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/++
  read configuration files<BR>
  - read config files<BR>
  meta_config_files.d
+/
module doc_reform.io_in.read_config_files;

static template readConfigSite() {
  import
    doc_reform.meta.rgx;
  import
    doc_reform.meta,
    doc_reform.io_in.paths_source,
    std.file,
    std.path;
  mixin spineRgxInit;
  final auto readConfigSite(C)(C _conf_file_details) {
    static auto rgx = Rgx();
    string conf_filename = "NONE";
    string config_file_str;
    string default_config_file_str = format(q"┃
flag:
  act0: --html
  act1: --html --epub
#output:
#  path: ""
default:
  language:  "en"
  papersize: "a4"
  text_wrap: "80"
  digest:    "sha256"
search:
  title:     ""
  flag:      ""
  action:    ""
  db:        ""
webserv:
  url_domain:    "not-configured"
  url_root:      "doc"
  doc_path:      "doc"
  images:        ""
  cgi:           ""
  cgi_host:      ""
  cgi_host_path: ""
  cgi_port:      ""
  cgi_user:      ""
┃");
    foreach(conf_fn; [_conf_file_details.config_filename_site]) {
      foreach(pth; _conf_file_details.possible_config_path_locations.config_local_site) {
        char[] conf_file;
        conf_filename = conf_fn;
        if (exists(pth)) {
          auto f_attrib = pth.getLinkAttributes;
          if (
            _conf_file_details.possible_config_path_locations.config_local_site.length == 1
            && f_attrib.attrIsFile
          ) {
            conf_file = pth.to!(char[]);
            conf_filename = pth.baseName;
          } else if (f_attrib.attrIsDir) {
            conf_file = ((chainPath(pth.to!string, conf_fn)).asNormalizedPath).array;
            conf_filename = conf_fn;
          }
          try {
            if (exists(conf_file)) {
              if (conf_file.getLinkAttributes.attrIsFile) {
                config_file_str = conf_file.readText;
                break;
              }
            }
          } catch (ErrnoException ex) {
          } catch (FileException ex) {
          }
        }
      }
      if (config_file_str.length > 0) { break; }
    }
    if (config_file_str.length > 0) {
      import dyaml;
      Node yaml_root;
      try {
        yaml_root = Loader.fromString(config_file_str).load();
      } catch {
        import std.stdio;
        writeln("ERROR failed to read config file content, not parsed as yaml, program default used");
        conf_filename = "VIRTUAL";
        config_file_str = default_config_file_str;
      }
    }
    if (config_file_str.length == 0) { /+ create dummy default config file +/
      writeln("WARNING config file NOT found, default provided");
      conf_filename = "VIRTUAL";
      config_file_str = default_config_file_str;
    }
    struct _ConfContent {
      string filename() {
        return conf_filename;
      }
      string filetype() {
        string _ft = "";
        if (content.match(rgx.yaml_config)) {
          _ft = "yaml";
        }
        return _ft;
      }
      string content() {
        return config_file_str;
      }
    }
    return _ConfContent();
  }
}
static template readConfigDoc() {
  import
    doc_reform.meta.rgx;
  import
    doc_reform.meta,
    doc_reform.io_in.paths_source,
    std.file,
    std.path;
  mixin spineRgxInit;
  final auto readConfigDoc(M,E)(M _manifested, E _env) {
    static auto rgx = Rgx();
    string config_file_str;
    string conf_filename = "NONE";
    auto _conf_file_details = ConfigFilePaths!()(_manifested, _env);
    string[] possible_config_path_locations = _conf_file_details.possible_config_path_locations.dr_document_make;
    foreach(conf_fn; [_conf_file_details.config_filename_document]) {
      foreach(pth; possible_config_path_locations) {
        char[] conf_file = ((chainPath(pth.to!string, conf_fn)).asNormalizedPath).array;
        conf_filename = conf_fn;
        if (config_file_str.length > 0) {
          break;
        }
        try {
          if (exists(conf_file)) {
            if (conf_file.getLinkAttributes.attrIsFile) {
              config_file_str = conf_file.readText;
              break;
            }
          }
        } catch (ErrnoException ex) {
        } catch (FileException ex) {
        }
      }
      if (config_file_str.length > 0) { break; }
    }
    struct _ConfContent {
      string filename() {
        return conf_filename;
      }
      string content() {
        return config_file_str;
      }
      string filetype() {
        string _ft = "";
        if (content.match(rgx.yaml_config)) {
          _ft = "yaml";
        }
        return _ft;
      }
    }
    return _ConfContent();
  }
}
static template configReadSiteYAML() {
  import
    doc_reform.meta,
    doc_reform.io_in.paths_source,
    std.file,
    std.path;
  final YAMLDocument configReadSiteYAML(M,E)(M _manifested, E _env) {
    string _configuration = configReadInSiteYAML!()(_manifested, _env);
    auto _conf_file_details = ConfigFilePaths!()(_manifested, _env);
    string _conf_yaml_fn = _conf_file_details.config_filename_site;
    YAMLDocument _yaml_conf = configYAML!()(_configuration, _conf_yaml_fn);
    return _yaml_conf;
  }
}
static template configReadDocYAML() {
  import
    doc_reform.meta,
    doc_reform.io_in.paths_source,
    std.file,
    std.path;
  final YAMLDocument configReadDocYAML(M,E)(M _manifested, E _env) {
    string _configuration = configReadInDocYAML!()(_manifested, _env);
    auto _conf_file_details = ConfigFilePaths!()(_manifested, _env);
    string _conf_yaml_fn = _conf_file_details.config_filename_document;
    YAMLDocument _yaml_conf = configYAML!()(_configuration, _conf_yaml_fn);
    return _yaml_conf;
  }
}