atulkhatri

private func fetchData() {
    switch type {
    case .movies:
        NetworkManager().fetchMovieData { [weak self] (page, error) in
            guard let self = self else { return }
            if let page = page {
                self.loadData(page: page)
            } else {
                print("No movies found!!")
            }

atulkhatri

extension HomeViewController: UICollectionViewDelegateFlowLayout {
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        switch type {
        case .movies: return CGSize(width: collectionView.frame.size.width, height: Constants.moviesCellHeight)
        case .series: return CGSize(width: collectionView.frame.size.width, height: Constants.seriesCellHeight)
        }
    }
    
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize {
        return CGSize(width: collectionView.frame.size.width, height: Constants.sectionHeaderHeight)

atulkhatri

extension HomeViewController: UICollectionViewDataSource {
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return pageModel?.data.count ?? 0
    }
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 1
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

atulkhatri

// These are defined on top of the file
private let kRailCellIdentifier = "RailCell"
private let kRailHeaderIdentifier = "RailHeaderView"

class HomeViewController: UIViewController {
  @IBOutlet weak var collectionView: UICollectionView!
  
  override func viewDidLoad() {
      super.viewDidLoad()
      setupView()

atulkhatri

private func createRequest(for url: String) -> URLRequest? {
    guard let url = URL(string: url) else { return nil }
    var request = URLRequest(url: url)
    request.httpMethod = "GET"
    request.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
    return request
}

atulkhatri

NetworkManager().fetchMovieData { [weak self] (page, error) in
    guard let self = self else { return }
    if let page = page {
        self.loadData(page: page)
    } else {
        print("No movies found!!")
    }
}

atulkhatri

struct PageModel: Codable {
    let data: [RailModel]
}

struct RailModel: Codable {
    let title, type: String
    let list: [AssetModel]
}

struct AssetModel: Codable {

atulkhatri

enum NetworkError: Error {
    case invalidUrl
    case invalidData
}

atulkhatri

typealias RailCompletionClosure = ((PageModel?, Error?) -> Void)

public func fetchMovieData(completion: RailCompletionClosure?) {
    guard let request = createRequest(for: "https://raw.githubusercontent.com/atulkhatri/random/master/bootcamp-home-movies.json") else {
        completion?(nil, NetworkError.invalidUrl)
        return
    }
    executeRequest(request: request, completion: completion)
}

atulkhatri

if let decodedResponse = try? JSONDecoder().decode(T.self, from: data) {
    DispatchQueue.main.async {
        completion?(decodedResponse, nil)
    }
}