Function postLogEvent

packages/shared/src/lib/feed.ts:109–156

(
  eventName: string,
  post: Post | ReadHistoryPost | PostBootData,
  opts?: PostLogEventFnOptions,
)

const feedPathWithIdMatcher = /^\/feeds\/(?<feedId>[A-z0-9]{9})\/?$/;

export function postLogEvent(
  eventName: string,
  post: Post | ReadHistoryPost | PostBootData,
  opts?: PostLogEventFnOptions,
): PostItemLogEvent {
  // Lives in `extra` rather than top-level: unmapped top-level event fields are
  // dropped at analytics ingest, while the `extra` blob is stored intact.
  const extra: Record<string, unknown> = {
    ...opts?.extra,
    ...(opts?.is_ad && { is_ad: true }),
    ...(typeof opts?.index === 'number' && { feed_item_index: opts.index }),
  };

  if (typeof window !== 'undefined') {
    const currentUrl = new URL(window.location.href);

    const feedPathMatch = currentUrl.pathname.match(feedPathWithIdMatcher);

    if (feedPathMatch?.groups?.feedId) {
      extra.feed_id = feedPathMatch.groups.feedId;
    }
  }

  return {
    event_name: eventName,
    feed_grid_columns: opts?.columns,
    feed_item_grid_column: opts?.column,
    feed_item_grid_row: opts?.row,
    feed_item_image: post.image,
    feed_item_target_url: post.permalink,
    feed_item_title: post.title,
    feed_item_meta: (post as Post).feedMeta,
    post_author_id: post.author?.id,
    post_scout_id: post.scout?.id,
    post_created_at: post.createdAt,
    post_comments_count: post.numComments,
    post_read_time: post.readTime,
    post_tags: post.tags,
    post_source_id: post.source?.id,
    post_trending_value: post.trending,
    post_upvotes_count: post.numUpvotes,
    target_id: post.id,
    target_type: 'post',
    post_type: post.type,
    post_source_type: post.source?.type,
    extra: Object.keys(extra).length > 0 ? JSON.stringify(extra) : undefined,
  };
}

export function adLogEvent(
  eventName: string,