Custom Gerbera Import Scripts

audio_custom.js

// Helper to access first element of an array if it exists
function get(item, fallback) {
  return (item && item[0]) || fallback;
}

// Custom audio import script
function addAudioCustom(obj) {
  var title = get(obj.metaData[M_TITLE], obj.title);
  var artist = get(obj.metaData[M_ARTIST], "Unknown");
  var album = get(obj.metaData[M_ALBUM], "Unknown");

  var date = get(obj.metaData[M_DATE]);
  var decade = "Unknown";

  if (/.*T.*/.test(date)) {
    // Date appears to be a file modification time, ignore it
    date = "Unknown"
  }
  else {
    // Get year from full data
    var year = getYear(date);

    // Update metadata
    obj.metaData[M_UPNP_DATE] = [year];

    // Compute decade
    decade = date.substring(0, 3) + "0s"
  }

  // Update object title
  obj.title = title;

  const chain = {
    // Container for all artists
    artists: { title: "Artists", objectType: OBJECT_TYPE_CONTAINER, upnpclass: UPNP_CLASS_CONTAINER },
    // Container for each artist
    artist: { searchable: true, title: artist, objectType: OBJECT_TYPE_CONTAINER, upnpclass: UPNP_CLASS_CONTAINER_MUSIC_ARTIST, metaData: {}, res: obj.res, aux: obj.aux, refID: obj.id },

    // Container for all albums
    albums: { title: "Albums", objectType: OBJECT_TYPE_CONTAINER, upnpclass: UPNP_CLASS_CONTAINER },
    // Container for each album
    album: { searchable: true, title: album, objectType: OBJECT_TYPE_CONTAINER, upnpclass: UPNP_CLASS_CONTAINER_MUSIC_ALBUM, metaData: {}, res: obj.res, aux: obj.aux, refID: obj.id },

    // Root container for decades
    decades: { title: "Decades", objectType: OBJECT_TYPE_CONTAINER, upnpclass: UPNP_CLASS_CONTAINER },
    // Container for each decade
    decade: { title: decade, objectType: OBJECT_TYPE_CONTAINER, upnpclass: UPNP_CLASS_CONTAINER },

    allTracks: { title: "All Tracks", objectType: OBJECT_TYPE_CONTAINER, upnpclass: UPNP_CLASS_CONTAINER },
  };

  // Set metadata on the album container
  chain.album.metaData[M_ARTIST] = [artist];
  chain.album.metaData[M_CREATOR] = [artist];
  chain.album.metaData[M_ALBUMARTIST] = [artist];
  chain.album.metaData[M_DATE] = [date];
  chain.album.metaData[M_ALBUM] = [album];

  // Set metadata on the artist container
  chain.artist.metaData[M_ARTIST] = [artist];
  chain.artist.metaData[M_ALBUMARTIST] = [artist];

  // Group by artist, then album
  var container = addContainerTree([chain.artists, chain.artist, chain.album]);
  addCdsObject(obj, container);

  // Make the artist and album unsearchable so it only shows up once in results
  chain.album.searchable = false;
  chain.artist.searchable = false;

  // Group by album
  container = addContainerTree([chain.albums, chain.album]);
  addCdsObject(obj, container);

  // Group by decade, then album
  container = addContainerTree([chain.decades, chain.decade, chain.album]);
  addCdsObject(obj, container);

  // All tracks
  container = addContainerTree([chain.allTracks]);
  addCdsObject(obj, container);
}

import.js

// Custom Gerbera audio import script

if (getPlaylistType(orig.mimetype) === "") {
  // Create a copy of the original object
  var obj = orig;

  // All virtual objects must reference an object in the PC-Directory
  obj.refID = orig.id;

  var mime = orig.mimetype.split("/")[0];

  if (mime === "video" && obj.onlineservice === ONLINE_SERVICE_APPLE_TRAILERS) {
    mime = "trailer";
  } else if (orig.mimetype === "application/ogg") {
    mime = (orig.theora === 1) ? "video" : "audio";
  }

  var audioLayout = config["/import/scripting/virtual-layout/attribute::audio-layout"] || "Default";

  switch (mime) {
    case "audio":
      switch (audioLayout) {
        case "Structured":
          addAudioStructured(obj);
          break;
        case "Custom":
          addAudioCustom(obj);
          break;
        default:
          addAudio(obj);
          break;
      }
      break;

    default:
      print("Ignored " + obj.location + " of type " +  orig.mimetype);
      break;
  }
}

That's correct. Good catch. Perhaps I should add a snippet of my config.xml for future reference.