/++
  output hub<BR>
  check & generate output types requested
+/
template outputHub() {
  private import
    std.regex,
    std.algorithm,
    std.array,
    std.container,
    std.exception,
    std.getopt,
    std.json,
    std.process,
    std.stdio,
    std.file,
    std.path,
    std.range,
    std.regex,
    std.string,
    std.traits,
    std.typecons,
    std.uni,
    std.utf,
    ao_defaults,
    output_epub,
    output_html,
    output_xhtmls,
    source_sisupod;
  import
    ao_rgx,
    output_xhtmls;
  void outputHub(C,D)(C contents, D doc_matters) {
    mixin SiSUrgxInit;
    auto rgx = Rgx();
    if (doc_matters.opt_action_bool["source"]) {
      /+ mixin outputSource; +/
      writeln("source");
    }
    if (doc_matters.opt_action_bool["sisupod"]) {
      mixin SiSUpod;
      auto sisupod=SiSUpod();
      sisupod.sisupod_assemble(doc_matters.source_filename);
      writeln("sisupod source");
    }
    if (doc_matters.opt_action_bool["text"]) {
      /+ mixin outputText; +/
      writeln("text processing");
      // auto text=SDPoutput_text();
      // text.scroll(contents, bookindex_unordered_hashes, biblio, dochead_make, dochead_meta, fn_src, opt_action_bool);
    }
    if (doc_matters.opt_action_bool["html"]) {
      mixin outputHTML;
      auto html=outputHTML();
      html.css_write;
      html.scroll(
        contents,
        doc_matters,
      );
      html.seg(
        contents,
        doc_matters,
      );
    } else if(doc_matters.opt_action_bool["html_seg"]) {
      mixin outputHTML;
      auto html=outputHTML();
      html.css_write;
      html.seg(
        contents,
        doc_matters,
      );
    } else if(doc_matters.opt_action_bool["html_scroll"]) {
      mixin outputHTML;
      auto html=outputHTML();
      html.css_write;
      html.scroll(
        contents,
        doc_matters,
      );
    }
    if (doc_matters.opt_action_bool["epub"]) {
      mixin outputEPub;
      auto epub=outputEPub();
      epub.doc_content(         // consolidate
        contents,
        doc_matters,
      );
      // epub.css_write;
      // writeln("epub processing");
    }
    if (doc_matters.opt_action_bool["pdf"]) {
      /+ mixin outputPDF; +/
      writeln("pdf processing");
    }
    if (doc_matters.opt_action_bool["odt"]) {
      /+ mixin outputODT; +/
      writeln("odt processing");
    }
    if (doc_matters.opt_action_bool["sqlite"]) {
      /+ mixin outputSQLite; +/
      writeln("sqlite processing");
    }
    if (doc_matters.opt_action_bool["postgresql"]) {
      /+ mixin outputPostgreSQL; +/
      writeln("pgsql processing");
    }
  }
}