import UIKit
import RxSwift
import RxCocoa
import RxDataSources

class ViewController: BaseCollectionViewController {

    ...

    typealias Section = AnimatableSectionModel<String, CellStyle>
    private let dataSource = RxCollectionViewSectionedAnimatedDataSource<Section>()

        ...

    override func viewDidLoad() {
        super.viewDidLoad()

            ...

            ...
                .map { [Section(model: "", items: $0.map(CellStyle.link))] }
                    .asDriver(onErrorDriveWith: .empty())
                    .drive(collectionView.rx.items(dataSource: dataSource))
                    .disposed(by: disposeBag)

        dataSource.configureCell = { (dataSource, collectionView, indexPath, cellStyle) in
            switch cellStyle {
            case let .link(link):
                let cell = GiftCollectionViewCell.dequeue(from: collectionView, forIndexPath: indexPath)
                cell.link = link
                return cell
            }
        }
    }

    enum CellStyle {
        case link(Link)
    }
}

extension ViewController.CellStyle: IdentifiableType, Equatable {
    var identity: String {
        switch self {
        case let .link(link):
            return link.identifier
        }
    }

    public static func ==(lhs: ViewController.CellStyle, rhs: ViewController.CellStyle) -> Bool {
        return false
    }
}