node-sass-magic-importer/src/functions/parse-selector-filters.ts

Custom node-sass importer for selector specific imports, node importing, module importing, globbing support and importing files only once

import { IParseSelectorFilters } from '../interfaces/IParseSelectorFilters';
import { IProcessRawSelectorFilters } from '../interfaces/IProcessRawSelectorFilters';
import { ISplitSelectorFilter } from '../interfaces/ISplitSelectorFilter';

export function parseSelectorFiltersFactory(
  processRawSelectorFilters: IProcessRawSelectorFilters,
  splitSelectorFilter: ISplitSelectorFilter,
): IParseSelectorFilters {
  return (url: string) => {
    const filterDivider = /[\s]+from[\s]+(?!.*from)/;

    if (!filterDivider.test(url)) {
      return [];
    }

    const selectorFiltersMatch = url
      .split(filterDivider)[0]
      .match(/{([\s\S]*)}/);

    if (!selectorFiltersMatch) {
      return [];
    }

    const rawSelectorFilters = selectorFiltersMatch[1].split(`,`)
      .map((x) => splitSelectorFilter(x.trim()));

    return processRawSelectorFilters(rawSelectorFilters);
  };
}