ContentView samples for https://stackoverflow.com/questions/61560644/get-enum-publisher-with-combine

ContentViewEnum.swift

import SwiftUI
import Combine

struct ContentView: View {
    
    enum SectionPane: Equatable, Identifiable, CustomStringConvertible {
        
        case servers
        case snippets
        
        var description: String {
            switch self {
            case .servers:
                return "server"
            case .snippets:
                return "snippet"
            }
        }
      
        var id: SectionPane { self }
    }
    
    @State var selectedPane: SectionPane? = nil
    
    // BUG workaround, suggested at https://stackoverflow.com/questions/61003652/selection-in-navigationlink-is-not-working
    @State var highlightedPane: SectionPane? = nil
    
    // Subscribe to highlightedPane update to update active var
    private var isActivePublisher: AnyPublisher<String, Never> {
        return highlightedPane?.publisher
            .map { $0.description }
            .eraseToAnyPublisher() ??
                Just("").eraseToAnyPublisher()
    }
    
    @State private var active: String = ""
    
    var body: some View {
        NavigationView {
            VStack(alignment: .leading) {
                // Current selection label
                Text("Selected: \(active)")
              
                NavigationLink(destination: Text("first view").onAppear{ self.highlightedPane = SectionPane.servers }, tag: SectionPane.servers, selection: $selectedPane) {
                    Text("First")
                }
                NavigationLink(destination: Text("second view").onAppear{ self.highlightedPane = SectionPane.snippets }, tag: SectionPane.snippets, selection: $selectedPane) {
                    Text("Second")
                }
                
                Spacer()
            }.onReceive(isActivePublisher, perform: { selection in
                self.active = selection
            })
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

ContentViewString.swift

import SwiftUI
import Combine

struct ContentView: View {
    
    @State var selectedPane: String? = nil
    
    // BUG workaround, suggested at https://stackoverflow.com/questions/61003652/selection-in-navigationlink-is-not-working
    @State var highlightedPane: String? = nil
    
    // Subscribe to highlightedPane update to update active var
    private var isActivePublisher: AnyPublisher<String, Never> {
        return highlightedPane?.publisher
            .collect()
            .map {String($0)}
            .eraseToAnyPublisher() ??
                Just("").eraseToAnyPublisher()
    }
    
    @State private var active: String = ""
    
    var body: some View {
        NavigationView {
            VStack(alignment: .leading) {
                // Current selection label
                Text("Selected: \(active)")
              
                NavigationLink(destination: Text("first view").onAppear{ self.highlightedPane = "servers" }, tag: "servers", selection: $selectedPane) {
                    Text("First")
                }
                NavigationLink(destination: Text("second view").onAppear{ self.highlightedPane = "snippets" }, tag: "snippets", selection: $selectedPane) {
                    Text("Second")
                }
                
                Spacer()
            }.onReceive(isActivePublisher, perform: { selection in
                self.active = selection
            })
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}