Creating a dynamic header with multiple sections and multiple items

DynamicRxTableHeader.swift

//section model file

import RxDataSources

enum CommentTableSectionModel {
  case section(comment: Comment, items: [CommentTableSectionModelItem])
}

extension CommentTableSectionModel: SectionModelType {
  
  // define the different types of items that can go in the feed here
  enum CommentTableSectionModelItem {
    case commentSectionItem(Comment)
  }
  
  var items: [CommentTableSectionModelItem] {
    switch  self {
    case .section(comment: _, items: let items):
      return items
    }
  }
  
  var comment: Comment {
    switch self {
    case .section(comment: let comment, items: _):
      return comment
    }
  }
  
  init(original: CommentTableSectionModel, items: [CommentTableSectionModelItem]) {
    switch original {
    case let .section(comment: comment, items: _):
      self = .section(comment: comment, items: items)
    }
  }
}


// to drive the table view...
refreshControl.rx.controlEvent(.valueChanged)
      .startWith(())
      .flatMapLatest { _ in
        return items
      }
      .map { items -> [CommentTableSectionModel]  in
        return items.map { item in
          return CommentTableSectionModel.section(comment: item as! Comment, items:
            items.map{
              return CommentTableSectionModel.CommentTableSectionModelItem.commentSectionItem($0 as! Comment)
            }
            )
        }
        
      }
      .asDriver(onErrorJustReturn: [])
      .drive((tableView?.rx.items(dataSource: dataSource))!)
      .addDisposableTo(rx_disposeBag)