No options in dynamically provided intent for widget

Issue

I'm trying to implement dynamically provided options for my iOS 15 widget. So far I successfully implemented static intent parameters, and now I wanted to extend it with dynamically provided ones. The dynamic parameter in my .intentdefinition file is called HotspotList and has type String.

I have defined a struct where I have also saved a list of availableHotspots:

struct Hotspot: Hashable, Identifiable, Codable {

...

static var availableHotspots = UserDefaults.standard.object(forKey: "hotspots") as? [String] ?? [] 
}

I have checked that this array is successfully saved with print(Hotspot.availableHotspots) somewhere in my main View.

Now I want to use this array in my IntentHandler.swift file:

import Intents

class IntentHandler: INExtension, WidgetConfigurationIntentHandling {
    
    override func handler(for intent: INIntent) -> Any {
        
        return self
    }
    
    func provideHotspotListOptionsCollection(for intent: WidgetConfigurationIntent) async throws -> INObjectCollection<NSString> {
        let hotspots: [NSString] = Hotspot.availableHotspots.map { element in
            let nsstring = element as NSString
            
            return nsstring
        }
        
        let collection = INObjectCollection(items: hotspots)

        return collection
    }
    
    func defaultHotspotList(for intent: WidgetConfigurationIntent) -> String? {
                
        return "thisIsJustATest"
        
    }
    
}

I see that the intent is implemented correctly, because defaultHotspotList() returns the default parameter. But somehow provideHotspotListOptionsCollection() doesn't return the list of Strings. What am I doing wrong?

Note: I also tried the non-async option of the function:

    func provideHotspotListOptionsCollection(for intent: WidgetConfigurationIntent, with completion: @escaping (INObjectCollection<NSString>?, Error?) -> Void) {
        let hotspots: [NSString] = Hotspot.availableHotspots.map { element in
            let nsstring = element as NSString

            return nsstring
        }

        let collection = INObjectCollection(items: hotspots)
        print(collection)
        completion(collection, nil)
    }

Solution

So with the hint of @loremipsum I was able to fix it by myself. For anyone interested, here's my solution:

I added the following lines in my MainView in the App target:

struct MainView: View {
    
    @AppStorage("hotspots", store: UserDefaults(suiteName: "group.com.<<bundleID>>"))
    var hotspotData: Data = Data()
    
...

        save(hotspots: miners)

...

    func save(hotspots: [String]) {
        do {
            hotspotData = try NSKeyedArchiver.archivedData(withRootObject: hotspots, requiringSecureCoding: false)
            WidgetCenter.shared.reloadAllTimelines()
            
        } catch let error {
            print("error hotspots key data not saved \(error.localizedDescription)")
        }
    }

and then to retrieve the data in the IntentHandler.swift:

import Intents
import SwiftUI

class IntentHandler: INExtension, WidgetConfigurationIntentHandling {
    
    @AppStorage("hotspots", store: UserDefaults(suiteName: "group.com.<<bundleID>>"))
    var hotspotData: Data = Data()

    func provideHotspotListOptionsCollection(for intent: WidgetConfigurationIntent) async throws -> INObjectCollection<NSString> {

        var hotspots: [String] {
            
            var hotspots: [String]?
            
            do {
                hotspots = try NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(hotspotData) as? [String]
            } catch let error {
                print("color error \(error.localizedDescription)")
                
            }
            return hotspots ?? []
        }
        
        let NSHotspots: [NSString] = hotspots.map { element in
            let nsstring = element as NSString
            
            return nsstring
        }
        
        let collection = INObjectCollection(items: NSHotspots)
        
        return collection
    }

Answered By - benialstrasz