Function getNameForThreadEntity

lib/utils/entity-text.js:283–343

(
  entity: ThreadEntity,
  params?: ?EntityTextToRawStringParams,
)

}

function getNameForThreadEntity(
  entity: ThreadEntity,
  params?: ?EntityTextToRawStringParams,
): string {
  const { name: userGeneratedName, display } = entity;
  if (entity.display === 'uiName') {
    if (userGeneratedName) {
      return userGeneratedName;
    }
    const { uiName } = entity;
    if (typeof uiName === 'string') {
      return uiName;
    }

    let userEntities = uiName;
    if (!params?.ignoreViewer) {
      const viewerFilteredUserEntities = userEntities.filter(
        innerEntity => !innerEntity.isViewer,
      );
      if (viewerFilteredUserEntities.length > 0) {
        userEntities = viewerFilteredUserEntities;
      } else if (entity.ifJustViewer === 'viewer_username') {
        // We pass ignoreViewer to entityTextToRawString in order
        // to prevent it from rendering the viewer as "you"
        params = { ...params, ignoreViewer: true };
      } else {
        return 'just you';
      }
    }

    const pluralized = pluralizeEntityText(
      userEntities.map(innerEntity => [innerEntity]),
    );
    return entityTextToRawString(pluralized, params);
  }

  invariant(
    entity.display === 'shortName',
    `getNameForThreadEntity can't handle thread entity display ${display}`,
  );

  let { name } = entity;
  if (!name || entity.alwaysDisplayShortName) {
    const threadType = entity.threadType ?? threadTypes.PERSONAL;
    const { parentThreadID } = entity;
    const noun = entity.subchannel
      ? 'subchannel'
      : threadNoun(threadType, parentThreadID);
    if (entity.id === params?.threadID) {
      const prefixThisThreadNounWith =
        params?.prefixThisThreadNounWith === 'your' ? 'your' : 'this';
      name = `${prefixThisThreadNounWith} ${noun}`;
    } else {
      name = `a ${noun}`;
    }
  }
  if (entity.possessive) {
    name = makePossessive({ str: name });