Delete history, allow retry

2023-08-14 10:39:29 +02:00 · 2023-08-14 10:39:29 +02:00 · 7a443d51b3
commit 7a443d51b3
parent 95ece1ddcc
26 changed files with 440 additions and 220 deletions
--- a/Banner.key
+++ b/Banner.key
--- a/App/ComplicationController.swift
+++ b/App/ComplicationController.swift
@ -1,10 +0,0 @@
-import Foundation
-import ClockKit
-
-
-class ComplicationController: NSObject, CLKComplicationDataSource {
-
-    func getCurrentTimelineEntry(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTimelineEntry?) -> Void) {
-        // TODO: Finish implementing this required method.
-    }
-}
--- a/App/ContentView.swift
+++ b/App/ContentView.swift
@ -7,6 +7,9 @@ struct ContentView: View {
    @Binding
    var didLaunchFromComplication: Bool

+    @AppStorage("connectionType")
+    var connectionType: ConnectionStrategy = .remoteFirst
+    
    @AppStorage("server")
    var serverPath: String = "https://christophhagen.de/sesame/"
    
@ -19,15 +22,15 @@ struct ContentView: View {
    @AppStorage("compensate")
    var isCompensatingDaylightTime: Bool = false
    
-    @AppStorage("local")
-    private var useLocalConnection = false
-    
    @AppStorage("deviceId")
    private var deviceId: Int = 0
    
    @EnvironmentObject
    var keyManager: KeyManagement

+    @EnvironmentObject
+    var history: HistoryManager
+    
    @State
    var state: ClientState = .noKeyAvailable

@ -36,7 +39,32 @@ struct ContentView: View {
    
    let server = Client()

-    let history = HistoryManager()
+    private var firstTryIsLocalConnection: Bool {
+        switch connectionType {
+        case .local, .localFirst:
+            return true
+        case .remote, .remoteFirst:
+            return false
+        }
+    }
+
+    private var hasSecondTry: Bool {
+        switch connectionType {
+        case .localFirst, .remoteFirst:
+            return true
+        default:
+            return false
+        }
+    }
+
+    private var secondTryIsLocalConnection: Bool {
+        switch connectionType {
+        case .local, .localFirst:
+            return false
+        case .remote, .remoteFirst:
+            return true
+        }
+    }

    var buttonBackground: Color {
        state.allowsAction ?
@ -87,45 +115,42 @@ struct ContentView: View {
    }
    
    func mainButtonPressed() {
-        guard let key = keyManager.get(.remoteKey),
-              let token = keyManager.get(.authToken)?.data,
+        guard let keys = keyManager.getAllKeys(),
              let deviceId = UInt8(exactly: deviceId) else {
            return
        }
-        let count = UInt32(nextMessageCounter)
-        let sentTime = Date()
-        // Add time to compensate that the device is using daylight savings time
-        let timeCompensation: UInt32 = isCompensatingDaylightTime ? 3600 : 0
-        let content = Message.Content(
-            time: sentTime.timestamp + timeCompensation,
-            id: count,
-            device: deviceId)
-        let message = content.authenticate(using: key)
-        let historyItem = HistoryItem(sent: message.content, date: sentTime, local: useLocalConnection)
-        preventStateReset()
-        state = .waitingForResponse
-        print("Sending message \(count)")
-        Task {
-            let (newState, responseMessage) = await send(message, authToken: token)
-            let receivedTime = Date.now
-            state = newState
-            scheduleStateReset()
-            let finishedItem = historyItem.didReceive(response: newState, date: receivedTime, message: responseMessage?.content)
-            guard let key = keyManager.get(.deviceKey) else {
-                save(historyItem: finishedItem.notAuthenticated())
-                return
-            }
-            guard let responseMessage else {
-                save(historyItem: finishedItem)
-                return
-            }
-            guard responseMessage.isValid(using: key) else {
-                save(historyItem: finishedItem.invalidated())
-                return
+        sendMessage(from: deviceId, using: keys, isFirstTry: true)
    }

-            nextMessageCounter = Int(responseMessage.content.id)
-            save(historyItem: finishedItem)
+    private func sendMessage(from deviceId: UInt8, using keys: KeySet, isFirstTry: Bool) {
+        preventStateReset()
+        state = .waitingForResponse
+        let localConnection = isFirstTry ? firstTryIsLocalConnection : secondTryIsLocalConnection
+        Task {
+            let response = await send(
+                count: UInt32(nextMessageCounter),
+                from: deviceId,
+                using: keys,
+                to: server,
+                over: localConnection,
+                while: isCompensatingDaylightTime,
+                localAddress: localAddress,
+                remoteAddress: serverPath)
+
+            DispatchQueue.main.async {
+                state = response.response
+                scheduleStateReset()
+                if let counter = response.responseMessage?.id {
+                    nextMessageCounter = Int(counter)
+                }
+            }
+            save(historyItem: response)
+            guard isFirstTry, hasSecondTry else {
+                return
+            }
+            DispatchQueue.main.async {
+                sendMessage(from: deviceId, using: keys, isFirstTry: false)
+            }
        }
    }

@ -148,14 +173,6 @@ struct ContentView: View {
        preventStateReset()
    }
    
-    private func send(_ message: Message, authToken: Data) async -> (state: ClientState, response: Message?) {
-        if useLocalConnection {
-            return await server.sendMessageOverLocalNetwork(message, server: localAddress)
-        } else {
-            return await server.send(message, server: serverPath, authToken: authToken)
-        }
-    }
-    
    private func save(historyItem: HistoryItem) {
        do {
            try history.save(item: historyItem)
@ -165,9 +182,48 @@ struct ContentView: View {
    }
 }

+private func send(count: UInt32, from deviceId: UInt8, using keys: KeySet, to server: Client, over localConnection: Bool, while compensatingTime: Bool, localAddress: String, remoteAddress: String) async -> HistoryItem {
+    let sentTime = Date()
+    // Add time to compensate that the device is using daylight savings time
+    let timeCompensation: UInt32 = compensatingTime ? 3600 : 0
+    let content = Message.Content(
+        time: sentTime.timestamp + timeCompensation,
+        id: count,
+        device: deviceId)
+    let message = content.authenticate(using: keys.remote)
+    print("Sending message \(count)")
+    let address = localConnection ? localAddress : remoteAddress
+    let (newState, responseMessage) = await send(message, to: server, using: keys.server, local: localConnection, address: address)
+    var historyItem = HistoryItem(
+        sent: message.content,
+        sentDate: sentTime,
+        local: localConnection,
+        response: newState,
+        responseDate: .now,
+        responseMessage: responseMessage?.content)
+
+    guard let responseMessage else {
+        return historyItem
+    }
+    guard responseMessage.isValid(using: keys.device) else {
+        historyItem.response = .responseRejected(.invalidAuthentication)
+        return historyItem
+    }
+    return historyItem
+}
+
+private func send(_ message: Message, to server: Client, using authToken: Data, local: Bool, address: String) async -> (state: ClientState, response: Message?) {
+    if local {
+        return await server.sendMessageOverLocalNetwork(message, server: address)
+    } else {
+        return await server.send(message, server: address, authToken: authToken)
+    }
+}
+
 struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView(didLaunchFromComplication: .constant(false))
            .environmentObject(KeyManagement())
+            .environmentObject(HistoryManager())
    }
 }
--- a/App/HistoryItemDetail.swift
+++ b/App/HistoryItemDetail.swift
@ -13,6 +13,10 @@ struct HistoryItemDetail: View {

    let item: HistoryItem

+    let history: HistoryManagerProtocol
+
+    @Environment(\.dismiss) private var dismiss
+    
    private var entryTime: String {
        df.string(from: item.requestDate)
    }
@ -33,7 +37,7 @@ struct HistoryItemDetail: View {
        List {
            SettingsListTextItem(
                title: "Status",
-                value: item.response?.description ?? "No response")
+                value: item.response.description)
            SettingsListTextItem(
                title: "Date",
                value: entryTime)
@ -46,22 +50,41 @@ struct HistoryItemDetail: View {
            SettingsListTextItem(
                title: "Message Counter",
                value: counterText)
-            if let time = item.roundTripTime {
            SettingsListTextItem(
                    title: "Round Trip Time",
-                    value: "\(Int(time * 1000)) ms")
-            }
+                    value: "\(Int(item.roundTripTime * 1000)) ms")
            if let offset = item.clockOffset {
                SettingsListTextItem(
                    title: "Clock offset",
                    value: "\(offset) seconds")
            }
+            Button {
+                delete(item: item)
+            } label: {
+                HStack {
+                    Spacer()
+                    Label("Delete", systemSymbol: .trash)
+                    Spacer()
+                }
+            }
+            .listRowBackground(
+                RoundedRectangle(cornerSize: CGSize(width: 8, height: 8))
+                    .fill(.red)
+            )
+            .foregroundColor(.white)
        }.navigationTitle("Details")
    }
+
+    private func delete(item: HistoryItem) {
+        guard history.delete(item: item) else {
+            return
+        }
+        dismiss()
+    }
 }

 struct HistoryItemDetail_Previews: PreviewProvider {
    static var previews: some View {
-        HistoryItemDetail(item: .mock)
+        HistoryItemDetail(item: .mock, history: HistoryManagerMock())
    }
 }
--- a/App/HistoryListRow.swift
+++ b/App/HistoryListRow.swift
@ -20,10 +20,11 @@ struct HistoryListRow: View {
    var body: some View {
        VStack(alignment: .leading) {
            HStack {
-                Image(systemSymbol: item.response?.symbol ?? .exclamationmarkTriangle)
-                Text(item.response?.description ?? "No response")
+                Image(systemSymbol: item.response.symbol)
+                Text(item.response.description)
                    .font(.headline)
                    .foregroundColor(.primary)
+                Spacer()
            }
            Text(entryTime)
                .font(.footnote)
--- a/App/HistoryView.swift
+++ b/App/HistoryView.swift
@ -2,36 +2,66 @@ import SwiftUI

 struct HistoryView: View {

-    let history: HistoryManagerProtocol
+    @ObservedObject
+    var history: HistoryManager

-    @State
-    private var items: [HistoryItem] = []
+    private var unlockCount: Int {
+        history.entries.count {
+            $0.response == .openSesame
+        }
+    }
+
+    private var percentage: Double {
+        guard history.entries.count > 0 else {
+            return 0
+        }
+        return Double(unlockCount * 100) / Double(history.entries.count)
+    }

    var body: some View {
-        NavigationStack {
-            List(items) { item in
+        NavigationView {
+            List {
+                HStack {
+                    VStack(alignment: .leading) {
+                        Text("\(history.entries.count) requests")
+                            .foregroundColor(.primary)
+                            .font(.body)
+                        Text(String(format: "%.1f %% success", percentage))
+                            .foregroundColor(.secondary)
+                            .font(.footnote)
+                    }
+                    Spacer()
+                }
+                .listRowBackground(Color.clear)
+
+                ForEach(history.entries) { item in
                    NavigationLink {
-                    HistoryItemDetail(item: item)
+                        HistoryItemDetail(item: item, history: history)
                    } label: {
                        HistoryListRow(item: item)
                    }
+                    .swipeActions(edge: .trailing) {
+                        Button {
+                            delete(item: item)
+                        } label: {
+                            Label("Delete", systemSymbol: .trash)
+                        }.tint(.red)
+                    }
+                }
            }
            .navigationTitle("History")
-        }.onAppear(perform: loadItems)
+        }
    }

-    private func loadItems() {
-        Task {
-            let entries = history.loadEntries()
-            DispatchQueue.main.async {
-                items = entries
-            }
+    private func delete(item: HistoryItem) {
+        guard history.delete(item: item) else {
+            return
        }
    }
 }

 struct HistoryView_Previews: PreviewProvider {
    static var previews: some View {
-        HistoryView(history: HistoryManagerMock())
+        HistoryView(history: HistoryManager())
    }
 }
--- a/Assets.xcassets/Contents.json
+++ b/Assets.xcassets/Contents.json
@ -1,6 +0,0 @@
-{
-  "info" : {
-    "author" : "xcode",
-    "version" : 1
-  }
-}
--- a/App/Sesame_WatchApp.swift
+++ b/App/Sesame_WatchApp.swift
@ -5,6 +5,8 @@ struct Sesame_Watch_Watch_AppApp: App {
    
    let keyManagement = KeyManagement()

+    let history = HistoryManager()
+
    @State
    var selected: Int = 0

@ -16,11 +18,12 @@ struct Sesame_Watch_Watch_AppApp: App {
            TabView(selection: $selected) {
                ContentView(didLaunchFromComplication: $didLaunchFromComplication)
                    .environmentObject(keyManagement)
+                    .environmentObject(history)
                    .tag(1)
                SettingsView()
                    .environmentObject(keyManagement)
                    .tag(2)
-                HistoryView(history: HistoryManager())
+                HistoryView(history: history)
                    .tag(3)
            }
            .tabViewStyle(PageTabViewStyle())
--- a/App/Settings/SettingsTextItemLink.swift
+++ b/App/Settings/SettingsTextItemLink.swift
@ -20,6 +20,7 @@ struct SettingsTextItemLink: View {
            SettingsListTextItem(title: title, value: value)
        }
        .buttonStyle(PlainButtonStyle())
+        .padding(0)
    }
 }

--- a/App/SettingsView.swift
+++ b/App/SettingsView.swift
@ -2,6 +2,9 @@ import SwiftUI

 struct SettingsView: View {

+    @AppStorage("connectionType")
+    var connectionType: ConnectionStrategy = .remoteFirst
+
    @AppStorage("server")
    var serverPath: String = "https://christophhagen.de/sesame/"

@ -14,9 +17,6 @@ struct SettingsView: View {
    @AppStorage("compensate")
    var isCompensatingDaylightTime: Bool = false

-    @AppStorage("local")
-    private var useLocalConnection = false
-
    @AppStorage("deviceId")
    private var deviceId: Int = 0

@ -26,6 +26,17 @@ struct SettingsView: View {
    var body: some View {
        NavigationStack {
            List {
+                Picker("Connection", selection: $connectionType) {
+                    Text(ConnectionStrategy.local.rawValue)
+                        .tag(ConnectionStrategy.local)
+                    Text(ConnectionStrategy.localFirst.rawValue)
+                        .tag(ConnectionStrategy.localFirst)
+                    Text(ConnectionStrategy.remote.rawValue)
+                        .tag(ConnectionStrategy.remote)
+                    Text(ConnectionStrategy.remoteFirst.rawValue)
+                        .tag(ConnectionStrategy.remoteFirst)
+                }
+                .padding(.leading)
                SettingsTextItemLink(
                    title: "Server url",
                    value: $serverPath,
@ -34,10 +45,6 @@ struct SettingsView: View {
                    title: "Local url",
                    value: $localAddress,
                    footnote: "The url where the device can be reached directly on the local WiFi network.")
-                SettingsListToggleItem(
-                    title: "Local connection",
-                    value: $useLocalConnection,
-                    subtitle: "Attempt to communicate directly with the device, which requires a WiFi connection on the same network.")
                SettingsNumberItemLink(
                    title: "Device ID",
                    value: $deviceId,
--- a/Sesame.xcodeproj/project.pbxproj
+++ b/Sesame.xcodeproj/project.pbxproj
@ -10,7 +10,6 @@
 		884A45B7279F48C100D6E650 /* SesameApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 884A45B6279F48C100D6E650 /* SesameApp.swift */; };
 		884A45B9279F48C100D6E650 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 884A45B8279F48C100D6E650 /* ContentView.swift */; };
 		884A45BB279F48C300D6E650 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 884A45BA279F48C300D6E650 /* Assets.xcassets */; };
-		884A45BE279F48C300D6E650 /* Preview Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 884A45BD279F48C300D6E650 /* Preview Assets.xcassets */; };
 		884A45C5279F4BBE00D6E650 /* KeyManagement.swift in Sources */ = {isa = PBXBuildFile; fileRef = 884A45C4279F4BBE00D6E650 /* KeyManagement.swift */; };
 		884A45C927A43D7900D6E650 /* ClientState.swift in Sources */ = {isa = PBXBuildFile; fileRef = 884A45C827A43D7900D6E650 /* ClientState.swift */; };
 		884A45CB27A464C000D6E650 /* SymmetricKey+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 884A45CA27A464C000D6E650 /* SymmetricKey+Extensions.swift */; };
@ -22,7 +21,6 @@
 		88E197B229EDC9BC00BF1D19 /* Sesame_WatchApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 88E197B129EDC9BC00BF1D19 /* Sesame_WatchApp.swift */; };
 		88E197B429EDC9BC00BF1D19 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 88E197B329EDC9BC00BF1D19 /* ContentView.swift */; };
 		88E197B629EDC9BD00BF1D19 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 88E197B529EDC9BD00BF1D19 /* Assets.xcassets */; };
-		88E197B929EDC9BD00BF1D19 /* Preview Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 88E197B829EDC9BD00BF1D19 /* Preview Assets.xcassets */; };
 		88E197C429EDCC8900BF1D19 /* Client.swift in Sources */ = {isa = PBXBuildFile; fileRef = 884A45CC27A465F500D6E650 /* Client.swift */; };
 		88E197C729EDCCBD00BF1D19 /* Client.swift in Sources */ = {isa = PBXBuildFile; fileRef = 884A45CC27A465F500D6E650 /* Client.swift */; };
 		88E197C829EDCCCE00BF1D19 /* ClientState.swift in Sources */ = {isa = PBXBuildFile; fileRef = 884A45C827A43D7900D6E650 /* ClientState.swift */; };
@ -37,7 +35,6 @@
 		88E197D529EDCE8800BF1D19 /* ServerMessage.swift in Sources */ = {isa = PBXBuildFile; fileRef = E2C5C1F7281E769F00769EF6 /* ServerMessage.swift */; };
 		88E197D729EDCFE800BF1D19 /* Date+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 88E197D629EDCFE800BF1D19 /* Date+Extensions.swift */; };
 		88E197D829EDD13B00BF1D19 /* SymmetricKey+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 884A45CA27A464C000D6E650 /* SymmetricKey+Extensions.swift */; };
-		88E197D929EDD14D00BF1D19 /* HistoryItem.swift in Sources */ = {isa = PBXBuildFile; fileRef = E28DED34281EB17600259690 /* HistoryItem.swift */; };
 		E240654B2A8153C6009C1AD8 /* SettingsListTextItem.swift in Sources */ = {isa = PBXBuildFile; fileRef = E240654A2A8153C6009C1AD8 /* SettingsListTextItem.swift */; };
 		E240654D2A8155A3009C1AD8 /* SettingsListToggleItem.swift in Sources */ = {isa = PBXBuildFile; fileRef = E240654C2A8155A3009C1AD8 /* SettingsListToggleItem.swift */; };
 		E240654F2A8159B7009C1AD8 /* SettingsTextInputView.swift in Sources */ = {isa = PBXBuildFile; fileRef = E240654E2A8159B7009C1AD8 /* SettingsTextInputView.swift */; };
@ -54,7 +51,9 @@
 		E24EE77427FF95920011CFD2 /* DeviceResponse.swift in Sources */ = {isa = PBXBuildFile; fileRef = E24EE77327FF95920011CFD2 /* DeviceResponse.swift */; };
 		E24EE77727FF95C00011CFD2 /* NIOCore in Frameworks */ = {isa = PBXBuildFile; productRef = E24EE77627FF95C00011CFD2 /* NIOCore */; };
 		E24EE77927FF95E00011CFD2 /* Message.swift in Sources */ = {isa = PBXBuildFile; fileRef = E24EE77827FF95E00011CFD2 /* Message.swift */; };
-		E268E04D2A852AFE00185913 /* ComplicationController.swift in Sources */ = {isa = PBXBuildFile; fileRef = E268E04C2A852AFE00185913 /* ComplicationController.swift */; };
+		E24F6C6E2A89749A0040F8C4 /* ConnectionStrategy.swift in Sources */ = {isa = PBXBuildFile; fileRef = E24F6C6D2A89749A0040F8C4 /* ConnectionStrategy.swift */; };
+		E24F6C6F2A8974C60040F8C4 /* ConnectionStrategy.swift in Sources */ = {isa = PBXBuildFile; fileRef = E24F6C6D2A89749A0040F8C4 /* ConnectionStrategy.swift */; };
+		E25317562A8A1ABF005A537D /* HistoryItem.swift in Sources */ = {isa = PBXBuildFile; fileRef = E28DED34281EB17600259690 /* HistoryItem.swift */; };
 		E268E0822A85302000185913 /* WidgetKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = E268E0532A852F8E00185913 /* WidgetKit.framework */; };
 		E268E0832A85302000185913 /* SwiftUI.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = E268E0552A852F8E00185913 /* SwiftUI.framework */; };
 		E268E0862A85302000185913 /* Sesame_Widget.swift in Sources */ = {isa = PBXBuildFile; fileRef = E268E0852A85302000185913 /* Sesame_Widget.swift */; };
@ -70,6 +69,8 @@
 		E2C5C1DB2806FE8900769EF6 /* RouteAPI.swift in Sources */ = {isa = PBXBuildFile; fileRef = E2C5C1DA2806FE8900769EF6 /* RouteAPI.swift */; };
 		E2C5C1DD281B3AC400769EF6 /* UInt32+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = E2C5C1DC281B3AC400769EF6 /* UInt32+Extensions.swift */; };
 		E2C5C1F8281E769F00769EF6 /* ServerMessage.swift in Sources */ = {isa = PBXBuildFile; fileRef = E2C5C1F7281E769F00769EF6 /* ServerMessage.swift */; };
+		E2F5DCCA2A88E913002858B9 /* Array+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = E2F5DCC92A88E913002858B9 /* Array+Extensions.swift */; };
+		E2F5DCCB2A88E976002858B9 /* Array+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = E2F5DCC92A88E913002858B9 /* Array+Extensions.swift */; };
 /* End PBXBuildFile section */

 /* Begin PBXContainerItemProxy section */
@ -101,7 +102,6 @@
 		884A45B6279F48C100D6E650 /* SesameApp.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SesameApp.swift; sourceTree = "<group>"; };
 		884A45B8279F48C100D6E650 /* ContentView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ContentView.swift; sourceTree = "<group>"; };
 		884A45BA279F48C300D6E650 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
-		884A45BD279F48C300D6E650 /* Preview Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = "Preview Assets.xcassets"; sourceTree = "<group>"; };
 		884A45C4279F4BBE00D6E650 /* KeyManagement.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = KeyManagement.swift; sourceTree = "<group>"; };
 		884A45C827A43D7900D6E650 /* ClientState.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ClientState.swift; sourceTree = "<group>"; };
 		884A45CA27A464C000D6E650 /* SymmetricKey+Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "SymmetricKey+Extensions.swift"; sourceTree = "<group>"; };
@ -113,7 +113,6 @@
 		88E197B129EDC9BC00BF1D19 /* Sesame_WatchApp.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Sesame_WatchApp.swift; sourceTree = "<group>"; };
 		88E197B329EDC9BC00BF1D19 /* ContentView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ContentView.swift; sourceTree = "<group>"; };
 		88E197B529EDC9BD00BF1D19 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
-		88E197B829EDC9BD00BF1D19 /* Preview Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = "Preview Assets.xcassets"; sourceTree = "<group>"; };
 		88E197D629EDCFE800BF1D19 /* Date+Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Date+Extensions.swift"; sourceTree = "<group>"; };
 		E240654A2A8153C6009C1AD8 /* SettingsListTextItem.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SettingsListTextItem.swift; sourceTree = "<group>"; };
 		E240654C2A8155A3009C1AD8 /* SettingsListToggleItem.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SettingsListToggleItem.swift; sourceTree = "<group>"; };
@ -128,7 +127,7 @@
 		E24EE77127FDCCC00011CFD2 /* Data+Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Data+Extensions.swift"; sourceTree = "<group>"; };
 		E24EE77327FF95920011CFD2 /* DeviceResponse.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DeviceResponse.swift; sourceTree = "<group>"; };
 		E24EE77827FF95E00011CFD2 /* Message.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Message.swift; sourceTree = "<group>"; };
-		E268E04C2A852AFE00185913 /* ComplicationController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ComplicationController.swift; sourceTree = "<group>"; };
+		E24F6C6D2A89749A0040F8C4 /* ConnectionStrategy.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ConnectionStrategy.swift; sourceTree = "<group>"; };
 		E268E0532A852F8E00185913 /* WidgetKit.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = WidgetKit.framework; path = System/Library/Frameworks/WidgetKit.framework; sourceTree = SDKROOT; };
 		E268E0552A852F8E00185913 /* SwiftUI.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = SwiftUI.framework; path = System/Library/Frameworks/SwiftUI.framework; sourceTree = SDKROOT; };
 		E268E0812A85302000185913 /* Sesame-WidgetExtension.appex */ = {isa = PBXFileReference; explicitFileType = "wrapper.app-extension"; includeInIndex = 0; path = "Sesame-WidgetExtension.appex"; sourceTree = BUILT_PRODUCTS_DIR; };
@ -145,6 +144,7 @@
 		E2C5C1DA2806FE8900769EF6 /* RouteAPI.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RouteAPI.swift; sourceTree = "<group>"; };
 		E2C5C1DC281B3AC400769EF6 /* UInt32+Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UInt32+Extensions.swift"; sourceTree = "<group>"; };
 		E2C5C1F7281E769F00769EF6 /* ServerMessage.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ServerMessage.swift; sourceTree = "<group>"; };
+		E2F5DCC92A88E913002858B9 /* Array+Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Array+Extensions.swift"; sourceTree = "<group>"; };
 /* End PBXFileReference section */

 /* Begin PBXFrameworksBuildPhase section */
@ -206,36 +206,24 @@
 			isa = PBXGroup;
 			children = (
 				E28DED38281EE9CF00259690 /* Info.plist */,
+				884A45BA279F48C300D6E650 /* Assets.xcassets */,
+				E24F6C6C2A89748B0040F8C4 /* Common */,
 				E2C5C1D92806FE4A00769EF6 /* API */,
 				884A45B6279F48C100D6E650 /* SesameApp.swift */,
 				884A45B8279F48C100D6E650 /* ContentView.swift */,
-				E28DED30281EAE9100259690 /* HistoryView.swift */,
-				E28DED32281EB15B00259690 /* HistoryListItem.swift */,
-				E28DED34281EB17600259690 /* HistoryItem.swift */,
-				E28DED36281EC7FB00259690 /* HistoryManager.swift */,
 				E28DED2C281E840B00259690 /* SettingsView.swift */,
 				E28DED2E281E8A0500259690 /* SingleKeyView.swift */,
-				884A45C827A43D7900D6E650 /* ClientState.swift */,
-				884A45CC27A465F500D6E650 /* Client.swift */,
-				884A45C4279F4BBE00D6E650 /* KeyManagement.swift */,
-				884A45CA27A464C000D6E650 /* SymmetricKey+Extensions.swift */,
-				884A45BA279F48C300D6E650 /* Assets.xcassets */,
-				884A45BC279F48C300D6E650 /* Preview Content */,
+				E28DED30281EAE9100259690 /* HistoryView.swift */,
+				E25317542A8A1A07005A537D /* History */,
+				E25317552A8A1A32005A537D /* Extensions */,
 			);
 			path = Sesame;
 			sourceTree = "<group>";
 		};
-		884A45BC279F48C300D6E650 /* Preview Content */ = {
-			isa = PBXGroup;
-			children = (
-				884A45BD279F48C300D6E650 /* Preview Assets.xcassets */,
-			);
-			path = "Preview Content";
-			sourceTree = "<group>";
-		};
 		88E197B029EDC9BC00BF1D19 /* Sesame-Watch Watch App */ = {
 			isa = PBXGroup;
 			children = (
+				88E197B529EDC9BD00BF1D19 /* Assets.xcassets */,
 				E24065562A819AAD009C1AD8 /* Settings */,
 				88E197B129EDC9BC00BF1D19 /* Sesame_WatchApp.swift */,
 				88E197B329EDC9BC00BF1D19 /* ContentView.swift */,
@ -243,22 +231,11 @@
 				888362352A80F4420032BBB2 /* HistoryView.swift */,
 				E240655D2A822E97009C1AD8 /* HistoryListRow.swift */,
 				E240655F2A822ED9009C1AD8 /* HistoryItemDetail.swift */,
-				88E197B529EDC9BD00BF1D19 /* Assets.xcassets */,
-				88E197B729EDC9BD00BF1D19 /* Preview Content */,
 				88E197D629EDCFE800BF1D19 /* Date+Extensions.swift */,
-				E268E04C2A852AFE00185913 /* ComplicationController.swift */,
 			);
 			path = "Sesame-Watch Watch App";
 			sourceTree = "<group>";
 		};
-		88E197B729EDC9BD00BF1D19 /* Preview Content */ = {
-			isa = PBXGroup;
-			children = (
-				88E197B829EDC9BD00BF1D19 /* Preview Assets.xcassets */,
-			);
-			path = "Preview Content";
-			sourceTree = "<group>";
-		};
 		88E197CA29EDCD4900BF1D19 /* Frameworks */ = {
 			isa = PBXGroup;
 			children = (
@ -283,12 +260,42 @@
 			path = Settings;
 			sourceTree = "<group>";
 		};
+		E24F6C6C2A89748B0040F8C4 /* Common */ = {
+			isa = PBXGroup;
+			children = (
+				884A45CC27A465F500D6E650 /* Client.swift */,
+				884A45C827A43D7900D6E650 /* ClientState.swift */,
+				E24F6C6D2A89749A0040F8C4 /* ConnectionStrategy.swift */,
+				E28DED36281EC7FB00259690 /* HistoryManager.swift */,
+				884A45C4279F4BBE00D6E650 /* KeyManagement.swift */,
+			);
+			path = Common;
+			sourceTree = "<group>";
+		};
+		E25317542A8A1A07005A537D /* History */ = {
+			isa = PBXGroup;
+			children = (
+				E28DED32281EB15B00259690 /* HistoryListItem.swift */,
+				E28DED34281EB17600259690 /* HistoryItem.swift */,
+			);
+			path = History;
+			sourceTree = "<group>";
+		};
+		E25317552A8A1A32005A537D /* Extensions */ = {
+			isa = PBXGroup;
+			children = (
+				E2F5DCC92A88E913002858B9 /* Array+Extensions.swift */,
+				884A45CA27A464C000D6E650 /* SymmetricKey+Extensions.swift */,
+			);
+			path = Extensions;
+			sourceTree = "<group>";
+		};
 		E268E0842A85302000185913 /* Sesame-Widget */ = {
 			isa = PBXGroup;
 			children = (
-				E268E0852A85302000185913 /* Sesame_Widget.swift */,
-				E268E0872A85302000185913 /* Assets.xcassets */,
 				E268E0892A85302000185913 /* Info.plist */,
+				E268E0872A85302000185913 /* Assets.xcassets */,
+				E268E0852A85302000185913 /* Sesame_Widget.swift */,
 			);
 			path = "Sesame-Widget";
 			sourceTree = "<group>";
@ -428,7 +435,6 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				884A45BE279F48C300D6E650 /* Preview Assets.xcassets in Resources */,
 				884A45BB279F48C300D6E650 /* Assets.xcassets in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@ -437,7 +443,6 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				88E197B929EDC9BD00BF1D19 /* Preview Assets.xcassets in Resources */,
 				88E197B629EDC9BD00BF1D19 /* Assets.xcassets in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@ -468,12 +473,14 @@
 				884A45CB27A464C000D6E650 /* SymmetricKey+Extensions.swift in Sources */,
 				E28DED31281EAE9100259690 /* HistoryView.swift in Sources */,
 				E24EE77927FF95E00011CFD2 /* Message.swift in Sources */,
+				E2F5DCCA2A88E913002858B9 /* Array+Extensions.swift in Sources */,
 				E28DED35281EB17600259690 /* HistoryItem.swift in Sources */,
 				884A45C927A43D7900D6E650 /* ClientState.swift in Sources */,
 				E28DED33281EB15B00259690 /* HistoryListItem.swift in Sources */,
 				E28DED2D281E840B00259690 /* SettingsView.swift in Sources */,
 				884A45B7279F48C100D6E650 /* SesameApp.swift in Sources */,
 				88E197C429EDCC8900BF1D19 /* Client.swift in Sources */,
+				E24F6C6E2A89749A0040F8C4 /* ConnectionStrategy.swift in Sources */,
 				884A45C5279F4BBE00D6E650 /* KeyManagement.swift in Sources */,
 				E2C5C1F8281E769F00769EF6 /* ServerMessage.swift in Sources */,
 			);
@ -485,6 +492,7 @@
 			files = (
 				888362342A80F3F90032BBB2 /* SettingsView.swift in Sources */,
 				88E197B429EDC9BC00BF1D19 /* ContentView.swift in Sources */,
+				E2F5DCCB2A88E976002858B9 /* Array+Extensions.swift in Sources */,
 				E24065532A819614009C1AD8 /* SettingsNumberItemLink.swift in Sources */,
 				888362362A80F4420032BBB2 /* HistoryView.swift in Sources */,
 				E240654F2A8159B7009C1AD8 /* SettingsTextInputView.swift in Sources */,
@ -500,7 +508,7 @@
 				88E197B229EDC9BC00BF1D19 /* Sesame_WatchApp.swift in Sources */,
 				E24065582A819AE3009C1AD8 /* SettingsKeyItemLink.swift in Sources */,
 				88E197C929EDCCE100BF1D19 /* Message.swift in Sources */,
-				88E197D929EDD14D00BF1D19 /* HistoryItem.swift in Sources */,
+				E24F6C6F2A8974C60040F8C4 /* ConnectionStrategy.swift in Sources */,
 				E240654B2A8153C6009C1AD8 /* SettingsListTextItem.swift in Sources */,
 				88E197C729EDCCBD00BF1D19 /* Client.swift in Sources */,
 				88E197D429EDCE7600BF1D19 /* UInt32+Extensions.swift in Sources */,
@ -508,7 +516,7 @@
 				E240654D2A8155A3009C1AD8 /* SettingsListToggleItem.swift in Sources */,
 				E24065552A819663009C1AD8 /* SettingsNumberInputView.swift in Sources */,
 				E240655E2A822E97009C1AD8 /* HistoryListRow.swift in Sources */,
-				E268E04D2A852AFE00185913 /* ComplicationController.swift in Sources */,
+				E25317562A8A1ABF005A537D /* HistoryItem.swift in Sources */,
 				88E197D829EDD13B00BF1D19 /* SymmetricKey+Extensions.swift in Sources */,
 				E240655C2A822C8E009C1AD8 /* HistoryManager.swift in Sources */,
 			);
@ -657,7 +665,7 @@
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 1;
-				DEVELOPMENT_ASSET_PATHS = "\"Sesame/Preview Content\"";
+				DEVELOPMENT_ASSET_PATHS = "";
 				DEVELOPMENT_TEAM = H8WR4M6QQ4;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
@ -668,6 +676,7 @@
 				INFOPLIST_KEY_UISupportedInterfaceOrientations = UIInterfaceOrientationPortrait;
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = UIInterfaceOrientationPortrait;
+				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@ -691,7 +700,7 @@
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 1;
-				DEVELOPMENT_ASSET_PATHS = "\"Sesame/Preview Content\"";
+				DEVELOPMENT_ASSET_PATHS = "";
 				DEVELOPMENT_TEAM = H8WR4M6QQ4;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
@ -702,6 +711,7 @@
 				INFOPLIST_KEY_UISupportedInterfaceOrientations = UIInterfaceOrientationPortrait;
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = UIInterfaceOrientationPortrait;
+				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@ -725,7 +735,7 @@
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 1;
-				DEVELOPMENT_ASSET_PATHS = "\"Sesame-Watch Watch App/Preview Content\"";
+				DEVELOPMENT_ASSET_PATHS = "";
 				DEVELOPMENT_TEAM = H8WR4M6QQ4;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
@ -757,7 +767,7 @@
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 1;
-				DEVELOPMENT_ASSET_PATHS = "\"Sesame-Watch Watch App/Preview Content\"";
+				DEVELOPMENT_ASSET_PATHS = "";
 				DEVELOPMENT_TEAM = H8WR4M6QQ4;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
--- a/Sesame.xcodeproj/project.xcworkspace/xcuserdata/ch.xcuserdatad/UserInterfaceState.xcuserstate
+++ b/Sesame.xcodeproj/project.xcworkspace/xcuserdata/ch.xcuserdatad/UserInterfaceState.xcuserstate
--- a/Sesame/Common/Client.swift
+++ b/Sesame/Common/Client.swift
--- a/Sesame/Common/ClientState.swift
+++ b/Sesame/Common/ClientState.swift
--- a/Sesame/Common/ConnectionStrategy.swift
+++ b/Sesame/Common/ConnectionStrategy.swift
@ -0,0 +1,10 @@
+import Foundation
+
+enum ConnectionStrategy: String, CaseIterable, Identifiable {
+    case local = "Local"
+    case localFirst = "Local first"
+    case remote = "Remote"
+    case remoteFirst = "Remote first"
+
+    var id: Self { self }
+}
--- a/Sesame/Common/HistoryManager.swift
+++ b/Sesame/Common/HistoryManager.swift
@ -1,14 +1,22 @@
 import Foundation
 import CBORCoding

-protocol HistoryManagerProtocol {
+class HistoryManagerBase: ObservableObject {

-    func loadEntries() -> [HistoryItem]
-    
-    func save(item: HistoryItem) throws
+    @Published
+    var entries: [HistoryItem] = []
 }

-final class HistoryManager: HistoryManagerProtocol {
+protocol HistoryManagerProtocol: HistoryManagerBase {
+
+    var entries: [HistoryItem] { get }
+    
+    func save(item: HistoryItem) throws
+
+    func delete(item: HistoryItem) -> Bool
+}
+
+final class HistoryManager: HistoryManagerBase, HistoryManagerProtocol {
    
    private let encoder = CBOREncoder(dateEncodingStrategy: .secondsSince1970)

@ -25,11 +33,20 @@ final class HistoryManager: HistoryManagerProtocol {

    private let fileUrl: URL
    
-    init() {
+    override init() {
        self.fileUrl = HistoryManager.documentDirectory.appendingPathComponent("history2.bin")
+        super.init()
+        Task {
+            print("Loading history...")
+            let all = loadEntries()
+            DispatchQueue.main.async {
+                self.entries = all
+                print("History loaded (\(self.entries.count) entries)")
+            }
+        }
    }
    
-    func loadEntries() -> [HistoryItem] {
+    private func loadEntries() -> [HistoryItem] {
        guard fm.fileExists(atPath: fileUrl.path) else {
            print("No history data found")
            return []
@ -65,8 +82,7 @@ final class HistoryManager: HistoryManagerProtocol {
    }

    func save(item: HistoryItem) throws {
-        let entryData = try encoder.encode(item)
-        let data = Data([UInt8(entryData.count)]) + entryData
+        let data = try convertForStorage(item)
        guard fm.fileExists(atPath: fileUrl.path) else {
            try data.write(to: fileUrl)
            print("First history item written (\(data[0]))")
@ -78,15 +94,50 @@ final class HistoryManager: HistoryManagerProtocol {
        try handle.close()
        print("History item written (\(data[0]))")
    }
+
+    @discardableResult
+    func delete(item: HistoryItem) -> Bool {
+        let newItems = entries
+            .filter { $0 != item }
+
+        let data: FlattenSequence<[Data]>
+        do {
+            data = try newItems
+                .map(convertForStorage)
+                .joined()
+        } catch {
+            print("Failed to encode items: \(error)")
+            return false
+        }
+        do {
+            try Data(data).write(to: fileUrl)
+        } catch {
+            print("Failed to save items: \(error)")
+            return false
+        }
+        entries = newItems
+        return true
+    }
+
+    private func convertForStorage(_ item: HistoryItem) throws -> Data {
+        let entryData = try encoder.encode(item)
+        return Data([UInt8(entryData.count)]) + entryData
+    }
 }

-final class HistoryManagerMock: HistoryManagerProtocol {
+final class HistoryManagerMock: HistoryManagerBase, HistoryManagerProtocol {

-    func loadEntries() -> [HistoryItem] {
-        [.mock]
+    override init() {
+        super.init()
+        self.entries = [.mock]
    }
    
    func save(item: HistoryItem) throws {
+        entries.append(item)
+    }

+    func delete(item: HistoryItem) -> Bool {
+        entries = entries.filter { $0 != item }
+        return true
    }
 }
--- a/Sesame/Common/KeyManagement.swift
+++ b/Sesame/Common/KeyManagement.swift
@ -2,6 +2,15 @@ import Foundation
 import CryptoKit
 import SwiftUI

+struct KeySet {
+
+    let remote: SymmetricKey
+
+    let device: SymmetricKey
+
+    let server: Data
+}
+
 extension KeyManagement {

    enum KeyType: String, Identifiable, CaseIterable {
@ -82,6 +91,9 @@ private struct KeyChain {

        var item: CFTypeRef?
        let status = SecItemCopyMatching(query as CFDictionary, &item)
+        guard status != -25300 else {
+            return nil
+        }
        guard status == errSecSuccess else {
            print("Failed to get \(type): \(status)")
            return nil
@ -137,6 +149,15 @@ final class KeyManagement: ObservableObject {
        }
    }

+    func getAllKeys() -> KeySet? {
+        guard let remoteKey = get(.remoteKey),
+              let token = get(.authToken)?.data,
+              let deviceKey = get(.deviceKey) else {
+            return nil
+        }
+        return .init(remote: remoteKey, device: deviceKey, server: token)
+    }
+
    func get(_ type: KeyType) -> SymmetricKey? {
        keyChain.load(type)
    }
--- a/Sesame/ContentView.swift
+++ b/Sesame/ContentView.swift
@ -21,7 +21,7 @@ struct ContentView: View {
    @AppStorage("deviceID")
    private var deviceID: Int = 0

-    @State
+    @ObservedObject
    var keyManager = KeyManagement()

    let history = HistoryManager()
@ -133,7 +133,7 @@ struct ContentView: View {
            .animation(.easeInOut, value: state.color)
            .sheet(isPresented: $showSettingsSheet) {
                SettingsView(
-                    keyManager: $keyManager,
+                    keyManager: keyManager,
                    serverAddress: $serverPath,
                    localAddress: $localAddress,
                    deviceID: $deviceID,
@ -142,7 +142,7 @@ struct ContentView: View {
                    useLocalConnection: $useLocalConnection)
            }
            .sheet(isPresented: $showHistorySheet) {
-                HistoryView(manager: history)
+                HistoryView(history: history)
            }
        }
        .preferredColorScheme(.dark)
--- a/Sesame/Extensions/Array+Extensions.swift
+++ b/Sesame/Extensions/Array+Extensions.swift
@ -0,0 +1,14 @@
+import Foundation
+
+extension Array {
+
+    func count(where closure: (Element) -> Bool) -> Int {
+        var result = 0
+        forEach { element in
+            if closure(element) {
+                result += 1
+            }
+        }
+        return result
+    }
+}
--- a/Sesame/Extensions/SymmetricKey+Extensions.swift
+++ b/Sesame/Extensions/SymmetricKey+Extensions.swift
--- a/Sesame/History/HistoryItem.swift
+++ b/Sesame/History/HistoryItem.swift
@ -3,7 +3,6 @@ import Foundation

 struct HistoryItem {
    
-    
    /// The sent/received date (local time, not including compensation offset)
    let requestDate: Date

@ -11,46 +10,25 @@ struct HistoryItem {
    
    let usedLocalConnection: Bool
    
-    let response: ClientState?
+    var response: ClientState
    
    let responseMessage: Message.Content?
    
-    let responseDate: Date?
+    let responseDate: Date

-    init(sent message: Message.Content, date: Date, local: Bool) {
-        self.requestDate = date
+    init(sent message: Message.Content, sentDate: Date, local: Bool, response: ClientState, responseDate: Date, responseMessage: Message.Content?) {
+        self.requestDate = sentDate
        self.request = message
-        self.responseMessage = nil
-        self.response = nil
-        self.responseDate = nil
-        self.usedLocalConnection = local
-    }
-
-    func didReceive(response: ClientState, date: Date?, message: Message.Content?) -> HistoryItem {
-        .init(sent: self, response: response, date: date, message: message)
-    }
-
-    func invalidated() -> HistoryItem {
-        didReceive(response: .responseRejected(.invalidAuthentication), date: responseDate, message: responseMessage)
-    }
-
-    func notAuthenticated() -> HistoryItem {
-        didReceive(response: .responseRejected(.missingKey), date: responseDate, message: responseMessage)
-    }
-
-    private init(sent: HistoryItem, response: ClientState, date: Date?, message: Message.Content?) {
-        self.requestDate = sent.requestDate
-        self.request = sent.request
-        self.responseDate = date
-        self.responseMessage = message
+        self.responseMessage = responseMessage
        self.response = response
-        self.usedLocalConnection = sent.usedLocalConnection
+        self.responseDate = responseDate
+        self.usedLocalConnection = local
    }

    // MARK: Statistics

-    var roundTripTime: TimeInterval? {
-        responseDate?.timeIntervalSince(requestDate)
+    var roundTripTime: TimeInterval {
+        responseDate.timeIntervalSince(requestDate)
    }

    var deviceTime: Date? {
@ -68,14 +46,14 @@ struct HistoryItem {
        guard let deviceTime = deviceTime else {
            return nil
        }
-        return responseDate?.timeIntervalSince(deviceTime)
+        return responseDate.timeIntervalSince(deviceTime)
    }

    var clockOffset: Int? {
-        guard let interval = roundTripTime, let deviceTime = deviceTime else {
+        guard let deviceTime = deviceTime else {
            return nil
        }
-        let estimatedArrival = requestDate.advanced(by: interval / 2)
+        let estimatedArrival = requestDate.advanced(by: roundTripTime / 2)
        return Int(deviceTime.timeIntervalSince(estimatedArrival))
    }

@ -125,7 +103,12 @@ extension HistoryItem {
    static var mock: HistoryItem {
        let content = Message.Content(time: Date.now.timestamp, id: 123, device: 0)
        let content2 = Message.Content(time: (Date.now + 1).timestamp, id: 124, device: 0)
-        return .init(sent: content, date: .now, local: false)
-            .didReceive(response: .openSesame, date: .now + 2, message: content2)
+        return .init(
+            sent: content,
+            sentDate: .now,
+            local: false,
+            response: .openSesame,
+            responseDate: .now + 2,
+            responseMessage: content2)
    }
 }
--- a/Sesame/History/HistoryListItem.swift
+++ b/Sesame/History/HistoryListItem.swift
@ -16,11 +16,8 @@ struct HistoryListItem: View {
        df.string(from: entry.requestDate)
    }

-    var roundTripText: String? {
-        guard let time = entry.roundTripTime else {
-            return nil
-        }
-        return "\(Int(time * 1000)) ms"
+    var roundTripText: String {
+        "\(Int(entry.roundTripTime * 1000)) ms"
    }

    var counterText: String {
@ -46,17 +43,15 @@ struct HistoryListItem: View {
    var body: some View {
        VStack(alignment: .leading) {
            HStack {
-                Text(entry.response?.description ?? "")
+                Text(entry.response.description)
                    .font(.headline)
                Spacer()
                Text(entryTime)
            }.padding(.bottom, 1)
            HStack {
-                if let roundTripText {
                Image(systemSymbol: entry.usedLocalConnection ? .wifi : .network)
                Text(roundTripText)
                    .font(.subheadline)
-                }
                Image(systemSymbol: .personalhotspot)
                Text(counterText)
                    .font(.subheadline)
--- a/Sesame/HistoryView.swift
+++ b/Sesame/HistoryView.swift
@ -2,20 +2,59 @@ import SwiftUI

 struct HistoryView: View {

-    let manager: HistoryManagerProtocol
+    let history: HistoryManagerProtocol
+
+    @State
+    private var items: [HistoryItem] = []
+
+    @State
+    private var unlockCount = 0
+
+    private var percentage: Double {
+        guard items.count > 0 else {
+            return 0
+        }
+        return Double(unlockCount * 100) / Double(items.count)
+    }

    var body: some View {
        NavigationView {
-            List(manager.loadEntries()) { entry in
+            List {
+                HStack {
+                    Text("\(items.count) requests")
+                        .foregroundColor(.primary)
+                        .font(.body)
+                    Spacer()
+                    Text(String(format: "%d successful (%.1f %%)", unlockCount, percentage))
+                        .foregroundColor(.secondary)
+                        .font(.footnote)
+                }
+                ForEach(items) {entry in
                    HistoryListItem(entry: entry)
                }
+            }
            .navigationTitle("History")
        }
+        .onAppear {
+            load()
+        }
+    }
+
+    private func load() {
+        Task {
+            let entries = history.loadEntries()
+            DispatchQueue.main.async {
+                items = entries
+                unlockCount = items.count {
+                    $0.response == .openSesame
+                }
+            }
+        }
    }
 }

 struct HistoryView_Previews: PreviewProvider {
    static var previews: some View {
-        HistoryView(manager: HistoryManagerMock())
+        HistoryView(history: HistoryManagerMock())
    }
 }
--- a/Assets.xcassets/Contents.json
+++ b/Assets.xcassets/Contents.json
@ -1,6 +0,0 @@
-{
-  "info" : {
-    "author" : "xcode",
-    "version" : 1
-  }
-}
--- a/Sesame/SettingsView.swift
+++ b/Sesame/SettingsView.swift
@ -2,8 +2,7 @@ import SwiftUI

 struct SettingsView: View {

-    @Binding
-    var keyManager: KeyManagement
+    let keyManager: KeyManagement
    
    @Binding
    var serverAddress: String
@ -88,7 +87,7 @@ struct SettingsView: View {
                    }.padding(.vertical, 8)
                    ForEach(KeyManagement.KeyType.allCases) { keyType in
                        SingleKeyView(
-                            keyManager: $keyManager,
+                            keyManager: keyManager,
                            type: keyType)
                    }
                    Toggle(isOn: $isCompensatingDaylightTime) {
@ -157,7 +156,7 @@ struct SettingsView: View {
 struct SettingsView_Previews: PreviewProvider {
    static var previews: some View {
        SettingsView(
-            keyManager: .constant(KeyManagement()),
+            keyManager: KeyManagement(),
            serverAddress: .constant("https://example.com"),
            localAddress: .constant("192.168.178.42"),
            deviceID: .constant(0),
--- a/Sesame/SingleKeyView.swift
+++ b/Sesame/SingleKeyView.swift
@ -6,8 +6,7 @@ struct SingleKeyView: View {
    @State
    private var needRefresh = false

-    @Binding
-    var keyManager: KeyManagement
+    let keyManager: KeyManagement
    
    @State
    private var showEditWindow = false
@ -74,7 +73,7 @@ struct SingleKeyView: View {
            TextField("Key data", text: $keyText)
                .lineLimit(4)
                .font(.system(.body, design: .monospaced))
-                .foregroundColor(.black)
+                .foregroundColor(.primary)
            Button("Save", action: saveKey)
            Button("Cancel", role: .cancel, action: {})
        }, message: {
@ -101,7 +100,7 @@ struct SingleKeyView: View {
 struct SingleKeyView_Previews: PreviewProvider {
    static var previews: some View {
        SingleKeyView(
-            keyManager: .constant(KeyManagement()),
+            keyManager: KeyManagement(),
            type: .deviceKey)
        .previewLayout(.fixed(width: 350, height: 100))
    }