feat: add node location support

apps/ios/Sources/Location/LocationService.swift

@@ -0,0 +1,142 @@
+import ClawdisKit
+import CoreLocation
+import Foundation
+
+@MainActor
+final class LocationService: NSObject, CLLocationManagerDelegate {
+    enum Error: Swift.Error {
+        case timeout
+        case unavailable
+    }
+
+    private let manager = CLLocationManager()
+    private var authContinuation: CheckedContinuation<CLAuthorizationStatus, Never>?
+    private var locationContinuation: CheckedContinuation<CLLocation, Swift.Error>?
+
+    override init() {
+        super.init()
+        self.manager.delegate = self
+        self.manager.desiredAccuracy = kCLLocationAccuracyBest
+    }
+
+    func authorizationStatus() -> CLAuthorizationStatus {
+        self.manager.authorizationStatus
+    }
+
+    func accuracyAuthorization() -> CLAccuracyAuthorization {
+        if #available(iOS 14.0, *) {
+            return self.manager.accuracyAuthorization
+        }
+        return .fullAccuracy
+    }
+
+    func ensureAuthorization(mode: ClawdisLocationMode) async -> CLAuthorizationStatus {
+        guard CLLocationManager.locationServicesEnabled() else { return .denied }
+
+        let status = self.manager.authorizationStatus
+        if status == .notDetermined {
+            self.manager.requestWhenInUseAuthorization()
+            let updated = await self.awaitAuthorizationChange()
+            if mode != .always { return updated }
+        }
+
+        if mode == .always {
+            let current = self.manager.authorizationStatus
+            if current == .authorizedWhenInUse {
+                self.manager.requestAlwaysAuthorization()
+                return await self.awaitAuthorizationChange()
+            }
+            return current
+        }
+
+        return self.manager.authorizationStatus
+    }
+
+    func currentLocation(
+        params: ClawdisLocationGetParams,
+        desiredAccuracy: ClawdisLocationAccuracy,
+        maxAgeMs: Int?,
+        timeoutMs: Int?) async throws -> CLLocation
+    {
+        let now = Date()
+        if let maxAgeMs,
+           let cached = self.manager.location,
+           now.timeIntervalSince(cached.timestamp) * 1000 <= Double(maxAgeMs)
+        {
+            return cached
+        }
+
+        self.manager.desiredAccuracy = Self.accuracyValue(desiredAccuracy)
+        let timeout = max(0, timeoutMs ?? 10_000)
+        return try await self.withTimeout(timeoutMs: timeout) {
+            try await self.requestLocation()
+        }
+    }
+
+    private func requestLocation() async throws -> CLLocation {
+        try await withCheckedThrowingContinuation { cont in
+            self.locationContinuation = cont
+            self.manager.requestLocation()
+        }
+    }
+
+    private func awaitAuthorizationChange() async -> CLAuthorizationStatus {
+        await withCheckedContinuation { cont in
+            self.authContinuation = cont
+        }
+    }
+
+    private func withTimeout<T>(
+        timeoutMs: Int,
+        operation: @escaping () async throws -> T) async throws -> T
+    {
+        if timeoutMs == 0 {
+            return try await operation()
+        }
+
+        return try await withThrowingTaskGroup(of: T.self) { group in
+            group.addTask { try await operation() }
+            group.addTask {
+                try await Task.sleep(nanoseconds: UInt64(timeoutMs) * 1_000_000)
+                throw Error.timeout
+            }
+            let result = try await group.next()!
+            group.cancelAll()
+            return result
+        }
+    }
+
+    private static func accuracyValue(_ accuracy: ClawdisLocationAccuracy) -> CLLocationAccuracy {
+        switch accuracy {
+        case .coarse:
+            return kCLLocationAccuracyKilometer
+        case .balanced:
+            return kCLLocationAccuracyHundredMeters
+        case .precise:
+            return kCLLocationAccuracyBest
+        }
+    }
+
+    func locationManagerDidChangeAuthorization(_ manager: CLLocationManager) {
+        if let cont = self.authContinuation {
+            self.authContinuation = nil
+            cont.resume(returning: manager.authorizationStatus)
+        }
+    }
+
+    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
+        guard let cont = self.locationContinuation else { return }
+        self.locationContinuation = nil
+        if let latest = locations.last {
+            cont.resume(returning: latest)
+        } else {
+            cont.resume(throwing: Error.unavailable)
+        }
+    }
+
+    func locationManager(_ manager: CLLocationManager, didFailWithError error: Swift.Error) {
+        guard let cont = self.locationContinuation else { return }
+        self.locationContinuation = nil
+        cont.resume(throwing: error)
+    }
+}