[Woo POS][Local Catalog] Add a periodic sync when the app is in the foreground #16246
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| import Foundation | ||
| import UIKit | ||
| import CocoaLumberjackSwift | ||
| import Yosemite | ||
| import Experiments | ||
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| /// Periodically syncs POS catalog while the app is in the foreground. | ||
| /// Triggers `catalogCoordinator.performSmartSync()` every hour when active. | ||
| /// | ||
| final class ForegroundPOSCatalogSyncDispatcher { | ||
| private enum Constants { | ||
| static let syncInterval: TimeInterval = 60 * 60 // 1 hour | ||
| static let initialSyncDelay: TimeInterval = 5 // 5 seconds after becoming active | ||
| static let leeway: Int = 5 // 5 seconds leeway to give a system more flexibility in managing resources | ||
| } | ||
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| private let interval: TimeInterval | ||
| private let notificationCenter: NotificationCenter | ||
| private let timerProvider: DispatchTimerProviding | ||
| private let featureFlagService: FeatureFlagService | ||
| private let stores: StoresManager | ||
| private var observers: [NSObjectProtocol] = [] | ||
| private var timer: DispatchTimerProtocol? | ||
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| private var isRunning: Bool { | ||
| syncSiteID != nil | ||
| } | ||
| private var syncSiteID: Int64? | ||
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| init(interval: TimeInterval = Constants.syncInterval, | ||
| notificationCenter: NotificationCenter = .default, | ||
| timerProvider: DispatchTimerProviding = DefaultDispatchTimerProvider(), | ||
| featureFlagService: FeatureFlagService = ServiceLocator.featureFlagService, | ||
| stores: StoresManager = ServiceLocator.stores) { | ||
| self.interval = interval | ||
| self.notificationCenter = notificationCenter | ||
| self.timerProvider = timerProvider | ||
| self.featureFlagService = featureFlagService | ||
| self.stores = stores | ||
| } | ||
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| deinit { | ||
| stop() | ||
| } | ||
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| func start() { | ||
| guard featureFlagService.isFeatureFlagEnabled(.pointOfSaleLocalCatalogi1) else { | ||
| return | ||
| } | ||
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| if syncSiteID != stores.sessionManager.defaultStoreID { | ||
| DDLogInfo("🔄 ForegroundPOSCatalogSyncDispatcher: Site has changed, resetting the sync") | ||
| stop() | ||
| } | ||
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| guard !isRunning else { return } | ||
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| DDLogInfo("🔄 ForegroundPOSCatalogSyncDispatcher: Starting foreground sync dispatcher") | ||
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| let activeObserver = notificationCenter.addObserver( | ||
| forName: UIApplication.didBecomeActiveNotification, | ||
| object: nil, | ||
| queue: .main | ||
| ) { [weak self] _ in | ||
| self?.startTimer() | ||
| } | ||
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| let backgroundObserver = notificationCenter.addObserver( | ||
| forName: UIApplication.didEnterBackgroundNotification, | ||
| object: nil, | ||
| queue: .main | ||
| ) { [weak self] _ in | ||
| self?.stopTimer() | ||
| } | ||
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| let defaultSiteObserver = notificationCenter.addObserver( | ||
| forName: .StoresManagerDidUpdateDefaultSite, | ||
| object: nil, | ||
| queue: .main | ||
| ) { [weak self] _ in | ||
| self?.stop() | ||
| } | ||
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| observers = [activeObserver, backgroundObserver, defaultSiteObserver] | ||
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| if UIApplication.shared.applicationState == .active { | ||
| startTimer() | ||
| } | ||
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| syncSiteID = stores.sessionManager.defaultStoreID | ||
| } | ||
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| func stop() { | ||
| guard isRunning else { return } | ||
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| DDLogInfo("🛑 ForegroundPOSCatalogSyncDispatcher: Stopping foreground sync dispatcher") | ||
| observers.forEach(notificationCenter.removeObserver) | ||
| observers.removeAll() | ||
| stopTimer() | ||
| syncSiteID = nil | ||
| } | ||
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| private func startTimer() { | ||
| guard timer == nil else { return } | ||
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| DDLogInfo("⏱️ ForegroundPOSCatalogSyncDispatcher: Starting timer (interval: \(Int(interval))s, initial delay: \(Int(Constants.initialSyncDelay))s)") | ||
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| let queue = DispatchQueue(label: "com.automattic.woocommerce.posCatalogForegroundSync.timer", qos: .utility) | ||
| let timer = timerProvider.makeTimer(queue: queue) | ||
| timer.schedule(deadline: .now() + Constants.initialSyncDelay, repeating: interval, leeway: .seconds(Constants.leeway)) | ||
| timer.setEventHandler { [weak self] in | ||
| self?.performSync() | ||
| } | ||
| timer.resume() | ||
| self.timer = timer | ||
| } | ||
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| private func stopTimer() { | ||
| guard timer != nil else { return } | ||
| DDLogInfo("⏱️ ForegroundPOSCatalogSyncDispatcher: Stopping timer") | ||
| timer?.cancel() | ||
| timer = nil | ||
| } | ||
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| private func performSync() { | ||
| guard featureFlagService.isFeatureFlagEnabled(.pointOfSaleLocalCatalogi1) else { | ||
| DDLogInfo("📋 ForegroundPOSCatalogSyncDispatcher: Feature flag disabled, skipping sync") | ||
| stop() | ||
| return | ||
| } | ||
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| guard let siteID = stores.sessionManager.defaultStoreID else { | ||
| DDLogInfo("📋 ForegroundPOSCatalogSyncDispatcher: No default store, skipping sync") | ||
| stop() | ||
| return | ||
| } | ||
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| guard let coordinator = stores.posCatalogSyncCoordinator else { | ||
| DDLogInfo("📋 ForegroundPOSCatalogSyncDispatcher: Coordinator unavailable, skipping sync") | ||
| stop() | ||
| return | ||
| } | ||
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| DDLogInfo("🔄 ForegroundPOSCatalogSyncDispatcher: Starting sync for site \(siteID)") | ||
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| Task.detached(priority: .utility) { | ||
|
Contributor
There was a problem hiding this comment. Good use of detached and priority queue! |
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| do { | ||
| try await coordinator.performSmartSync(for: siteID) | ||
| DDLogInfo("✅ ForegroundPOSCatalogSyncDispatcher: Sync completed for site \(siteID)") | ||
| } catch let error as POSCatalogSyncError { | ||
| switch error { | ||
| case .syncAlreadyInProgress: | ||
| DDLogInfo("ℹ️ ForegroundPOSCatalogSyncDispatcher: Sync already in progress for site \(siteID)") | ||
| case .negativeMaxAge: | ||
| DDLogError("⛔️ ForegroundPOSCatalogSyncDispatcher: Invalid max age for site \(siteID)") | ||
| } | ||
| } catch { | ||
| DDLogError("⛔️ ForegroundPOSCatalogSyncDispatcher: Sync failed for site \(siteID): \(error)") | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| // MARK: - Helpers | ||
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| /// Simplified protocol for dispatch source timers, only exposing methods actually used. | ||
| protocol DispatchTimerProtocol { | ||
| func schedule(deadline: DispatchTime, repeating: Double, leeway: DispatchTimeInterval) | ||
| func setEventHandler(handler: (() -> Void)?) | ||
| func resume() | ||
| func cancel() | ||
| } | ||
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| extension DispatchSourceTimer { | ||
| func asTimer() -> DispatchTimerProtocol { | ||
| DispatchTimerWrapper(timer: self) | ||
| } | ||
| } | ||
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| private struct DispatchTimerWrapper: DispatchTimerProtocol { | ||
| let timer: DispatchSourceTimer | ||
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| func schedule(deadline: DispatchTime, repeating: Double, leeway: DispatchTimeInterval) { | ||
| timer.schedule(deadline: deadline, repeating: repeating, leeway: leeway) | ||
| } | ||
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| func setEventHandler(handler: (() -> Void)?) { | ||
| timer.setEventHandler(handler: handler) | ||
| } | ||
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| func resume() { | ||
| timer.resume() | ||
| } | ||
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| func cancel() { | ||
| timer.cancel() | ||
| } | ||
| } | ||
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| /// Protocol for creating dispatch timers, enabling testability. | ||
| protocol DispatchTimerProviding { | ||
| func makeTimer(queue: DispatchQueue) -> DispatchTimerProtocol | ||
| } | ||
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| /// Default implementation using system DispatchSource. | ||
| struct DefaultDispatchTimerProvider: DispatchTimerProviding { | ||
| func makeTimer(queue: DispatchQueue) -> DispatchTimerProtocol { | ||
| DispatchSource.makeTimerSource(queue: queue).asTimer() | ||
| } | ||
| } | ||
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Consider if passing the
siteIDin the DDLog here would be useful: When I switched from a POS-eligible store to a non-eligible one the only notice logged was that the timer stopped. Perhaps not necessary as we would see the siteID changing from context of other events.