Fix model, delete if necessary

Sesame/Common/Extensions/App+Extensions.swift

@@ -0,0 +1,37 @@
+import SwiftUI
+import SwiftData
+
+extension App {
+    
+    static func loadModelContainer() -> ModelContainer {
+        do {
+            return try ModelContainer(for: HistoryItem.self)
+        } catch {
+            print("[WARNING] Removing default SwiftData storage")
+            removeDefaultModelContainer()
+        }
+        // Try again to load an empty container
+        do {
+            return try ModelContainer(for: HistoryItem.self)
+        } catch {
+            fatalError("Failed to create empty model container: \(error)")
+        }
+    }
+    
+    private static func removeDefaultModelContainer() {
+        guard let appSupportDir = FileManager.default.urls(for: .applicationSupportDirectory, in: .userDomainMask).last else {
+            fatalError("Failed to get application support directory")
+        }
+        do {
+            try FileManager.default.contentsOfDirectory(at: appSupportDir, includingPropertiesForKeys: nil)
+                .filter { $0.lastPathComponent.hasPrefix("default") }
+                .forEach {
+                try FileManager.default.removeItem(at: $0)
+            }
+        } catch {
+            print(error)
+            fatalError("Failed to remove default SwiftData database files")
+        }
+    }
+    
+}

Sesame/History/HistoryItem.swift

@@ -6,7 +6,7 @@ final class HistoryItem {
     
     let startDate: Date
     
-    let message: Message
+    let message: HistoryMessage
     
     let route: TransmissionType
     
@@ -14,7 +14,11 @@ final class HistoryItem {
     
     init(message: Message, startDate: Date, route: TransmissionType, finishDate: Date) {
         self.startDate = startDate
-        self.message = message
+        self.message = .init(
+            messageType: message.messageType,
+            clientChallenge: Int(message.clientChallenge),
+            serverChallenge: Int(message.serverChallenge),
+            result: message.result)
         self.finishDate = finishDate
         self.route = route
     }
@@ -28,6 +32,59 @@ final class HistoryItem {
     }
 }
 
+struct HistoryMessage {
+        
+        /// The type of message being sent.
+        let messageType: MessageType
+        
+        /**
+         * The random nonce created by the remote
+         *
+         * This nonce is a random number created by the remote, different for each unlock request.
+         * It is set for all message types.
+         */
+        let clientChallenge: Int
+        
+        /**
+         * A random number to sign by the remote
+         *
+         * This nonce is set by the server after receiving an initial message.
+         * It is set for the message types `challenge`, `request`, and `response`.
+         */
+        let serverChallenge: Int
+        
+        /**
+         * The response status for the previous message.
+         *
+         * It is set only for messages from the server, e.g. the `challenge` and `response` message types.
+         * Must be set to `MessageAccepted` for other messages.
+         */
+        let result: MessageResult
+    }
+
+extension HistoryMessage: Encodable {
+    
+    func encode(to encoder: Encoder) throws {
+        var container = encoder.unkeyedContainer()
+        try container.encode(messageType)
+        try container.encode(clientChallenge)
+        try container.encode(serverChallenge)
+        try container.encode(result)
+    }
+}
+
+extension HistoryMessage: Decodable {
+    
+    init(from decoder: Decoder) throws {
+        var container = try decoder.unkeyedContainer()
+        self.messageType = try container.decode(MessageType.self)
+        self.clientChallenge = try container.decode(Int.self)
+        self.serverChallenge = try container.decode(Int.self)
+        self.result = try container.decode(MessageResult.self)
+    }
+}
+
+
 extension HistoryItem: Identifiable {
     
     var id: Double {

Sesame/SesameApp.swift

@@ -8,11 +8,7 @@ struct SesameApp: App {
     var modelContainer: ModelContainer
     
     init() {
-        do {
-            self.modelContainer = try ModelContainer(for: HistoryItem.self)
-        } catch {
-            fatalError("Failed to create model container: \(error)")
-        }
+        self.modelContainer = SesameApp.loadModelContainer()
     }
     
     var body: some Scene {