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| 1 | +// |
| 2 | +// AlertPermissionsChecker.swift |
| 3 | +// Loop |
| 4 | +// |
| 5 | +// Created by Rick Pasetto on 6/25/21. |
| 6 | +// Copyright © 2021 LoopKit Authors. All rights reserved. |
| 7 | +// |
| 8 | + |
| 9 | +import Foundation |
| 10 | +import Combine |
| 11 | +import LoopKit |
| 12 | +import SwiftUI |
| 13 | + |
| 14 | +class AlertPermissionsChecker { |
| 15 | + private static let notificationsPermissionsAlertIdentifier = Alert.Identifier(managerIdentifier: "LoopAppManager", |
| 16 | + alertIdentifier: "notificationsPermissionsAlert") |
| 17 | + private static let notificationsPermissionsAlertContent = Alert.Content( |
| 18 | + title: NSLocalizedString("Notifications Disabled", |
| 19 | + comment: "Notifications permissions disabled alert title"), |
| 20 | + body: String(format: NSLocalizedString("Keep Notifications turned ON in your phone’s settings to ensure that you can receive %1$@ notifications.", |
| 21 | + comment: "Format for Notifications permissions disabled alert body. (1: app name)"), |
| 22 | + Bundle.main.bundleDisplayName), |
| 23 | + acknowledgeActionButtonLabel: NSLocalizedString("OK", comment: "Notifications permissions disabled alert button") |
| 24 | + ) |
| 25 | + private static let notificationsPermissionsAlert = Alert(identifier: notificationsPermissionsAlertIdentifier, |
| 26 | + foregroundContent: notificationsPermissionsAlertContent, |
| 27 | + backgroundContent: notificationsPermissionsAlertContent, |
| 28 | + trigger: .immediate) |
| 29 | + |
| 30 | + private static let criticalAlertPermissionsAlertIdentifier = Alert.Identifier(managerIdentifier: "LoopAppManager", |
| 31 | + alertIdentifier: "criticalAlertPermissionsAlert") |
| 32 | + private static let criticalAlertPermissionsAlertContent = Alert.Content( |
| 33 | + title: NSLocalizedString("Critical Alerts Disabled", |
| 34 | + comment: "Critical Alert permissions disabled alert title"), |
| 35 | + body: String(format: NSLocalizedString("Keep Critical Alerts turned ON in your phone’s settings to ensure that you can receive %1$@ critical alerts.", |
| 36 | + comment: "Format for Critical Alerts permissions disabled alert body. (1: app name)"), |
| 37 | + Bundle.main.bundleDisplayName), |
| 38 | + acknowledgeActionButtonLabel: NSLocalizedString("OK", comment: "Critical Alert permissions disabled alert button") |
| 39 | + ) |
| 40 | + private static let criticalAlertPermissionsAlert = Alert(identifier: criticalAlertPermissionsAlertIdentifier, |
| 41 | + foregroundContent: criticalAlertPermissionsAlertContent, |
| 42 | + backgroundContent: criticalAlertPermissionsAlertContent, |
| 43 | + trigger: .immediate) |
| 44 | + |
| 45 | + private weak var alertManager: AlertManager? |
| 46 | + |
| 47 | + private var isAppInBackground: Bool { |
| 48 | + return UIApplication.shared.applicationState == UIApplication.State.background |
| 49 | + } |
| 50 | + |
| 51 | + private lazy var cancellables = Set<AnyCancellable>() |
| 52 | + |
| 53 | + init(alertManager: AlertManager) { |
| 54 | + self.alertManager = alertManager |
| 55 | + |
| 56 | + // Check on loop complete, but only while in the background. |
| 57 | + NotificationCenter.default.publisher(for: .LoopCompleted) |
| 58 | + .receive(on: RunLoop.main) |
| 59 | + .sink { [weak self] _ in |
| 60 | + guard let self = self else { return } |
| 61 | + if self.isAppInBackground { |
| 62 | + self.check() |
| 63 | + } |
| 64 | + } |
| 65 | + .store(in: &cancellables) |
| 66 | + |
| 67 | + // Check on app resume |
| 68 | + NotificationCenter.default.publisher(for: UIApplication.willEnterForegroundNotification) |
| 69 | + .receive(on: RunLoop.main) |
| 70 | + .sink { [weak self] _ in |
| 71 | + self?.check() |
| 72 | + } |
| 73 | + .store(in: &cancellables) |
| 74 | + |
| 75 | + NotificationCenter.default.publisher(for: UIApplication.didEnterBackgroundNotification) |
| 76 | + .receive(on: RunLoop.main) |
| 77 | + .sink { [weak self] _ in |
| 78 | + self?.check() |
| 79 | + } |
| 80 | + .store(in: &cancellables) |
| 81 | + } |
| 82 | + |
| 83 | + func check() { |
| 84 | + UNUserNotificationCenter.current().getNotificationSettings { settings in |
| 85 | + DispatchQueue.main.async { |
| 86 | + let notificationsPermissions = settings.alertSetting |
| 87 | + let criticalAlertsPermissions = settings.criticalAlertSetting |
| 88 | + |
| 89 | + if notificationsPermissions == .disabled { |
| 90 | + self.maybeNotifyNotificationPermissionsDisabled() |
| 91 | + } else { |
| 92 | + self.notificationsPermissionsEnabled() |
| 93 | + } |
| 94 | + if FeatureFlags.criticalAlertsEnabled { |
| 95 | + if criticalAlertsPermissions == .disabled { |
| 96 | + self.maybeNotifyCriticalAlertPermissionsDisabled() |
| 97 | + } else { |
| 98 | + self.criticalAlertPermissionsEnabled() |
| 99 | + } |
| 100 | + } |
| 101 | + } |
| 102 | + } |
| 103 | + } |
| 104 | + |
| 105 | + private func maybeNotifyNotificationPermissionsDisabled() { |
| 106 | + if !UserDefaults.standard.hasIssuedNotificationsPermissionsAlert { |
| 107 | + alertManager?.issueAlert(AlertPermissionsChecker.notificationsPermissionsAlert) |
| 108 | + UserDefaults.standard.hasIssuedNotificationsPermissionsAlert = true |
| 109 | + } |
| 110 | + } |
| 111 | + |
| 112 | + private func notificationsPermissionsEnabled() { |
| 113 | + alertManager?.retractAlert(identifier: AlertPermissionsChecker.notificationsPermissionsAlertIdentifier) |
| 114 | + UserDefaults.standard.hasIssuedNotificationsPermissionsAlert = false |
| 115 | + } |
| 116 | + |
| 117 | + private func maybeNotifyCriticalAlertPermissionsDisabled() { |
| 118 | + if !UserDefaults.standard.hasIssuedCriticalAlertPermissionsAlert { |
| 119 | + alertManager?.issueAlert(AlertPermissionsChecker.criticalAlertPermissionsAlert) |
| 120 | + UserDefaults.standard.hasIssuedCriticalAlertPermissionsAlert = true |
| 121 | + } |
| 122 | + } |
| 123 | + |
| 124 | + private func criticalAlertPermissionsEnabled() { |
| 125 | + alertManager?.retractAlert(identifier: AlertPermissionsChecker.criticalAlertPermissionsAlertIdentifier) |
| 126 | + UserDefaults.standard.hasIssuedCriticalAlertPermissionsAlert = false |
| 127 | + } |
| 128 | + |
| 129 | +} |
| 130 | + |
| 131 | +extension UserDefaults { |
| 132 | + |
| 133 | + private enum Key: String { |
| 134 | + case hasIssuedNotificationsPermissionsAlert = "com.loopkit.Loop.HasIssuedNotificationsPermissionsAlert" |
| 135 | + case hasIssuedCriticalAlertPermissionsAlert = "com.loopkit.Loop.HasIssuedCriticalAlertPermissionsAlert" |
| 136 | + } |
| 137 | + |
| 138 | + var hasIssuedNotificationsPermissionsAlert: Bool { |
| 139 | + get { |
| 140 | + return object(forKey: Key.hasIssuedNotificationsPermissionsAlert.rawValue) as? Bool ?? false |
| 141 | + } |
| 142 | + set { |
| 143 | + set(newValue, forKey: Key.hasIssuedNotificationsPermissionsAlert.rawValue) |
| 144 | + } |
| 145 | + } |
| 146 | + |
| 147 | + var hasIssuedCriticalAlertPermissionsAlert: Bool { |
| 148 | + get { |
| 149 | + return object(forKey: Key.hasIssuedCriticalAlertPermissionsAlert.rawValue) as? Bool ?? false |
| 150 | + } |
| 151 | + set { |
| 152 | + set(newValue, forKey: Key.hasIssuedCriticalAlertPermissionsAlert.rawValue) |
| 153 | + } |
| 154 | + } |
| 155 | +} |
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