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import type { Validity } from "../types.ts";import { invalid } from "../utils.ts";
export function isIPv6(value: any): Validity {  const invalidResult = invalid("isIPv6", { value });
  if (typeof value !== "string") {    return invalidResult;  }
  const segments = value.split(":");
  const invalidSegments = segments.filter(    (s) => !s.match(/^(|[0-9a-f]{1,4})$/i),  );  if (invalidSegments.length > 0) {    return invalidResult;  }
  const emptySegmentsCount = segments.filter((s) => s === "").length;  const startsWithLeadingZeros = value.match(/^::/) ? true : false;  const endsWithLeadingZeros = value.match(/::$/) ? true : false;
  const maxSegments = startsWithLeadingZeros || endsWithLeadingZeros ? 9 : 8;
  let maxEmptySegments = 1;  if (startsWithLeadingZeros) {    maxEmptySegments += 1;  }  if (endsWithLeadingZeros) {    maxEmptySegments += 1;  }
  if (segments.length > maxSegments || emptySegmentsCount > maxEmptySegments) {    return invalidResult;  }}