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# 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 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>

 * Download:
   <http://www.sisudoc.org/sisu/en/SiSU/download.html>

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

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

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

=end
module SiSU_DAL_BookIndex
  class BookIndex
    def initialize(md,data,env=nil)
      @md,@data,@env=md,data,env
      @rgx_idx=/#{Mx[:idx_o]}(?:.+?)#{Mx[:idx_c]}\s*/
      @rgx_idx_ocn_seg=/(.+?)~(\d+)~(\S+)/
      @rgx_idx_ocn=/(.+?)~(\d+)/
      @env ||=SiSU_Env::InfoEnv.new(@md.fns)
    end
    def indexing_song
      data=@data
      data,sisu_markup_idx_rel,sisu_markup_idx_rel_html_seg,html_idx,xhtml_idx=extract_book_index(data)
      data=clean_and_insert_index(data,sisu_markup_idx_rel_html_seg)
      [data,sisu_markup_idx_rel,sisu_markup_idx_rel_html_seg,html_idx,xhtml_idx]
    end
    def extract_book_index(data)
      tuned_file=[]
      idx_array=[]
      data.each do |dob|
        if (dob.is ==:heading \
        || dob.is ==:heading_insert) \
        && dob.ln==4
          @seg=dob.name
        end
        if defined? dob.idx \
        and dob.idx.is_a?(String) \
        and not dob.idx.empty?
          idx_array << "#{dob.idx}~#{dob.ocn}~#{@seg}"
        end
        tuned_file << dob if dob
      end
      idx_array=construct_idx_array(idx_array) if idx_array.length > 0
      if idx_array.length > 0
        the_idx=construct_book_index(idx_array)
        sisu_markup_idx_rel,sisu_markup_idx_rel_html_seg,html_idx,xhtml_idx=nil,nil,nil,nil
        if @md.book_idx
          idx=index(the_idx)
          sisu_markup_idx_rel,sisu_markup_idx_rel_html_seg,html_idx,xhtml_idx=idx[:sst_rel],idx[:sst_rel_html_seg],idx[:html],idx[:xhtml]
        end
      end
      [tuned_file,sisu_markup_idx_rel,sisu_markup_idx_rel_html_seg,html_idx,xhtml_idx]
    end
    def construct_idx_array(idx_array)
      idx_lst=[]
      idx_array.each do |idx|
        idx_list,ocn,seg=@rgx_idx_ocn_seg.match(idx)[1..3]
        idx_lst <<=if idx_list =~/;/
          g=idx_list.scan(/[^;]+/)
          idxl=[]
          g.each do |i|
            i=i.strip
            idxl << { rough_idx: i, ocn: ocn, seg: seg }
          end
          idxl
        else { rough_idx: idx_list, ocn: ocn, seg: seg }
        end
      end
      idx_lst=idx_lst.flatten
    end
    def construct_book_index(idx_array)
      the_idx={}
      idx_array.each do |idx|
        if idx[:rough_idx] =~/[|]/ \
        && idx[:rough_idx] !~/[:]/
          if @md.opt.cmd =~/[MVv]/
            p 'book index error? --> ' + idx[:rough_idx]
          end
        else
          idx_lst=idx[:rough_idx].scan(/[^|:]+/)
          idx_lst[0]=idx_lst[0].strip
          if idx_lst[0] =~/.+?\+\d+/
            use,plus=/(.+?)\+(\d+)/.match(idx_lst[0])[1,2]
          else use=idx_lst[0]
          end
          use=use[0].chr.capitalize + use[1,use.length]
          the_idx[use]={} unless the_idx[use] and defined? the_idx[use]
          idx_lst.each do |i|
            i=i.strip
            i,r=/(.+?)\+(\d+)/.match(i)[1,2] if i =~/.+?\+\d+/
            x=if idx_lst.length==1 or idx_lst[0].gsub(/\+\d+/,'')==i
              the_idx[use]['term_node_lev1']=[] unless the_idx[use]['term_node_lev1'] and defined? the_idx[use]['term_node_lev1']
              x=if r
                the_idx[use]['term_node_lev1'] << { ocn: idx[:ocn], range: "#{idx[:ocn]}-#{idx[:ocn].to_i+r.to_i}", seg: idx[:seg] }
                "#{i} #{idx[:ocn]}-#{idx[:ocn].to_i+r.to_i}"
              else
                the_idx[use]['term_node_lev1'] << { ocn: idx[:ocn], seg: idx[:seg] }
                "#{i} #{idx[:ocn]}"
              end
            else
              the_idx[use]['term_node_lev2']={} unless the_idx[use]['term_node_lev2'] and defined? the_idx[use]['term_node_lev2']
              the_idx[use]['term_node_lev2'][i]=[] unless the_idx[use]['term_node_lev2'][i] and defined? the_idx[use]['term_node_lev2'][i]
              x=if r
                the_idx[use]['term_node_lev2'][i] << { ocn: idx[:ocn], range: "#{idx[:ocn]}-#{idx[:ocn].to_i+r.to_i}", seg: idx[:seg] }
                "#{idx_lst[0]}:#{i} #{idx[:ocn]}-#{idx[:ocn].to_i+r.to_i}"
              else
                the_idx[use]['term_node_lev2'][i] << { ocn: idx[:ocn], seg: idx[:seg] }
                "#{idx_lst[0]}:#{i} #{idx[:ocn]}"
              end
            end
          end
        end
      end
      the_idx=the_idx.sort
      the_idx
    end
    def clean_xml(str)
      str=str.gsub(/&/,'&amp;')
      str
    end
    def index(the_idx)
      @x=1
      idx={}
      idx[:sst_rel_html_seg],idx[:sst_rel],idx[:html],idx[:xhtml]=[],[],[],[]
      h={obj: Mx[:br_page]}
      o=SiSU_DAL_DocumentStructure::ObjectLayout.new.break(h)
      idx[:sst_rel_html_seg] << o
      idx[:sst_rel] << o
      h={lv: '2', name: 'index', obj: "Index"}
      o=SiSU_DAL_DocumentStructure::ObjectHeading.new.heading(h)
      idx[:sst_rel_html_seg] << o
      idx[:sst_rel] << o
      h={lv: '4', name: 'idx', obj: " [Index] #{Mx[:pa_non_object_dummy_heading]}"}
      o=SiSU_DAL_DocumentStructure::ObjectHeading.new.heading(h)
      idx[:sst_rel_html_seg] << o
      idx[:sst_rel] << o
      alph=%W[9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z]
      idx[:html] << '<p>'
      idx[:xhtml] << '<p>'
      alph.each do |x|
        if x =~/[0-9]/
          idx[:html] << ''
          idx[:xhtml] << ''
        else
          idx[:html] << %{<a href="##{x}">#{x}</a>,#{$ep[:hsp]}}
          idx[:xhtml] << %{<a href="##{x.downcase}">#{x}</a>,#{$ep[:hsp]}}
        end
      end
      idx[:html] << '</p>'
      idx[:xhtml] << '</p>'
      letter=alph.shift
      idx[:html] << %{\n<p class="book_index_lev1"><a name="numeral"></a></p>}
      idx[:xhtml] << %{\n<p class="letter" id="numeral">0 - 9</p>}
      the_idx.each do |i|
        i.each do |x|
          if x.is_a?(String)
            f=/^(\S)/.match(x)[1]
            if letter < f
              while letter < f
                if alph.length > 0
                  letter=alph.shift
                  idx[:html] << %{\n<p class="letter"><a name="#{letter}">#{letter}</a></p><p class="book_index_lev1"><a name="#{letter.downcase}"> </a></p>}
                  idx[:xhtml] << %{\n<p class="letter" id="#{letter.downcase}">#{letter}</p>}
                else break
                end
              end
            end
            idx[:sst_rel_html_seg] << %{\n\n#{Mx[:fa_bold_o]}#{x},#{Mx[:fa_bold_c]} }
            idx[:sst_rel] << %{\n\n#{Mx[:fa_bold_o]}#{x},#{Mx[:fa_bold_c]} }
            aname=x.gsub(/\s+/,'_')
            idx[:html] << %{\n<p class="book_index_lev1"><a name="#{aname}"><b>#{x}</b></a>, }
            c=clean_xml(x.dup)
            idx[:xhtml] << %{\n<p class="book_index_lev1"><b>#{c}</b>, }
            @o=idx[:sst_rel_html_seg].index(idx[:sst_rel_html_seg].last)
            @t=idx[:sst_rel].index(idx[:sst_rel].last)
            @q=idx[:html].index(idx[:html].last)
            @r=idx[:xhtml].index(idx[:xhtml].last)
            print "\n" + x + ', ' if @md.opt.cmd =~/V/
          elsif x.is_a?(Array)
            p 'array error? -->'
            print x
          elsif x.is_a?(Hash)
            if x['term_node_lev1'].is_a?(Array)
              x['term_node_lev1'].each do |a|
                if a[:range]
                  idx[:sst_rel_html_seg][@o]=idx[:sst_rel_html_seg][@o] + %{#{Mx[:lnk_o]}#{a[:range]}#{Mx[:lnk_c]}#{Mx[:rel_o]}/#{a[:seg]}.html##{a[:ocn]}#{Mx[:rel_c]}, }
                  idx[:sst_rel][@t]=idx[:sst_rel][@t] + %{#{Mx[:lnk_o]}#{a[:range]}#{Mx[:lnk_c]}#{Mx[:rel_o]}#{a[:ocn]}#{Mx[:rel_c]}, }
                  idx[:html][@q]=idx[:html][@q] + %{<a href="#{a[:seg]}.html##{a[:ocn]}">#{a[:range]}</a>, }
                  idx[:xhtml][@q]=idx[:xhtml][@q] + %{<a href="#{a[:seg]}.xhtml#o#{a[:ocn]}">#{a[:range]}</a>, }
                  print a[:range] + ', ' if @md.opt.cmd =~/V/
                elsif a[:ocn]
                  idx[:sst_rel_html_seg][@o]=idx[:sst_rel_html_seg][@o] + %{#{Mx[:lnk_o]}#{a[:ocn]}#{Mx[:lnk_c]}#{Mx[:rel_o]}#{a[:seg]}.html##{a[:ocn]}#{Mx[:rel_c]}, }
                  idx[:sst_rel][@t]=idx[:sst_rel][@t] + %{#{Mx[:lnk_o]}#{a[:ocn]}#{Mx[:lnk_c]}#{Mx[:rel_o]}#{a[:ocn]}#{Mx[:rel_c]}, }
                  idx[:html][@q]=idx[:html][@q] + %{<a href="#{a[:seg]}.html##{a[:ocn]}">#{a[:ocn]}</a>, }
                  idx[:xhtml][@q]=idx[:xhtml][@q] + %{<a href="#{a[:seg]}.xhtml#o#{a[:ocn]}">#{a[:ocn]}</a>, }
                  print a[:ocn] + ', ' if @md.opt.cmd =~/V/
                else p 'error'
                end
              end
              idx[:html][@q]=idx[:html][@q] + '</p>'
              idx[:xhtml][@r]=idx[:xhtml][@r] + '</p>'
            end
            if x['term_node_lev2']
              m=x['term_node_lev2']
              m=m.sort
              m.each do |k,y|
                if k !~/term_node_lev1/
                  idx[:sst_rel_html_seg][@o]=idx[:sst_rel_html_seg][@o] + %{#{k}, }
                  idx[:sst_rel][@t]=idx[:sst_rel][@t] + %{#{k}, }
                  idx[:html][@q]=idx[:html][@q] + %{\n<p class="book_index_lev2">#{k}, }
                  c=clean_xml(k.dup)
                  idx[:xhtml][@r]=idx[:xhtml][@r] + %{\n<p class="book_index_lev2">#{c}, }
                  print "\n\t" + k + ', ' if @md.opt.cmd =~/V/
                  y.each do |z|
                    if z[:range]
                      idx[:sst_rel_html_seg][@o]=idx[:sst_rel_html_seg][@o] + %{#{Mx[:lnk_o]}#{z[:range]}#{Mx[:lnk_c]}#{Mx[:rel_o]}#{z[:seg]}.html##{z[:ocn]}#{Mx[:rel_c]}, }
                      idx[:sst_rel][@t]=idx[:sst_rel][@t] + %{#{Mx[:lnk_o]}#{z[:range]}#{Mx[:lnk_c]}#{Mx[:rel_o]}#{z[:ocn]}#{Mx[:rel_c]}, }
                      idx[:html][@q]=idx[:html][@q] + %{<a href="#{z[:seg]}.html##{z[:ocn]}">#{z[:range]}</a>, }
                      idx[:xhtml][@q]=idx[:xhtml][@q] + %{<a href="#{z[:seg]}.xhtml#o#{z[:ocn]}">#{z[:range]}</a>, }
                      print z[:range] + ', ' if @md.opt.cmd =~/V/
                    elsif z[:ocn]
                      idx[:sst_rel_html_seg][@o]=idx[:sst_rel_html_seg][@o] + %{#{Mx[:lnk_o]}#{z[:ocn]}#{Mx[:lnk_c]}#{Mx[:rel_o]}#{z[:seg]}.html##{z[:ocn]}#{Mx[:rel_c]}, }
                      idx[:sst_rel][@t]=idx[:sst_rel][@t] + %{#{Mx[:lnk_o]}#{z[:ocn]}#{Mx[:lnk_c]}#{Mx[:rel_o]}#{z[:ocn]}#{Mx[:rel_c]}, }
                      idx[:html][@q]=idx[:html][@q] + %{<a href="#{z[:seg]}.html##{z[:ocn]}">#{z[:ocn]}</a>, }
                      idx[:xhtml][@q]=idx[:xhtml][@q] + %{<a href="#{z[:seg]}.xhtml#o#{z[:ocn]}">#{z[:ocn]}</a>, }
                      print z[:ocn] + ', ' if @md.opt.cmd =~/V/
                    else p 'error'
                    end
                  end
                  idx[:html][@q]=idx[:html][@q] + '</p>'
                  idx[:xhtml][@r]=idx[:xhtml][@r] + '</p>'
                end
              end
            end
            idx
            @x +=1
          end
        end
      end
      print "\n" if @md.opt.cmd =~/V/
      idx
    end
    def screen_print(the_idx)
      the_idx.each do |i|
        i.each do |x|
          if x.is_a?(String)
            print "\n" + x + ', '
          elsif x.is_a?(Array)
            p 'array error? -->'
            print x
          elsif x.is_a?(Hash)
            if x['term_node_lev1'].is_a?(Array)
              x['term_node_lev1'].each do |a|
                if a[:range]
                  print a[:range] + ', '
                elsif a[:ocn]
                  print a[:ocn] + ', '
                else p 'error'
                end
              end
            end
            if x['term_node_lev2']
              m=x['term_node_lev2']
              m=m.sort
              m.each do |k,y|
                if k !~/term_node_lev1/
                  print "\n\t" + k + ', '
                  y.each do |z|
                    if z[:range]
                      print z[:range] + ', '
                    elsif z[:ocn]
                      print z[:ocn] + ', '
                    else p 'error'
                    end
                  end
                end
              end
            end
          end
        end
      end
    end
    def output_idx(idx)
      if @md.book_idx
        path="#{@env.path.output}/#{@md.fnb}"
        Dir.mkdir(path) unless FileTest.directory?(path)
        puts "#{path}/#{@md.fn[:book_idx_html]} #{__FILE__}::#{__LINE__}"
        html_index_file=File.new("#{path}/#{@md.fn[:book_idx_html]}",'w')
        idx[:html].each {|x| html_index_file << x }
        html_index_file.close
      end
    end
    def clean_and_insert_index(data,sisu_markup_idx)
      tuned_file=[]
      data.each do |dob|
        tuned_file << dob
        if dob.obj =~/#{Mx[:br_endnotes]}/ \
        and sisu_markup_idx
          sisu_markup_idx.each do |idx|
            tuned_file << idx
          end
        end
      end
      tuned_file
    end
    def clean_index(data)                                  #check on use of dob
      tuned_file=[]
      data.each do |para|
        para=para.gsub(/\n*#{@rgx_idx}/m,'')
        tuned_file << para
      end
      tuned_file
    end
  end
end
__END__