iOS Notification Service

ios/App/NotificationService/Info.plist

@@ -0,0 +1,13 @@
+<?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>NSExtension</key>
+	<dict>
+		<key>NSExtensionPointIdentifier</key>
+		<string>com.apple.usernotifications.service</string>
+		<key>NSExtensionPrincipalClass</key>
+		<string>$(PRODUCT_MODULE_NAME).NotificationService</string>
+	</dict>
+</dict>
+</plist>

ios/App/NotificationService/NotificationService.swift

@@ -0,0 +1,49 @@
+//
+//  NotificationService.swift
+//  NotificationService
+//
+//  Created by Matias Carulli on 5/7/26.
+//
+
+import UserNotifications
+
+class NotificationService: UNNotificationServiceExtension {
+
+    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)
+
+        guard
+            let content = bestAttemptContent,
+            let imageUrlString = request.content.userInfo["imageUrl"] as? String,
+            let imageUrl = URL(string: imageUrlString)
+        else {
+            contentHandler(request.content)
+            return
+        }
+
+        URLSession.shared.downloadTask(with: imageUrl) { location, _, error in
+            defer { contentHandler(content) }
+            guard let location = location, error == nil else { return }
+
+            let tmpFile = URL(fileURLWithPath: NSTemporaryDirectory())
+                .appendingPathComponent(imageUrl.lastPathComponent)
+
+            try? FileManager.default.moveItem(at: location, to: tmpFile)
+
+            if let attachment = try? UNNotificationAttachment(identifier: "avatar", url: tmpFile) {
+                content.attachments = [attachment]
+            }
+        }.resume()
+    }
+
+    override func serviceExtensionTimeWillExpire() {
+        if let contentHandler = contentHandler, let content = bestAttemptContent {
+            contentHandler(content)
+        }
+    }
+
+}