Notifications: Add notification for session expired (#118)

ls1intum · Feb 6, 2025 · 024124b · 024124b
1 parent a4fc70e
commit 024124b
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diff --git a/Sources/APIClient/APIClient.swift b/Sources/APIClient/APIClient.swift
@@ -1,5 +1,6 @@
 import Foundation
 import Common
+import UserNotifications
 import UserStore
 
 // swiftlint:disable force_cast
@@ -193,6 +194,8 @@ public final class APIClient {
             UserSessionFactory.shared.savePassword(password: nil)
             UserSessionFactory.shared.saveUsername(username: nil)
         }
+        // Remove notification about being logged out
+        UNUserNotificationCenter.current().removeAllPendingNotificationRequests()
     }
 
     private func logoutAndSetTokenExpired() {

diff --git a/Sources/PushNotifications/PushNotificationHandler.swift b/Sources/PushNotifications/PushNotificationHandler.swift
@@ -78,10 +78,37 @@ public class PushNotificationHandler {
                             PushNotificationUserInfoKeys.communicationInfo: notification.communicationInfo?.asData]
         return content
     }
+
+    /// Schedules a local notification that will be sent to the user when the current
+    /// login session, and thus the push notification token, is invalidated
+    public static func scheduleNotificationForSessionExpired() {
+        guard let cookies = URLSession.shared.configuration.httpCookieStorage?.cookies else {
+            return
+        }
+        let jwtCookie = cookies.first { $0.name == "jwt" }
+        if let jwtCookie, let expiryDate = jwtCookie.expiresDate {
+            let triggerComponents = Calendar.current.dateComponents([.year, .month, .day, .hour, .minute], from: expiryDate)
+            let trigger = UNCalendarNotificationTrigger(dateMatching: triggerComponents,
+                                                        repeats: false)
+
+            let content = UNMutableNotificationContent()
+            content.title = R.string.localizable.sessionExpiredTitle()
+            content.body = R.string.localizable.sessionExpiredBody()
+
+            let notification = UNNotificationRequest(identifier: LocalNotificationIdentifiers.sessionExpired,
+                                                     content: content,
+                                                     trigger: trigger)
+            UNUserNotificationCenter.current().add(notification)
+        }
+    }
 }
 
 class PushNotificationUserInfoKeys {
     static var target = "target"
     static var type = "type"
     static var communicationInfo = "communicationInfo"
 }
+
+public class LocalNotificationIdentifiers {
+    public static let sessionExpired = "sessionExpiredNotification"
+}
diff --git a/Sources/PushNotifications/Resources/en.lproj/Localizable.strings b/Sources/PushNotifications/Resources/en.lproj/Localizable.strings
@@ -109,6 +109,7 @@
 "artemisApp.singleUserNotification.title.createGroupChat" = "New group chat";
 "artemisApp.singleUserNotification.title.createDirectChat" = "New direct chat";
 "artemisApp.singleUserNotification.title.mentionedInMessage" = "You were mentioned";
+"sessionExpiredTitle" = "Session expired";
 
 // MARK: Body
 "artemisApp.singleUserNotification.text.exerciseSubmissionAssessed" = "Your submission for the %2$@ exercise \"%3$@\" in the course \"%1$@\" has been assessed.";
@@ -149,6 +150,7 @@
 "artemisApp.singleUserNotification.text.removeUserGroupChat" = "You have been removed from group chat by %2$@ in course %1$@.";
 "artemisApp.singleUserNotification.text.addUserGroupChat" = "You have been added to a new group chat by %2$@ in course %1$@.";
 "artemisApp.singleUserNotification.text.createGroupChat" = "You have been added to a new group chat by %2$@ in course %1$@.";
+"sessionExpiredBody" = "Please log in again to Artemis to continue receiving notifications.";
 
 // MARK: - Communication
 "repliedTo" = "%1$@ (replied to %2$@)";