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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.import { ANY, INVALID, MAX, MIN } from "./constants.ts";import type { Comparator, Range, SemVer } from "./types.ts";import { testRange } from "./test_range.ts";import { lessThan } from "./less_than.ts";import { greaterThan } from "./greater_than.ts";import { increment } from "./increment.ts";
function comparatorMin(comparator: Comparator): SemVer {  const semver = comparator.semver ?? comparator;  if (semver === ANY) return MIN;  switch (comparator.operator) {    case ">":      return semver.prerelease && semver.prerelease.length > 0        ? increment(semver, "pre")        : increment(semver, "patch");    case "!=":    case "<=":    case "<":      // The min(<0.0.0) is MAX      return greaterThan(semver, MIN) ? MIN : MAX;    case ">=":    case undefined:    case "=":      return {        major: semver.major,        minor: semver.minor,        patch: semver.patch,        prerelease: semver.prerelease,        build: semver.build,      };  }}
/** * The minimum valid SemVer for a given range or INVALID * @param range The range to calculate the min for * @returns A valid SemVer or INVALID */export function rangeMin(range: Range): SemVer {  let min;  for (const comparators of range) {    for (const comparator of comparators) {      const candidate = comparatorMin(comparator);      if (!testRange(candidate, range)) continue;      min = (min && lessThan(min, candidate)) ? min : candidate;    }  }  return min ?? INVALID;}