Add push notifications

CHDataManagement/Notifications/NotificationSender.swift

@@ -0,0 +1,73 @@
+import Foundation
+
+final class NotificationSender: ObservableObject {
+
+    @Published
+    var isTransmittingToRemote = false
+
+    @Published
+    var lastPushWasSuccessful = true
+
+    init() {
+
+    }
+
+    func failedToCreateNotificationDueToMissingSettings() {
+        guard !isTransmittingToRemote else { return }
+        DispatchQueue.main.async {
+            self.lastPushWasSuccessful = false
+        }
+    }
+
+    func send(url: String, request: NotificationRequest) {
+        guard !isTransmittingToRemote else { return }
+        DispatchQueue.main.async {
+            self.isTransmittingToRemote = true
+        }
+        
+        guard let url = URL(string: url) else {
+            print("Invalid notification url: \(url)")
+            didFinish(success: false)
+            return
+        }
+        let body: Data
+        do {
+            body = try JSONEncoder().encode(request)
+        } catch {
+            print("Failed to encode notification: \(error)")
+            didFinish(success: false)
+            return
+        }
+        var request = URLRequest(url: url)
+        request.httpMethod = "POST"
+        request.httpBody = body
+
+        Task {
+            do {
+                let (_ , result) = try await URLSession.shared.data(for: request)
+                guard let response = result as? HTTPURLResponse else {
+                    print("Invalid response \(result)")
+                    didFinish(success: false)
+                    return
+                }
+                guard response.statusCode == 200 else {
+                    print("Failed to send notification: \(response.statusCode)")
+                    didFinish(success: false)
+                    return
+                }
+                didFinish(success: true)
+            } catch {
+                print("Failed to send notification request: \(error)")
+                didFinish(success: false)
+                return
+            }
+        }
+    }
+
+    private func didFinish(success: Bool) {
+        DispatchQueue.main.async {
+            self.isTransmittingToRemote = false
+            self.lastPushWasSuccessful = success
+        }
+    }
+}