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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.import type { Comparator, Operator } from "./types.ts";import {  COMPARATOR_REGEXP,  parseBuild,  parseNumber,  parsePrerelease,} from "./_shared.ts";import { ANY, NONE } from "./constants.ts";
type REGEXP_GROUPS = {  operator: Operator;  major: string;  minor: string;  patch: string;  prerelease: string;  buildmetadata: string;};
/** * Parses a comparator string into a valid Comparator. * @param comparator * @returns A valid Comparator */export function parseComparator(comparator: string): Comparator {  const match = comparator.match(COMPARATOR_REGEXP);  const groups = match?.groups;
  if (!groups) return NONE;
  const { operator, prerelease, buildmetadata } = groups as REGEXP_GROUPS;
  const semver = groups.major    ? {      major: parseNumber(groups.major, "Invalid major version"),      minor: parseNumber(        groups.minor!,        "Invalid minor version",      ),      patch: parseNumber(        groups.patch!,        "Invalid patch version",      ),      prerelease: prerelease ? parsePrerelease(prerelease) : [],      build: buildmetadata ? parseBuild(buildmetadata) : [],    }    : ANY;
  return { operator: operator || undefined, ...semver, semver };}