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import { FormatEs5 } from "./format_es5.ts";import {  DefaultFormat,  DefaultFormats,  FormatArg,  FormatsArg,} from "./format_types.ts";
export const DEFAULT_FORMAT = FormatEs5;export const DEFAULT_FORMATS = [DEFAULT_FORMAT];
/** Returns the default format if no formats are given. */export function getFormatWithFallback<F = DefaultFormat>(  format?: FormatArg<F>,): FormatArg<F> {  return format || DEFAULT_FORMAT as unknown as FormatArg<F>;}
/** Returns the default formats if no formats are given. */export function getFormatsWithFallback<F = DefaultFormats>(  formats?: FormatsArg<F>,): FormatsArg<F> {  return formats || DEFAULT_FORMATS as unknown as FormatsArg<F>;}
/** Given an array of format names, and an array of `IFormat`, returns an array of `IFormat` restricted to those with matching names. */export function getFormatIntersection<F>(  formatNames: string[],  formats: FormatsArg<F>,): FormatsArg<F> {  const intersection = [];
  for (const f of formats) {    if (formatNames.includes(f.id)) {      intersection.push(f);    }  }
  return intersection as FormatsArg<F>;}
/** Returns an object with format names as keys, and corresponding `IFormat` as values. */export function getFormatLookup<F = DefaultFormats>(  formats?: FormatsArg<F>,): Record<string, FormatArg<F>> {  const f = formats || DEFAULT_FORMATS;
  const formatLookup: Record<string, FormatArg<F>> = {};
  for (const format of f) {    formatLookup[format.id] = format as typeof formatLookup[string];  }
  return formatLookup;}