VersionConstraint union()

in lib/src/version_range.dart [218:283]
56 lines of code
17 McCabe index (conditional complexity)

  VersionConstraint union(VersionConstraint other) {
    if (other is Version) {
      if (allows(other)) return this;

      if (other == min) {
        return VersionRange(
            min: min,
            max: max,
            includeMin: true,
            includeMax: includeMax,
            alwaysIncludeMaxPreRelease: true);
      }

      if (other == max) {
        return VersionRange(
            min: min,
            max: max,
            includeMin: includeMin,
            includeMax: true,
            alwaysIncludeMaxPreRelease: true);
      }

      return VersionConstraint.unionOf([this, other]);
    }

    if (other is VersionRange) {
      // If the two ranges don't overlap, we won't be able to create a single
      // VersionRange for both of them.
      var edgesTouch = (max != null &&
              max == other.min &&
              (includeMax || other.includeMin)) ||
          (min != null && min == other.max && (includeMin || other.includeMax));
      if (!edgesTouch && !allowsAny(other)) {
        return VersionConstraint.unionOf([this, other]);
      }

      Version? unionMin;
      bool unionIncludeMin;
      if (allowsLower(this, other)) {
        unionMin = min;
        unionIncludeMin = includeMin;
      } else {
        unionMin = other.min;
        unionIncludeMin = other.includeMin;
      }

      Version? unionMax;
      bool unionIncludeMax;
      if (allowsHigher(this, other)) {
        unionMax = max;
        unionIncludeMax = includeMax;
      } else {
        unionMax = other.max;
        unionIncludeMax = other.includeMax;
      }

      return VersionRange(
          min: unionMin,
          max: unionMax,
          includeMin: unionIncludeMin,
          includeMax: unionIncludeMax,
          alwaysIncludeMaxPreRelease: true);
    }

    return VersionConstraint.unionOf([this, other]);
  }