itemsListView.swift

struct ItemsListView: View {
    @ObservedObject var viewModel: ItemsViewModel
    @State private var showSortSheet = false
    @State private var itemRowsDisplayMode: ItemRowView.DisplayMode = .large
    
    var currentItems: [Item] {
        get {
            if !viewModel.searchText.isEmpty {
                return viewModel.searchItems
            } else if viewModel.sort != nil {
                return viewModel.sortedItems
            } else {
                return viewModel.items
            }
        }
    }
    
    private var sortButton: some View {
        Button(action: {
            self.showSortSheet.toggle()
        }) {
            Image(systemName: viewModel.sort == nil ? "arrow.up.arrow.down.circle" : "arrow.up.arrow.down.circle.fill")
                .imageScale(.large)
        }
        .safeHoverEffectBarItem(position: .trailing)
    }
    
    private var layoutButton: some View {
        Button(action: {
            self.itemRowsDisplayMode = self.itemRowsDisplayMode == .compact ? .large : .compact
        }) {
            Image(systemName: itemRowsDisplayMode == .large ? "rectangle.grid.1x2" : "list.dash")
                .imageScale(.large)
        }
        .safeHoverEffectBarItem(position: .trailing)
    }
    
    private var sortSheet: ActionSheet {
        var buttons: [ActionSheet.Button] = []
        for sort in ItemsViewModel.Sort.allCases {
            buttons.append(.default(Text(sort.rawValue.localizedCapitalized),
                                    action: {
                                        self.viewModel.sort = sort
            }))
        }
        
        if viewModel.sort != nil {
            buttons.append(.default(Text("Clear Selection"), action: {
                self.viewModel.sort = nil
            }))
        }
        
        buttons.append(.cancel())
        
        let title = Text("Sort items")
        
        if let currentSort = viewModel.sort {
            return ActionSheet(title: title,
                               message: Text("Current Sort: \(currentSort.rawValue.localizedCapitalized)"),
                               buttons: buttons)
        }
        
        return ActionSheet(title: title, buttons: buttons)
    }
    
    var body: some View {
        List {
            SearchField(searchText: $viewModel.searchText)
            ForEach(currentItems) { item in
                NavigationLink(destination: ItemDetailView(item: item)) {
                    ItemRowView(displayMode: self.itemRowsDisplayMode, item: item)
                        .environmentObject(ItemDetailViewModel(item: item))
                        .listRowBackground(Color.dialogue)
                }
            }
        }
        .id(viewModel.sort)
        .modifier(DismissingKeyboardOnSwipe())
        .navigationBarTitle(Text(viewModel.category.label()),
                            displayMode: .inline)
            .navigationBarItems(trailing:
                HStack(spacing: 16) {
                    layoutButton
                    sortButton
                })
        .actionSheet(isPresented: $showSortSheet, content: { self.sortSheet })
    }
}