pi-remote-ios/Sources/Core/Push/DeviceTokenRegistrar.swift

114 lines
4.6 KiB
Swift

// Sources/Core/Push/DeviceTokenRegistrar.swift
// T-2.9: APNs device token storage + deferred sidecar registration
import UIKit
/// Receives the APNs device token and registers it with the paired sidecar.
///
/// **Phase 2 note:** the sidecar does not yet expose a dedicated
/// `/device-token` endpoint. The token and a *pending* flag are stored in
/// `UserDefaults`; `registerWithSidecar` will be fully wired once the
/// endpoint lands in a follow-up task. Until then the method records the
/// intent and returns without making a network call.
actor DeviceTokenRegistrar {
// MARK: - Singleton
static let shared = DeviceTokenRegistrar()
private init() {}
// MARK: - UserDefaults keys
private enum Keys {
static let tokenHex = "piremote.push.tokenHex"
static let registrationPending = "piremote.push.registrationPending"
}
// MARK: - State
/// Hex-encoded 40-byte device token string (80 hex chars).
private(set) var tokenHex: String? = nil
// MARK: - Token ingestion
/// Store the raw token data received from `didRegisterForRemoteNotificationsWithDeviceToken`.
func didRegister(tokenData: Data) {
let hex = tokenData.map { String(format: "%02x", $0) }.joined()
tokenHex = hex
UserDefaults.standard.set(hex, forKey: Keys.tokenHex)
// Mark any previously-pending registration as still pending so it is
// retried when `registerWithSidecar` is next called.
if UserDefaults.standard.bool(forKey: Keys.registrationPending) == false {
UserDefaults.standard.set(true, forKey: Keys.registrationPending)
}
}
// MARK: - Registration
/// Attempt to register the current device token with the paired sidecar.
///
/// **Current behaviour (stub):** the sidecar endpoint is not yet
/// available, so the method persists the token locally and marks the
/// registration as pending. The pending flag will be consumed and cleared
/// when the real endpoint is wired in the Phase 2 follow-up.
///
/// - Parameter credential: The active `SidecarCredential` obtained from
/// the Keychain after a successful pairing.
/// - Throws: `DeviceTokenRegistrarError.noTokenAvailable` if the APNs
/// token has not been received yet.
func registerWithSidecar(credential: SidecarCredential) async throws {
// Recover a previously-stored token if we don't have one in memory yet
// (e.g. after a cold launch where `didRegister` fires after we call
// `registerWithSidecar`).
if tokenHex == nil {
tokenHex = UserDefaults.standard.string(forKey: Keys.tokenHex)
}
guard tokenHex != nil else {
throw DeviceTokenRegistrarError.noTokenAvailable
}
// Stub
// TODO(Phase 2 follow-up): POST to `<scheme>://<host>:<port>/device-token`
// with JSON body:
// { "deviceToken": tokenHex, "environment": DeviceTokenRegistrar.environment }
// Headers: Authorization: Bearer <credential.bearerToken>
// On HTTP 200 clear the pending flag.
//
// For now, just mark it as pending so it is retried when the
// endpoint becomes available.
//
UserDefaults.standard.set(true, forKey: Keys.registrationPending)
}
// MARK: - Environment
/// APNs environment derived from the build configuration.
///
/// Switch to `"production"` when distributing via TestFlight or the
/// App Store (the aps-environment entitlement controls the actual
/// environment; this string is sent to the sidecar for its records).
nonisolated static var environment: String {
#if DEBUG
return "sandbox"
#else
return "production"
#endif
}
// MARK: - Pending state helper
/// `true` when a token has been stored but not yet acknowledged by the sidecar.
nonisolated static var isRegistrationPending: Bool {
UserDefaults.standard.bool(forKey: Keys.registrationPending)
}
}
// MARK: - Errors
enum DeviceTokenRegistrarError: Error, Sendable {
/// `didRegisterForRemoteNotificationsWithDeviceToken` has not been called yet.
case noTokenAvailable
}