Added "Store"-Button in Content View, which stores sample Data as a JSON-File with the required structure

RippleChat/ContentView.swift

@@ -10,6 +10,7 @@ import CoreBluetooth
 
 struct ContentView: View {
     @ObservedObject private var bluetoothViewModel = BluetoothViewModel()
+    @StateObject private var store = FeedStore(feed: Feed.sampleFeed)
     
     var body: some View {
         VStack {
@@ -17,6 +18,16 @@ struct ContentView: View {
                 .imageScale(.large)
                 .foregroundColor(.accentColor)
             Text("Hello, world!")
+            Spacer()
+            Button("Save Feed") {
+                Task {
+                    do {
+                        try await store.save(feed: Feed.sampleFeed)
+                    } catch {
+                        fatalError(error.localizedDescription)
+                    }
+                }
+            }
         }
         .padding()
         NavigationView {

RippleChat/Feed.swift

@@ -9,8 +9,14 @@ import Foundation
 
 struct Feed: Codable {
     
+    let feedID: String
     let feed: [LogEntry]
     
+    init(feedID: String = "", feed: [LogEntry] = []) {
+        self.feedID = feedID
+        self.feed = feed
+    }
+    
 }
 
 extension Feed {
@@ -22,4 +28,6 @@ extension Feed {
         LogEntry(feedid: "BOB", sequenceNumber: 3, body: Body(tag: "txt", value: "Welcome Alice"))
     ]
     
+    static let sampleFeed: Feed = Feed(feedID: "BOB", feed: sampleData)
+    
 }

RippleChat/FeedStore.swift

@@ -10,33 +10,37 @@ import SwiftUI
 @MainActor
 class FeedStore: ObservableObject {
     
-    @Published var feed: [LogEntry] = []
+    @Published var feed: Feed
     
-    private static func fileURL() throws -> URL {
+    init(feed: Feed) {
+        self.feed = feed
+    }
+    
+    private func fileURL() throws -> URL {
         try FileManager.default.url(for: .documentDirectory,
                                     in: .userDomainMask,
                                     appropriateFor: nil,
                                     create: false)
-        .appendingPathComponent("feed.data")
+        .appendingPathComponent("\(feed.feedID).json")
     }
     
     func load() async throws {
-        let task = Task<[LogEntry], Error> {
+        let task = Task<Feed, Error> {
-            let fileURL = try Self.fileURL()
+            let fileURL = try self.fileURL()
             guard let data = try? Data(contentsOf: fileURL) else {
-                return []
+                return Feed()
             }
-            let logEntries = try JSONDecoder().decode([LogEntry].self, from: data)
+            let feed = try JSONDecoder().decode(Feed.self, from: data)
-            return logEntries
+            return feed
         }
         let feed = try await task.value
         self.feed = feed
     }
     
-    func save(feed: [LogEntry]) async throws {
+    func save(feed: Feed) async throws {
         let task = Task {
             let data = try JSONEncoder().encode(feed)
-            let outfile = try Self.fileURL()
+            let outfile = try self.fileURL()
             try data.write(to: outfile)
         }
         _ = try await task.value