IGListKit/Examples/Examples-iOS/IGListKitExamples/ViewControllers/NestedAdapterViewController.swift

/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

import IGListKit
import UIKit

final class NestedAdapterViewController: UIViewController, ListAdapterDataSource {

    lazy var adapter: ListAdapter = {
        return ListAdapter(updater: ListAdapterUpdater(), viewController: self)
    }()
    let collectionView = UICollectionView(frame: .zero, collectionViewLayout: UICollectionViewFlowLayout())

    let data: [Any] = [
        "Ridiculus Elit Tellus Purus Aenean",
        "Condimentum Sollicitudin Adipiscing",
        14,
        "Ligula Ipsum Tristique Parturient Euismod",
        "Purus Dapibus Vulputate",
        6,
        "Tellus Nibh Ipsum Inceptos",
        2
    ]

    override func viewDidLoad() {
        super.viewDidLoad()
        view.addSubview(collectionView)
        adapter.collectionView = collectionView
        adapter.dataSource = self
    }

    override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()
        collectionView.frame = view.bounds
    }

    // MARK: ListAdapterDataSource

    func objects(for listAdapter: ListAdapter) -> [ListDiffable] {
        return data as! [ListDiffable]
    }

    func listAdapter(_ listAdapter: ListAdapter, sectionControllerFor object: Any) -> ListSectionController {
        if object is Int {
            return HorizontalSectionController()
        } else {
            return LabelSectionController()
        }
    }

    func emptyView(for listAdapter: ListAdapter) -> UIView? {
        return nil
    }

}