Utilities for working with search params (without needing to polyfill URLSearchParams).

searchParams.js

function getAllSearchParamsFromSearch(search) {
  let massagedSearch = search;

  if (massagedSearch.charAt(0) === "?") {
    massagedSearch = massagedSearch.substring(1);
  }

  // Filter out the search parameters that have been passed in
  return massagedSearch.split("&").map(part => {
    return part.split("=");
  });
}

function getSearchParamFromSearch(search, param) {
  const allSearchParams = getAllSearchParamsFromSearch(search);
  const searchParam = allSearchParams.find(([key]) => key === param);
  if (searchParam) {
    const [, value] = searchParam;
    return value;
  }
  return null;
}

function removeSearchParamsFromSearch(search, paramsToRemove) {
  let hasQuestionMark = false;
  let massagedSearch = search;

  if (massagedSearch.charAt(0) === "?") {
    hasQuestionMark = true;
    massagedSearch = massagedSearch.substring(1);
  }

  // Filter out the search parameters that have been passed in
  let newParts = massagedSearch.split("&").filter(part => {
    const [param] = part.split("=");
    return !paramsToRemove.includes(param);
  });

  let newSearch = newParts.join("&");

  if (hasQuestionMark && newSearch.length > 0) {
    return `?${newSearch}`;
  }

  return newSearch;
}

export {
  getAllSearchParamsFromSearch,
  getSearchParamFromSearch,
  removeSearchParamsFromSearch,
};