#encoding: utf-8
#- Name: SiSU
#
#  - Description: documents, structuring, processing, publishing, search
#    src
#
#  - 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>
module SiSU_Po4a
  require_relative 'ao'                                 # ao.rb
  require_relative 'se'                                 # se.rb
    include SiSU_Env
  require_relative 'ao_composite'                       # ao_composite.rb
  require_relative 'shared_metadata'                    # shared_metadata.rb
  require_relative 'src_po4a_shelf_set'                 # src_po4a_shelf_set.rb
  include SiSU_Param
  require_relative 'object_munge'                       # object_munge.rb
  require_relative 'utils_composite'                    # utils_composite.rb
  class Source
    include SiSU_Object_Munge
    @@opt_src,@@opt_trn,@@opt_src_,@@opt_trn_,@@md_src,@@md_trn=
          nil,      nil,       nil,       nil,     nil,     nil
    @@auto_translation_ = :go
    def initialize(opt,fn=nil)
      @opt,@fn=opt,fn
      #unless @opt.fns =~/(.+?\.(?:-|ssm\.)?sst)$/
      #  puts "#{@opt.fns} not a processed file type"
      #end
      file_arr=SiSU_Info_Env::InfoEnv.new.source_file_processing_array(@opt.fns)
      SiSU_Param::Parameters::Instructions.new(file_arr,@opt).extract
      r=Px[:lng_lst_rgx].gsub(/\|en\|/,'|')
      @lang_regx=%r{(?:#{r})}
      if opt.fns =~/\S+?~#{@lang_regx}\.ss[mti]/ \
      and opt.f_pth[:lng]!=@opt.lng_base
        @@opt_src_=false
        @@opt_trn=opt
        @@md_trn=SiSU_Param::Parameters.new(opt).get
      else
        @@opt_src_=true
        @@opt_src=opt
        @@md_src=SiSU_Param::Parameters.new(opt).get
      end
    end
    def wrap_width_set(md,env)
      if defined? md.make.plaintext_wrap \
      and md.make.plaintext_wrap
        md.make.plaintext_wrap
      elsif defined? env.plaintext_wrap \
      and env.plaintext_wrap
        env.plaintext_wrap
      else 78
      end
    end
    def process_file(md,env,file,wrap_width,fn)
      unless @opt.act[:quiet][:set]==:on
        tool=(@opt.act[:verbose][:set]==:on \
        || @opt.act[:verbose_plus][:set]==:on \
        || @opt.act[:maintenance][:set]==:on) \
        ? "#{env.program.text_editor} #{file.output_path.pot.dir}/"
        : @opt.fns
        (@opt.act[:verbose][:set]==:on \
        || @opt.act[:verbose_plus][:set]==:on \
        || @opt.act[:maintenance][:set]==:on) \
        ? SiSU_Screen::Ansi.new(
            @opt.act[:color_state][:set],
            'Pot po4a',
            tool
          ).green_hi_blue
        : SiSU_Screen::Ansi.new(
            @opt.act[:color_state][:set],
            'Pot po4a',
            tool
          ).green_title_hi
        if (@opt.act[:verbose][:set]==:on \
        || @opt.act[:verbose_plus][:set]==:on \
        || @opt.act[:maintenance][:set]==:on)
          SiSU_Screen::Ansi.new(
            @opt.act[:color_state][:set],
            @opt.fns,
            file.output_path.pot.dir
          ).flow
        end
      end
      if @opt.fns =~/\S+?~#{@lang_regx}\.ss[mti]/ \
      or @opt.f_pth[:lng] !=@opt.lng_base
        opt_lang_trn_fn=fn
        @ao_arr_lang_trans=
          SiSU_AO::Source.new(@opt,opt_lang_trn_fn,:po4a).get # ao file drawn here
        opt_lang_src_fn=(fn =~/\S+?~\S{2}(?:_\S{2})?\.ss[mti]/) \
        ? (fn.gsub(/(\S+?)~\S{2}(?:_\S{2})?(\.ss[mti])/,'\1\2')) #check i
        : fn
        transdir,srcdir=Dir.pwd,Dir.pwd
        if Dir.pwd.to_s =~/\/#{@lang_regx}$/
          transdir=Dir.pwd
          srcdir=transdir.
            gsub(/\/#{@lang_regx}$/,
              "/#{@opt.lng_base}")
          if FileTest.directory?(srcdir)
            Dir.chdir(srcdir)
          end
        else nil
        end
        if FileTest.file?("#{srcdir}/#{opt_lang_src_fn}")
          @ao_arr_lang_src=
            SiSU_AO::Source.new(
              @@opt_src,
              opt_lang_src_fn,
              :po4a
            ).get # ao file drawn here
        else
          puts "no identified source document"
          exit
        end
        Dir.chdir(transdir) if transdir
      else
        @ao_arr_lang_src=
          SiSU_AO::Source.new(
            @opt,
            fn,
            :po4a
          ).get # ao file drawn here
        @ao_arr_lang_trans=nil
      end
      SiSU_Po4a::Source::Scroll.new(
        fn,
        @ao_arr_lang_src,
        @ao_arr_lang_trans,
        @@md_src,
        @@md_trn,
        wrap_width
      ).songsheet
    end
    def read
      begin
        src={}
        src[:pth]=@opt.f_pth[:pth]
        src[:files]=if @opt.fns =~ /\.(?:(?:-|ssm\.)sst|ssm)$/
          @opt.fns=@opt.fns.gsub(/\.ssm\.sst$/,'.ssm')
          SiSU_Assemble::CompositeFileList.new(@opt).read
        else
          [@opt.fns]
        end
        md=SiSU_Param::Parameters.new(@opt).get
        env=SiSU_Env::InfoEnv.new(@opt.fns)
        file=SiSU_Env::FileOp.new(md)
        Po4aCfg.new(@opt,file).po4a_cfg
        wrap_width=wrap_width_set(md,env)
        src[:files].each do |fn|
          process_file(md,env,file,wrap_width,fn)
        end
      rescue
        SiSU_Errors::Rescued.new($!,$@,@opt.selections.str,@opt.fns).location do
          __LINE__.to_s + ':' + __FILE__
        end
      ensure
      end
    end
    private
    class Scroll <Source
      include SiSU_Po4aUtils
      @@endnotes={ para: [], end: [] }
      def initialize(fn,data_src,data_trn,md_src,md_trn,wrap_width)
        @fn,@data_src,@data_trn,@md_src,@md_trn,@wrap_width=
         fn, data_src, data_trn, md_src, md_trn, wrap_width
        @md=(md_trn.nil?) \
        ? md_src
        : md_trn
        @tab="\t"
        @@endnotes_=(@md.opt.selections.str =~/--endnote/) \
        ? true
        : false    # --footnote
        @pot={
          body: [],
          open: [],
          close: [],
          head: [],
          metadata: [],
          tail: []
        }
      end
      def br
        (@md.opt.selections.str =~/--dos/) ? "\r\n" : "\n"  # --unix
      end
      def songsheet
        fn=@fn
        pot=pot_markup(@data_src,@data_trn)
        publish(fn,pot)
      end
      def pot_structure_wrap(desc,orig,trans,indent=0,hang=0)
        SiSU_Po4aUtils::Wrap.new(
          @md,
          orig,
          trans,
          desc,
          @wrap_width,
          indent,
          hang
        )
      end
      def wrap_endnotes(orig_notes='',trn_notes='')
        nt=@@endnotes_ ? 'endnote' : 'footnote'
        @fn=0
        a_l=orig_notes.length
        0.upto(a_l-1) do |i|
          @fn=if orig_notes[i].to_s =~/^\^~([\d*+]+)/ # provides endnote number within paragraph
            @fn += 1
          else @fn
          end
          d="#{nt} #{@fn}"
          mark="^~ "
          instruct=s_mark=''
          if @md.opt.act[:maintenance][:set]==:on
            instruct=%{\n# footnotes, the preferred sisu markup for a footnote is~{this is a footnote}~ } \
            + %{however, for translation a footnote reference marker in the text~^ } \
            + %{with a set of notes following the paragraph starting on a newline with "^~ this is a footnote", } \
            + %{is easier to deal with, if possible these should be converted back to~{inline notes}~}
            s_mark="\n# " + %{"\\n\\n#{mark}...\\n\\n"}
          end
          desc="#{d}#{s_mark}#{instruct}"
          orig=(orig_notes[i].to_s =~/^\^~[\d*+]+/) \
          ? (orig_notes[i].to_s.gsub(/^\^~[\d*+]+/,'^~'))
          : orig_notes[i].to_s
          trans=if trn_notes.is_a?(Array) \
          and trn_notes.length==orig_notes.length
            (trn_notes[i].to_s =~/^\^~[\d*+]+/) \
            ? (trn_notes[i].to_s.gsub(/^\^~[\d*+]+/,'^~'))
            : trn_notes[i].to_s
          else ''
          end
          util=pot_structure_wrap(desc,orig,trans)
          wrap=util.line_wrap
          wrap=if wrap =~ /^\s*\^~[\d*+]+\s+.+?\s*\Z/m
            wrap.gsub(/^\s*(\^~[\d*+]+)\s+(.+?)\s*\Z/m, <<GSUB
\\1 \\2
GSUB
                      )
          else
            wrap.gsub(/^(.+)\Z/m, <<GSUB
\\1
GSUB
                      )
          end
          @@endnotes[:para] << wrap
          @@endnotes[:end] << '' << wrap
        end
        @@endnotes[:para].each {|e| @pot[:body] << e << br}
        @@endnotes[:para]=[]
        @@endnotes
      end
      def pot_metadata_src
        @po4a_identify_type='type: SiSU doc' #'type: Plain text'
        meta_src=SiSU_Metadata::Summary.new(@md_src)
        w=[]
        w << [
          "#. #{@po4a_identify_type} - metadata: title",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.metadata_tags.title.main,
          meta_src.metadata_tags.title.sub,
          meta_src.metadata_tags.title.edition,
          meta_src.metadata_tags.title.note,
          meta_src.metadata_tags.title.short,
          meta_src.metadata_tags.title.language,
          meta_src.metadata_tags.title.language_char,
          'msgstr ""',
        ]
        w << [
          "#. #{@po4a_identify_type} - metadata: creator",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.metadata_tags.creator.head,
          meta_src.metadata_tags.creator.author,
          meta_src.metadata_tags.creator.contributor,
          meta_src.metadata_tags.creator.illustrator,
          meta_src.metadata_tags.creator.photographer,
          meta_src.metadata_tags.creator.translator,
          meta_src.metadata_tags.creator.audio,
          meta_src.metadata_tags.creator.digitized_by,
          meta_src.metadata_tags.creator.prepared_by,
          'msgstr ""',
        ]
        w << [
          "#. #{@po4a_identify_type} - metadata: rights",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.metadata_tags.rights.head,
          meta_src.metadata_tags.rights.copyright.text,
          meta_src.metadata_tags.rights.copyright.translation,
          meta_src.metadata_tags.rights.copyright.illustrations,
          meta_src.metadata_tags.rights.copyright.photographs,
          meta_src.metadata_tags.rights.copyright.digitization,
          meta_src.metadata_tags.rights.copyright.audio,
          meta_src.metadata_tags.rights.license,
          'msgstr ""',
        ]
        w << [
          "#. #{@po4a_identify_type} - metadata: classify",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.metadata_tags.classify.head,
          meta_src.metadata_tags.classify.subject,
          meta_src.metadata_tags.classify.topic_register,
          meta_src.metadata_tags.classify.loc,
          meta_src.metadata_tags.classify.dewey,
          #meta_src.metadata_tags.notes.relation,
          #meta_src.metadata_tags.notes.type,
          #meta_src.metadata_tags.identifier.oclc,
          #meta_src.metadata_tags.identifier.isbn,
          'msgstr ""',
        ]
        w << [
          "#. #{@po4a_identify_type} - metadata: date",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.metadata_tags.date.head,
          meta_src.metadata_tags.date.added_to_site,
          meta_src.metadata_tags.date.available,
          meta_src.metadata_tags.date.created,
          meta_src.metadata_tags.date.issued,
          meta_src.metadata_tags.date.modified,
          meta_src.metadata_tags.date.published,
          meta_src.metadata_tags.date.valid,
          'msgstr ""',
        ]
        w << [
          "#. #{@po4a_identify_type} - processing, make instruction",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.processing_tags.make.language,
          meta_src.processing_tags.make.headings,
          meta_src.processing_tags.make.num_top,
          meta_src.processing_tags.make.breaks,
          meta_src.processing_tags.make.emphasis,
          meta_src.processing_tags.make.bold,
          meta_src.processing_tags.make.italics,
          meta_src.processing_tags.make.texpdf_font,
          'msgstr ""',
        ]
        w.each do |y|
          z=''
          y.each do |x|
            if x
              z += x + "\n" if x =~/^#|^msg(?:id|str)/
              z += %{"#{x}"\n} if x =~/^@\S+?:(?: |$)/
              z += %{"#{x}"\n} if x =~/^\s+:\S+?: /
            end
          end
          @pot[:metadata] << z << br
          #puts z unless z.empty?
        end
      end
      def pot_metadata_src_trn
        @po4a_identify_type='type: SiSU doc'
        #@po4a_identify_type='type: Plain text'
        meta_src=SiSU_Metadata::Summary.new(@md_src)
        meta_trn=SiSU_Metadata::Summary.new(@md_trn)
        w=[]
        w << [
          "#. #{@po4a_identify_type} - metadata: title",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.metadata_tags.title.main,
          meta_src.metadata_tags.title.sub,
          meta_src.metadata_tags.title.edition,
          meta_src.metadata_tags.title.note,
          meta_src.metadata_tags.title.short,
          meta_src.metadata_tags.title.language,
          meta_src.metadata_tags.title.language_char,
          'msgstr ""',
          meta_trn.metadata_tags.title.main,
          meta_trn.metadata_tags.title.sub,
          meta_trn.metadata_tags.title.edition,
          meta_trn.metadata_tags.title.note,
          meta_trn.metadata_tags.title.short,
          meta_trn.metadata_tags.title.language,
          meta_trn.metadata_tags.title.language_char,
        ]
        w << [
          "#. #{@po4a_identify_type} - metadata: creator",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.metadata_tags.creator.head,
          meta_src.metadata_tags.creator.author,
          meta_src.metadata_tags.creator.contributor,
          meta_src.metadata_tags.creator.illustrator,
          meta_src.metadata_tags.creator.photographer,
          meta_src.metadata_tags.creator.translator,
          meta_src.metadata_tags.creator.audio,
          meta_src.metadata_tags.creator.digitized_by,
          meta_src.metadata_tags.creator.prepared_by,
          'msgstr ""',
          meta_trn.metadata_tags.creator.head,
          meta_trn.metadata_tags.creator.author,
          meta_trn.metadata_tags.creator.contributor,
          meta_trn.metadata_tags.creator.illustrator,
          meta_trn.metadata_tags.creator.photographer,
          meta_trn.metadata_tags.creator.translator,
          meta_trn.metadata_tags.creator.audio,
          meta_trn.metadata_tags.creator.digitized_by,
          meta_trn.metadata_tags.creator.prepared_by,
        ]
        w << [
          "#. #{@po4a_identify_type} - metadata: rights",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.metadata_tags.rights.head,
          meta_src.metadata_tags.rights.copyright.text,
          meta_src.metadata_tags.rights.copyright.translation,
          meta_src.metadata_tags.rights.copyright.illustrations,
          meta_src.metadata_tags.rights.copyright.photographs,
          meta_src.metadata_tags.rights.copyright.digitization,
          meta_src.metadata_tags.rights.copyright.audio,
          meta_src.metadata_tags.rights.license,
          'msgstr ""',
          meta_trn.metadata_tags.rights.head,
          meta_trn.metadata_tags.rights.copyright.text,
          meta_trn.metadata_tags.rights.copyright.translation,
          meta_trn.metadata_tags.rights.copyright.illustrations,
          meta_trn.metadata_tags.rights.copyright.photographs,
          meta_trn.metadata_tags.rights.copyright.digitization,
          meta_trn.metadata_tags.rights.copyright.audio,
          meta_trn.metadata_tags.rights.license,
        ]
        w << [
          "#. #{@po4a_identify_type} - metadata: classify",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.metadata_tags.classify.head,
          meta_src.metadata_tags.classify.subject,
          meta_src.metadata_tags.classify.topic_register,
          meta_src.metadata_tags.classify.loc,
          meta_src.metadata_tags.classify.dewey,
          #meta_src.metadata_tags.notes.relation,
          #meta_src.metadata_tags.notes.type,
          #meta_src.metadata_tags.identifier.oclc,
          #meta_src.metadata_tags.identifier.isbn,
          'msgstr ""',
          meta_trn.metadata_tags.classify.head,
          meta_trn.metadata_tags.classify.subject,
          meta_trn.metadata_tags.classify.topic_register,
          meta_trn.metadata_tags.classify.loc,
          meta_trn.metadata_tags.classify.dewey,
          #meta_trn.metadata_tags.notes.relation,
          #meta_trn.metadata_tags.notes.type,
          #meta_trn.metadata_tags.identifier.oclc,
          #meta_trn.metadata_tags.identifier.isbn,
        ]
        w << [
          "#. #{@po4a_identify_type} - metadata: date",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.metadata_tags.date.head,
          meta_src.metadata_tags.date.added_to_site,
          meta_src.metadata_tags.date.available,
          meta_src.metadata_tags.date.created,
          meta_src.metadata_tags.date.issued,
          meta_src.metadata_tags.date.modified,
          meta_src.metadata_tags.date.published,
          meta_src.metadata_tags.date.valid,
          'msgstr ""',
          meta_trn.metadata_tags.date.head,
          meta_trn.metadata_tags.date.added_to_site,
          meta_trn.metadata_tags.date.available,
          meta_trn.metadata_tags.date.created,
          meta_trn.metadata_tags.date.issued,
          meta_trn.metadata_tags.date.modified,
          meta_trn.metadata_tags.date.published,
          meta_trn.metadata_tags.date.valid,
        ]
        w << [
          "#. #{@po4a_identify_type} - processing, make instruction",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.processing_tags.make.language,
          meta_src.processing_tags.make.headings,
          meta_src.processing_tags.make.num_top,
          meta_src.processing_tags.make.breaks,
          meta_src.processing_tags.make.emphasis,
          meta_src.processing_tags.make.bold,
          meta_src.processing_tags.make.italics,
          meta_src.processing_tags.make.texpdf_font,
          'msgstr ""',
          meta_trn.processing_tags.make.language,
          meta_trn.processing_tags.make.headings,
          meta_trn.processing_tags.make.num_top,
          meta_trn.processing_tags.make.breaks,
          meta_trn.processing_tags.make.emphasis,
          meta_trn.processing_tags.make.bold,
          meta_trn.processing_tags.make.italics,
          meta_trn.processing_tags.make.texpdf_font,
        ]
        w.each do |y|
          z=''
          y.each do |x|
            if x
              z += x + "\n" if x =~/^#|^msg(?:id|str)/
              z += %{"#{x}"\n} if x =~/^@\S+?:(?: |$)/
              z += %{"#{x}"\n} if x =~/^\s+:\S+?: /
            end
          end
          @pot[:metadata] << z << br
          #puts z unless z.empty?
        end
      end
      def auto_translate?(set_to=nil)
        @@auto_translation_=
        if @md.opt.act[:po4a_lang_trans][:set]==:on
          set_to \
          ? set_to
          : @@auto_translation_
        else :skip
        end
      end
      def auto_translation(src_txt,markup=:src) # check for an appropriate request flag
        auto_translate?(:skip)
        begin
          src_txt_clean=clean_text(src_txt,markup)
          src_txt_clean=src_txt_clean.
            gsub(/\n/,' ').
            gsub(/"/,'\"').
            gsub(/([()])/,'\\\\\1')
          trans=''
          unless auto_translate? == :skip
            require 'timeout'
            Timeout::timeout(60) {
              trans=`trans -b -no-ansi en:#{@md.opt.f_pth[:lng_is]} #{src_txt_clean}`.strip
              unless trans.empty?
                trans + ' {[G.Tr]}http://translate.google.com'
              end
            }
          end
          trans
        rescue
          auto_translate?(:skip)
          p 'timeout issues with translation, skip remaining'
        end
      end
      def pot_structure
        def heading(dob_src='',notes_s='',dob_trn='',notes_t='')   #% used to extract the structure of a document
          lv=n=n3=nil
          lv=dob_src.ln
          n=lv - 1
          n3=lv + 2
          util=nil
          fn=(dob_src.name=~/[a-z\d]/i) ? dob_src.name : ''
          mark="#{dob_src.lv}~#{fn} "
          d="#{dob_src.is.to_s} (level #{dob_src.lv})"
          instruct=s_mark=''
          if @md.opt.act[:maintenance][:set]==:on
            instruct=%{\n# markup for headings is marker at the start of the line/object, } \
            + %{indicating the heading level, and if provided an associated name tag, } \
            + %{this heading is "#{mark}"}
            s_mark="\n# " + %{"\\n\\n#{mark}...\\n\\n"}
          end
          desc="#{d}#{s_mark}#{instruct}"
          orig="#{s_mark}#{dob_src.obj}"
          trans=((dob_trn=='') \
          || (dob_src.obj == dob_trn.obj)) \
          ? ''
          : "#{s_mark}#{dob_trn.obj}"
          if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
          and trans.empty? \
          and auto_translate?
            trans=auto_translation(dob_src.obj,:src)
          end
          util=pot_structure_wrap(desc,orig,trans)
          wrapped=util.line_wrap
          @pot[:body] << wrapped << br # main text, contents, body KEEP
          if @@endnotes[:para] \
          and notes_s.length > 0 \
          and not @@endnotes_
            @pot[:body] << br
            wrap_endnotes(notes_s,notes_t)
          elsif @@endnotes[:para] \
          and @@endnotes_
            @pot[:body] << br*2
          end
        end
        def para(dob_src='',notes_s='',dob_trn='',notes_t='')      #% used to extract the structure of a document
          util=nil
          wrapped=if dob_src.indent =~/[1-9]/ \
          and dob_src.indent == dob_src.hang
            s_mark=desc=orig=trans=''
            if dob_src.bullet_
              mark="_#{dob_src.indent}* "
              d="#{dob_src.is.to_s}: indent #{dob_src.indent}, bullet"
              instruct=s_mark=''
              if @md.opt.act[:maintenance][:set]==:on
                instruct=%{\n# markup for indented bullet text is at the start of the line/object, } \
                + %{an underscore followed by the indent level and an asterisk "#{mark}"}
                s_mark="\n# " + %{"\\n\\n#{mark}...\\n\\n"}
              end
              desc="#{d}#{s_mark}#{instruct}"
            else
              mark="_#{dob_src.indent} "
              d="#{dob_src.is.to_s}: indent #{dob_src.indent}"
              instruct=s_mark=''
              if @md.opt.act[:maintenance][:set]==:on
                instruct=%{\n# markup for indented text is at the start of the line/object, } \
                + %{an underscore followed by the indent level "#{mark}"}
                s_mark="\n# " + %{"\\n\\n#{mark}...\\n\\n"}
              end
              desc="#{d}#{s_mark}#{instruct}"
            end
            orig="#{s_mark}#{dob_src.obj}"
            trans=((dob_trn=='') \
            || (dob_src.obj == dob_trn.obj)) \
            ? ''
            : "#{s_mark}#{dob_trn.obj}"
            if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
            and trans.empty? \
            and auto_translate?
              trans=auto_translation(dob_src.obj,:src)
            end
            util=pot_structure_wrap(desc,orig,trans)
          elsif dob_src.hang =~/[0-9]/ \
          and dob_src.indent != dob_src.hang
            s_mark=desc=orig=trans=''
            mark="_#{dob_src.hang}_#{dob_src.indent} "
            d="#{dob_src.is.to_s}: hang #{dob_src.hang} indent #{dob_src.indent}"
            instruct=s_mark=''
            if @md.opt.act[:maintenance][:set]==:on
              instruct=%{\n# markup for indented text with a first line indented } \
              + %{to a different level from the rest of the paragraph, } \
              + %{is at the start of the line/object, } \
              + %{an underscore and the first indent level } \
              + %{a second underscore and the indent level for the rest of the paragraph, "#{mark1}"}
              s_mark="\n# " + %{"\\n\\n#{mark}...\\n\\n"}
            end
            desc="#{d}#{s_mark}#{instruct}"
            orig="#{s_mark}#{dob_src.obj}"
            trans=((dob_trn=='') \
            || (dob_src.obj == dob_trn.obj)) \
            ? ''
            : "#{s_mark}#{dob_trn.obj}"
            if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
            and trans.empty? \
            and auto_translate?
              trans=auto_translation(dob_src.obj,:src)
            end
            util=pot_structure_wrap(desc,orig,trans)
          else
            s_mark=desc=orig=trans=''
            if dob_src.bullet_
              mark='_* '
              d="#{dob_src.is.to_s}: bullet"
              instruct=s_mark=''
              if @md.opt.act[:maintenance][:set]==:on
                instruct=%{\n# markup for indented text is at the start of the line/object, } \
                + %{an underscore followed by an asterisk "#{mark}"}
                s_mark="\n# " + %{"\\n\\n#{mark}...\\n\\n"}
              end
              desc="#{d}#{s_mark}#{instruct}"
              orig="#{s_mark}#{dob_src.obj}"
              trans=((dob_trn=='') \
              || (dob_src.obj == dob_trn.obj)) \
              ? ''
              : "#{s_mark}#{dob_trn.obj}"
              if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
              and trans.empty? \
              and auto_translate?
                trans=auto_translation(dob_src.obj,:src)
              end
            else
              mark=''
              d=dob_src.is.to_s
              instruct=%{\n# regular paragraph, no special markup}
              if @md.opt.act[:maintenance][:set]==:on
                instruct="\n# "
                s_mark="\n# " + %{"\\n\\n#{mark}...\\n\\n"}
              end
              desc="#{d}#{s_mark}#{instruct}"
              orig=dob_src.obj
              trans=((dob_trn=='') \
              || (dob_src.obj == dob_trn.obj)) \
              ? ''
              : "#{s_mark}#{dob_trn.obj}"
              if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
              and trans.empty? \
              and auto_translate?
                trans=auto_translation(dob_src.obj,:src)
              end
            end
            util=pot_structure_wrap(desc,orig,trans)
          end
          wrapped=util.line_wrap
          @pot[:body] << wrapped << br # main text, contents, body KEEP
          if @@endnotes[:para] \
          and notes_s.length > 0 \
          and not @@endnotes_
            @pot[:body] << br
            wrap_endnotes(notes_s,notes_t)
          elsif @@endnotes[:para] \
          and @@endnotes_
            @pot[:body] << br*2
          end
        end
        def block(dob_src='',notes_s='',dob_trn='',notes_t='')     #% used to extract the structure of a document
          mark="block{\\n\\n...\\n\\n}block"
          d=dob_src.is.to_s
          instruct=s_mark=''
          if @md.opt.act[:maintenance][:set]==:on
            instruct=%{\n# block text is a text block with an opening and closing marker, } \
            + %{the content of which may be wrapped}
            s_mark="\n# " + %{"\\n\\n#{mark}\\n\\n"}
          end
          desc="#{d}#{s_mark}#{instruct}"
          orig=dob_src.obj
          trans=((dob_trn=='') \
          || (dob_src.obj == dob_trn.obj)) \
          ? ''
          : "#{s_mark}#{dob_trn.obj}"
          if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
          and trans.empty? \
          and auto_translate?
            trans=auto_translation(dob_src.obj,:src)
          end
          util=pot_structure_wrap(desc,orig,trans)
          unwrapped=util.no_line_wrap_block
          @pot[:body] << unwrapped << br
        end
        def group(dob_src='',notes_s='',dob_trn='',notes_t='')     #% used to extract the structure of a document
          mark="group{\\n\\n...\\n\\n}group"
          d=dob_src.is.to_s
          instruct=s_mark=''
          if @md.opt.act[:maintenance][:set]==:on
            instruct=%{\n# group text is a text block with an opening and closing marker, } \
            + %{the content of which may be wrapped}
            s_mark="\n# " + %{"\\n\\n#{mark}\\n\\n"}
          end
          desc="#{d}#{s_mark}#{instruct}"
          orig=dob_src.obj
          trans=((dob_trn=='') \
          || (dob_src.obj == dob_trn.obj)) \
          ? ''
          : "#{s_mark}#{dob_trn.obj}"
          if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
          and trans.empty? \
          and auto_translate?
            trans=auto_translation(dob_src.obj,:src)
          end
          util=pot_structure_wrap(desc,orig,trans)
          unwrapped=util.no_line_wrap_block
          @pot[:body] << unwrapped << br
        end
        def verse(dob_src='',notes_s='',dob_trn='',notes_t='')     #% used to extract the structure of a document
          mark="poem{\n\nverse\n\nverse\n\n...\n\n}poem"
          d=dob_src.is.to_s
          instruct=s_mark=''
          if @md.opt.act[:maintenance][:set]==:on
            instruct=%{\n# verse are part of the text block described as a poem, } \
            + %{the first verse is preceeded by an opening marker, } \
            + %{and the last verse by a closing marker, } \
            + %{the content of which should remain unwrapped}
            s_mark="\n# " + %{"\\n\\n#{mark}\\n\\n"}
          end
          desc="#{d}#{s_mark}#{instruct}"
          orig=dob_src.obj
          trans=(dob_trn=='') ? '' : dob_trn.obj
          util=pot_structure_wrap(desc,orig,trans)
          unwrapped=util.no_line_wrap_block
          @pot[:body] << unwrapped << br
        end
        def code(dob_src='',notes_s='',dob_trn='',notes_t='')      #% used to extract the structure of a document
          mark="code{\\n\\n...\\n\\n}code"
          d=dob_src.is.to_s
          instruct=s_mark=''
          if @md.opt.act[:maintenance][:set]==:on
            instruct=%{\n# codeblocks are a text block with an opening and closing marker, } \
            + %{the content of which should remain unwrapped}
            s_mark="\n# " + %{"\\n\\n#{mark}\\n\\n"}
          end
          desc="#{d}#{s_mark}#{instruct}"
          orig=dob_src.obj
          trans=(dob_trn=='') ? '' : dob_trn.obj
          util=pot_structure_wrap(desc,orig,trans)
          unwrapped=util.no_line_wrap_block
          @pot[:body] << unwrapped << br
        end
        def table(dob_src='',notes_s='',dob_trn='',notes_t='')     #% used to extract the structure of a document
          mark="table{\\n\\n...\\n\\n}table"
          d=dob_src.is.to_s
          instruct=s_mark=''
          if @md.opt.act[:maintenance][:set]==:on
            instruct=%{\n# tables are a text block with an opening and closing marker, } \
            + %{the content of which should remain unwrapped}
            s_mark="\n# " + %{"\\n\\n#{mark}\\n\\n"}
          end
          desc="#{d}#{s_mark}#{instruct}"
          orig=dob_src.obj
          orig=orig.gsub(/#{Mx[:tc_c]}/,"\n")
          trans=(dob_trn=='') ? '' : dob_trn.obj
          trans=trans.gsub(/#{Mx[:tc_c]}/,"\n")
          util=pot_structure_wrap(desc,orig,trans)
          unwrapped=util.no_line_wrap_block
          @pot[:body] << unwrapped << br
        end
        def idx_markup(idx)
          struct=['={']
          idx.sort.each do |x|
            x.each_with_index do |y,i0|
              case y
              when String
                struct << ';' unless struct[-1] =~/=\{/
                struct << y
                if x[i0+1].class == Hash \
                and x[i0+1][:sub].length > 0
                  struct << ':'
                end
              when Hash
                if y[:plus].to_i > 0
                  struct << '+' + y[:plus].to_s
                end
                if y[:sub].length > 0
                  y[:sub].each_with_index do |z,i1|
                    z.each_with_index do |a,i2|
                      #p a
                      if z.length > 0
                        struct << a[0]
                        if a[1][:plus].to_i > 0
                          struct << '+' + a[1][:plus].to_s
                        end
                        if (i1 + 1) < y[:sub].length
                          struct << '|'
                        end
                      end
                    end
                  end
                end
              end
            end
          end
          struct << '}'
          #puts struct.join
          struct.join
        end
        def idx(dob_src='',dob_trn='')                             #% used for book index but broken as original markup lost, already abstracted, fix
          mark="={ ... }"
          instruct=s_mark=''
          if @md.opt.act[:maintenance][:set]==:on
            instruct=%{\n# the book index should be attached unwrapped to the preceding text block } \
            + %{(there should be a new line, but no empty line)}
            s_mark="\n# " + %{"\\n#{mark}\\n\\n"}
          end
          d='book-idx'
          desc="#{d}#{s_mark}#{instruct}"
          orig=pot_structure.idx_markup(dob_src.idx) #'={' + dob_src.idx + '}'
          trans=if defined? dob_trn.idx \
          and not dob_trn.idx.nil? \
          and not dob_trn.idx.empty?
            pot_structure.idx_markup(dob_trn.idx) #'={' + dob_trn.idx + '}'
          else ''
          end
          util=pot_structure_wrap(desc,orig,trans)
          unwrapped=util.no_line_wrap_block
          @pot[:body] << unwrapped << br
        end
        self
      end
      def pot_markup(data_src,data_trn)
        #@endnotes,@copen,@pot_contents_close=Array.new(3){[]}
        a_l=if data_trn
        a_l=(data_src.length >= data_trn.length) \
        ? data_src.length
        : data_trn.length
        else
          data_src.length
        end
        s,t=0,0
        if @md.fns =~ /\.(?:(?:-|ssm\.)?sst|ssm)$/
          (data_trn.nil?) \
          ? pot_metadata_src
          : pot_metadata_src_trn
        end
        0.upto(a_l-1) do |i|
          if data_trn
            unless data_src[s] \
            and data_trn[t]
              break
            end
            if data_src[s].of == :comment \
            and data_trn[t].of == :comment \
            and (data_src[s].is == data_trn[t].is)
              s+=1;t+=1
              next
            end
            if ((data_src[s].is == :comment) \
            || (data_trn[t].is == :comment)) \
            and (data_src[s].is != data_trn[t].is)
              if data_src[s].is == :comment
                if @md.opt.act[:maintenance][:set]==:on
                  puts "src (comment):\n\t" \
                  + data_src[s].obj
                end
                s+=1
                #next if data_src[s].is == :comment
              elsif data_trn[t].is == :comment
                if @md.opt.act[:maintenance][:set]==:on
                  puts "trans (comment):\n\t" \
                  + data_trn[t].obj
                end
                t+=1
                #next if data_trn[t].is == :comment
              end
            end
            if ((defined? data_src[s].ocn) \
            && (data_src[s].ocn.is_a?(Fixnum))) \
            and ((defined? data_trn[t].ocn) \
            && (data_trn[t].ocn.is_a?(Fixnum))) \
            and (data_src[s].ocn == data_trn[t].ocn)
              @m_s,@m_t=s,t
            elsif ((defined? data_src[s].ocn) \
            && (data_src[s].ocn.is_a?(Fixnum))) \
            and ((defined? data_trn[t].ocn) \
            && (data_trn[t].ocn.is_a?(Fixnum))) \
            and (data_src[s].ocn != data_trn[t].ocn)
              p '--- OCN ---'
              p 'mis-match'
              p data_src[s].ocn
              p data_src[s].obj
              p data_trn[t].ocn
              p data_trn[t].obj
              p '---'
              p 'previous match'
              p data_src[@m_s].ocn
              p data_src[@m_s].obj
              p data_trn[@m_t].ocn
              p data_trn[@m_t].obj
              exit
            elsif (((defined? data_src[s].ocn) \
            && (defined? data_trn[t].ocn)) \
            and data_src[s].ocn.class != data_trn[t].ocn.class)
              p '--- OCN class ---'
              p 'mis-match'
              p data_src[s].ocn if defined? data_src[s].ocn
              p data_src[s].obj
              p data_trn[t].ocn if defined? data_trn[t].ocn
              p data_trn[t].obj
              #p '---'
              #p 'previous match'
              #p data_src[@m_s].ocn
              #p data_src[@m_s].obj
              #p data_trn[@m_t].ocn
              #p data_trn[@m_t].obj
            #elsif (defined? data_src[s].ocn != defined? data_trn[t].ocn) \
            #and (data_src[s].ocn.nil? != data_trn[t].ocn.nil?)
            #  p '--- missing OCN? ---'
            #  p 'mis-match'
            #  p data_src[s].ocn if defined? data_src[s].ocn
            #  p data_src[s].obj
            #  p data_trn[t].ocn if defined? data_trn[t].ocn
            #  p data_trn[t].obj
            else
            end
          end
          notes_s,notes_t='',''
          data_src[s],notes_s=markup(data_src[s])
          if data_trn
            data_trn[t],notes_t=markup(data_trn[t])
            #data_src[s],data_trn[t]=pot_data(data_src[s],notes_s,data_trn[t],notes_t)
            pot_data(data_src[s],notes_s,data_trn[t],notes_t)
          else
            #data_src[s],nul=pot_data(data_src[s],notes_s)
            pot_data(data_src[s],notes_s)
          end
          s+=1;t+=1
        end
        @pot #watch
      end
      def pot_data(dob_src='',notes_s='',dob_trn='',notes_t='')
        if dob_src.obj !~/(^#{Rx[:meta]}|#{Mx[:br_eof]}|#{Mx[:br_endnotes]})/
          if defined? dob_src.ocn \
          and dob_src.ocn.to_s =~/\d+/
            paranum=dob_src.ocn.to_s
            @p_num=SiSU_Po4aUtils::ParagraphNumber.new(paranum)
          end
          case dob_src.is
          when :heading
            pot_structure.heading(dob_src,notes_s,dob_trn,notes_t)
          when :para
            pot_structure.para(dob_src,notes_s,dob_trn,notes_t)
          when :group
            pot_structure.group(dob_src,notes_s,dob_trn,notes_t)
          when :block
            pot_structure.block(dob_src,notes_s,dob_trn,notes_t)
          when :verse
            pot_structure.verse(dob_src,notes_s,dob_trn,notes_t)
          when :code
            pot_structure.code(dob_src,notes_s,dob_trn,notes_t)
          when :table
            pot_structure.table(dob_src,notes_s,dob_trn,notes_t)
          end
          if defined? dob_src.idx \
          and not dob_src.idx.nil? \
          and not dob_src.idx.empty?
            pot_structure.idx(dob_src,dob_trn)
          end
          dob_src='' if (dob_src.obj =~/<a name="n\d+">/ \
          and dob_src.obj =~/^(-\{{2}~\d+|<!e[:_]\d+!>)/) # -endnote
          if dob_src ## Clean Prepared Text
            dob_src.obj=dob_src.obj.gsub(/<!.+!>/,' ').
              gsub(/<:\S+>/,' ') if dob_src ## Clean Prepared Text
          end
        end
        #[dob_src,dob_trn]
      end
      def markup(dob)
        dob,notes=objects.textface_marks_po4a(dob,:separate)
        [dob,notes]
      end
      def publish(fn,pot)
        content=[]
        content << pot[:open]
        content << pot[:head]
        content << pot[:metadata]
        content << pot[:body]
        content << @@endnotes[:end] if @@endnotes_
        Output.new(fn,content,@md,@process).po4a
        @@endnotes={ para: [], end: [] }
      end
    end
    class Po4aCfg
      include SiSU_Composite_Doc_Utils                    # composite doc, .ssm, extract all related insert files, array of filenames test
      def initialize(opt,file)
        @opt,@file=opt,file
      end
      def po4a_cfg_filename
        'po4a.cfg'
      end
      def dir
        def pwd
          Dir.pwd
        end
        def po4a_
          'po4a/' # ''
        end
        def pot
          po4a_ + 'pot'
        end
        def po
          po4a_ + 'po'
        end
        self
      end
      def po4a_cfg_file
        File.open("#{Dir.pwd}/#{po4a_cfg_filename}",'w')
      end
      def language
        def sisu_languages_available
          Px[:lng_lst]
        end
        def translation_languages_selected
          @opt.act[:po4a_lang_trans][:trn] \
          ? @opt.act[:po4a_lang_trans][:trn]
          : []
        end
        def translation_languages_selected_that_are_available
          translation_languages_selected & sisu_languages_available
        end
        def source_language_selected_str
          @opt.act[:po4a_lang_trans][:src] \
          ? @opt.act[:po4a_lang_trans][:src]
          : 'en'
        end
        def translation_languages_selected_that_are_available_str
          translation_languages_selected_that_are_available.join(' ')
        end
        def translation_languages_selected_str
          @opt.act[:po4a_lang_trans][:trn].join(' ')
        end
        self
      end
      def po4a_cfg
        doc_import_list=composite_and_imported_filenames_array(@opt.fno)
        po4a_cfg_arr=[]
        po4a_cfg_arr \
          << "[po4a_langs] #{language.translation_languages_selected_that_are_available_str}"
        po4a_cfg_arr \
          << "[po4a_paths] #{dir.pot}/$master.pot $lang:#{dir.po}/$lang/$master.po"
        doc_import_list.each do |file_src|
          file_src_fn=
            file_src.gsub(/#{language.source_language_selected_str}\//,'')
          po4a_cfg_arr \
            << "[type: text] #{file_src} $lang:$lang/#{file_src_fn}"
        end
        file=@file.write_file.po4a_cfg
        po4a_cfg_arr.each do |txt|
        puts txt
          file << txt << "\n"
        end
        file.close
      end
    end
    class Output <Source
      include SiSU_Param
      include SiSU_Env
      def initialize(fn,content,md,process=:complete)
        @fn,@content,@md,@process=fn,content,md,process
        @file=SiSU_Env::FileOp.new(md,fn)
      end
      def po4a                                                                 #%pot output
        file_pot=(@md.opt.f_pth[:lng] == @md.opt.lng_base) \
        ? @file.write_file.pot
        : @file.write_file.po
        @sisu=[]
        emptyline=0
        @content.each do |para|                                                # this is a hack
          if para.is_a?(Array) \
          and para.length > 0
            para.each do |line|
              if line
                line=line.gsub(/\s+$/m,'').
                  gsub(/^\A[ ]*\Z/m,'')
                if line=~/^\A[ ]*\Z/m
                  emptyline+=1
                else emptyline=0
                end
                file_pot.puts line if emptyline < 2                     #remove extra line spaces (fix upstream)
              end
            end
          else file_pot.puts para          #unix plaintext # /^([*=-]|\.){5}/
          end
        end
        file_pot.close
        SiSU_Po4aUtils::PotNumber.new.reset
        po4a_git
      end
      def po4a_git
        unless @md.opt.act[:maintenance][:set]==:on
          require_relative 'git'                           # git.rb
          git=SiSU_Git::Source.new(@md.opt,@process)
          unless FileTest.directory?(@file.output_path.pot_git.dir)
            git.create_file_structure_git
          end
          if @md.opt.f_pth[:lng] == @md.opt.lng_base
            FileUtils::cp(
              @file.place_file.pot.dir,
              @file.output_path.pot_git.dir
            )
          else # naive, work on -->
            FileUtils::cp(
              @file.place_file.po.dir,
              @file.output_path.po_git.dir
            ) #unless FileTest.file?(@file.place_file.po_git.dir)
          end
          git.read
        end
      end
    end
  end
end
__END__
&#033;\|&#035;\|&&#042;\|&#045;\|&#047;\|&#095;\|&#123;\|&#125;\|&#126;\|&#

tables are problematic, difficult to reconstitute instruction, check

metadata, move to top? and work on

footnotes, different types, asterisk, also do you want to have separate
paragraphs, or breaks within one block?

where no ocn appropriately use ~# or -# or indeed 1~name-

comments in document, what to do about them, not sure they are currently
retained in dal, could be quite valuable to keep

Translate Shell
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