Add support for widget update push notifications

Sources/APNSCore/APNSPushType.swift

@@ -25,6 +25,7 @@ public struct APNSPushType: Hashable, Sendable, CustomStringConvertible {
         case mdm
         case liveactivity
         case pushtotalk
+        case widgets
     }
 
     public var description: String {
@@ -108,4 +109,10 @@ public struct APNSPushType: Hashable, Sendable, CustomStringConvertible {
     /// - Important: If you set this push type, the topic must use your app’s bundle ID with `.voip-ptt` appended to the end.
     ///
     public static let pushtotalk = Self(configuration: .pushtotalk)
+
+    /// Use the widgets push type for notifications that trigger widget updates.
+    ///
+    /// - Important: if you set this push type, the topic must use your app’s bundle ID with `.push-type.widgets` appended to the end.
+    ///
+    public static let widgets = Self(configuration: .widgets)
 }

Sources/APNSCore/Widgets/APNSClient+Widgets.swift

@@ -0,0 +1,43 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the APNSwift open source project
+//
+// Copyright (c) 2025 the APNSwift project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of APNSwift project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
+
+extension APNSClientProtocol {
+    /// Sends a widgets update notification to APNs.
+    ///
+    /// - Parameters:
+    ///   - notification: The notification to send.
+    ///
+    ///   - deviceToken: The hexadecimal bytes that identify the user’s device. Your app receives the bytes for this device token
+    ///    when registering for remote notifications.
+    ///
+    @discardableResult
+    @inlinable
+    public func sendWidgetsNotification(
+        notification: APNSWidgetsNotification,
+        deviceToken: String
+    ) async throws -> APNSResponse {
+        let request = APNSRequest(
+            message: notification,
+            deviceToken: deviceToken,
+            pushType: .widgets,
+            expiration: notification.expiration,
+            priority: notification.priority,
+            apnsID: notification.apnsID,
+            topic: notification.topic,
+            collapseID: nil
+        )
+        return try await send(request)
+    }
+}

Sources/APNSCore/Widgets/APNSWidgetsNotification.swift

@@ -0,0 +1,99 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the APNSwift open source project
+//
+// Copyright (c) 2022 the APNSwift project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of APNSwift project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
+import struct Foundation.UUID
+
+/// A widget update notification.
+public struct APNSWidgetsNotification: APNSMessage {
+    @usableFromInline
+    struct APS: Encodable, Sendable {
+        enum CodingKeys: String, CodingKey {
+            case contentAvailable = "content-changed"
+        }
+
+        let contentAvailable: Bool = true
+    }
+
+    @usableFromInline
+    enum CodingKeys: CodingKey {
+        case aps
+    }
+
+    /// The fixed content to indicate that this is a background notification.
+    @usableFromInline
+    internal let aps = APS()
+
+    /// A canonical UUID that identifies the notification. If there is an error sending the notification,
+    /// APNs uses this value to identify the notification to your server. The canonical form is 32 lowercase hexadecimal digits,
+    /// displayed in five groups separated by hyphens in the form 8-4-4-4-12. An example UUID is as follows:
+    /// `123e4567-e89b-12d3-a456-42665544000`.
+    ///
+    /// If you omit this, a new UUID is created by APNs and returned in the response.
+    public var apnsID: UUID?
+
+    /// The topic for the notification. In general, the topic is your app’s bundle ID/app ID suffixed with `.push-type.widgets`.
+    public var topic: String
+
+    /// The date when the notification is no longer valid and can be discarded. If this value is not `none`,
+    /// APNs stores the notification and tries to deliver it at least once,
+    /// repeating the attempt as needed if it is unable to deliver the notification the first time.
+    /// If the value is `immediately`, APNs treats the notification as if it expires immediately
+    /// and does not store the notification or attempt to redeliver it.
+    public var expiration: APNSNotificationExpiration
+
+    /// The priority of the notification.
+    public var priority: APNSPriority
+
+    /// Initializes a new ``APNSWidgetsNotification``.
+    ///
+    /// - Parameters:
+    ///   - expiration: The date when the notification is no longer valid and can be discarded.
+    ///   - priority: The priority of the notification.
+    ///   - appID: Your app’s bundle ID/app ID. This will be suffixed with `.push-type.widgets`.
+    ///   - apnsID: A canonical UUID that identifies the notification.
+    @inlinable
+    public init(
+        expiration: APNSNotificationExpiration,
+        priority: APNSPriority,
+        appID: String,
+        apnsID: UUID? = nil
+    ) {
+        self.init(
+            expiration: expiration,
+            priority: priority,
+            topic: appID + ".push-type.widgets",
+            apnsID: apnsID
+        )
+    }
+
+    /// Initializes a new ``APNSWidgetsNotification``.
+    ///
+    /// - Parameters:
+    ///   - expiration: The date when the notification is no longer valid and can be discarded.
+    ///   - priority: The priority of the notification.
+    ///   - topic: The topic for the notification. In general, the topic is your app’s bundle ID/app ID suffixed with `.push-type.widgets`.
+    ///   - apnsID: A canonical UUID that identifies the notification.
+    @inlinable
+    public init(
+        expiration: APNSNotificationExpiration,
+        priority: APNSPriority,
+        topic: String,
+        apnsID: UUID? = nil
+    ) {
+        self.expiration = expiration
+        self.priority = priority
+        self.topic = topic
+        self.apnsID = apnsID
+    }
+}

Tests/APNSTests/Widgets/APNSWidgetsNotificationTests.swift

@@ -0,0 +1,47 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the APNSwift open source project
+//
+// Copyright (c) 2022 the APNSwift project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of APNSwift project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
+import APNSCore
+import XCTest
+
+final class APNSWidgetsNotificationTests: XCTestCase {
+    func testAppID() {
+        let widgetsNotification = APNSWidgetsNotification(
+            expiration: .none,
+            priority: .immediately,
+            appID: "com.example.app"
+        )
+
+        XCTAssertEqual(widgetsNotification.topic, "com.example.app.push-type.widgets")
+    }
+
+    func testEncode() throws {
+        let widgetsNotification = APNSWidgetsNotification(
+            expiration: .none,
+            priority: .immediately,
+            appID: "com.example.app"
+        )
+
+        let encoder = JSONEncoder()
+        let data = try encoder.encode(widgetsNotification)
+
+        let expectedJSONString = """
+        {"aps":{"content-changed":true}}
+        """
+        let jsonObject1 = try JSONSerialization.jsonObject(with: data) as! NSDictionary
+        let jsonObject2 = try JSONSerialization.jsonObject(with: expectedJSONString.data(using: .utf8)!) as! NSDictionary
+        XCTAssertEqual(jsonObject1, jsonObject2)
+    }
+
+}