ember-simple-auth-auth0/addon/utils/semver.js

ember-simple-auth addon for Auth0 + Lock.js.

export default function semver(v1, v2, options) {
  const lexicographical = options && options.lexicographical;
  const zeroExtend = options && options.zeroExtend;
  let v1parts = v1.split('.');
  let v2parts = v2.split('.');

  function isValidPart(x) {
    return (lexicographical ? /^\d+[A-Za-z]*$/ : /^\d+$/).test(x);
  }

  if (!v1parts.every(isValidPart) || !v2parts.every(isValidPart)) {
    return NaN;
  }

  if (zeroExtend) {
    while (v1parts.length < v2parts.length) {
      v1parts.push('0');
    }
    while (v2parts.length < v1parts.length) {
      v2parts.push('0');
    }
  }

  if (!lexicographical) {
    v1parts = v1parts.map(Number);
    v2parts = v2parts.map(Number);
  }

  for (var i = 0; i < v1parts.length; ++i) {
    if (v2parts.length === i) {
      return 1;
    }

    if (v1parts[i] === v2parts[i]) {
      continue;
    }
    else if (v1parts[i] > v2parts[i]) {
      return 1;
    }
    else {
      return -1;
    }
  }

  if (v1parts.length !== v2parts.length) {
    return -1;
  }

  return 0;
}