chore: wire in location services

Signed-off-by: Alan Brault <alan.brault@visus.io>

Packages/TempestasDomain/Sources/TempestasDomain/Entities/Coordinate.swift

@@ -0,0 +1,11 @@
+import Foundation
+
+public struct Coordinate: Sendable, Hashable, Codable {
+    public let latitude: Double
+    public let longitude: Double
+
+    public init(latitude: Double, longitude: Double) {
+        self.latitude = latitude
+        self.longitude = longitude
+    }
+}

Packages/TempestasDomain/Sources/TempestasDomain/Entities/CurrentLocation.swift

@@ -0,0 +1,11 @@
+import Foundation
+
+public struct CurrentLocation: Sendable, Hashable {
+    public let coordinate: Coordinate
+    public let name: String
+
+    public init(coordinate: Coordinate, name: String) {
+        self.coordinate = coordinate
+        self.name = name
+    }
+}

Packages/TempestasDomain/Sources/TempestasDomain/Enums/LocationServiceError.swift

@@ -0,0 +1,7 @@
+import Foundation
+
+public enum LocationServiceError: Error, Sendable, Hashable {
+    case authorizationDenied
+    case locationUnavailable(reason: String)
+    case geocodingFailed(reason: String)
+}

Packages/TempestasDomain/Sources/TempestasDomain/Services/LocationService.swift

@@ -0,0 +1,6 @@
+import Foundation
+
+public protocol LocationService: Sendable {
+    func requestAuthorization() async
+    func getCurrentLocation() async throws -> CurrentLocation
+}

Packages/TempestasInfrastructure/Sources/TempestasInfrastructure/Services/DefaultLocationService.swift

@@ -0,0 +1,169 @@
+import CoreLocation
+import TempestasDomain
+
+@MainActor
+public final class DefaultLocationService: NSObject, LocationService {
+    private let manager = CLLocationManager()
+    private let geocoder = CLGeocoder()
+
+    private var authorizationContinuation: CheckedContinuation<Void, Never>?
+    private var locationContinuation: CheckedContinuation<CLLocation, Error>?
+
+    private var authorizationTask: Task<Void, Never>?
+    private var locationTask: Task<CurrentLocation, Error>?
+
+    override public init() {
+        super.init()
+        manager.delegate = self
+    }
+
+    public func requestAuthorization() async {
+        guard manager.authorizationStatus == .notDetermined else { return }
+
+        if let authorizationTask {
+            return await authorizationTask.value
+        }
+
+        let task: Task<Void, Never> = Task { @MainActor in
+            await self.awaitAuthorizationChange()
+        }
+
+        authorizationTask = task
+        defer { authorizationTask = nil }
+
+        await withTaskCancellationHandler {
+            await task.value
+        } onCancel: {
+            task.cancel()
+        }
+    }
+
+    public func getCurrentLocation() async throws -> CurrentLocation {
+        if let locationTask {
+            return try await locationTask.value
+        }
+
+        let task: Task<CurrentLocation, Error> = Task { @MainActor in
+            try await self.fetchCurrentLocation()
+        }
+
+        locationTask = task
+        defer { locationTask = nil }
+
+        return try await withTaskCancellationHandler {
+            try await task.value
+        } onCancel: {
+            task.cancel()
+        }
+    }
+
+    private func fetchCurrentLocation() async throws -> CurrentLocation {
+        try await ensureAuthorized()
+
+        let location = try await requestLocationOnce()
+        let name = await resolveName(for: location)
+
+        return CurrentLocation(
+            coordinate: Coordinate(
+                latitude: location.coordinate.latitude,
+                longitude: location.coordinate.longitude
+            ),
+            name: name
+        )
+    }
+
+    private func ensureAuthorized() async throws {
+        await requestAuthorization()
+
+        switch manager.authorizationStatus {
+        case .authorizedAlways:
+            return
+        case .notDetermined, .denied, .restricted:
+            throw LocationServiceError.authorizationDenied
+        @unknown default:
+            throw LocationServiceError.authorizationDenied
+        }
+    }
+
+    private func awaitAuthorizationChange() async {
+        await withTaskCancellationHandler {
+            await withCheckedContinuation { continuation in
+                self.authorizationContinuation = continuation
+                self.manager.requestWhenInUseAuthorization()
+            }
+        } onCancel: {
+            Task { @MainActor in
+                self.cancelPendingAuthorizationWait()
+            }
+        }
+    }
+
+    private func cancelPendingAuthorizationWait() {
+        guard let authorizationContinuation else { return }
+        self.authorizationContinuation = nil
+        authorizationContinuation.resume()
+    }
+
+    private func requestLocationOnce() async throws -> CLLocation {
+        try await withTaskCancellationHandler {
+            try await withCheckedThrowingContinuation { continuation in
+                self.locationContinuation = continuation
+                self.manager.requestLocation()
+            }
+        } onCancel: {
+            Task { @MainActor in
+                self.cancelPendingLocationRequest()
+            }
+        }
+    }
+
+    private func cancelPendingLocationRequest() {
+        guard let locationContinuation else { return }
+        self.locationContinuation = nil
+        manager.stopUpdatingLocation()
+        locationContinuation.resume(throwing: CancellationError())
+    }
+
+    private func resolveName(for location: CLLocation) async -> String {
+        guard let placemarks = try? await geocoder.reverseGeocodeLocation(location),
+              let placemark = placemarks.first else {
+            return Self.fallbackName(for: location)
+        }
+
+        return placemark.locality ?? placemark.name ?? Self.fallbackName(for: location)
+    }
+
+    private static func fallbackName(for location: CLLocation) -> String {
+        String(format: "%.4f, %.4f", location.coordinate.latitude, location.coordinate.longitude)
+    }
+}
+
+extension DefaultLocationService: @MainActor CLLocationManagerDelegate {
+    public func locationManagerDidChangeAuthorization(_ manager: CLLocationManager) {
+        guard let authorizationContinuation else { return }
+        self.authorizationContinuation = nil
+        authorizationContinuation.resume()
+    }
+
+    public func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
+        guard let locationContinuation else { return }
+        self.locationContinuation = nil
+
+        guard let location = locations.last else {
+            locationContinuation.resume(
+                throwing: LocationServiceError.locationUnavailable(reason: "No location was returned")
+            )
+            return
+        }
+
+        locationContinuation.resume(returning: location)
+    }
+
+    public func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
+        guard let locationContinuation else { return }
+        self.locationContinuation = nil
+        locationContinuation.resume(
+            throwing: LocationServiceError.locationUnavailable(reason: error.localizedDescription)
+        )
+    }
+}

Packages/TempestasPresentation/Sources/TempestasPresentation/ViewModels/MainViewModel.swift

@@ -6,12 +6,42 @@ import TempestasDomain
 @MainActor
 public final class MainViewModel {
     public private(set) var isLoading: Bool = false
+    public private(set) var currentLocation: CurrentLocation?
+    public private(set) var forecast: Forecast?
+    public private(set) var loadError: Error?
 
     private let forecastRepository: ForecastRepository
+    private let locationService: LocationService
 
     public init(
-        forecastRepository: ForecastRepository
+        forecastRepository: ForecastRepository,
+        locationService: LocationService
     ) {
         self.forecastRepository = forecastRepository
+        self.locationService = locationService
+    }
+
+    public func load(forceRefresh: Bool = false) async {
+        guard !isLoading else { return }
+
+        isLoading = true
+        defer { isLoading = false }
+
+        loadError = nil
+
+        do {
+            await locationService.requestAuthorization()
+
+            let location = try await locationService.getCurrentLocation()
+            currentLocation = location
+
+            forecast = try await forecastRepository.get(
+                latitude: location.coordinate.latitude,
+                longitude: location.coordinate.longitude,
+                forceRefresh: forceRefresh
+            )
+        } catch {
+            loadError = error
+        }
     }
 }

Packages/TempestasPresentation/Sources/TempestasPresentation/Views/MainView.swift

@@ -3,15 +3,17 @@ import SwiftUI
 public struct MainView: View {
     let viewModel: MainViewModel
 
-    public init (
+    public init(
         viewModel: MainViewModel
     ) {
         self.viewModel = viewModel
     }
 
     public var body: some View {
-        NavigationStack {
-            
-        }.frame(width: 320, height: 400)
+        NavigationStack {}
+            .frame(width: 320, height: 400)
+            .task {
+                await viewModel.load()
+            }
     }
 }

Tempestas.xcodeproj/project.pbxproj

@@ -462,6 +462,7 @@
 				ENABLE_USER_SELECTED_FILES = readonly;
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_KEY_NSHumanReadableCopyright = "";
+				INFOPLIST_KEY_NSLocationWhenInUseUsageDescription = "Tempestas uses your location to show local weather conditions.";
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/../Frameworks",
@@ -504,6 +505,7 @@
 				ENABLE_USER_SELECTED_FILES = readonly;
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_KEY_NSHumanReadableCopyright = "";
+				INFOPLIST_KEY_NSLocationWhenInUseUsageDescription = "Tempestas uses your location to show local weather conditions.";
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/../Frameworks",

Tempestas/AppComposition.swift

@@ -5,18 +5,27 @@ import TempestasPresentation
 @MainActor
 final class AppComposition {
     private let forecastRepository: ForecastRepository
+    private let locationService: LocationService
 
     init(inMemory: Bool = false) {
         guard let forecastRepository = try? DefaultForecastRepository.makeDefault(inMemory: inMemory) else {
             fatalError("Failed to create the forecast cache store")
         }
 
+        let locationService = DefaultLocationService()
+
         self.forecastRepository = forecastRepository
+        self.locationService = locationService
+
+        Task { @MainActor in
+            await locationService.requestAuthorization()
+        }
     }
 
     func makeMainViewModel() -> MainViewModel {
         MainViewModel(
-            forecastRepository: forecastRepository
+            forecastRepository: forecastRepository,
+            locationService: locationService
         )
     }
 }