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+-*- mode: org -*-
+#+TITLE:       sisu harvest
+#+DESCRIPTION: documents - structuring, various output representations & search
+#+FILETAGS:    :sisu:harvest:
+#+AUTHOR:      Ralph Amissah
+#+EMAIL:       [[mailto:ralph.amissah@gmail.com][ralph.amissah@gmail.com]]
+#+COPYRIGHT:   Copyright (C) 2015 - 2021 Ralph Amissah
+#+LANGUAGE:    en
+#+STARTUP:     content hideblocks hidestars noindent entitiespretty
+#+OPTIONS:     H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil _:nil -:t f:t *:t <:t
+#+PROPERTY:    header-args  :exports code
+#+PROPERTY:    header-args+ :noweb yes
+#+PROPERTY:    header-args+ :eval no
+#+PROPERTY:    header-args+ :results no
+#+PROPERTY:    header-args+ :cache no
+#+PROPERTY:    header-args+ :padline no
+
+* harvest
+** html_harvest.rb
+
+#+BEGIN_SRC ruby  :tangle "../lib/sisu/html_harvest.rb"
+# <<sisu_document_header>>
+module SiSU_Harvest
+  @@the_idx_topics,@@the_idx_authors={},{}
+  class Source
+    require_relative 'hub_options'                          # hub_options.rb
+    require_relative 'html_harvest_topics'                  # html_harvest_topics.rb
+    require_relative 'html_harvest_authors'                 # html_harvest_authors.rb
+    require_relative 'se'                                   # se.rb
+      include SiSU_Env
+    def initialize(opt)
+      @opt=opt
+      @env=SiSU_Env::InfoEnv.new
+    end
+    def read
+      begin
+        harvest_pth=@env.path.webserv + '/' + @opt.base_stub
+        FileUtils::mkdir_p(harvest_pth) unless FileTest.directory?(harvest_pth)
+        cases(@opt,@env)
+      rescue
+      ensure
+        SiSU_Env::CreateSite.new(@opt).cp_css
+      end
+    end
+    def help
+      puts <<WOK
+      harvest --harvest   extracts document index metadata
+
+WOK
+    end
+    def css(opt)
+      require_relative 'css'                                # css.rb
+      css=SiSU_Style::CSS.new
+      fn_css=SiSU_Env::CSS_Default.new
+      style=File.new("#{@env.path.pwd}/#{fn_css.harvest}",'w')
+      style << css.harvest
+      style.close
+    end
+    def cases(opt,env)
+      case opt.selections.str.inspect
+      when/--harvest/i
+        css(opt) if @opt.act[:maintenance][:set]==:on
+        SiSU_HarvestAuthors::Songsheet.new(opt,env).songsheet
+        SiSU_HarvestTopics::Songsheet.new(opt,env).songsheet
+        if @opt.act[:rsync][:set]==:on
+          require_relative 'remote'                         # remote.rb
+          SiSU_Remote::Put.new(opt).rsync_harvest
+        end
+      else
+        help
+      end
+    end
+  end
+end
+#+END_SRC
+
+** topics
+*** html_harvest_topics.rb
+
+#+BEGIN_SRC ruby  :tangle "../lib/sisu/html_harvest_topics.rb"
+# <<sisu_document_header>>
+module SiSU_HarvestTopics
+  require_relative 'html_harvest_author_format'          # html_harvest_author_format.rb
+  require_relative 'html_parts'                          # html_parts.rb
+  class Songsheet
+    @@the_idx_topics={}
+    def initialize(opt,env)
+      @opt,@env=opt,env
+      @file_list=opt.files
+    end
+    def songsheet
+      idx_array={}
+      @opt.f_pths.each do |y|
+        lang_hash_file_array={}
+        name=y[:f]
+        filename=y[:pth] + '/' + y[:f]
+        File.open(filename,'r') do |file|
+          file.each_line("\n\n") do |line|
+            if line =~/^@(?:title|creator|classify):(?:\s|$)/m
+              lang_hash_file_array[y[:lng_is]] ||= []
+              lang_hash_file_array[y[:lng_is]] << line
+            elsif line =~/^@\S+?:(?:\s|$)/m \
+            or line =~/^(?:\s*\n|\s*$|%+ )/
+            else break
+            end
+          end
+        end
+        lang_hash_file_array.each_pair do |lang,a|
+          idx_array[lang] ||=[]
+          idx_array=SiSU_HarvestTopics::Harvest.new(
+            @opt,
+            @env,
+            a,
+            filename,
+            name,
+            idx_array,
+            lang
+          ).extract_harvest
+        end
+      end
+      the_hash=SiSU_HarvestTopics::Index.new(
+        @opt,
+        @env,
+        idx_array,
+        @@the_idx_topics
+      ).song
+      SiSU_HarvestTopics::OutputIndex.new(
+        @opt,
+        the_hash
+      ).html_print.html_songsheet
+    end
+  end
+  class Mix
+    def spaces
+      Ax[:spaces]
+    end
+  end
+  class Harvest
+    def initialize(opt,env,data,filename,name,idx_array,lang)
+      @opt, @env,@data,@filename,@name,@idx_array,@lang=
+        opt,env, data, filename, name, idx_array, lang
+    end
+    def extract_harvest
+      data,   filename, name, idx_array, lang=
+        @data,@filename,@name,@idx_array,@lang
+      @idx_lst=@title=@subtitle=@fulltitle=@author=@author_format=nil
+      rgx={}
+      rgx[:author]=/^@creator:(?:[ ]+|.+?:author:[ ]+)(.+?)(?:\||\n)/m
+      rgx[:title]=/^@title:[ ]+(.+)/
+      rgx[:subtitle]=/^@title:.+?:subtitle:[ ]+(.+?)\n/m
+      rgx[:idx]=/^@classify:.+?:topic_register:[ ]+(.+?)(?:\n\n|\n\s+:\S|\n%)/m
+      data.each do |para|
+        if para=~ rgx[:idx]
+          @idx_list=(rgx[:idx].match(para)[1]).split(/\s*\n\s*/).join
+        end
+        if para=~ rgx[:title]
+          @title=rgx[:title].match(para)[1]
+        end
+        if para=~ rgx[:subtitle]
+          @subtitle=rgx[:subtitle].match(para)[1]
+        end
+        if para=~ rgx[:author]
+          @author_format=rgx[:author].match(para)[1]
+        end
+        break if @title && @subtitle && @author && @idx_lst
+      end
+      @fulltitle=@subtitle ? (@title + ' - ' + @subtitle) : @title
+      if @title \
+      and @author_format \
+      and @idx_list
+        creator=SiSU_FormatAuthor::Author.new(@author_format.strip).author_details
+        @authors,@authorship=creator[:authors],creator[:authorship]
+        file=if name=~/~[a-z]{2,3}\.ss[mt]$/
+          name.sub(/~[a-z]{2,3}\.ss[mt]$/,'')
+        else
+          name.sub(/\.ss[mt]$/,'')
+        end
+        page=if @env.output_dir_structure.by? == :language
+          "#{lang}/sisu_manifest.html"
+        else
+          "sisu_manifest.#{lang}.html"
+        end
+        idx_array[lang] <<=if @idx_list =~/;/
+          g=@idx_list.scan(/[^;]+/)
+          g.each.map do |i|
+            i=i.strip
+            {
+              filename: filename,
+              file: file,
+              rough_idx: i,
+              title: @fulltitle,
+              author: creator,
+              page: page,
+              lang: lang
+            }
+          end
+        else {
+            filename: filename,
+            file: file,
+            rough_idx: @idx_list,
+            title: @fulltitle,
+            author: creator,
+            page: page,
+            lang: lang,
+          }
+        end
+      else
+        if (@opt.act[:verbose_plus][:set]==:on \
+        || @opt.act[:maintenance][:set]==:on)
+          p "missing required field in #{@filename} - [title]: <#{@title}>; [author]: <#{@author_format}>; [idx]: <#{@idx_list}>"
+        end
+      end
+      idx_array[lang]=idx_array[lang].flatten
+      idx_array
+    end
+  end
+  class Index < Mix
+    def initialize(opt,env,idx_array,the_idx)
+      @opt, @env,@idx_array,@the_idx=
+        opt,env, idx_array, the_idx
+      @@the_idx_topics=@the_idx
+    end
+    def song
+      the_idx=construct_book_topic_keys
+      construct_book_topic_hash(the_idx)
+    end
+    def capital(txt)
+      txt_a=txt.scan(/\S+/)
+      tx=''
+      txt_a.each do |t|
+        tx += t[0].chr.capitalize + t[1,txt.length] + ' '
+      end
+      tx.strip
+    end
+    def capital_(txt)
+      txt[0].chr.capitalize + txt[1,txt.length]
+    end
+    def contents(idx,lang)
+      names=''
+      idx[:author][:last_first_format_a].each do |n|
+        s=n.sub(/(.+?)(?:,.+|$)/,'\1').gsub(/\s+/,'_')
+        names=if @env.output_dir_structure.by? == :language
+          names += %{<a href="authors.html##{s}">#{n}</a>, }
+        else
+          names += %{<a href="authors.#{lang}.html##{s}">#{n}</a>, }
+        end
+      end
+      {
+        filename: idx[:filename],
+        file: idx[:file],
+        author: names,
+        title: idx[:title],
+        page: idx[:page]
+      }
+    end
+    def capital_(txt)
+      txt[0].chr.capitalize + txt[1,txt.length]
+    end
+    def key_create(c,alt)
+      x=nil
+      x=if c.length==6
+        c[0].to_s + '|' +
+          capital(c[1][0].to_s) + '|' +
+          capital(c[2][0].to_s) + '|' +
+          capital(c[3][0].to_s) + '|' +
+          capital(alt.to_s)
+      elsif c.length==5
+        c[0].to_s + '|' +
+          capital(c[1][0].to_s) + '|' +
+          capital(c[2][0].to_s) + '|' +
+          capital(alt.to_s)
+      elsif c.length==4
+        c[0].to_s + '|' +
+          capital(c[1][0].to_s) + '|' +
+          capital(alt.to_s)
+      elsif c.length==3
+        c[0].to_s + '|' +
+          capital(alt.to_s)
+      end
+    end
+    def construct_book_topic_keys
+      idx_array=@idx_array
+      @idx_a=[]
+      @the_a=[]
+      idx_array.each_pair do |lang,idx_arr|
+        @@the_idx_topics[lang] ||= {}
+        idx_arr.each do |idx|
+          if idx[:rough_idx]
+            idx_lst=idx[:rough_idx].scan(/[^:]+/)
+          else
+            puts "no topic register in: << #{idx[:filename]} >>"
+            next
+          end
+          idx_a=[]
+          idx_lst.each do |c|
+            idx_a << c.scan(/[^|\n]+/m)
+          end
+          idx_a << contents(idx,lang)
+          @idx_a << [lang] + idx_a
+        end
+      end
+      @idx_a.each do |c|
+        if c.length > 1 \
+        and c.is_a?(Array)
+          if c[2].is_a?(Hash)
+            c[1].each do |alt|
+              v=key_create(c,alt)
+              @the_a << [v, c[2]] if v
+            end
+          end
+        end
+        if c.length > 2 \
+        and c.is_a?(Array)
+          if c[3].is_a?(Hash)
+            c[2].each do |alt|
+              v=key_create(c,alt)
+              @the_a << [v, c[3]] if v
+            end
+          end
+        end
+        if c.length > 3 \
+        and c.is_a?(Array)
+          if c[4].is_a?(Hash)
+            c[3].each do |alt|
+              v=key_create(c,alt)
+              @the_a << [v, c[4]] if v
+            end
+          end
+        end
+        if c.length > 4 \
+        and c.is_a?(Array)
+          if c[5].is_a?(Hash)
+            c[4].each do |alt|
+              v=key_create(c,alt)
+              @the_a << [v, c[5]] if v
+            end
+          end
+        end
+        if c.length > 5 \
+        and c.is_a?(Array)
+          if c[6].is_a?(Hash)
+            c[5].each do |alt|
+              v=key_create(c,alt)
+              @the_a << [v, c[6]] if v
+            end
+          end
+        end
+      end
+      @the_a.sort_by { |x| x[0] } #; y.each {|z| puts z}
+    end
+    def construct_book_topic_hash(t)
+      @the_h={}
+      t.each do |z|
+        x=z[0].scan(/[^|]+/)
+        depth=x.length
+        extract=(depth-1)
+        k=case extract
+        when 4
+          { x[0] => { x[1] => { x[2] => { x[3] => { x[4] => z[1] } } } } }
+        when 3
+          { x[0] => { x[1] => { x[2] => { x[3] => z[1] } } } }
+        when 2
+          { x[0] => { x[1] => { x[2] => z[1] } } }
+        when 1
+          { x[0] => { x[1] => z[1] } }
+        when 0
+          { x[0] => z[1] }
+        end
+        if extract >= 0
+          k.each_pair do |x0,y0|
+            if extract == 0
+              @the_h[x0] ||={ md: [] }
+              @the_h[x0][:md] << y0
+            else
+              @the_h[x0] ||={}
+            end
+            #puts spaces*0 + x0
+            if extract >= 1
+              y0.each_pair do |x1,y1|
+                if extract == 1
+                  @the_h[x0][x1] ||={ md: [] }
+                  @the_h[x0][x1][:md] << y1
+                else
+                  @the_h[x0][x1] ||={}
+                end
+                #puts spaces*1 + x1
+                if extract >= 2
+                  y1.each_pair do |x2,y2|
+                    if extract == 2
+                      @the_h[x0][x1][x2] ||={ md: [] }
+                      @the_h[x0][x1][x2][:md] << y2
+                    else
+                      @the_h[x0][x1][x2] ||={}
+                    end
+                    #puts spaces*2 + x2
+                    if extract >= 3
+                      y2.each_pair do |x3,y3|
+                        if extract == 3
+                          @the_h[x0][x1][x2][x3] ||={ md: [] }
+                          @the_h[x0][x1][x2][x3][:md] << y3
+                        else
+                          @the_h[x0][x1][x2][x3] ||={}
+                        end
+                        #puts spaces*3 + x3
+                        if extract == 4
+                          y3.each_pair do |x4,y4|
+                            if extract == 4
+                              @the_h[x0][x1][x2][x3][x4] ||={ md: [] }
+                              @the_h[x0][x1][x2][x3][x4][:md] << y4
+                            else
+                              @the_h[x0][x1][x2][x3][x4] ||={}
+                            end
+                            #puts spaces*4 + x4
+                            if extract == 5
+                              y4.each_pair do |x5,y5|
+                                if extract == 5
+                                  @the_h[x0][x1][x2][x3][x4][x5] ||={ md: [] }
+                                  @the_h[x0][x1][x2][x3][x4][x5][:md] << y5
+                                end
+                                #puts spaces*5 + x5
+                              end
+                            end
+                          end
+                        end
+                      end
+                    end
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+      #@the_h.each_pair { |x,y| p x; p y }
+      @the_h
+    end
+    def traverse_base
+      @the_h.each_pair do |x0,y0|
+        puts spaces*0 + x0 if x0.is_a?(String)
+        if y0.is_a?(Hash)
+          y0.each_pair do |x1,y1|
+            puts spaces*1 + x1 if x1.is_a?(String)
+            if y1.is_a?(Hash)
+              y1.each_pair do |x2,y2|
+                puts spaces*2 + x2 if x2.is_a?(String)
+                if y2.is_a?(Hash)
+                  y2.each_pair do |x3,y3|
+                    puts spaces*3 + x3 if x3.is_a?(String)
+                    if y3.is_a?(Hash)
+                      y3.each_pair do |x4,y4|
+                        puts spaces*4 + x4 if x4.is_a?(String)
+                        if y4.is_a?(Hash)
+                          y4.each_pair do |x5,y5|
+                            puts spaces*5 + x5 if x5.is_a?(String)
+                          end
+                        end
+                      end
+                    end
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+    def traverse
+      @the_h.each_pair do |x0,y0|
+        puts spaces*0 + x0 if x0.is_a?(String)
+        if y0.is_a?(Hash)
+          if y0.has_key?(:md)
+            y0[:md].each { |x| puts spaces*5 + x[:title] }
+          end
+          y0.each_pair do |x1,y1|
+            puts spaces*1 + x1 if x1.is_a?(String)
+            if y1.is_a?(Hash)
+              if y1.has_key?(:md)
+                y1[:md].each { |x| puts spaces*5 + x[:title] }
+              end
+              y1.each_pair do |x2,y2|
+                puts spaces*2 + x2 if x2.is_a?(String)
+                if y2.is_a?(Hash)
+                  if y2.has_key?(:md)
+                    y2[:md].each { |x| puts spaces*5 + x[:title] }
+                  end
+                  y2.each_pair do |x3,y3|
+                    puts spaces*3 + x3 if x3.is_a?(String)
+                    if y3.is_a?(Hash)
+                      if y3.has_key?(:md)
+                        y3[:md].each { |x| puts spaces*5 + x[:title] }
+                      end
+                      y3.each_pair do |x4,y4|
+                        puts spaces*4 + x4 if x4.is_a?(String)
+                        if y4.is_a?(Hash)
+                          if y4.has_key?(:md)
+                            y4[:md].each { |x| puts spaces*5 + x[:title] }
+                          end
+                          y4.each_pair do |x5,y5|
+                            puts spaces*5 + x4 if x4.is_a?(String)
+                          end
+                        end
+                      end
+                    end
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+  class OutputIndex < Mix
+    require_relative 'i18n'                               # i18n.rb
+    def initialize(opt,the_idx)
+      @opt,@the_idx=opt,the_idx
+      @env=SiSU_Env::InfoEnv.new
+      @rc=SiSU_Env::GetInit.new.sisu_yaml.rc
+      @alphabet_list=%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]
+      @alph=@alphabet_list.dup
+      @letter=@alph.shift
+    end
+    def html_file_open
+      @the_idx.keys.each do |lng|
+        @output ||={}
+        @output[lng] ||={}
+        harvest_pth,file='',''
+        if @env.output_dir_structure.by? == :language
+          harvest_pth=@env.path.webserv + '/' \
+          + @opt.base_stub + '/' \
+          + lng + '/' \
+          + 'manifest'
+          file=harvest_pth + '/' + 'topics.html'
+        elsif @env.output_dir_structure.by? == :filetype
+          harvest_pth=@env.path.webserv + '/' \
+          + @opt.base_stub + '/' \
+          + 'manifest'
+          file=harvest_pth + '/' + 'topics.' + lng + '.html'
+        elsif @env.output_dir_structure.by? == :filename
+          harvest_pth=@env.path.webserv + '/' \
+          + @opt.base_stub
+          file=harvest_pth + '/' + 'topics.' + lng + '.html'
+        end
+        FileUtils::mkdir_p(harvest_pth) \
+          unless FileTest.directory?(harvest_pth)
+        fileinfo=(@opt.act[:verbose][:set]==:on \
+        || @opt.act[:verbose_plus][:set]==:on \
+        || @opt.act[:urls_selected][:set]==:on \
+        || @opt.act[:maintenance][:set]==:on) \
+        ? ("file://#{file}")
+        : ''
+        SiSU_Screen::Ansi.new(
+          @opt.act[:color_state][:set],
+          "harvest topics(#{@opt.files.length} files)",
+          fileinfo
+        ).dark_grey_title_hi unless @opt.act[:quiet][:set]==:on
+        @output[lng][:html]=File.new(file,'w')
+        if @opt.act[:maintenance][:set]==:on
+          @output[lng][:html_mnt]=File.new("#{@env.path.pwd}/topics.html",'w')
+        end
+      end
+    end
+    def html_file_close
+      @the_idx.keys.each do |lng|
+        @output[lng][:html].close
+        @output[lng][:html_mnt].close if @output[lng][:html_mnt].is_a?(File)
+      end
+    end
+    def html_print
+      def html_songsheet
+        #traverse
+        html_file_open
+        html_head
+        html_alph
+        html_body_traverse
+        html_tail
+        html_file_close
+      end
+      def html_body_traverse
+        @the_idx.each_pair do |x0,y0|
+          lng=x0
+          if x0.is_a?(String)
+            #do_string_name(lng,'lev0',x0)
+            #puts spaces*0 + x0
+          end
+          if y0.is_a?(Hash)
+            if y0.has_key?(:md)
+              y0[:md].each do |x|
+                #do_hash(lng,attrib,x) #lv==0 ?
+                #puts spaces*5 + x[:title]
+              end
+            end
+            y0.each_pair do |x1,y1|
+              if x1.is_a?(String)
+                do_string_name(lng,'lev0',x1)
+                #puts spaces*1 + x1
+              end
+              if y1.is_a?(Hash)
+                if y1.has_key?(:md)
+                  y1[:md].each do |x|
+                    do_hash(lng,0,x)
+                    #puts spaces*5 + x[:title]
+                  end
+                end
+                y1.each_pair do |x2,y2|
+                  if x2.is_a?(String)
+                    do_string(lng,'lev1',x2)
+                    #puts spaces*2 + x2
+                  end
+                  if y2.is_a?(Hash)
+                    if y2.has_key?(:md)
+                      y2[:md].each do |x|
+                        do_hash(lng,1,x)
+                        #puts spaces*5 + x[:title]
+                      end
+                    end
+                    y2.each_pair do |x3,y3|
+                      if x3.is_a?(String)
+                        do_string(lng,'lev2',x3)
+                        #puts spaces*3 + x3
+                      end
+                      if y3.is_a?(Hash)
+                        if y3.has_key?(:md)
+                          y3[:md].each do |x|
+                            do_hash(lng,2,x)
+                            #puts spaces*5 + x[:title]
+                          end
+                        end
+                        y3.each_pair do |x4,y4|
+                          if x4.is_a?(String)
+                            do_string(lng,'lev3',x4)
+                            #puts spaces*4 + x4
+                          end
+                          if y4.is_a?(Hash)
+                            if y4.has_key?(:md)
+                              y4[:md].each do |x|
+                                do_hash(lng,3,x)
+                                #puts spaces*5 + x[:title]
+                              end
+                            end
+                            y4.each_pair do |x5,y5|
+                              if x5.is_a?(String)
+                                do_string(lng,'lev4',x5)
+                                #puts spaces*5 + x5
+                              end
+                            end
+                          end
+                        end
+                      end
+                    end
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+      def html_head_adjust(lng,type='')
+        css_path,authors='',''
+        if @env.output_dir_structure.by? == :language
+          css_path=(type !~/maintenance/) \
+          ? '../../_sisu/css/harvest.css'
+          : 'harvest.css'
+          authors='authors.html'
+        elsif @env.output_dir_structure.by? == :filetype
+          css_path=(type !~/maintenance/) \
+          ? '../_sisu/css/harvest.css'
+          : 'harvest.css'
+          authors="authors.#{lng}.html"
+        elsif @env.output_dir_structure.by? == :filename
+          css_path=(type !~/maintenance/) \
+          ? './_sisu/css/harvest.css'
+          : 'harvest.css'
+          authors="authors.#{lng}.html"
+        end
+        ln=SiSU_i18n::Languages.new.language.list
+        harvest_languages=''
+        @the_idx.keys.each do |lg|
+          if @env.output_dir_structure.by? == :language
+            harvest_pth="../../#{lg}/manifest"
+            file=harvest_pth + '/' + 'topics.html'
+          elsif @env.output_dir_structure.by? == :filetype
+            harvest_pth='.'
+            file=harvest_pth + '/' + 'topics.' + lg + '.html'
+          elsif @env.output_dir_structure.by? == :filename
+            harvest_pth='.'
+            file=harvest_pth + '/topics.' + lg + '.html'
+          end
+          l=ln[lg][:t]
+          harvest_languages +=
+            %{<a href="#{file}">#{l}</a>&nbsp;&nbsp;&nbsp;}
+        end
+        sv=SiSU_Env::InfoVersion.instance.get_version
+        if @env.output_dir_structure.by? == :language
+          home_pth='../..'
+          output_structure_by='(output organised by language &amp; filetype)'
+        elsif @env.output_dir_structure.by? == :filetype
+          home_pth='..'
+          output_structure_by='(output organised by filetype)'
+        elsif @env.output_dir_structure.by? == :filename
+          home_pth='.'
+          output_structure_by='(output organised by filename)'
+        else
+          home_pth='.'
+          output_structure_by='(output organised by ?)'
+        end
+        <<WOK
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>SiSU Metadata Harvest - Topics</title>
+<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
+<meta name="dc.title" content= "SiSU metadata harvest, Topics - SiSU information Structuring Universe, Structured information Serialised Units" />
+<meta name="dc.subject" content= "document structuring, ebook, publishing, PDF, LaTeX, XML, ODF, SQL, postgresql, sqlite, electronic book, electronic publishing, electronic document, electronic citation, data structure, citation systems, granular search, digital library" />
+<meta name="generator" content="#{sv.project} #{sv.version} of #{sv.date_stamp} (n*x and Ruby!)" />
+<link rel="generator" href="http://www.jus.uio.no/sisu/SiSU" />
+<link href="#{css_path}" rel="stylesheet">
+<link rel="shortcut icon" href="../_sisu/image/rb7.ico" />
+</head>
+<body lang="en" xml:lang="en">
+<a name="top" id="top"></a>
+<a name="up" id="up"></a>
+<a name="start" id="start"></a>
+<h1>SiSU Metadata Harvest - Topics #{output_structure_by}</h1>
+<p>[<a href="#{home_pth}/index.html">&nbsp;HOME&nbsp;</a>] also see <a href="#{authors}">SiSU Metadata Harvest - Authors</a></p>
+<p>#{@env.widget_static.search_form}</p>
+<hr />
+<p class="tiny">#{harvest_languages}</p>
+<hr />
+WOK
+      end
+      def html_head
+        @the_idx.keys.each do |lng|
+          @output[lng][:html_mnt] \
+          << html_head_adjust(lng,'maintenance') \
+            if @opt.act[:maintenance][:set]==:on
+          @output[lng][:html] << html_head_adjust(lng)
+        end
+      end
+      def html_alph
+        a=[]
+        a << '<p>'
+        @alph.each do |x|
+          a << ((x =~/[0-9]/) \
+          ? ''
+          : %{<a href="##{x}">#{x}</a>,&nbsp;})
+        end
+        a=a.join
+        @the_idx.keys.each do |lng|
+          @output[lng][:html_mnt] << a \
+            if @opt.act[:maintenance][:set]==:on
+          @output[lng][:html] << a
+        end
+      end
+      def html_tail
+        a =<<WOK
+<hr />
+<a name="bottom" id="bottom"></a>
+<a name="down" id="down"></a>
+<a name="end" id="end"></a>
+<a name="finish" id="finish"></a>
+<a name="stop" id="stop"></a>
+<a name="credits"></a>
+#{SiSU_Proj_HTML::Bits.new.credits_sisu}
+</body>
+</html>
+WOK
+        @the_idx.keys.each do |lng|
+          @output[lng][:html_mnt] << a \
+            if @output[lng][:html_mnt].is_a?(File)
+          @output[lng][:html] << a
+        end
+      end
+      def do_html(lng,html)
+        @output[lng][:html] << html
+      end
+      def do_html_maintenance(lng,html)
+        @output[lng][:html_mnt] << html \
+          if @output[lng][:html_mnt].is_a?(File)
+      end
+      def do_string(lng,attrib,string)
+        html=%{<p class="#{attrib}">#{string}</p>}
+        do_html(lng,html)
+        do_html_maintenance(lng,html) \
+          if @output[lng][:html_mnt].is_a?(File)
+      end
+      def do_string_default(lng,attrib,string)
+        html=%{<p class="#{attrib}">#{string}</p>}
+        do_html(lng,html)
+      end
+      def do_string_maintenance(lng,attrib,string)
+        html=%{<p class="#{attrib}">#{string}</p>}
+        do_html_maintenance(lng,html) \
+          if @output[lng][:html_mnt].is_a?(File)
+      end
+      def do_string_name(lng,attrib,string)
+        f=/^(\S)/.match(string)[1]
+        if @lng != lng
+          @alph=@alphabet_list.dup
+          @letter=@alph.shift
+          @lng = lng
+        end
+        if @letter < f
+          while @letter < f
+            if @alph.length > 0
+              @letter=@alph.shift
+              if @output[lng][:html_mnt].is_a?(File)
+                @output[lng][:html_mnt] \
+                << %{\n<p class="letter"><a name="#{@letter}">#{@letter}</a></p><p class="book_index_lev1"><a name="#{@letter.downcase}"></a></p>}
+              end
+              @output[lng][:html] \
+              << %{\n<p class="letter"><a name="#{@letter}">#{@letter}</a></p><p class="book_index_lev1"><a name="#{@letter.downcase}"></a></p>}
+            else break
+            end
+          end
+        end
+        name=string.strip.gsub(/\s+/,'_')
+        html=%{<p class="#{attrib}"><a name="#{name}">#{string}</a></p>}
+        do_html(lng,html)
+        do_html_maintenance(lng,html) \
+          if @output[lng][:html_mnt].is_a?(File)
+      end
+      def do_array(lng,lv,array)
+        lv+=1
+        array.each do |b|
+          do_case(lng,lv,b)
+        end
+      end
+      def do_hash_md(lng,attrib,hash)
+        lang_code_insert=SiSU_Env::FilenameLanguageCodeInsert.new(@opt,lng).language_code_insert
+        manifest_at=if @env.output_dir_structure.by? == :language
+          hash[:file] + Sfx[:html]
+        elsif @env.output_dir_structure.by? == :filetype
+          hash[:file] + lang_code_insert +  Sfx[:html]
+        elsif @env.output_dir_structure.by? == :filename
+          "./#{hash[:file]}/#{hash[:page]}"
+        else '' #error
+        end
+        html=%{<a href="#{manifest_at}">#{hash[:title]}</a> - #{hash[:author]}}
+        do_string_default(lng,attrib,html)
+      end
+      def do_hash_md_maintenance(lng,attrib,hash)
+        if @output[lng][:html_mnt].is_a?(File) #should not be run for presentation output
+          html=%{[<a href="#{hash[:file]}.sst">src</a>]&nbsp;&nbsp;<a href="file://#{@env.path.output}/#{hash[:file]}/#{hash[:page]}">#{hash[:title]}</a> - #{hash[:author]}}
+          do_string_maintenance(lng,attrib,html)
+        end
+      end
+      def do_hash(lng,lv,hash)
+        lv+=1
+        key=[]
+        hash.each_key do |m|
+          if m == :md
+            do_case(lng,lv,hash[m])
+          elsif m != :title \
+          and m != :author \
+          and m != :filename \
+          and m != :file \
+          and m != :rough_idx \
+          and m != :page
+            key << m
+          elsif m == :title
+            do_hash_md(lng,'work',hash)
+            do_hash_md_maintenance(lng,'work',hash)
+          end
+        end
+        if key.length > 0
+          key.sort.each do |m|
+            attrib="lev#{lv}"
+            lv==0 ? do_string_name(lng,attrib,m) : do_string(lng,attrib,m)
+            do_case(lng,lv,hash[m])
+          end
+        end
+      end
+      def do_case(lng,lv,a)
+        case a
+        when String
+          attrib="lev#{lv}"
+          if a=~/S/
+            lv==0 ? do_string_name(lng,attrib,a) : do_string(lng,attrib,a)
+          end
+        when Array
+          do_array(lng,lv,a)
+        when Hash
+          do_hash(lng,lv,a)
+        end
+      end
+      #def html_body
+      #  the_idx=@the_idx
+      #  the_idx.each_pair do |lng,lng_array|
+      #    lng_array.sort.each do |a|
+      #      do_case(lng,-1,a)
+      #    end
+      #  end
+      #end
+      self
+    end
+  end
+end
+__END__
+terms -|_  t{tl1} -|_ {fa}[fa]{filenames and other details}
+       |           |_ {tl2} -|_ {fa}[fa]{filenames and other details}
+       |           |         |_{tl3} -|_ {fa}[fa]{filenames and other details}
+       |           |         |        |_{tl4} - {fa}[fa]{filenames and other details}
+       |           |         |        |
+       |           |         |        |_{tl4a} - {fa}[fa]{filenames and other details}
+       |           |         |        |
+       |           |         |        |_{tl4b} - {fa}[fa]{filenames and other details}
+       |           |         |        |
+       |           |         |        |_ ...
+       |           |         |
+       |           |         |_{tl3a} - {fa}[fa]{filenames and other details}
+       |           |
+       |           |_{tl2a} - {fa}[fa]{filenames and other details}
+       |
+       |_ t{tl1a} -|_ {fa}[fa]{filenames and other details}
+                   |_ ...
+#+END_SRC
+
+** authors
+*** html_harvest_authors.rb
+
+#+BEGIN_SRC ruby  :tangle "../lib/sisu/html_harvest_authors.rb"
+# <<sisu_document_header>>
+module SiSU_HarvestAuthors
+  require_relative 'html_harvest_author_format'          # html_harvest_author_format.rb
+  require_relative 'html_parts'                          # html_parts.rb
+  class Songsheet
+    @@the_idx_authors={}
+    def initialize(opt,env)
+      @opt,@env=opt,env
+      @file_list=opt.files
+    end
+    def songsheet
+      idx_array={}
+      @opt.f_pths.each do |y|
+        lang_hash_file_array={}
+        name=y[:f]
+        filename=y[:pth] + '/' + y[:f]
+        File.open(filename,'r') do |file|
+          file.each_line("\n\n") do |line|
+            if line =~/^@(?:title|creator|date):(?:\s|$)/m
+              lang_hash_file_array[y[:lng_is]] ||= []
+              lang_hash_file_array[y[:lng_is]] << line
+            elsif line =~/^@\S+?:(?:\s|$)/m \
+            or line =~/^(?:\s*\n|%+ )/
+            else break
+            end
+          end
+        end
+        lang_hash_file_array.each_pair do |lang,a|
+          idx_array[lang] ||= []
+          idx_array=SiSU_HarvestAuthors::Harvest.new(
+            @opt,
+            @env,
+            a,
+            filename,
+            name,
+            idx_array,
+            lang
+          ).extract_harvest
+        end
+      end
+      the_idx=SiSU_HarvestAuthors::Index.new(
+        idx_array,
+        @@the_idx_authors
+      ).construct_book_author_index
+      SiSU_HarvestAuthors::OutputIndex.new(
+        @opt,
+        the_idx
+      ).html_print.html_songsheet
+    end
+  end
+  class Harvest
+    def initialize(opt,env,data,filename,name,idx_array,lang)
+      @opt, @env,@data,@filename,@name,@idx_array,@lang=
+        opt,env, data, filename, name, idx_array, lang
+    end
+    def extract_harvest
+      data,   filename, name, idx_array, lang =
+        @data,@filename,@name,@idx_array,@lang
+      @title=@subtitle=@fulltitle=@author=@author_format=@date=nil
+      @authors=[]
+      rgx={}
+      rgx[:author]=/^@creator:(?:[ ]+|.+?:author:[ ]+)(.+?)(?:\||\n)/m
+      rgx[:title]=/^@title:[ ]+(.+)/
+      rgx[:subtitle]=/^@title:.+?:subtitle:[ ]+(.+?)\n/m
+      rgx[:date]=/^@date:(?:[ ]+|.+?:published:[ ]+)(\d{4})/m
+      data.each do |para|
+        if para=~ rgx[:title]
+          @title=rgx[:title].match(para)[1]
+        end
+        if para=~ rgx[:subtitle]
+          @subtitle=rgx[:subtitle].match(para)[1]
+        end
+        if para=~ rgx[:author]
+          @author_format=rgx[:author].match(para)[1]
+        end
+        if para=~ rgx[:date]
+          @date=rgx[:date].match(para)[1]
+        end
+        break if @title && @subtitle && @author && @date
+      end
+      @fulltitle=@subtitle \
+      ? (@title + ' - ' + @subtitle)
+      : @title
+      if @title \
+      and @author_format
+        creator=SiSU_FormatAuthor::Author.new(@author_format.strip).author_details
+        @authors,@authorship=creator[:authors],creator[:authorship]
+        file=if name=~/~[a-z]{2,3}\.ss[mt]$/
+          name.sub(/~[a-z]{2,3}\.ss[mt]$/,'')
+        else
+          name.sub(/\.ss[mt]$/,'')
+        end
+        page=if @env.output_dir_structure.by? == :language
+          "#{lang}/sisu_manifest.html"
+        else
+          "sisu_manifest.#{lang}.html"
+        end
+        idx_array[lang] <<= {
+          filename: filename,
+          file: file,
+          date: @date,
+          title: @fulltitle,
+          author: creator,
+          page: page,
+          lang: lang
+        }
+      else
+        #p "missing author field: #{@filename} title: #{@title}; author: #{@author_format}"
+      end
+      idx_array[lang]=idx_array[lang].flatten
+      idx_array
+    end
+  end
+  class Index
+    def initialize(idx_array,the_idx)
+      @idx_array,@the_idx=idx_array,the_idx
+      @@the_idx_authors=@the_idx
+    end
+    def capital(txt)
+      txt[0].chr.capitalize + txt[1,txt.length]
+    end
+    def construct_book_author_index
+      idx_array=@idx_array
+      idx_array.each_pair do |lang,idx_arr|
+        @@the_idx_authors[lang] ||= {}
+        idx_arr.each do |idx|
+          idx[:author][:last_first_format_a].each do |author|
+            author=author.strip
+            if @@the_idx_authors[lang][author].is_a?(NilClass)
+              @@the_idx_authors[lang][author]={ md: [] }
+            end
+            @@the_idx_authors[lang][author][:md] << {
+              filename: idx[:filename],
+              file: idx[:file],
+              author: idx[:author],
+              title: idx[:title],
+              date: idx[:date],
+              page: idx[:page],
+              lang: idx[:lang]
+            }
+          end
+        end
+      end
+      @the_idx=@@the_idx_authors
+    end
+  end
+  class OutputIndex
+    require_relative 'i18n'                               # i18n.rb
+    def initialize(opt,the_idx)
+      @opt,@the_idx=opt,the_idx
+      @env=SiSU_Env::InfoEnv.new
+      @rc=SiSU_Env::GetInit.new.sisu_yaml.rc
+      @alphabet_list=%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]
+      @alph=@alphabet_list.dup
+      @letter=@alph.shift
+    end
+    def html_file_open
+      @the_idx.keys.each do |lng|
+        @output ||={}
+        @output[lng] ||={}
+        harvest_pth,file='',''
+        if @env.output_dir_structure.by? == :language
+          harvest_pth=@env.path.webserv + '/' \
+          + @opt.base_stub + '/' \
+          + lng + '/' \
+          + 'manifest'
+          file="#{harvest_pth}/authors.html"
+        elsif @env.output_dir_structure.by? == :filetype
+          harvest_pth=@env.path.webserv + '/' \
+          + @opt.base_stub + '/' \
+          + 'manifest'
+          file="#{harvest_pth}/authors.#{lng}.html"
+        elsif @env.output_dir_structure.by? == :filename
+          harvest_pth=@env.path.webserv + '/' \
+          + @opt.base_stub
+          file="#{harvest_pth}/authors.#{lng}.html"
+        end
+        FileUtils::mkdir_p(harvest_pth) \
+          unless FileTest.directory?(harvest_pth)
+        fileinfo=(@opt.act[:verbose][:set]==:on \
+        || @opt.act[:verbose_plus][:set]==:on \
+        || @opt.act[:urls_selected][:set]==:on \
+        || @opt.act[:maintenance][:set]==:on) \
+        ? ("file://#{file}") : ''
+        SiSU_Screen::Ansi.new(
+          @opt.act[:color_state][:set],
+          "harvest authors (#{@opt.files.length} files)",
+          fileinfo
+        ).dark_grey_title_hi unless @opt.act[:quiet][:set]==:on
+        @output[lng][:html]=File.new(file,'w')
+      end
+    end
+    def html_file_close
+      @the_idx.keys.each do |lng|
+        @output[lng][:html].close
+        @output[lng][:html_mnt].close \
+          if @output[lng][:html_mnt].is_a?(File)
+      end
+    end
+    def html_print
+      def html_songsheet
+        html_file_open
+        html_head
+        html_alph
+        html_body
+        html_tail
+        html_file_close
+      end
+      def html_head_adjust(lng,type='')
+        css_path,topics='',''
+        if @env.output_dir_structure.by? == :language
+          css_path=(type !~/maintenance/) \
+          ? '../../_sisu/css/harvest.css'
+          : 'harvest.css'
+          topics='topics.html'
+        elsif @env.output_dir_structure.by? == :filetype
+          css_path=(type !~/maintenance/) \
+          ? '../_sisu/css/harvest.css'
+          : 'harvest.css'
+          topics="topics.#{lng}.html"
+        elsif @env.output_dir_structure.by? == :filename
+          css_path=(type !~/maintenance/) \
+          ? './_sisu/css/harvest.css'
+          : 'harvest.css'
+          topics="topics.#{lng}.html"
+        end
+        ln=SiSU_i18n::Languages.new.language.list
+        harvest_languages=''
+        @the_idx.keys.each do |lg|
+          if @env.output_dir_structure.by? == :language
+            harvest_pth="../../#{lg}/manifest"
+            file="#{harvest_pth}/authors.html"
+          elsif @env.output_dir_structure.by? == :filetype
+            harvest_pth='.'
+            file="#{harvest_pth}/authors.#{lg}.html"
+          elsif @env.output_dir_structure.by? == :filename
+            harvest_pth='.'
+            file="#{harvest_pth}/authors.#{lg}.html"
+          end
+          l=ln[lg][:t]
+          harvest_languages +=
+            %{<a href="#{file}">#{l}</a>&nbsp;&nbsp;&nbsp;}
+        end
+        sv=SiSU_Env::InfoVersion.instance.get_version
+        if @env.output_dir_structure.by? == :language
+          home_pth='../..'
+          output_structure_by=
+            '(output organised by language &amp; filetype)'
+        elsif @env.output_dir_structure.by? == :filetype
+          home_pth='..'
+          output_structure_by=
+            '(output organised by filetype)'
+        elsif @env.output_dir_structure.by? == :filename
+          home_pth='.'
+          output_structure_by=
+            '(output organised by filename)'
+        else
+          home_pth='.'
+          output_structure_by='(output organised by ?)'
+        end
+        <<WOK
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>SiSU Metadata Harvest - Authors</title>
+<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
+<meta name="dc.title" content= "SiSU metadata harvest, Authors - SiSU information Structuring Universe, Structured information Serialised Units" />
+<meta name="dc.subject" content= "document structuring, ebook, publishing, PDF, LaTeX, XML, ODF, SQL, postgresql, sqlite, electronic book, electronic publishing, electronic document, electronic citation, data structure, citation systems, granular search, digital library" />
+<meta name="generator" content="#{sv.project} #{sv.version} of #{sv.date_stamp} (n*x and Ruby!)" />
+<link rel="generator" href="http://www.jus.uio.no/sisu/SiSU" />
+<link href="#{css_path}" rel="stylesheet" >
+<link rel="shortcut icon" href="../_sisu/image/rb7.ico" />
+</head>
+<body lang="en" xml:lang="en">
+<a name="top" id="top"></a>
+<a name="up" id="up"></a>
+<a name="start" id="start"></a>
+<h1>SiSU Metadata Harvest - Authors #{output_structure_by}</h1>
+<p>[<a href="#{home_pth}/index.html">&nbsp;HOME&nbsp;</a>] also see <a href="#{topics}">SiSU Metadata Harvest - Topics</a></p>
+<p>#{@env.widget_static.search_form}</p>
+<hr />
+<p class="tiny">#{harvest_languages}</p>
+<hr />
+WOK
+      end
+      def html_head
+        @the_idx.keys.each do |lng|
+          @output[lng][:html_mnt] \
+          << html_head_adjust(lng,'maintenance') \
+            if @opt.act[:maintenance][:set]==:on
+          @output[lng][:html] \
+          << html_head_adjust(lng)
+        end
+      end
+      def html_alph
+        a=[]
+        a << '<p>'
+        @alph.each do |x|
+          a << ((x =~/[0-9]/) \
+          ? ''
+          : %{<a href="##{x}">#{x}</a>,&nbsp;})
+        end
+        a=a.join
+        @the_idx.keys.each do |lng|
+          @output[lng][:html_mnt] << a \
+            if @opt.act[:maintenance][:set]==:on
+          @output[lng][:html] << a
+        end
+      end
+      def html_tail
+        a =<<WOK
+<hr />
+<a name="bottom" id="bottom"></a>
+<a name="down" id="down"></a>
+<a name="end" id="end"></a>
+<a name="finish" id="finish"></a>
+<a name="stop" id="stop"></a>
+<a name="credits"></a>
+#{SiSU_Proj_HTML::Bits.new.credits_sisu}
+</body>
+</html>
+WOK
+        @the_idx.keys.each do |lng|
+          @output[lng][:html_mnt] << a \
+            if @output[lng][:html_mnt].is_a?(File)
+          @output[lng][:html] << a
+        end
+      end
+      def do_html(lng,html)
+        @output[lng][:html_mnt] << html \
+          if @output[lng][:html_mnt].is_a?(File)
+        @output[lng][:html] << html
+      end
+      def do_string_name(lng,attrib,string)
+        f=/^(\S)/.match(string[0])[1]
+        if @lng != lng
+          @alph=@alphabet_list.dup
+          @letter=@alph.shift
+          @lng = lng
+        end
+        if @letter < f
+          while @letter < f
+            if @alph.length > 0
+              @letter=@alph.shift
+              if @output[lng][:html_mnt].is_a?(File)
+                @output[lng][:html_mnt] \
+                << %{\n<p class="letter"><a name="#{@letter}"></p>#{@letter}</a><p class="book_index_lev1"><a name="#{@letter.downcase}"></a></p>}
+              end
+              @output[lng][:html] \
+              << %{\n<p class="letter"><a name="#{@letter}">#{@letter}</a></p><p class="book_index_lev1"><a name="#{@letter.downcase}"></a></p>}
+            else break
+            end
+          end
+        end
+      end
+      def html_body
+        the_idx=@the_idx
+        the_idx.each_pair do |lng,lng_array|
+          lng_array.sort.each do |a|
+            do_string_name(lng,'',a)
+            name=a[0].sub(/(.+?)(?:,.+|$)/,'\1').gsub(/\s+/,'_')
+            x = %{<p class="author"><a name="#{name}">#{a[0]}</a></p>}
+            if @output[lng][:html_mnt].is_a?(File)
+              @output[lng][:html_mnt] << x
+            end
+            @output[lng][:html] << x
+            lang_code_insert=SiSU_Env::FilenameLanguageCodeInsert.new(@opt,lng).language_code_insert
+            works=[]
+            a[1][:md].each do |i|
+              manifest_at=if @env.output_dir_structure.by? == :language
+                i[:file] + Sfx[:html]
+              elsif @env.output_dir_structure.by? == :filetype
+                i[:file] + lang_code_insert + Sfx[:html]
+              elsif @env.output_dir_structure.by? == :filename
+                './' + i[:file] + '/' + i[:page]
+              else '' #error
+              end
+              work=[
+                "#{i[:date]} #{i[:title]}",
+                %{<p class="publication">#{i[:date]} <a href="#{manifest_at}">#{i[:title]}</a>, #{i[:author][:authors_s]}</p>}
+              ]
+              works<<=(@output[lng][:html_mnt].is_a?(File)) \
+              ? (work.concat([%{<p class="publication">[<a href="#{i[:file]}.sst">src</a>]&nbsp;&nbsp;#{i[:date]} <a href="file://#{manifest_at}">#{i[:title]}</a>, #{i[:author][:authors_s]} -- [<a href="#{i[:file]}.sst">#{i[:file]}.sst</a>]</p>}]))
+              : work
+            end
+            works.sort_by {|y| y[0]}.each do |z|
+              @output[lng][:html] << z[1]
+              @output[lng][:html_mnt] << z[2] \
+                if @output[lng][:html_mnt].is_a?(File)
+            end
+          end
+        end
+      end
+      self
+    end
+    def screen_print
+      def cycle
+        the_idx=@the_idx
+        the_idx.sort.each do |a|
+          puts a[0]
+          a[1][:md].each do |x|
+            puts "\t" + x[:file]
+          end
+        end
+      end
+      self
+    end
+  end
+end
+__END__
+#+END_SRC
+
+*** html_harvest_author_format.rb
+
+#+BEGIN_SRC ruby  :tangle "../lib/sisu/html_harvest_author_format.rb"
+# <<sisu_document_header>>
+module SiSU_FormatAuthor
+  class Author
+    def initialize(author_param)
+      @author_param=author_param
+    end
+    def author_details
+      @authors,@author_array=[],[]
+      authors=@author_param.scan(/[^;]+/)
+      authors.each do |a|
+        a=a.strip
+        if a =~/"(.+?)"/
+          @authors << { the: $1 }
+          @author_array << $1.upcase
+        else #if a =~/,/
+          x=a.scan(/[^,]+/)
+          x[0]=x[0].strip
+          x[1]=x[1].strip if x[1]
+          if x.length==1
+            @authors << { the: x[0] }
+            @author_array << x[0].upcase
+          elsif x.length==2
+            @authors << { the: x[0], others: x[1] }
+            @author_array << "#{x[0].upcase}, #{x[1]}"
+          else #p x.length
+          end
+        end
+      end
+      l = @authors.length
+      authors_string=''
+      @authors.each_with_index do |a,i|
+        authors_string += if a[:others]
+          if (l - i) > 1
+            "#{a[:others]} #{a[:the]}, "
+          else
+            "#{a[:others]} #{a[:the]}"
+          end
+        else
+          if (l - i) > 2
+            "#{a[:the]}, "
+          else
+            "#{a[:the]}"
+          end
+        end
+      end
+      {
+        last_first_a: authors,
+        last_first_format_a: @author_array,
+        authors_h: @authors,
+        authors_s: authors_string,
+        authors_param: @author_param
+      }
+    end
+  end
+end
+__END__
+#+END_SRC
+
+* document header
+
+#+NAME: sisu_document_header
+#+BEGIN_SRC text
+encoding: utf-8
+- Name: SiSU
+
+  - Description: documents, structuring, processing, publishing, search
+    harvest
+
+  - Author: Ralph Amissah
+    <ralph.amissah@gmail.com>
+
+  - Copyright: (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
+    2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2019,
+    2020, 2021, 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
+
+  - Homepages:
+    <http://www.sisudoc.org>
+
+  - Git
+    <https://git.sisudoc.org/projects/>
+    <https://git.sisudoc.org/projects/?p=software/sisu.git;a=summary>
+    <https://git.sisudoc.org/projects/?p=markup/sisu-markup-samples.git;a=summary>
+#+END_SRC