup_alt.rb
  class ObjectDigest
    def initialize(md,data,env=nil)
      @md,@data,@env=md,data,env
      @env ||=SiSU_Env::InfoEnv.new(@md.fns,@md)
    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.compact
      @tuned_file=[]
      sha_ =@env.digest(@md.opt).type
      begin
        sha_ ? (require 'digest/sha2') : (require 'digest/md5')
      rescue LoadError
        SiSU_Utils::CodeMarker.new(__LINE__,__FILE__,:fuchsia).error(sha_ + ' NOT FOUND')
      end
      data.each do |t_o|
        unless t_o.obj.is_a?(Array)
          t_o.obj=t_o.obj.strip
        end
        if (t_o.of !=:structure \
        && t_o.of  !=:comment \
        && t_o.of  !=:layout) \
        && t_o.ocn.is_a?(Fixnum)
          case sha_
          when :sha512
            for hash_class in [ Digest::SHA512 ]
              @tuned_file << stamped(t_o,hash_class)
            end
          when :sha256
            for hash_class in [ Digest::SHA256 ]
              @tuned_file << stamped(t_o,hash_class)
            end
          when :md5
            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 ao object including ocn, & add into to each ao 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_TextRepresentation::Alter.new(en_txt).strip_clean_of_markup
            digest_en_strip=case @env.digest(@md.opt).type
            when :sha512
              Digest::SHA512.hexdigest(stripped_en)
            when :sha256
              Digest::SHA256.hexdigest(stripped_en)
            when :md5
              Digest::MD5.hexdigest(stripped_en)
            else
              Digest::SHA256.hexdigest(stripped_en)
            end
            t_o_txt +
              en_open +
              en_txt +
              Mx[:id_o] +
              digest_en_strip +
              Mx[:id_c] +
              en_close
          else STDERR.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_TextRepresentation::Alter.new(t_o).strip_clean_of_extra_spaces
      #SiSU_TextRepresentation::Alter.new(t_o).strip_clean_of_markup                      #check
      #SiSU_TextRepresentation::Alter.new(t_o).semi_revert_markup                         #check
      #SiSU_TextRepresentation::ModifiedTextPlusHashDigest.new(@md,t_o).composite.dgst    #check
      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_digest=[]
          t_o.obj=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)
          en_and_t_o_digest.join(' ')
        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)                                            # ao output tuned
      s=s.dup
      s=s.gsub(/[ ]+([,.;:?](?:$|\s))/,'\1') unless s =~/#{Mx[:en_a_o]}|#{Mx[:en_b_o]}/
      s=s.gsub(/ [ ]+/,' ').
        gsub(/^ [ ]+/,'').
        gsub(/ [ ]+$/,'').
        gsub(/((?:#{Mx[:fa_bold_c]}|#{Mx[:fa_italics_c]})')[ ]+(s )/,'\1\2').
        gsub(/((?:#{Mx[:fa_bold_c]}|#{Mx[:fa_italics_c]})')[ ]+(s )/,'\1\2')
    end
  end
end
__END__