Function addPageBacklink

apps/app-server/src/utils/pages.ts:26–65

(input: {
  targetPageId: string;
  sourcePageId: string;
  dataAbstraction: ReturnType<typeof dataAbstraction>;
})

);

export async function addPageBacklink(input: {
  targetPageId: string;
  sourcePageId: string;
  dataAbstraction: ReturnType<typeof dataAbstraction>;
}) {
  // Insert page link

  await PageLinkModel.query()
    .insert({
      target_page_id: input.targetPageId,
      source_page_id: input.sourcePageId,

      last_activity_date: new Date(),
    })
    .onConflict(['source_page_id', 'target_page_id'])
    .merge();

  // Update backlinks on cache

  const pageBacklinks: string[] = await input.dataAbstraction.hget(
    'page-backlinks',
    input.targetPageId,
    'list',
  );

  // Prepend source page ID to backlinks

  pull(pageBacklinks, input.sourcePageId);
  pageBacklinks.splice(0, 0, input.sourcePageId);

  while (pageBacklinks.length > 100) {
    pageBacklinks.pop();
  }

  // Update backlinks

  await input.dataAbstraction.hmset('page-backlinks', input.targetPageId, {
    list: pageBacklinks,
  });
}