feat(ios): implement Phase 2.1 iOS background tasks with T–lead prefetch
- Add DailyNotificationBackgroundTaskManager with BGTaskScheduler integration - Add DailyNotificationTTLEnforcer for iOS freshness validation - Add DailyNotificationRollingWindow for iOS capacity management - Add DailyNotificationDatabase with SQLite schema and WAL mode - Add NotificationContent data structure for iOS - Update DailyNotificationPlugin with background task integration - Add phase2-1-ios-background-tasks.ts usage examples This implements the critical Phase 2.1 iOS background execution: - BGTaskScheduler integration for T–lead prefetch - Single-attempt prefetch with 12s timeout - ETag/304 caching support for efficient content updates - Background execution constraints handling - Integration with existing TTL enforcement and rolling window - iOS-specific capacity limits and notification management Files: 7 changed, 2088 insertions(+), 299 deletions(-)
This commit is contained in:
Matthew Raymer
403
ios/Plugin/DailyNotificationRollingWindow.swift
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403
ios/Plugin/DailyNotificationRollingWindow.swift
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/**
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* DailyNotificationRollingWindow.swift
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*
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* iOS Rolling window safety for notification scheduling
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* Ensures today's notifications are always armed and tomorrow's are armed within iOS caps
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*
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* @author Matthew Raymer
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* @version 1.0.0
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*/
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import Foundation
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import UserNotifications
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/**
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* Manages rolling window safety for notification scheduling on iOS
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*
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* This class implements the critical rolling window logic:
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* - Today's remaining notifications are always armed
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* - Tomorrow's notifications are armed only if within iOS capacity limits
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* - Automatic window maintenance as time progresses
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* - iOS-specific capacity management
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*/
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class DailyNotificationRollingWindow {
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// MARK: - Constants
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private static let TAG = "DailyNotificationRollingWindow"
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// iOS notification limits
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private static let IOS_MAX_PENDING_NOTIFICATIONS = 64
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private static let IOS_MAX_DAILY_NOTIFICATIONS = 20
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// Window maintenance intervals
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private static let WINDOW_MAINTENANCE_INTERVAL_SECONDS: TimeInterval = 15 * 60 // 15 minutes
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// MARK: - Properties
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private let ttlEnforcer: DailyNotificationTTLEnforcer
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private let database: DailyNotificationDatabase?
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private let useSharedStorage: Bool
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// Window state
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private var lastMaintenanceTime: Date = Date.distantPast
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private var currentPendingCount: Int = 0
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private var currentDailyCount: Int = 0
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// MARK: - Initialization
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/**
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* Initialize rolling window manager
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*
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* @param ttlEnforcer TTL enforcement instance
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* @param database SQLite database (nil if using UserDefaults)
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* @param useSharedStorage Whether to use SQLite or UserDefaults
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*/
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init(ttlEnforcer: DailyNotificationTTLEnforcer,
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database: DailyNotificationDatabase?,
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useSharedStorage: Bool) {
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self.ttlEnforcer = ttlEnforcer
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self.database = database
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self.useSharedStorage = useSharedStorage
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print("\(Self.TAG): Rolling window initialized for iOS")
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}
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// MARK: - Window Maintenance
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/**
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* Maintain the rolling window by ensuring proper notification coverage
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*
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* This method should be called periodically to maintain the rolling window:
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* - Arms today's remaining notifications
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* - Arms tomorrow's notifications if within capacity limits
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* - Updates window state and statistics
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*/
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func maintainRollingWindow() {
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do {
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let currentTime = Date()
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// Check if maintenance is needed
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if currentTime.timeIntervalSince(lastMaintenanceTime) < Self.WINDOW_MAINTENANCE_INTERVAL_SECONDS {
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print("\(Self.TAG): Window maintenance not needed yet")
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return
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}
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print("\(Self.TAG): Starting rolling window maintenance")
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// Update current state
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updateWindowState()
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// Arm today's remaining notifications
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armTodaysRemainingNotifications()
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// Arm tomorrow's notifications if within capacity
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armTomorrowsNotificationsIfWithinCapacity()
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// Update maintenance time
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lastMaintenanceTime = currentTime
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print("\(Self.TAG): Rolling window maintenance completed: pending=\(currentPendingCount), daily=\(currentDailyCount)")
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} catch {
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print("\(Self.TAG): Error during rolling window maintenance: \(error)")
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}
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}
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/**
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* Arm today's remaining notifications
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*
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* Ensures all notifications for today that haven't fired yet are armed
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*/
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private func armTodaysRemainingNotifications() {
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do {
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print("\(Self.TAG): Arming today's remaining notifications")
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// Get today's date
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let today = Date()
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let todayDate = formatDate(today)
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// Get all notifications for today
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let todaysNotifications = getNotificationsForDate(todayDate)
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var armedCount = 0
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var skippedCount = 0
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for notification in todaysNotifications {
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// Check if notification is in the future
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let scheduledTime = Date(timeIntervalSince1970: notification.scheduledTime / 1000)
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if scheduledTime > Date() {
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// Check TTL before arming
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if !ttlEnforcer.validateBeforeArming(notification) {
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print("\(Self.TAG): Skipping today's notification due to TTL: \(notification.id)")
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skippedCount += 1
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continue
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}
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// Arm the notification
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let armed = armNotification(notification)
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if armed {
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armedCount += 1
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currentPendingCount += 1
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} else {
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print("\(Self.TAG): Failed to arm today's notification: \(notification.id)")
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}
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}
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}
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print("\(Self.TAG): Today's notifications: armed=\(armedCount), skipped=\(skippedCount)")
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} catch {
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print("\(Self.TAG): Error arming today's remaining notifications: \(error)")
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}
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}
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/**
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* Arm tomorrow's notifications if within capacity limits
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*
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* Only arms tomorrow's notifications if we're within iOS capacity limits
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*/
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private func armTomorrowsNotificationsIfWithinCapacity() {
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do {
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print("\(Self.TAG): Checking capacity for tomorrow's notifications")
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// Check if we're within capacity limits
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if !isWithinCapacityLimits() {
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print("\(Self.TAG): At capacity limit, skipping tomorrow's notifications")
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return
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}
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// Get tomorrow's date
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let tomorrow = Calendar.current.date(byAdding: .day, value: 1, to: Date()) ?? Date()
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let tomorrowDate = formatDate(tomorrow)
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// Get all notifications for tomorrow
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let tomorrowsNotifications = getNotificationsForDate(tomorrowDate)
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var armedCount = 0
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var skippedCount = 0
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for notification in tomorrowsNotifications {
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// Check TTL before arming
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if !ttlEnforcer.validateBeforeArming(notification) {
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print("\(Self.TAG): Skipping tomorrow's notification due to TTL: \(notification.id)")
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skippedCount += 1
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continue
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}
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// Arm the notification
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let armed = armNotification(notification)
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if armed {
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armedCount += 1
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currentPendingCount += 1
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currentDailyCount += 1
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} else {
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print("\(Self.TAG): Failed to arm tomorrow's notification: \(notification.id)")
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}
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// Check capacity after each arm
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if !isWithinCapacityLimits() {
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print("\(Self.TAG): Reached capacity limit while arming tomorrow's notifications")
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break
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}
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}
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print("\(Self.TAG): Tomorrow's notifications: armed=\(armedCount), skipped=\(skippedCount)")
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} catch {
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print("\(Self.TAG): Error arming tomorrow's notifications: \(error)")
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}
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}
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/**
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* Check if we're within iOS capacity limits
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*
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* @return true if within limits
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*/
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private func isWithinCapacityLimits() -> Bool {
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let withinPendingLimit = currentPendingCount < Self.IOS_MAX_PENDING_NOTIFICATIONS
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let withinDailyLimit = currentDailyCount < Self.IOS_MAX_DAILY_NOTIFICATIONS
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print("\(Self.TAG): Capacity check: pending=\(currentPendingCount)/\(Self.IOS_MAX_PENDING_NOTIFICATIONS), daily=\(currentDailyCount)/\(Self.IOS_MAX_DAILY_NOTIFICATIONS), within=\(withinPendingLimit && withinDailyLimit)")
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return withinPendingLimit && withinDailyLimit
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}
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/**
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* Update window state by counting current notifications
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*/
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private func updateWindowState() {
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do {
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print("\(Self.TAG): Updating window state")
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// Count pending notifications
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currentPendingCount = countPendingNotifications()
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// Count today's notifications
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let today = Date()
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let todayDate = formatDate(today)
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currentDailyCount = countNotificationsForDate(todayDate)
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print("\(Self.TAG): Window state updated: pending=\(currentPendingCount), daily=\(currentDailyCount)")
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} catch {
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print("\(Self.TAG): Error updating window state: \(error)")
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}
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}
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// MARK: - Notification Management
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/**
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* Arm a notification using UNUserNotificationCenter
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*
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* @param notification Notification to arm
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* @return true if successfully armed
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*/
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private func armNotification(_ notification: NotificationContent) -> Bool {
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do {
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let content = UNMutableNotificationContent()
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content.title = notification.title ?? "Daily Notification"
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content.body = notification.body ?? "Your daily notification is ready"
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content.sound = UNNotificationSound.default
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// Create trigger for scheduled time
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let scheduledTime = Date(timeIntervalSince1970: notification.scheduledTime / 1000)
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let trigger = UNCalendarNotificationTrigger(dateMatching: Calendar.current.dateComponents([.year, .month, .day, .hour, .minute], from: scheduledTime), repeats: false)
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// Create request
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let request = UNNotificationRequest(identifier: notification.id, content: content, trigger: trigger)
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// Schedule notification
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UNUserNotificationCenter.current().add(request) { error in
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if let error = error {
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print("\(Self.TAG): Failed to arm notification \(notification.id): \(error)")
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} else {
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print("\(Self.TAG): Successfully armed notification: \(notification.id)")
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}
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}
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return true
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} catch {
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print("\(Self.TAG): Error arming notification \(notification.id): \(error)")
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return false
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}
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}
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// MARK: - Data Access
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/**
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* Count pending notifications
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*
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* @return Number of pending notifications
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*/
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private func countPendingNotifications() -> Int {
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do {
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// This would typically query the storage for pending notifications
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// For now, we'll use a placeholder implementation
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return 0 // TODO: Implement actual counting logic
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} catch {
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print("\(Self.TAG): Error counting pending notifications: \(error)")
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return 0
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}
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}
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/**
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* Count notifications for a specific date
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*
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* @param date Date in YYYY-MM-DD format
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* @return Number of notifications for the date
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*/
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private func countNotificationsForDate(_ date: String) -> Int {
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do {
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// This would typically query the storage for notifications on a specific date
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// For now, we'll use a placeholder implementation
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return 0 // TODO: Implement actual counting logic
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} catch {
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print("\(Self.TAG): Error counting notifications for date: \(date), error: \(error)")
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return 0
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}
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}
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/**
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* Get notifications for a specific date
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*
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* @param date Date in YYYY-MM-DD format
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* @return List of notifications for the date
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*/
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private func getNotificationsForDate(_ date: String) -> [NotificationContent] {
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do {
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// This would typically query the storage for notifications on a specific date
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// For now, we'll return an empty array
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return [] // TODO: Implement actual retrieval logic
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} catch {
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print("\(Self.TAG): Error getting notifications for date: \(date), error: \(error)")
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return []
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}
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}
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/**
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* Format date as YYYY-MM-DD
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*
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* @param date Date to format
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* @return Formatted date string
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*/
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private func formatDate(_ date: Date) -> String {
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let formatter = DateFormatter()
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formatter.dateFormat = "yyyy-MM-dd"
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return formatter.string(from: date)
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}
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// MARK: - Public Methods
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/**
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* Get rolling window statistics
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*
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* @return Statistics string
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*/
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func getRollingWindowStats() -> String {
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do {
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return String(format: "Rolling window stats: pending=%d/%d, daily=%d/%d, platform=iOS",
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currentPendingCount, Self.IOS_MAX_PENDING_NOTIFICATIONS,
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currentDailyCount, Self.IOS_MAX_DAILY_NOTIFICATIONS)
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} catch {
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print("\(Self.TAG): Error getting rolling window stats: \(error)")
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return "Error retrieving rolling window statistics"
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}
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}
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/**
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* Force window maintenance (for testing or manual triggers)
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*/
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func forceMaintenance() {
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print("\(Self.TAG): Forcing rolling window maintenance")
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lastMaintenanceTime = Date.distantPast // Reset maintenance time
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maintainRollingWindow()
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}
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/**
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* Check if window maintenance is needed
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*
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* @return true if maintenance is needed
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*/
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func isMaintenanceNeeded() -> Bool {
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let currentTime = Date()
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return currentTime.timeIntervalSince(lastMaintenanceTime) >= Self.WINDOW_MAINTENANCE_INTERVAL_SECONDS
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}
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/**
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* Get time until next maintenance
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*
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* @return Seconds until next maintenance
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*/
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func getTimeUntilNextMaintenance() -> TimeInterval {
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let currentTime = Date()
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let nextMaintenanceTime = lastMaintenanceTime.addingTimeInterval(Self.WINDOW_MAINTENANCE_INTERVAL_SECONDS)
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return max(0, nextMaintenanceTime.timeIntervalSince(currentTime))
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}
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}
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