Update toggle SwiftUI toggle switch with Firebase - firebase

Question

Despite the simplicity of the question I have not been able to find a satisfactory answer yet. I want to update toggle switches based on value in Firebase. I have added listeners but run into problems converting a Bool to Binding Bool, any help is appreciated.
struct oneSeqeuncer : Identifiable{
var id: String
var status: Bool
}
struct Sequencers: View {
#ObservedObject var seqModel = SequencerModel()
#State private var novaseq404A :Bool = true
#State private var novaseq404B :Bool = true
#State private var novaseq297A :Bool = true
#State private var novaseq297B :Bool = true
var body: some View {
ZStack{
VStack{
Text("Sequencers")
.foregroundColor(.white)
.font(.title)
.fontWeight(.bold)
.padding()
List{
HStack{
Text("404")
.font(.title)
.padding()
Toggle("", isOn: $novaseq404A)
.onChange(of: novaseq404A) { newValue in
updateStatus(name: "404A", status: novaseq404A)
}
Toggle("", isOn: $novaseq404B)
.padding()
.onChange(of: novaseq404B) { newValue in
updateStatus(name: "404B", status: novaseq404B)
}
}
HStack{
Text("297")
.font(.title)
.padding()
Toggle("", isOn: $novaseq297A)
.onChange(of: novaseq297A) { newValue in
updateStatus(name: "297A", status: novaseq297A)
}
Toggle("", isOn: $novaseq297B)
.padding()
.onChange(of: novaseq297B) { newValue in
updateStatus(name: "297B", status: novaseq297B)
}
}
}
}
}.onAppear(){
self.seqModel.fetchData()
for seq in seqModel.seqs{
if seq.id == "404A"{
novaseq404A = seq.status
}
if seq.id == "404B"{
novaseq404A = seq.status
}
if seq.id == "297A"{
novaseq297A = seq.status
}
if seq.id == "297B"{
novaseq297B = seq.status
}
}
func updateStatus(name: String, status: Bool){
let timeInterval = NSDate().timeIntervalSince1970
let myInt = Int(timeInterval)
let db = Firestore.firestore()
if status == false{
db.collection("Sequencers").document(name).updateData([
"status": false,
"lastChange" : myInt
]){ error in
if error != nil{
print(error!)
}
}
}
else{
let docRef = db.collection("Sequencers").document(name)
docRef.getDocument {(document, error) in
if error != nil {
print(error!)
}
if let document = document, document.exists{
let data = document.data()
if let lastChange = data!["lastChange"]! as? Int{
let timeOff = myInt - lastChange
if let timeOffTotal = data!["timeOff"]! as? Int{
let newTimeOff = timeOffTotal + timeOff
db.collection("Sequencers").document(name).updateData([
"timeOff" : newTimeOff
])
}
}
db.collection("Sequencers").document(name).updateData([
"previousChange": data!["lastChange"]!,
"status": true ,
"lastChange" : myInt
])
}
}
}
}
}
struct Sequencers_Previews: PreviewProvider {
static var previews: some View {
Sequencers()
}
}
Below is my model for storing 'sequencers'
import Foundation
import FirebaseFirestore
import Firebase
class SequencerModel : ObservableObject {
#Published var seqs = [oneSeqeuncer]()
private var db = Firestore.firestore()
func fetchData(){
db.collection("Sequencers").addSnapshotListener { (querySnapshot, error) in
guard let documents = querySnapshot?.documents else {
print("No documents")
return
}
self.seqs = documents.map { queryDocumentSnapshot -> oneSeqeuncer in
let data = queryDocumentSnapshot.data()
let id = queryDocumentSnapshot.documentID
let status = data["status"] as? Bool
print(id)
print(status as Any)
return oneSeqeuncer(id: id, status: status!)
}
}
}
}

Answer 1

My solution was not ideal but solved, I realized the function .fetchData() that I was calling to was taking too long to respond. Ideally I should use some completion handler... However I simply changed my TabView on ContentView to display another page first, to allow time for my call to Firebase to finish, which allowed my for loop in .onAppear to have a non empty iterable. Again not sure this really belongs as an "Answer" but just wanted to share my temp solution as an option.