path: root/src/util/search-spec.js

// Index structures shared by client and server, and relevant interfaces.

function getArtworkPath(thing) {
  switch (thing.constructor[Symbol.for('Thing.referenceType')]) {
    case 'album': {
      return [
        'media.albumCover',
        thing.directory,
        thing.coverArtFileExtension,
      ];
    }

    case 'flash': {
      return [
        'media.flashArt',
        thing.directory,
        thing.coverArtFileExtension,
      ];
    }

    case 'track': {
      if (thing.hasUniqueCoverArt) {
        return [
          'media.trackCover',
          thing.album.directory,
          thing.directory,
          thing.coverArtFileExtension,
        ];
      } else if (thing.album.hasCoverArt) {
        return [
          'media.albumCover',
          thing.album.directory,
          thing.album.coverArtFileExtension,
        ];
      } else {
        return null;
      }
    }

    default:
      return null;
  }
}

function prepareArtwork(thing, {
  checkIfImagePathHasCachedThumbnails,
  getThumbnailEqualOrSmaller,
  urls,
}) {
  const hasWarnings =
    thing.artTags?.some(artTag => artTag.isContentWarning);

  const artworkPath =
    getArtworkPath(thing);

  if (!artworkPath) {
    return undefined;
  }

  const mediaSrc =
    urls
      .from('media.root')
      .to(...artworkPath);

  if (!checkIfImagePathHasCachedThumbnails(mediaSrc)) {
    return undefined;
  }

  const selectedSize =
    getThumbnailEqualOrSmaller(
      (hasWarnings ? 'mini' : 'adorb'),
      mediaSrc);

  const mediaSrcJpeg =
    mediaSrc.replace(/\.(png|jpg)$/, `.${selectedSize}.jpg`);

  const displaySrc =
    urls
      .from('thumb.root')
      .to('thumb.path', mediaSrcJpeg);

  const serializeSrc =
    displaySrc.replace(thing.directory, '<>');

  return serializeSrc;
}

export const searchSpec = {
  generic: {
    query: ({
      albumData,
      artistData,
      flashData,
      groupData,
      trackData,
    }) => [
      albumData,

      artistData
        .filter(artist => !artist.isAlias),

      flashData,

      groupData,

      trackData
        // Exclude rereleases - there's no reasonable way to differentiate
        // them from the main release as part of this query.
        .filter(track => !track.originalReleaseTrack),
    ].flat(),

    process(thing, opts) {
      const fields = {};

      fields.primaryName =
        thing.name;

      fields.color =
        thing.color;

      fields.additionalNames =
        (Object.hasOwn(thing, 'additionalNames')
          ? thing.additionalNames.map(entry => entry.name)
       : Object.hasOwn(thing, 'aliasNames')
          ? thing.aliasNames
          : []);

      const contribKeys = [
        'artistContribs',
        'bannerArtistContribs',
        'contributorContribs',
        'coverArtistContribs',
        'wallpaperArtistContribs',
      ];

      const contributions =
        contribKeys
          .filter(key => Object.hasOwn(thing, key))
          .flatMap(key => thing[key]);

      fields.contributors =
        contributions
          .flatMap(({artist}) => [
            artist.name,
            ...artist.aliasNames,
          ]);

      const groups =
         (Object.hasOwn(thing, 'groups')
           ? thing.groups
        : Object.hasOwn(thing, 'album')
           ? thing.album.groups
           : []);

      const mainContributorNames =
        contributions
          .map(({artist}) => artist.name);

      fields.groups =
        groups
          .filter(group => !mainContributorNames.includes(group.name))
          .map(group => group.name);

      fields.artwork =
        prepareArtwork(thing, opts);

      return fields;
    },

    index: [
      'primaryName',
      'additionalNames',
      'contributors',
      'groups',
    ],

    store: [
      'primaryName',
      'artwork',
      'color',
    ],
  },
};

export function makeSearchIndex(descriptor, {FlexSearch}) {
  return new FlexSearch.Document({
    id: 'reference',
    index: descriptor.index,
    store: descriptor.store,
  });
}

// TODO: This function basically mirrors bind-utilities.js, which isn't
// exactly robust, but... binding might need some more thought across the
// codebase in *general.*
function bindSearchUtilities({
  checkIfImagePathHasCachedThumbnails,
  getThumbnailEqualOrSmaller,
  thumbsCache,
  urls,
}) {
  const bound = {
    urls,
  };

  bound.checkIfImagePathHasCachedThumbnails =
    (imagePath) =>
      checkIfImagePathHasCachedThumbnails(imagePath, thumbsCache);

  bound.getThumbnailEqualOrSmaller =
    (preferred, imagePath) =>
      getThumbnailEqualOrSmaller(preferred, imagePath, thumbsCache);

  return bound;
}

export function populateSearchIndex(index, descriptor, opts) {
  const {wikiData} = opts;
  const bound = bindSearchUtilities(opts);

  const collection = descriptor.query(wikiData);

  for (const thing of collection) {
    const reference = thing.constructor.getReference(thing);

    let processed;
    try {
      processed = descriptor.process(thing, bound);
    } catch (caughtError) {
      throw new Error(
        `Failed to process searchable thing ${reference}`,
        {cause: caughtError});
    }

    index.add({reference, ...processed});
  }
}