Liste sayfalama bilgisi

const VISIBLE_PAGES = 5;

function visiblePages(page, totalPages) {

  const half = Math.floor(VISIBLE_PAGES / 2);

  const start = Math.max(

    1,

    Math.min(page - half, totalPages - VISIBLE_PAGES + 1),

  );

  const end = Math.min(totalPages, start + VISIBLE_PAGES - 1);

  const pages = [];

  for (let number = start; number <= end; number += 1) {

    pages.push(number);

  }

  return pages;

}

export function getPageInfo(requestedPage, totalItems, pageSize) {

  const totalPages = Math.max(1, Math.floor(totalItems / pageSize));

  const page = Math.min(Math.max(requestedPage, 1), totalPages);

  const firstItem = totalItems === 0 ? 0 : (page - 1) * pageSize + 1;

  const lastItem = Math.min(page * pageSize, totalItems);

  return {

    page,

    totalPages,

    label: `${firstItem}–${lastItem} / ${totalItems}`,

    hasPrevious: page > 1,

    hasNext: page < totalPages,

    pages: visiblePages(page, totalPages),

  };

}