function createGroups()

in src/main/resources/static/find-owners.js [539:587]
47 lines of code
12 McCabe index (conditional complexity)

      function createGroups() {
        var owners2group = {};  // owner list to group name
        var firstNoOwnerFile = null;
        var keysOfFile2Owners = Object.keys(result.file2owners);
        keysOfFile2Owners.sort().forEach(function(name) {
          var splitOwners = result.file2owners[name];
          var owners = splitOwners.join(' ');
          if (owners in owners2group) {
            groups[owners2group[owners]].size += 1;
          } else {
            owners2group[owners] = name;
            var type;
            if (!hasNamedOwner(splitOwners)) {
              firstNoOwnerFile = name;
              type = GROUP_TYPE.HAS_NO_OWNER;
            } else if (hasOwnerApproval(reviewerVote, splitOwners)) {
              type = GROUP_TYPE.OWNER_APPROVED;
            } else if (hasStar(splitOwners)) {
              type = GROUP_TYPE.STAR_APPROVED;
            } else if (!hasOwnerReviewer(reviewerId, splitOwners)) {
              type = GROUP_TYPE.NEED_REVIEWER;
            } else {
              type = GROUP_TYPE.NEED_APPROVAL;
            }
            groups[name] = {'type': type, 'size': 1, 'owners': owners};
          }
        });
        var numNoOwnerFiles = result.files.length - keysOfFile2Owners.length;
        if (keysOfFile2Owners.length > 0 && numNoOwnerFiles > 0) {
          if (!!firstNoOwnerFile) {
            // count other files as HAS_NO_OWNER
            groups[firstNoOwnerFile].size += numNoOwnerFiles;
          } else {
            // use one of the no-owner-file as group name
            for (var i = 0; i < result.files.length; i++) {
              var name = result.files[i];
              if (!(name in result.file2owners) &&
                  !(('./' + name) in result.file2owners)) {
                groups[name] = {
                  'type': GROUP_TYPE.HAS_NO_OWNER,
                  'size': numNoOwnerFiles,
                  'owners': '*',
                };
                break;
              }
            }
          }
        }
      }