/+
- Name: Spine, Doc Reform [a part of]
  - Description: documents, structuring, processing, publishing, search
    - static content generator

  - Author: Ralph Amissah
    [ralph.amissah@gmail.com]

  - Copyright: (C) 2015 - 2022 Ralph Amissah, All Rights
    Reserved.

  - License: AGPL 3 or later:

    Spine (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 AFERO 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 [https://www.gnu.org/licenses/].

    If you have Internet connection, the latest version of the AGPL should be
    available at these locations:
    [https://www.fsf.org/licensing/licenses/agpl.html]
    [https://www.gnu.org/licenses/agpl.html]

  - Spine (by Doc Reform, related to SiSU) uses standard:
    - docReform markup syntax
      - standard SiSU markup syntax with modified headers and minor modifications
    - docReform object numbering
      - standard SiSU object citation numbering & system

  - Homepages:
    [https://www.doc_reform.org]
    [https://www.sisudoc.org]

  - Git
    [https://git.sisudoc.org/projects/?p=software/spine.git;a=summary]

+/
/++
  json headers<BR>
  extract json header return json
+/
module doc_reform.meta.conf_make_meta_json;
static template contentJSONtoSpineStruct() {
  import
    std.algorithm,
    std.array,
    std.exception,
    std.regex,
    std.stdio,
    std.string,
    std.typecons,
    std.utf,
    std.conv : to;
  import
    doc_reform.meta.conf_make_meta_structs,
    doc_reform.meta.conf_make_meta_json,
    doc_reform.meta.defaults,
    doc_reform.meta.rgx;
  ConfComposite _struct_composite;
  @safe auto contentJSONtoSpineStruct(C,J,M)(C _struct_composite, J _json, M _manifested, string _identifier) {
    mixin spineRgxIn;
    static auto rgx = RgxI();
    debug (json) {
      writeln(">> --------------------------- >>");
      foreach (tag0; _json.object.byKeyValue) {
        if (tag0.value.stringof == "string") {
          writeln(tag0.key, ": ", tag0.value);
        } else {
          // writeln(tag0.key, ":");
          foreach (tag1; tag0.value.object.byKeyValue) {
            writeln(tag0.key, ":", tag1.key, ": ", tag1.value);
          }
        }
      }
      writeln("<< --------------------------- <<");
    }
    confCompositeMakeBuild _mk;
    /+ make ------------------------------------------------------------------- +/
    if ("make" in _json.object) {
      if ("doc_type" in _json.object["make"]
        && (_json.object["make"]["doc_type"].type().to!string == "string")
      ) {
        _struct_composite.make_str.doc_type = _json.object["make"]["doc_type"].str;
      }
      if ("breaks" in _json.object["make"]
        && (_json.object["make"]["breaks"].type().to!string == "string")
      ) {
        _struct_composite.make_str.breaks = _json.object["make"]["breaks"].str;
      }
      if ("bold" in _json.object["make"]
        && (_json.object["make"]["bold"].type().to!string == "string")
      ) {
        _struct_composite.make_str.bold = _json.object["make"]["bold"].str;
      }
      if ("cover_image" in _json.object["make"]
        && (_json.object["make"]["cover_image"].type().to!string == "string")
      ) {
        _struct_composite.make_str.cover_image = _json.object["make"]["cover_image"].str;
      }
      if ("css" in _json.object["make"]
        && (_json.object["make"]["css"].type().to!string == "string")
      ) {
        _struct_composite.make_str.css = _json.object["make"]["css"].str;
      }
      if ("emphasis" in _json.object["make"]
        && (_json.object["make"]["emphasis"].type().to!string == "string")
      ) {
        _struct_composite.make_str.emphasis = _json.object["make"]["emphasis"].str;
      }
      if ("footer" in _json.object["make"]) {
        if (_json.object["make"]["footer"].type().to!string == "string") {
          char[][] __match_footer_array
            = (cast(char[]) _json.object["make"]["footer"].str)
              .split(rgx.make_heading_delimiter);
          _struct_composite.make_str.footer = __match_footer_array.to!(string[]);
        } else if (_json.object["make"]["footer"].type().to!string == "array") {
          string[] _match_footer_array;
          foreach (_match_heading; _json.object["make"]["footer"].arrayNoRef) {
            _match_footer_array ~= _match_heading.str;
          }
          _struct_composite.make_str.footer = _match_footer_array;
        }
      }
      if ("headings" in _json.object["make"]) {
        if (_json.object["make"]["headings"].type().to!string == "string") {
         char[][] __match_headings_array
            = (cast(char[]) _json.object["make"]["headings"].str)
              .split(rgx.make_heading_delimiter);
          _struct_composite.make_str.headings = __match_headings_array.to!(string[]);
        } else if (_json.object["make"]["headings"].type().to!string == "array") {
          string[] _match_headings_array;
          foreach (_match_heading; _json.object["make"]["headings"].arrayNoRef) {
            _match_headings_array ~= _match_heading.str;
          }
          _struct_composite.make_str.headings = _match_headings_array;
        }
      }
      if ("home_button_image" in _json.object["make"]) {
        if (_json.object["make"]["home_button_image"].type().to!string == "string") {
         char[][] __match_home_button_image_array
            = (cast(char[]) _json.object["make"]["home_button_image"].str)
              .split(rgx.make_heading_delimiter);
          _struct_composite.make_str.home_button_image = __match_home_button_image_array.to!(string[]);
        } else if (_json.object["make"]["home_button_image"].type().to!string == "array") {
          string[] _match_home_button_image_array;
          foreach (_match_heading; _json.object["make"]["home_button_image"].arrayNoRef) {
            _match_home_button_image_array ~= _match_heading.str;
          }
          _struct_composite.make_str.home_button_image = _match_home_button_image_array;
        }
      }
      if ("home_button_text" in _json.object["make"]) {
        if (_json.object["make"]["home_button_text"].type().to!string == "string") {
          _struct_composite.make_str.home_button_text = _json.object["make"]["home_button_text"].str;
        } else if (_json.object["make"]["home_button_text"].type().to!string == "array") {
          string[] _match_home_button_text_array;
          foreach (_match_heading; _json.object["make"]["home_button_text"].arrayNoRef) {
            _match_home_button_text_array ~= _match_heading.str;
          }
          string _match_home_button_text_str = (_match_home_button_text_array).join("; ");
          _struct_composite.make_str.home_button_text = _match_home_button_text_str;
        }
      }
      if ("italics" in _json.object["make"]
        && (_json.object["make"]["italics"].type().to!string == "string")
      ) {
        _struct_composite.make_str.italics = _json.object["make"]["italics"].str;
      }
      if ("auto_num_top_at_level" in _json.object["make"] // str == A - D, 1 - 4
        && (_json.object["make"]["auto_num_top_at_level"].type().to!string == "string")
      ) {
        _struct_composite.make_str.auto_num_top_at_level = _json.object["make"]["auto_num_top_at_level"].str;
        switch (_json.object["make"]["auto_num_top_at_level"].str) {
        case "A":
          break;
        case "B": _struct_composite.make_str.auto_num_top_lv = 1;
          break;
        case "C": _struct_composite.make_str.auto_num_top_lv = 2;
          break;
        case "D": _struct_composite.make_str.auto_num_top_lv = 3;
          break;
        case "1": _struct_composite.make_str.auto_num_top_lv = 4;
          break;
        case "2": _struct_composite.make_str.auto_num_top_lv = 5;
          break;
        case "3": _struct_composite.make_str.auto_num_top_lv = 6;
          break;
        case "4": _struct_composite.make_str.auto_num_top_lv = 7;
          break;
        default:
          break;
        }
      }
      if ("auto_num_depth" in _json.object["make"]) {
        if (_json.object["make"]["auto_num_depth"].type().to!string == "int") { // TODO watch this match
          _struct_composite.make_str.auto_num_depth = _json.object["make"]["auto_num_depth"].integer.to!int;
        } else if (_json.object["make"]["auto_num_depth"].type().to!string == "string") {
          _struct_composite.make_str.auto_num_depth = _json.object["make"]["auto_num_depth"].str.to!int;
        }
      }
      if ("substitute" in _json.object["make"]) {
        string[][] _sub;
        if (_json.object["make"]["substitute"].type().to!string == "array") {
          if (_json.object["make"]["substitute"][0].type().to!string == "array") {
            foreach (substitute_pair; _json.object["make"]["substitute"].arrayNoRef) {
              if ((substitute_pair.type().to!string) == "array") {
                if (!empty(substitute_pair[0].str) && !empty(substitute_pair[1].str)) {
                  _sub ~= [ substitute_pair[0].str,  substitute_pair[1].str];
                }
              }
            }
          } else if (_json.object["make"]["substitute"][0].type().to!string == "string") {
             if (!empty(_json.object["make"]["substitute"][0].str) && !empty(_json.object["make"]["substitute"][1].str)) {
               _sub = [[_json.object["make"]["substitute"][0].str, _json.object["make"]["substitute"][1].str]];
             }
          }
        }
        // writeln(_sub);
        _struct_composite.make_str.substitute  = _sub;
      }
      if ("texpdf_font" in _json.object["make"]
        && (_json.object["make"]["texpdf_font"].type().to!string == "string")
      ) {
        _struct_composite.make_str.texpdf_font  = _json.object["make"]["texpdf_font"].str;
      }
      _struct_composite.make.bold                     = _mk.bold(_struct_composite.make_str.bold);
      _struct_composite.make.breaks                   = _mk.breaks(_struct_composite.make_str.breaks);
      _struct_composite.make.cover_image              = _mk.cover_image(_struct_composite.make_str.cover_image);
      _struct_composite.make.css                      = _mk.css(_struct_composite.make_str.css);
      _struct_composite.make.emphasis                 = _mk.emphasis(_struct_composite.make_str.emphasis);
      _struct_composite.make.footer                   = _mk.footer(_struct_composite.make_str.footer);
      _struct_composite.make.headings                 = _mk.headings(_struct_composite.make_str.headings);
      _struct_composite.make.home_button_image        = _mk.home_button_image(_struct_composite.make_str.home_button_image);
      _struct_composite.make.home_button_text         = _mk.home_button_text(_struct_composite.make_str.home_button_text);
      _struct_composite.make.italics                  = _mk.italics(_struct_composite.make_str.italics);
      _struct_composite.make.auto_num_top_at_level    = _mk.auto_num_top_at_level(_struct_composite.make_str.auto_num_top_at_level);
      _struct_composite.make.auto_num_top_lv          = _mk.auto_num_top_lv(_struct_composite.make_str.auto_num_top_lv);
      _struct_composite.make.auto_num_depth           = _mk.auto_num_depth(_struct_composite.make_str.auto_num_depth);
      _struct_composite.make.substitute               = _mk.substitute(_struct_composite.make_str.substitute);
      _struct_composite.make.texpdf_font              = _mk.texpdf_font(_struct_composite.make_str.texpdf_font);
    }
    /+ conf ------------------------------------------------------------------- +/
    if ("webserv" in _json.object) {
      if ("data_root_url" in _json.object["webserv"]
        && (_json.object["webserv"]["data_root_url"].type().to!string == "string")
      ) {
        _struct_composite.conf.w_srv_data_root_url = _json.object["webserv"]["data_root_url"].str;
        if (auto m = _struct_composite.conf.w_srv_data_root_url.match(rgx.webserv_data_root_url)) {
          _struct_composite.conf.w_srv_url_host = m.captures[2].to!string;
          _struct_composite.conf.w_srv_url_doc_path = m.captures[3].to!string;
        }
      }
      if ("images" in _json.object["webserv"]
        && (_json.object["webserv"]["images"].type().to!string == "string")
      ) {
        _struct_composite.conf.w_srv_images = _json.object["webserv"]["images"].str;
      }
      if ("cgi" in _json.object["webserv"]
        && (_json.object["webserv"]["cgi"].type().to!string == "string")
      ) {
        _struct_composite.conf.w_srv_cgi = _json.object["webserv"]["cgi"].str;
      }
      if ("cgi_host" in _json.object["webserv"]
        && (_json.object["webserv"]["cgi_host"].type().to!string == "string")
      ) {
        _struct_composite.conf.w_srv_cgi_host = _json.object["webserv"]["cgi_host"].str;
      }
      if ("cgi_host_path" in _json.object["webserv"]
        && (_json.object["webserv"]["cgi_host_path"].type().to!string == "string")
      ) {
        _struct_composite.conf.w_srv_cgi_host_path = _json.object["webserv"]["cgi_host_path"].str;
      }
      if ("cgi_port" in _json.object["webserv"]
        && (_json.object["webserv"]["cgi_port"].type().to!string == "string")
      ) {
        _struct_composite.conf.w_srv_cgi_port = _json.object["webserv"]["cgi_port"].str;
      }
      if ("cgi_user" in _json.object["webserv"]
        && (_json.object["webserv"]["cgi_user"].type().to!string == "string")
      ) {
        _struct_composite.conf.w_srv_cgi_user = _json.object["webserv"]["cgi_user"].str;
      }
      if ("cgi_file_links" in _json.object["webserv"]
        && (_json.object["webserv"]["cgi_file_links"].type().to!string == "string")
      ) {
        _struct_composite.conf.w_srv_cgi_file_links = _json.object["webserv"]["cgi_file_links"].str;
      }
    }
    if ("processing" in _json.object) {
      if ("path" in _json.object["processing"]
        && (_json.object["processing"]["path"].type().to!string == "string")
      ) {
        _struct_composite.conf.processing_path = _json.object["processing"]["path"].str;
      }
      if ("dir" in _json.object["processing"]
        && (_json.object["processing"]["dir"].type().to!string == "string")
      ) {
        _struct_composite.conf.processing_dir = _json.object["processing"]["dir"].str;
      }
      if ("concord_max" in _json.object["processing"]
        && (_json.object["processing"]["concord_max"].type().to!string == "string")
      ) {
        _struct_composite.conf.processing_concord_max = _json.object["processing"]["concord_max"].str;
      }
    }
    if ("flag" in _json.object) {
      if ("act0" in _json.object["flag"]
        && (_json.object["flag"]["act0"].type().to!string == "string")
      ) {
        _struct_composite.conf.flag_act0 = _json.object["flag"]["act0"].str;
      }
      if ("act1" in _json.object["flag"]
        && (_json.object["flag"]["act1"].type().to!string == "string")
      ) {
        _struct_composite.conf.flag_act1 = _json.object["flag"]["act1"].str;
      }
      if ("act2" in _json.object["flag"]
        && (_json.object["flag"]["act2"].type().to!string == "string")
      ) {
        _struct_composite.conf.flag_act2 = _json.object["flag"]["act2"].str;
      }
      if ("act3" in _json.object["flag"]
        && (_json.object["flag"]["act3"].type().to!string == "string")
      ) {
        _struct_composite.conf.flag_act3 = _json.object["flag"]["act3"].str;
      }
      if ("act4" in _json.object["flag"]
        && (_json.object["flag"]["act4"].type().to!string == "string")
      ) {
        _struct_composite.conf.flag_act4 = _json.object["flag"]["act4"].str;
      }
      if ("act5" in _json.object["flag"]
        && (_json.object["flag"]["act5"].type().to!string == "string")
      ) {
        _struct_composite.conf.flag_act5 = _json.object["flag"]["act5"].str;
      }
      if ("act6" in _json.object["flag"]
        && (_json.object["flag"]["act6"].type().to!string == "string")
      ) {
        _struct_composite.conf.flag_act6 = _json.object["flag"]["act6"].str;
      }
      if ("act7" in _json.object["flag"]
        && (_json.object["flag"]["act7"].type().to!string == "string")
      ) {
        _struct_composite.conf.flag_act7 = _json.object["flag"]["act7"].str;
      }
      if ("act8" in _json.object["flag"]
        && (_json.object["flag"]["act8"].type().to!string == "string")
      ) {
        _struct_composite.conf.flag_act8 = _json.object["flag"]["act8"].str;
      }
      if ("act9" in _json.object["flag"]
        && (_json.object["flag"]["act9"].type().to!string == "string")
      ) {
        _struct_composite.conf.flag_act9 = _json.object["flag"]["act9"].str;
      }
    }
    if ("default" in _json.object) {
      if ("papersize" in _json.object["default"]
        && (_json.object["default"]["papersize"].type().to!string == "string")
      ) {
        _struct_composite.conf.set_papersize = _json.object["default"]["papersize"].str;
      }
      if ("text_wrap" in _json.object["default"]
        && (_json.object["default"]["text_wrap"].type().to!string == "string")
      ) {
        _struct_composite.conf.set_text_wrap = _json.object["default"]["text_wrap"].str;
      }
      if ("emphasis" in _json.object["default"]
        && (_json.object["default"]["emphasis"].type().to!string == "string")
      ) {
        _struct_composite.conf.set_emphasis = _json.object["default"]["emphasis"].str;
      }
      if ("language" in _json.object["default"]
        && (_json.object["default"]["language"].type().to!string == "string")
      ) {
        _struct_composite.conf.set_language = _json.object["default"]["language"].str;
      }
      if ("digest" in _json.object["default"]
        && (_json.object["default"]["digest"].type().to!string == "string")
      ) {
        _struct_composite.conf.set_digest = _json.object["default"]["digest"].str;
      }
    }
    if ("search" in _json.object) {
      if ("flag" in _json.object["search"]
        && (_json.object["search"]["flag"].type().to!string == "string")
      ) {
        _struct_composite.conf.search_flag = _json.object["search"]["flag"].str;
      }
      if ("action" in _json.object["search"]
        && (_json.object["search"]["action"].type().to!string == "string")
      ) {
        _struct_composite.conf.search_action = _json.object["search"]["action"].str;
      }
      if ("db" in _json.object["search"]
        && (_json.object["search"]["db"].type().to!string == "string")
      ) {
        _struct_composite.conf.search_db = _json.object["search"]["db"].str;
      }
      if ("title" in _json.object["search"]
        && (_json.object["search"]["title"].type().to!string == "string")
      ) {
        _struct_composite.conf.search_title = _json.object["search"]["title"].str;
      }
    }
    /+ meta ------------------------------------------------------------------- +/
    if (_struct_composite.meta.creator_author.empty) {
      if ("creator" in _json.object) {
        if ("author" in _json.object["creator"]
          && (_json.object["creator"]["author"].type().to!string == "string")
        ) {
          _struct_composite.meta.creator_author = _json.object["creator"]["author"].str;
        }
        if ("email" in _json.object["creator"]
          && (_json.object["creator"]["email"].type().to!string == "string")
        ) {
          _struct_composite.meta.creator_author_email = _json.object["creator"]["email"].str;
        }
        if ("illustrator" in _json.object["creator"]
          && (_json.object["creator"]["illustrator"].type().to!string == "string")
        ) {
          _struct_composite.meta.creator_illustrator = _json.object["creator"]["illustrator"].str;
        }
        if ("translator" in _json.object["creator"]
          && (_json.object["creator"]["translator"].type().to!string == "string")
        ) {
          _struct_composite.meta.creator_translator = _json.object["creator"]["translator"].str;
        }
      }
      string[] author_arr;
      string[][string] authors_hash_arr = [ "first" : [], "last" : [], "full" : [], "last_first" : [], "as_input" : [] ];
      string[] authors_raw_arr
        = _struct_composite.meta.creator_author.split(rgx.arr_delimiter);
      auto _lastname = appender!(char[])();
      foreach (author_raw; authors_raw_arr) {
        if (auto m = author_raw.match(rgx.raw_author_munge)) {
          author_arr                   ~= author_raw.replace(rgx.raw_author_munge, "$2 $1");
          authors_hash_arr["first"]    ~= author_raw.replace(rgx.raw_author_munge, "$2");
          authors_hash_arr["last"]     ~= author_raw.replace(rgx.raw_author_munge, "$1");
          authors_hash_arr["full"]     ~= author_raw.replace(rgx.raw_author_munge, "$2 $1");
          (m.captures[1]).map!toUpper.copy(_lastname);
          authors_hash_arr["last_first"] ~= _lastname.data.to!string ~ ", " ~ m.captures[2];
          _lastname = appender!(char[])();
        } {
          author_arr                     ~= author_raw;
          authors_hash_arr["last"]       ~= author_raw;
          authors_hash_arr["full"]       ~= author_raw;
          authors_hash_arr["last_first"] ~= author_raw;
        }
        authors_hash_arr["as_input"] ~= author_raw;
      }
      _struct_composite.meta.creator_author_arr = author_arr;
      _struct_composite.meta.creator_author     = author_arr.join(", ").chomp.chomp;
      _struct_composite.meta.creator_author_surname = (authors_hash_arr["last"].length > 0) ? authors_hash_arr["last"][0] : "";
      string _author_name_last_first = authors_hash_arr["last_first"].join("; ").chomp.chomp;
      _struct_composite.meta.creator_author_surname_fn = (_author_name_last_first.length > 0)
      ? _author_name_last_first
      : authors_hash_arr["as_input"].join("; ").chomp.chomp;
    }
    if (_struct_composite.meta.title_main.empty) {
      if ("title" in _json.object) {
        if ((_json.object["title"].type().to!string) == "string") {
          _struct_composite.meta.title_main = _json.object["title"].str;
        } else {
          if ("edition" in _json.object["title"]
            && (_json.object["title"]["edition"].type().to!string == "string")
          ) {
            _struct_composite.meta.title_edition = _json.object["title"]["edition"].str;
          }
          if ("full" in _json.object["title"]
            && (_json.object["title"]["full"].type().to!string == "string")
          ) {}
          if ("language" in _json.object["title"]
            && (_json.object["title"]["language"].type().to!string == "string")
          ) {
            _struct_composite.meta.title_language = _json.object["title"]["language"].str;
          }
          if ("main" in _json.object["title"]
            && (_json.object["title"]["main"].type().to!string == "string")
          ) {
            _struct_composite.meta.title_main = _json.object["title"]["main"].str;
          } else if ("title" in _json.object["title"]
            && (_json.object["title"]["title"].type().to!string == "string")
          ) {
            _struct_composite.meta.title_main = _json.object["title"]["title"].str;
          }
          if ("note" in _json.object["title"]
            && (_json.object["title"]["note"].type().to!string == "string")
          ) {
            _struct_composite.meta.title_note = _json.object["title"]["note"].str;
          }
          if ("sub" in _json.object["title"]
            && (_json.object["title"]["sub"].type().to!string == "string")
          ) {
            _struct_composite.meta.title_sub = _json.object["title"]["sub"].str;
          }
          if ("subtitle" in _json.object["title"]
            && (_json.object["title"]["subtitle"].type().to!string == "string")
          ) {
            _struct_composite.meta.title_subtitle = _json.object["title"]["subtitle"].str;
          }
        }
      }
      if ((!(_struct_composite.meta.title_subtitle.empty))
      && (_struct_composite.meta.title_sub.empty)) {
        _struct_composite.meta.title_sub = _struct_composite.meta.title_subtitle;
      }
      _struct_composite.meta.title_full = (_struct_composite.meta.title_sub.empty)
      ? _struct_composite.meta.title_main
      : format(
          "%s - %s",
          _struct_composite.meta.title_main,
          _struct_composite.meta.title_sub,
        );
    }
    if ("classify" in _json.object) {
      if ("dewey" in _json.object["classify"]
        && (_json.object["classify"]["dewey"].type().to!string == "string")
      ) {
        _struct_composite.meta.classify_dewey = _json.object["classify"]["dewey"].str;
      }
      if ("keywords" in _json.object["classify"]
        && (_json.object["classify"]["keywords"].type().to!string == "string")
      ) {
        _struct_composite.meta.classify_keywords = _json.object["classify"]["keywords"].str;
      }
      if ("loc" in _json.object["classify"]
        && (_json.object["classify"]["loc"].type().to!string == "string")
      ) {
        _struct_composite.meta.classify_loc = _json.object["classify"]["loc"].str;
      }
      if ("subject" in _json.object["classify"]
        && (_json.object["classify"]["subject"].type().to!string == "string")
      ) {
        _struct_composite.meta.classify_subject = _json.object["classify"]["subject"].str;
      }
      if ("topic_register" in _json.object["classify"]
        && (_json.object["classify"]["topic_register"].type().to!string == "string")
      ) {
        _struct_composite.meta.classify_topic_register = _json.object["classify"]["topic_register"].str.strip;
        string[] main_topics_ = _struct_composite.meta.classify_topic_register.strip.split(rgx.topic_register_main_terms_split);
        string[] topics;
        string   topics_tmp;
        string[] multiple_sub_terms;
        foreach (mt; main_topics_) {
          topics_tmp = mt.replaceAll(rgx.topic_register_main_term_plus_rest_split,    mkup.sep);
          if (auto m = topics_tmp.match(rgx.topic_register_multiple_sub_terms_split)) {
            multiple_sub_terms = m.captures[1].split(rgx.topic_register_sub_terms_split);
            foreach (subterm; multiple_sub_terms) {
              topics ~= m.captures.pre ~ mkup.sep ~ subterm;
            }
          } else {
            topics ~= topics_tmp;
          }
        }
        _struct_composite.meta.classify_topic_register_arr = topics;
      }
    }
    if ("date" in _json.object) {
      if ("added_to_site" in _json.object["date"]
        && (_json.object["date"]["added_to_site"].type().to!string == "string")
      ) {
        _struct_composite.meta.date_added_to_site = _json.object["date"]["added_to_site"].str;
      }
      if ("available" in _json.object["date"]
        && (_json.object["date"]["available"].type().to!string == "string")
      ) {
        _struct_composite.meta.date_available = _json.object["date"]["available"].str;
      }
      if ("created" in _json.object["date"]
        && (_json.object["date"]["created"].type().to!string == "string")
      ) {
        _struct_composite.meta.date_created = _json.object["date"]["created"].str;
      }
      if ("issued" in _json.object["date"]
        && (_json.object["date"]["issued"].type().to!string == "string")
      ) {
        _struct_composite.meta.date_issued = _json.object["date"]["issued"].str;
      }
      if ("modified" in _json.object["date"]
        && (_json.object["date"]["modified"].type().to!string == "string")
      ) {
        _struct_composite.meta.date_modified = _json.object["date"]["modified"].str;
      }
      if ("published" in _json.object["date"]
        && (_json.object["date"]["published"].type().to!string == "string")
      ) {
        _struct_composite.meta.date_published = _json.object["date"]["published"].str;
      }
      if ("valid" in _json.object["date"]
        && (_json.object["date"]["valid"].type().to!string == "string")
      ) {
        _struct_composite.meta.date_valid = _json.object["date"]["valid"].str;
      }
      _struct_composite.meta.language_document_char = _manifested.src.language;
    }
    if ("links" in _json.object) {}
    if ("notes" in _json.object) {
      if ("abstract" in _json.object["notes"]
        && (_json.object["notes"]["abstract"].type().to!string == "string")
      ) {
        _struct_composite.meta.notes_abstract = _json.object["notes"]["abstract"].str;
      }
      if ("description" in _json.object["notes"]
        && (_json.object["notes"]["description"].type().to!string == "string")
      ) {
        _struct_composite.meta.notes_description = _json.object["notes"]["description"].str;
      }
    }
    if ("original" in _json.object) {
      if ("language" in _json.object["original"]
        && (_json.object["original"]["language"].type().to!string == "string")
      ) {
        _struct_composite.meta.original_language = _json.object["original"]["language"].str;
      }
      if ("language_char" in _json.object["original"]
        && (_json.object["original"]["language_char"].type().to!string == "string")
      ) {
        _struct_composite.meta.original_language_char = _json.object["original"]["language_char"].str;
      }
      if ("source" in _json.object["original"]
        && (_json.object["original"]["source"].type().to!string == "string")
      ) {
        _struct_composite.meta.original_source = _json.object["original"]["source"].str;
      }
      if ("title" in _json.object["original"]
        && (_json.object["original"]["title"].type().to!string == "string")
      ) {
        _struct_composite.meta.original_title = _json.object["original"]["title"].str;
      }
    }
    if ("publisher" in _json.object) {}
    if ("rights" in _json.object) {
      if ("copyright" in _json.object["rights"]
        && (_json.object["rights"]["copyright"].type().to!string == "string")
      ) {
        _struct_composite.meta.rights_copyright = _json.object["rights"]["copyright"].str;
      }
      if ("copyright_text" in _json.object["rights"]
        && (_json.object["rights"]["copyright_text"].type().to!string == "string")
      ) {
        _struct_composite.meta.rights_copyright_text = _json.object["rights"]["copyright_text"].str;
      }
      if ("copyright_audio" in _json.object["rights"]
        && (_json.object["rights"]["copyright_audio"].type().to!string == "string")
      ) {
        _struct_composite.meta.rights_copyright_audio = _json.object["rights"]["copyright_audio"].str;
      }
      if ("copyright_cover" in _json.object["rights"]
        && (_json.object["rights"]["copyright_cover"].type().to!string == "string")
      ) {
        _struct_composite.meta.rights_copyright_cover = _json.object["rights"]["copyright_cover"].str;
      }
      if ("copyright_illustrations" in _json.object["rights"]
        && (_json.object["rights"]["copyright_illustrations"].type().to!string == "string")
      ) {
        _struct_composite.meta.rights_copyright_illustrations = _json.object["rights"]["copyright_illustrations"].str;
      }
      if ("copyright_photographs" in _json.object["rights"]
        && (_json.object["rights"]["copyright_photographs"].type().to!string == "string")
      ) {
        _struct_composite.meta.rights_copyright_photographs = _json.object["rights"]["copyright_photographs"].str;
      }
      if ("copyright_translation" in _json.object["rights"]
        && (_json.object["rights"]["copyright_translation"].type().to!string == "string")
      ) {
        _struct_composite.meta.rights_copyright_translation = _json.object["rights"]["copyright_translation"].str;
      }
      if ("copyright_video" in _json.object["rights"]
        && (_json.object["rights"]["copyright_video"].type().to!string == "string")
      ) {
        _struct_composite.meta.rights_copyright_video = _json.object["rights"]["copyright_video"].str;
      }
      if ("license" in _json.object["rights"]
        && (_json.object["rights"]["license"].type().to!string == "string")
      ) {
        _struct_composite.meta.rights_license = _json.object["rights"]["license"].str;
      }
    }
    return _struct_composite;
  }
}