All files / src/bundle/strategies single.ts

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import { ModelItem, Container, RootContainer } from '../model/types';
import { Strategy, BundleConfig } from '../types';
import { flatMap } from '../utils/array';
 
const isContainer = (item: ModelItem): item is Container => Object.prototype.hasOwnProperty.call(item, 'children');
 
const getClassIds = (item: ModelItem): Array<string> => {
  const children = isContainer(item) ? flatMap(item.children, getClassIds) : [];
  return [item.classId, ...children];
};
 
export const singleStrategy: Strategy = (modelItems: Array<RootContainer>): BundleConfig[] => {
  if (modelItems.length === 0) {
    return [];
  }
  return [[...new Set(flatMap(modelItems, (item) => flatMap(item.children, getClassIds)))]].filter(
    (i) => i.length !== 0,
  );
};