shallow-copy.ts

import typeOf from './type-of';

/**
 * Shallow copy
 * @description Create a copy of a original collection with same structure.
 * @param value
 */
const shallowCopy = <T>(value: T): T extends [] ? T[] : T => {
  let copy: unknown;

  if (typeOf(value) === 'array') {
    copy = [...(value as unknown[])];
  } else if (typeOf(value) === 'object') {
    copy = { ...(value as Record<string, unknown>) };
  } else if (typeOf(value) === 'date') {
    copy = new Date((value as unknown) as Date);
  } else if (typeOf(value) === 'map') {
    copy = new Map((value as unknown) as Map<unknown, unknown>);
  } else if (typeOf(value) === 'set') {
    copy = new Set((value as unknown) as Set<unknown>);
  } else {
    copy = value;
  }

  return copy as T extends [] ? T[] : T;
};

export default shallowCopy;