collection_view_swiftui.swift

struct CollectionView<Section: Hashable & CaseIterable, Item: Hashable>: UIViewControllerRepresentable {
    
    // MARK: - Properties
    let layout: UICollectionViewLayout
    let sections: [Section]
    let items: [Section: [Item]]
    let supplementaryKinds: [String]
    let animateChanges: Bool?
    
    // MARK: - Actions
    let content: (_ indexPath: IndexPath, _ item: Item) -> AnyView
    let snapshot: (() -> NSDiffableDataSourceSnapshot<Section, Item>)?
    let supplementaryContent: ((_ kind: String, _ indexPath: IndexPath, _ item: Item?) -> AnyView)?
   
    init(layout: UICollectionViewLayout,
         sections: [Section],
         items: [Section: [Item]],
         snapshot: (() -> NSDiffableDataSourceSnapshot<Section, Item>)? = nil,
         supplementaryKinds: [String] = [],
         animateChanges: Bool? = nil,
         supplementaryContent: ((_ kind: String, _ IndexPath: IndexPath, _ item: Item?) -> AnyView)? = nil,
         @ViewBuilder content:  @escaping (_ indexPath: IndexPath, _ item: Item) -> AnyView) {
        self.layout = layout
        
        self.sections = sections
        self.items = items
        
        self.snapshot = snapshot
        self.animateChanges = animateChanges
        
        self.supplementaryKinds = supplementaryKinds
        self.supplementaryContent = supplementaryContent
        
        self.content = content
    }
 }