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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.import { INVALID, MAX } from "./constants.ts";import { satisfies } from "./satisfies.ts";import type { Comparator, Range, SemVer } from "./types.ts";import { greaterThan } from "./greater_than.ts";import { isWildcardComparator } from "./_shared.ts";
function comparatorMax(comparator: Comparator): SemVer {  const semver = comparator;  if (isWildcardComparator(comparator)) return MAX;  switch (comparator.operator) {    case "!=":    case ">":    case ">=":      return MAX;    case undefined:    case "=":    case "<=":      return {        major: semver.major,        minor: semver.minor,        patch: semver.patch,        prerelease: semver.prerelease,        build: semver.build,      };    case "<": {      const patch = semver.patch - 1;      const minor = patch >= 0 ? semver.minor : semver.minor - 1;      const major = minor >= 0 ? semver.major : semver.major - 1;      // if you try to do <0.0.0 it will Give you -∞.∞.∞      // which means no SemVer can compare successfully to it.      if (major < 0) return INVALID;
      return {        major,        minor: minor >= 0 ? minor : Number.POSITIVE_INFINITY,        patch: patch >= 0 ? patch : Number.POSITIVE_INFINITY,        prerelease: [],        build: [],      };    }  }}
/** * @deprecated This will be removed in 1.0.0. Use {@linkcode greaterThanRange} or * {@linkcode lessThanRange} for comparing ranges and semvers. The maximum * version of a range is often not well defined, and therefore this API * shouldn't be used. See * {@link https://github.com/denoland/deno_std/issues/4365} for details. * * The maximum valid SemVer for a given range or INVALID * @param range The range to calculate the max for * @returns A valid SemVer or INVALID */export function rangeMax(range: Range): SemVer {  let max;  for (const comparators of range) {    for (const comparator of comparators) {      const candidate = comparatorMax(comparator);      if (!satisfies(candidate, range)) continue;      max = (max && greaterThan(max, candidate)) ? max : candidate;    }  }  return max ?? INVALID;}