Initial commit

pushextension/Info.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleDisplayName</key>
+	<string>pushextension</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>$(PRODUCT_BUNDLE_PACKAGE_TYPE)</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.4.28</string>
+	<key>CFBundleVersion</key>
+	<string>142800</string>
+	<key>NSExtension</key>
+	<dict>
+		<key>NSExtensionPointIdentifier</key>
+		<string>com.apple.usernotifications.service</string>
+		<key>NSExtensionPrincipalClass</key>
+		<string>$(PRODUCT_MODULE_NAME).NotificationService</string>
+	</dict>
+</dict>
+</plist>

pushextension/NotificationService.swift

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+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import UserNotifications
+
+class NotificationService: UNNotificationServiceExtension {
+
+    static var lastRemoteNotifictionTS: Int64 = 0
+    var contentHandler: ((UNNotificationContent) -> Void)?
+    var bestAttemptContent: UNMutableNotificationContent?
+
+    override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) {
+        self.contentHandler = contentHandler
+        bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)
+
+        var change: Bool = false
+
+        // var diffTime = Date().millisecondsSince1970 - NotificationService.lastRemoteNotifictionTS
+        // print("noti:Tlast=\(NotificationService.lastRemoteNotifictionTS)")
+        // print("noti:Tnow=\(Date().millisecondsSince1970)")
+        // print("noti:Tdiff=\(diffTime)")
+
+        // HINT: now always change message text to "connecting ..."
+        // check if last notification was received less than 24 seconds ago
+        // if (diffTime < (25 * 1000)) {
+            // print("noti:change=true")
+            change = true
+        // }
+
+        NotificationService.lastRemoteNotifictionTS = Date().millisecondsSince1970
+
+        if let bestAttemptContent = bestAttemptContent {
+            if (change) {
+                // print("noti:actually changing")
+                bestAttemptContent.title = "connecting ..."
+            }
+            contentHandler(bestAttemptContent)
+        }
+    }
+    
+    override func serviceExtensionTimeWillExpire() {
+        if let contentHandler = contentHandler, let bestAttemptContent =  bestAttemptContent {
+            contentHandler(bestAttemptContent)
+        }
+    }
+
+}
+
+extension Date {
+    var millisecondsSince1970: Int64 {
+        Int64((self.timeIntervalSince1970 * 1000.0).rounded())
+    }
+
+    init(milliseconds: Int64) {
+        self = Date(timeIntervalSince1970: TimeInterval(milliseconds) / 1000)
+    }
+}