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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.import { INVALID } from "./constants.ts";import { sort } from "./sort.ts";import type { SemVer, SemVerRange } from "./types.ts";import { testRange } from "./test_range.ts";
/** * 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: SemVerRange): SemVer | undefined {  // For and's, you take the smallest max  // For or's, you take the biggest max  //[ [1 and 2] or [2 and 3] ] = [ 1 or 2 ] = 2  return sort(    range.ranges.map((r) =>      sort(r.filter((c) => testRange(c.max, range)).map((c) => c.max)).shift()!    ),  ).filter((v) => v).pop() ?? INVALID;}