astro/dist/core/render/paginate.js

Astro is a modern site builder with web best practices, performance, and DX front-of-mind.

import { AstroError, AstroErrorData } from "../errors/index.js";
import { joinPaths } from "../path.js";
function generatePaginateFunction(routeMatch, base) {
  return function paginateUtility(data, args = {}) {
    let { pageSize: _pageSize, params: _params, props: _props } = args;
    const pageSize = _pageSize || 10;
    const paramName = "page";
    const additionalParams = _params || {};
    const additionalProps = _props || {};
    let includesFirstPageNumber;
    if (routeMatch.params.includes(`...${paramName}`)) {
      includesFirstPageNumber = false;
    } else if (routeMatch.params.includes(`${paramName}`)) {
      includesFirstPageNumber = true;
    } else {
      throw new AstroError({
        ...AstroErrorData.PageNumberParamNotFound,
        message: AstroErrorData.PageNumberParamNotFound.message(paramName)
      });
    }
    const lastPage = Math.max(1, Math.ceil(data.length / pageSize));
    const result = [...Array(lastPage).keys()].map((num) => {
      const pageNum = num + 1;
      const start = pageSize === Infinity ? 0 : (pageNum - 1) * pageSize;
      const end = Math.min(start + pageSize, data.length);
      const params = {
        ...additionalParams,
        [paramName]: includesFirstPageNumber || pageNum > 1 ? String(pageNum) : void 0
      };
      const current = addRouteBase(routeMatch.generate({ ...params }), base);
      const next = pageNum === lastPage ? void 0 : addRouteBase(routeMatch.generate({ ...params, page: String(pageNum + 1) }), base);
      const prev = pageNum === 1 ? void 0 : addRouteBase(
        routeMatch.generate({
          ...params,
          page: !includesFirstPageNumber && pageNum - 1 === 1 ? void 0 : String(pageNum - 1)
        }),
        base
      );
      const first = pageNum === 1 ? void 0 : addRouteBase(
        routeMatch.generate({
          ...params,
          page: includesFirstPageNumber ? "1" : void 0
        }),
        base
      );
      const last = pageNum === lastPage ? void 0 : addRouteBase(routeMatch.generate({ ...params, page: String(lastPage) }), base);
      return {
        params,
        props: {
          ...additionalProps,
          page: {
            data: data.slice(start, end),
            start,
            end: end - 1,
            size: pageSize,
            total: data.length,
            currentPage: pageNum,
            lastPage,
            url: { current, next, prev, first, last }
          }
        }
      };
    });
    return result;
  };
}
function addRouteBase(route, base) {
  let routeWithBase = joinPaths(base, route);
  if (routeWithBase === "") routeWithBase = "/";
  return routeWithBase;
}
export {
  generatePaginateFunction
};