func prepareEditorForTarget()

in src/Tulsi/OptionsEditorController.swift [233:278]
43 lines of code
8 McCabe index (conditional complexity)

  func prepareEditorForTarget(_ target: UIRuleInfo?) {
    if target == nil {
      targetValueColumn.isHidden = true
    } else {
      targetValueColumn.title = target!.targetName!
      targetValueColumn.isHidden = false
    }

    var newOptionNodes = [OptionsEditorNode]()
    var optionGroupNodes = [TulsiOptionKeyGroup: OptionsEditorGroupNode]()

    let optionSet = model?.optionSet
    guard let visibleOptions = optionSet?.allVisibleOptions else { return }
    for (key, option) in visibleOptions {
      let newNode: OptionsEditorNode
      switch option.valueType {
        case .bool:
          newNode = OptionsEditorBooleanNode(key: key, option: option, model: model, target: target)
        case .string:
          newNode = OptionsEditorStringNode(key: key,
                                            option: option,
                                            model: model,
                                            target: target)
        case .stringEnum:
          newNode = OptionsEditorConstrainedStringNode(key: key,
                                                       option: option,
                                                       model: model,
                                                       target: target)
      }

      if let (group, displayName, description) = optionSet?.groupInfoForOptionKey(key) {
        var parent: OptionsEditorGroupNode! = optionGroupNodes[group]
        if parent == nil {
          parent = OptionsEditorGroupNode(key: group,
                                          displayName: displayName,
                                          description: description)
          optionGroupNodes[group] = parent
          newOptionNodes.append(parent)
        }
        parent.addChildNode(newNode)
      } else {
        newOptionNodes.append(newNode)
      }
    }
    nodes = newOptionNodes.sorted { $0.name < $1.name }
  }