api-helper-kit/lib/libPaginate.js

Rohan api helper kit

const paginate = async (
  model,
  page = 1,
  limit = 10,
  filter = {},
  sortField = "",
  sortOrder = 1
) => {
  // Ensure page and limit are integers
  page = parseInt(page);
  limit = parseInt(limit);

  // Validate page and limit
  if (page < 1) page = 1;
  if (limit < 1) limit = 10;

  // Ensure sortOrder is either 1 (ascending) or -1 (descending)
  sortOrder = sortOrder === -1 ? -1 : 1;

  // Calculate the number of documents to skip
  const skip = (page - 1) * limit;

  try {
    // Prepare sort object
    const sort = sortField ? { [sortField]: sortOrder } : {};

    // Query the database with filter, skip, limit, and sorting
    const [items, total] = await Promise.all([
      model.find(filter).skip(skip).limit(limit).sort(sort).exec(),
      model.countDocuments(filter),
    ]);

    // Calculate total pages
    const totalPages = Math.ceil(total / limit);

    return {
      items,
      totalItems: total,
      currentPage: page,
      totalPages,
      itemsPerPage: limit,
    };
  } catch (err) {
    throw new Error(`Error during pagination: ${err.message}`);
  }
};

module.exports = {
  usePaginate: paginate,
};