[#575] Add support for sending feedback (#588)

Closes #575

- Added `SupportDataGenerator` object which generates data sent with
  support email. Format of the data is based on what Android has.
- Support button is moved to settings from profile.
- Support button opens mail composer.

secant.xcodeproj/project.pbxproj

@@ -320,6 +320,16 @@
 		3448CB3228E47666006ADEDB /* NotEnoughFreeSpaceView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3448CB3128E47666006ADEDB /* NotEnoughFreeSpaceView.swift */; };
 		3448CB3728E485CB006ADEDB /* NotEnoughFeeSpaceSnapshots.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3448CB3628E485CB006ADEDB /* NotEnoughFeeSpaceSnapshots.swift */; };
 		346715A528E2027D0035F7C4 /* CheckCircleStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = 346715A428E2027D0035F7C4 /* CheckCircleStore.swift */; };
+		3467319529AE265300974482 /* SupportDataGenerator.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3467319429AE265300974482 /* SupportDataGenerator.swift */; };
+		3467319629AE265300974482 /* SupportDataGenerator.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3467319429AE265300974482 /* SupportDataGenerator.swift */; };
+		3467319929AE374300974482 /* SupportDataGeneratorInterface.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3467319829AE374300974482 /* SupportDataGeneratorInterface.swift */; };
+		3467319A29AE374300974482 /* SupportDataGeneratorInterface.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3467319829AE374300974482 /* SupportDataGeneratorInterface.swift */; };
+		3467319C29AE374A00974482 /* SupportDataGeneratorLiveKey.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3467319B29AE374A00974482 /* SupportDataGeneratorLiveKey.swift */; };
+		3467319D29AE374A00974482 /* SupportDataGeneratorLiveKey.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3467319B29AE374A00974482 /* SupportDataGeneratorLiveKey.swift */; };
+		3467319F29AE375000974482 /* SupportDataGeneratorTestKey.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3467319E29AE375000974482 /* SupportDataGeneratorTestKey.swift */; };
+		346731A029AE375000974482 /* SupportDataGeneratorTestKey.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3467319E29AE375000974482 /* SupportDataGeneratorTestKey.swift */; };
+		346731A229AE3A5100974482 /* UIMailDialog.swift in Sources */ = {isa = PBXBuildFile; fileRef = 346731A129AE3A5100974482 /* UIMailDialog.swift */; };
+		346731A329AE3A5100974482 /* UIMailDialog.swift in Sources */ = {isa = PBXBuildFile; fileRef = 346731A129AE3A5100974482 /* UIMailDialog.swift */; };
 		3469F18229ACD70500A07146 /* OnboardingFlowFeatureFlagTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3469F18129ACD70500A07146 /* OnboardingFlowFeatureFlagTests.swift */; };
 		346D41E428DF0B8600963F36 /* CheckCircle.swift in Sources */ = {isa = PBXBuildFile; fileRef = 346D41E328DF0B8600963F36 /* CheckCircle.swift */; };
 		34BF09092927C98000222134 /* Memo+toString.swift in Sources */ = {isa = PBXBuildFile; fileRef = 34BF09082927C98000222134 /* Memo+toString.swift */; };
@@ -645,6 +655,11 @@
 		3448CB3128E47666006ADEDB /* NotEnoughFreeSpaceView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NotEnoughFreeSpaceView.swift; sourceTree = "<group>"; };
 		3448CB3628E485CB006ADEDB /* NotEnoughFeeSpaceSnapshots.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NotEnoughFeeSpaceSnapshots.swift; sourceTree = "<group>"; };
 		346715A428E2027D0035F7C4 /* CheckCircleStore.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CheckCircleStore.swift; sourceTree = "<group>"; };
+		3467319429AE265300974482 /* SupportDataGenerator.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SupportDataGenerator.swift; sourceTree = "<group>"; };
+		3467319829AE374300974482 /* SupportDataGeneratorInterface.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SupportDataGeneratorInterface.swift; sourceTree = "<group>"; };
+		3467319B29AE374A00974482 /* SupportDataGeneratorLiveKey.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SupportDataGeneratorLiveKey.swift; sourceTree = "<group>"; };
+		3467319E29AE375000974482 /* SupportDataGeneratorTestKey.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SupportDataGeneratorTestKey.swift; sourceTree = "<group>"; };
+		346731A129AE3A5100974482 /* UIMailDialog.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UIMailDialog.swift; sourceTree = "<group>"; };
 		3469F18129ACD70500A07146 /* OnboardingFlowFeatureFlagTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = OnboardingFlowFeatureFlagTests.swift; sourceTree = "<group>"; };
 		346D41E328DF0B8600963F36 /* CheckCircle.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CheckCircle.swift; sourceTree = "<group>"; };
 		34BF09082927C98000222134 /* Memo+toString.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Memo+toString.swift"; sourceTree = "<group>"; };
@@ -1173,6 +1188,17 @@
 			path = SendSnapshotTests;
 			sourceTree = "<group>";
 		};
+		3467319729AE36F000974482 /* SupportDataGenerator */ = {
+			isa = PBXGroup;
+			children = (
+				3467319429AE265300974482 /* SupportDataGenerator.swift */,
+				3467319829AE374300974482 /* SupportDataGeneratorInterface.swift */,
+				3467319B29AE374A00974482 /* SupportDataGeneratorLiveKey.swift */,
+				3467319E29AE375000974482 /* SupportDataGeneratorTestKey.swift */,
+			);
+			path = SupportDataGenerator;
+			sourceTree = "<group>";
+		};
 		346D41E228DF0B0900963F36 /* CheckCircle */ = {
 			isa = PBXGroup;
 			children = (
@@ -1464,6 +1490,7 @@
 		9E612C6D2987A96500D09B09 /* UIKitBridge */ = {
 			isa = PBXGroup;
 			children = (
+				346731A129AE3A5100974482 /* UIMailDialog.swift */,
 				9E612C6E2987A9B100D09B09 /* UIShareDialog.swift */,
 			);
 			path = UIKitBridge;
@@ -1649,6 +1676,7 @@
 				9EB863A329239D95003D0F8B /* RecoveryPhraseRandomizer */,
 				9EB863B62923C539003D0F8B /* SDKSynchronizer */,
 				9EB863B32923C465003D0F8B /* SecItem */,
+				3467319729AE36F000974482 /* SupportDataGenerator */,
 				9EB8639E29239891003D0F8B /* URIParser */,
 				9E153A7129216EBD00112F41 /* UserDefaults */,
 				9EB863B72923C55A003D0F8B /* UserPreferencesStorage */,
@@ -2557,6 +2585,7 @@
 				0D26AEA5299E8196005260EE /* TransactionSendingView.swift in Sources */,
 				0D26AEA6299E8196005260EE /* WalletEventsFlowView.swift in Sources */,
 				0D26AEA7299E8196005260EE /* CaptureDeviceLiveKey.swift in Sources */,
+				3467319A29AE374300974482 /* SupportDataGeneratorInterface.swift in Sources */,
 				0D26AEA8299E8196005260EE /* AudioServicesInterface.swift in Sources */,
 				0D26AEA9299E8196005260EE /* NotificationCenterTest.swift in Sources */,
 				0D26AEAA299E8196005260EE /* CrashReporterLiveKey.swift in Sources */,
@@ -2605,15 +2634,18 @@
 				0D26AED3299E8196005260EE /* SyncStatusSnapshot.swift in Sources */,
 				0D26AED4299E8196005260EE /* SecantButtonStyles.swift in Sources */,
 				0D26AED5299E8196005260EE /* RecoveryPhraseBackupFailedView.swift in Sources */,
+				346731A029AE375000974482 /* SupportDataGeneratorTestKey.swift in Sources */,
 				0D26AED6299E8196005260EE /* UserPreferencesStorageInterface.swift in Sources */,
 				0D26AED7299E8196005260EE /* DiskSpaceCheckerMocks.swift in Sources */,
 				0D26AED8299E8196005260EE /* DropDelegate.swift in Sources */,
 				0D26AED9299E8196005260EE /* LocalAuthenticationLiveKey.swift in Sources */,
 				0D26AEDA299E8196005260EE /* ImportSeedEditor.swift in Sources */,
 				0D26AEDB299E8196005260EE /* ProfileStore.swift in Sources */,
+				3467319629AE265300974482 /* SupportDataGenerator.swift in Sources */,
 				0D26AEDC299E8196005260EE /* CheckCircle.swift in Sources */,
 				0D26AEDD299E8196005260EE /* LogStore.swift in Sources */,
 				0D26AEDE299E8196005260EE /* RecoveryPhraseRandomizer.swift in Sources */,
+				3467319D29AE374A00974482 /* SupportDataGeneratorLiveKey.swift in Sources */,
 				0D26AEDF299E8196005260EE /* FileManagerTestKey.swift in Sources */,
 				0D26AEE0299E8196005260EE /* SecItemLive.swift in Sources */,
 				0D26AEE1299E8196005260EE /* CircularFrameBadge.swift in Sources */,
@@ -2733,6 +2765,7 @@
 				0D26AF52299E8196005260EE /* LogsHandlerTest.swift in Sources */,
 				0D26AF53299E8196005260EE /* TextFieldFooter.swift in Sources */,
 				0D26AF54299E8196005260EE /* CrashReportingInterface.swift in Sources */,
+				346731A329AE3A5100974482 /* UIMailDialog.swift in Sources */,
 				0D26AF55299E8196005260EE /* ProfileView.swift in Sources */,
 				0D26AF56299E8196005260EE /* ScanStore.swift in Sources */,
 				0D26AF57299E8196005260EE /* NumberFormatterTestKey.swift in Sources */,
@@ -2781,6 +2814,7 @@
 				34DA414728E4385800F8CC61 /* TransactionSendingView.swift in Sources */,
 				F96B41E9273B501F0021B49A /* WalletEventsFlowView.swift in Sources */,
 				9EBDF96E291ECED4000A1A05 /* CaptureDeviceLiveKey.swift in Sources */,
+				3467319929AE374300974482 /* SupportDataGeneratorInterface.swift in Sources */,
 				9EBDF968291ECDA2000A1A05 /* AudioServicesInterface.swift in Sources */,
 				9EB863BD2923C704003D0F8B /* NotificationCenterTest.swift in Sources */,
 				0D26103E298C3FA600CC9DE9 /* CrashReporterLiveKey.swift in Sources */,
@@ -2829,15 +2863,18 @@
 				9E66122C2877188700C75B70 /* SyncStatusSnapshot.swift in Sources */,
 				9E4DC6E227C4C6B700E657F4 /* SecantButtonStyles.swift in Sources */,
 				0DDB6A5127737D4A0012A410 /* RecoveryPhraseBackupFailedView.swift in Sources */,
+				3467319F29AE375000974482 /* SupportDataGeneratorTestKey.swift in Sources */,
 				0D63170029919970007D873F /* UserPreferencesStorageInterface.swift in Sources */,
 				9EBDF94D291D773A000A1A05 /* DiskSpaceCheckerMocks.swift in Sources */,
 				0D6D628B276A528E002FB4CC /* DropDelegate.swift in Sources */,
 				9EBDF986291F91EF000A1A05 /* LocalAuthenticationLiveKey.swift in Sources */,
 				9E2DF99D27CF704D00649636 /* ImportSeedEditor.swift in Sources */,
 				F9971A5327680DD000A2DB75 /* ProfileStore.swift in Sources */,
+				3467319529AE265300974482 /* SupportDataGenerator.swift in Sources */,
 				346D41E428DF0B8600963F36 /* CheckCircle.swift in Sources */,
 				9E0F5745297EBA1B005304FA /* LogStore.swift in Sources */,
 				9EB863AA29239EB2003D0F8B /* RecoveryPhraseRandomizer.swift in Sources */,
+				3467319C29AE374A00974482 /* SupportDataGeneratorLiveKey.swift in Sources */,
 				9EB863C52923C8AF003D0F8B /* FileManagerTestKey.swift in Sources */,
 				9EB863BF2923C72C003D0F8B /* SecItemLive.swift in Sources */,
 				669FDAEB272C23C2007B9422 /* CircularFrameBadge.swift in Sources */,
@@ -2957,6 +2994,7 @@
 				9E612C7629880FC900D09B09 /* LogsHandlerTest.swift in Sources */,
 				2EDA07A227EDE1AE00D6F09B /* TextFieldFooter.swift in Sources */,
 				0D26103C298C3E4800CC9DE9 /* CrashReportingInterface.swift in Sources */,
+				346731A229AE3A5100974482 /* UIMailDialog.swift in Sources */,
 				F9971A5427680DD000A2DB75 /* ProfileView.swift in Sources */,
 				F9971A6027680DF600A2DB75 /* ScanStore.swift in Sources */,
 				9EB863952922D036003D0F8B /* NumberFormatterTestKey.swift in Sources */,

secant/Dependencies/SupportDataGenerator/SupportDataGenerator.swift

@@ -0,0 +1,186 @@
+//
+//  SupportDataGenerator.swift
+//  secant
+//
+//  Created by Michal Fousek on 28.02.2023.
+//
+
+import AVFoundation
+import Foundation
+import LocalAuthentication
+import UIKit
+
+struct SupportData: Equatable {
+    let toAddress: String
+    let subject: String
+    let message: String
+}
+
+enum SupportDataGenerator {
+    static func generate() -> SupportData {
+        let items: [SupportDataGeneratorItem] = [
+            TimeItem(),
+            AppVersionItem(),
+            SystemVersionItem(),
+            DeviceModelItem(),
+            LocaleItem(),
+            FreeDiskSpaceItem(),
+            PermissionsItems()
+        ]
+
+        let message = items
+            .map { $0.generate() }
+            .flatMap { $0 }
+            .map { "\($0.0): \($0.1)" }
+            .joined(separator: "\n")
+
+        return SupportData(toAddress: "support@electriccoin.co", subject: "sECCant", message: message)
+    }
+}
+
+private protocol SupportDataGeneratorItem {
+    func generate() -> [(String, String)]
+}
+
+private struct TimeItem: SupportDataGeneratorItem {
+    private enum Constants {
+        static let timeKey = "Current time"
+    }
+
+    let dateFormatter: DateFormatter
+
+    init() {
+        dateFormatter = DateFormatter()
+        dateFormatter.dateFormat = "yyyy-MM-dd hh:mm:ss a ZZZZ"
+        dateFormatter.locale = Locale(identifier: "en_US")
+    }
+
+    func generate() -> [(String, String)] {
+        return [(Constants.timeKey, dateFormatter.string(from: Date()))]
+    }
+}
+
+private struct AppVersionItem: SupportDataGeneratorItem {
+    private enum Constants {
+        static let bundleIdentifierKey = "App identifier"
+        static let versionKey = "App version"
+        static let unknownVersion = "Unknown"
+    }
+
+    func generate() -> [(String, String)] {
+        let bundle = Bundle.main
+        guard let infoDict = bundle.infoDictionary else { return [(Constants.versionKey, Constants.unknownVersion)] }
+
+        var data: [(String, String)] = []
+        if let bundleIdentifier = bundle.bundleIdentifier {
+            data.append((Constants.bundleIdentifierKey, bundleIdentifier))
+        }
+
+        if let build = infoDict["CFBundleVersion"] as? String, let version = infoDict["CFBundleShortVersionString"] as? String {
+            data.append((Constants.versionKey, "\(version) (\(build))"))
+        } else {
+            data.append((Constants.versionKey, Constants.unknownVersion))
+        }
+
+        return data
+    }
+}
+
+private struct SystemVersionItem: SupportDataGeneratorItem {
+    private enum Constants {
+        static let systemVersionKey = "iOS version"
+    }
+
+    func generate() -> [(String, String)] {
+        return [(Constants.systemVersionKey, UIDevice.current.systemVersion)]
+    }
+}
+
+private struct DeviceModelItem: SupportDataGeneratorItem {
+    private enum Constants {
+        static let deviceModelKey = "Device"
+        static let unknownDevice = "unknown"
+    }
+
+    func generate() -> [(String, String)] {
+        var systemInfo = utsname()
+        uname(&systemInfo)
+        var readModel: String?
+        withUnsafePointer(to: &systemInfo.machine.0) { charPointer in
+            readModel = String(cString: charPointer, encoding: .ascii)
+        }
+
+        let model = readModel ?? Constants.unknownDevice
+        return [(Constants.deviceModelKey, model)]
+    }
+}
+
+private struct LocaleItem: SupportDataGeneratorItem {
+    private enum Constants {
+        static let localKey = "Locale"
+        static let groupingSeparatorKey = "Currency grouping separato"
+        static let decimalSeparatorKey = "Currency decimal separator"
+        static let unknownSeparator = "unknown"
+    }
+
+    func generate() -> [(String, String)] {
+        let locale = Locale.current
+
+        return [
+            (Constants.localKey, locale.identifier),
+            (Constants.groupingSeparatorKey, locale.groupingSeparator ?? Constants.unknownSeparator),
+            (Constants.decimalSeparatorKey, locale.decimalSeparator ?? Constants.unknownSeparator)
+        ]
+    }
+}
+
+private struct FreeDiskSpaceItem: SupportDataGeneratorItem {
+    private enum Constants {
+        static let freeDiskSpaceKey = "Usable storage"
+        static let freeDiskSpaceUnknown = "unknown"
+    }
+
+    func generate() -> [(String, String)] {
+        let freeDiskSpace: String
+
+        let fileURL = URL(fileURLWithPath: NSHomeDirectory())
+        do {
+            let values = try fileURL.resourceValues(forKeys: [.volumeAvailableCapacityForImportantUsageKey])
+            if let freeSpace = values.volumeAvailableCapacityForImportantUsage {
+                freeDiskSpace = "\(freeSpace / 1024 / 1024) MB"
+            } else {
+                freeDiskSpace = Constants.freeDiskSpaceUnknown
+            }
+        } catch {
+            LoggerProxy.debug("Can't get free disk space: \(error)")
+            freeDiskSpace = Constants.freeDiskSpaceUnknown
+        }
+
+        return [(Constants.freeDiskSpaceKey, freeDiskSpace)]
+    }
+}
+
+private struct PermissionsItems: SupportDataGeneratorItem {
+    private enum Constants {
+        static let permissionsKey = "Permissions"
+        static let cameraPermKey = "Camera access"
+        static let faceIDAvailable = "FaceID available"
+        static let touchIDAvailable = "TouchID available"
+        static let yesText = "yes"
+        static let noText = "no"
+    }
+
+    func generate() -> [(String, String)] {
+        let cameraAuthorized = AVCaptureDevice.authorizationStatus(for: .video) == .authorized
+
+        let bioAuthContext = LAContext()
+        let biometricAuthAvailable = bioAuthContext.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: nil)
+
+        return [
+            (Constants.permissionsKey, ""),
+            (Constants.cameraPermKey, cameraAuthorized ? Constants.yesText : Constants.noText),
+            (Constants.faceIDAvailable, biometricAuthAvailable && bioAuthContext.biometryType == .faceID ? Constants.yesText : Constants.noText),
+            (Constants.touchIDAvailable, biometricAuthAvailable && bioAuthContext.biometryType == .touchID ? Constants.yesText : Constants.noText)
+        ]
+    }
+}

secant/Dependencies/SupportDataGenerator/SupportDataGeneratorInterface.swift

@@ -0,0 +1,19 @@
+//
+//  SupportDataGeneratorInterface.swift
+//  secant
+//
+//  Created by Michal Fousek on 28.02.2023.
+//
+
+import ComposableArchitecture
+
+extension DependencyValues {
+    var supportDataGenerator: SupportDataGeneratorClient {
+        get { self[SupportDataGeneratorClient.self] }
+        set { self[SupportDataGeneratorClient.self] = newValue }
+    }
+}
+
+struct SupportDataGeneratorClient {
+    let generate: () -> SupportData
+}

secant/Dependencies/SupportDataGenerator/SupportDataGeneratorLiveKey.swift

@@ -0,0 +1,14 @@
+//
+//  SupportDataGeneratorLiveKey.swift
+//  secant
+//
+//  Created by Michal Fousek on 28.02.2023.
+//
+
+import ComposableArchitecture
+
+extension SupportDataGeneratorClient: DependencyKey {
+    static let liveValue = Self(
+        generate: { SupportDataGenerator.generate() }
+    )
+}

secant/Dependencies/SupportDataGenerator/SupportDataGeneratorTestKey.swift

@@ -0,0 +1,21 @@
+//
+//  SupportDataGeneratorTestKey.swift
+//  secant
+//
+//  Created by Michal Fousek on 28.02.2023.
+//
+
+import ComposableArchitecture
+import XCTestDynamicOverlay
+
+extension SupportDataGeneratorClient: TestDependencyKey {
+    static let testValue = Self(
+        generate: XCTUnimplemented("\(Self.self).generate")
+    )
+}
+
+extension SupportDataGeneratorClient {
+    static let noOp = Self(
+        generate: { SupportData(toAddress: "", subject: "", message: "") }
+    )
+}

secant/Features/Profile/ProfileView.swift

@@ -37,14 +37,6 @@ struct ProfileView: View {
                 .frame(height: 50)
                 .padding(EdgeInsets(top: 30, leading: 30, bottom: 20, trailing: 30))
 
-                Button(
-                    action: { },
-                    label: { Text("Support") }
-                )
-                .primaryButtonStyle
-                .frame(height: 50)
-                .padding(EdgeInsets(top: 0, leading: 30, bottom: 20, trailing: 30))
-
                 Spacer()
                 
                 HStack {

secant/Features/Settings/SettingsStore.swift

@@ -1,4 +1,5 @@
 import ComposableArchitecture
+import MessageUI
 import SwiftUI
 
 typealias SettingsStore = Store<SettingsReducer.State, SettingsReducer.Action>
@@ -10,13 +11,14 @@ struct SettingsReducer: ReducerProtocol {
             case backupPhrase
         }
 
+        @BindingState var alert: AlertState<SettingsReducer.Action>?
         var destination: Destination?
         var exportLogsDisabled = false
+        @BindingState var isCrashReportingOn: Bool
         var isSharingLogs = false
         var phraseDisplayState: RecoveryPhraseDisplayReducer.State
         var rescanDialog: ConfirmationDialogState<SettingsReducer.Action>?
-
+        var supportData: SupportData?
-        @BindingState var isCrashReportingOn: Bool
 
         var tempSDKDir: URL {
             let tempDir = FileManager.default.temporaryDirectory
@@ -42,6 +44,7 @@ struct SettingsReducer: ReducerProtocol {
         case backupWalletAccessRequest
         case binding(BindingAction<SettingsReducer.State>)
         case cancelRescan
+        case dismissAlert
         case exportLogs
         case fullRescan
         case logsExported
@@ -50,8 +53,10 @@ struct SettingsReducer: ReducerProtocol {
         case phraseDisplay(RecoveryPhraseDisplayReducer.Action)
         case quickRescan
         case rescanBlockchain
-        case updateDestination(SettingsReducer.State.Destination?)
+        case sendSupportMail
+        case sendSupportMailFinished
         case testCrashReporter // this will crash the app if live.
+        case updateDestination(SettingsReducer.State.Destination?)
     }
 
     @Dependency(\.localAuthentication) var localAuthentication
@@ -101,6 +106,10 @@ struct SettingsReducer: ReducerProtocol {
             case .cancelRescan, .quickRescan, .fullRescan:
                 state.rescanDialog = nil
                 return .none
+
+            case .dismissAlert:
+                state.alert = nil
+                return .none
                 
             case .exportLogs:
                 state.exportLogsDisabled = true
@@ -148,6 +157,26 @@ struct SettingsReducer: ReducerProtocol {
 
             case .binding:
                 return .none
+
+            case .sendSupportMail:
+                if MFMailComposeViewController.canSendMail() {
+                    state.supportData = SupportDataGenerator.generate()
+                } else {
+                    state.alert = AlertState(
+                        title: TextState("Can't send email"),
+                        message: TextState("""
+                        It looks like that you don't have any email account configured on your device. Therefore it's not possible to send a support \
+                        email.
+                        """),
+                        dismissButton: .default(TextState("Ok"), action: .send(.sendSupportMailFinished))
+                    )
+                }
+
+                return .none
+
+            case .sendSupportMailFinished:
+                state.supportData = nil
+                return .none
             }
         }
 
@@ -190,10 +219,10 @@ extension SettingsStore {
 
 extension SettingsReducer.State {
     static let placeholder = SettingsReducer.State(
+        isCrashReportingOn: true,
         phraseDisplayState: RecoveryPhraseDisplayReducer.State(
             phrase: .placeholder
-        ),
+        )
-        isCrashReportingOn: true
     )
 }
 

secant/Features/Settings/SettingsView.swift

@@ -48,6 +48,14 @@ struct SettingsView: View {
                 )
                 .primaryButtonStyle
                 .frame(height: 50)
+
+                Button(
+                    action: { viewStore.send(.sendSupportMail) },
+                    label: { Text("Send us feedback!") }
+                )
+                .primaryButtonStyle
+                .frame(height: 50)
+
                 Spacer()
             }
             .padding(.horizontal, 30)
@@ -64,6 +72,7 @@ struct SettingsView: View {
                 }
             )
             .onAppear { viewStore.send(.onAppear) }
+            .alert(self.store.scope(state: \.alert), dismiss: .dismissAlert)
             
             if viewStore.isSharingLogs {
                 UIShareDialogView(
@@ -75,6 +84,18 @@ struct SettingsView: View {
                 // so frame is set to 0 to not break SwiftUIs layout
                 .frame(width: 0, height: 0)
             }
+
+            if let supportData = viewStore.supportData {
+                UIMailDialogView(
+                    supportData: supportData,
+                    completion: {
+                        viewStore.send(.sendSupportMailFinished)
+                    }
+                )
+                // UIMailDialogView only wraps MFMailComposeViewController presentation
+                // so frame is set to 0 to not break SwiftUIs layout
+                .frame(width: 0, height: 0)
+            }
         }
     }
 }

secant/Features/Settings/UIKitBridge/UIMailDialog.swift

@@ -0,0 +1,73 @@
+//
+//  UIMailDialog.swift
+//  secant
+//
+//  Created by Michal Fousek on 28.02.2023.
+//
+
+import Foundation
+import MessageUI
+import UIKit
+import SwiftUI
+
+class UIMailDialog: UIView {
+    var completion: (() -> Void)?
+
+    required init?(coder aDecoder: NSCoder) {
+        super.init(coder: aDecoder)
+    }
+
+    override init(frame: CGRect) {
+        super.init(frame: frame)
+    }
+}
+
+extension UIMailDialog {
+    func doInitialSetup(supportData: SupportData, completion: @escaping () -> Void) {
+        self.completion = completion
+        DispatchQueue.main.async {
+            let mailVC = MFMailComposeViewController()
+            mailVC.mailComposeDelegate = self
+
+            // Configure the fields of the interface.
+            mailVC.setToRecipients([supportData.toAddress])
+            mailVC.setSubject(supportData.subject)
+            mailVC.setMessageBody("\n\n\(supportData.message)", isHTML: false)
+
+            let rootVC = UIApplication.shared.connectedScenes
+                .map { $0 as? UIWindowScene }
+                .compactMap { $0 }
+                .first?.windows.first?.rootViewController
+
+            rootVC?.present(
+                mailVC,
+                animated: true,
+                completion: nil
+            )
+        }
+    }
+}
+
+extension UIMailDialog: MFMailComposeViewControllerDelegate {
+    func mailComposeController(_ controller: MFMailComposeViewController, didFinishWith result: MFMailComposeResult, error: Error?) {
+        controller.dismiss(animated: true, completion: completion)
+    }
+}
+
+struct UIMailDialogView: UIViewRepresentable {
+    let supportData: SupportData
+    let completion: () -> Void
+
+    func makeUIView(context: UIViewRepresentableContext<UIMailDialogView>) -> UIMailDialog {
+        let view = UIMailDialog()
+        view.doInitialSetup(supportData: supportData, completion: completion)
+        return view
+    }
+
+    func updateUIView(_ uiView: UIMailDialog, context: UIViewRepresentableContext<UIMailDialogView>) {
+        // We can leave it empty here because the view is just handler how to bridge UIKit's UIActivityViewController
+        // presentation into SwiftUI. The view itself is not visible, only instantiated, therefore no updates needed.
+    }
+
+    typealias UIViewType = UIMailDialog
+}

secantTests/SettingsTests/SettingsTests.swift

@@ -46,8 +46,8 @@ class SettingsTests: XCTestCase {
         
         let store = TestStore(
             initialState: SettingsReducer.State(
-                phraseDisplayState: RecoveryPhraseDisplayReducer.State(phrase: nil),
+                isCrashReportingOn: false,
-                isCrashReportingOn: false
+                phraseDisplayState: RecoveryPhraseDisplayReducer.State(phrase: nil)
             ),
             reducer: SettingsReducer()
         ) { dependencies in
@@ -103,6 +103,7 @@ class SettingsTests: XCTestCase {
         let store = TestStore(
             initialState: SettingsReducer.State(
                 destination: nil,
+                isCrashReportingOn: false,
                 phraseDisplayState: .init(),
                 rescanDialog: .init(
                     title: TextState("Rescan"),
@@ -112,8 +113,7 @@ class SettingsTests: XCTestCase {
                         .default(TextState("Full rescan"), action: .send(.fullRescan)),
                         .cancel(TextState("Cancel"))
                     ]
-                ),
+                )
-                isCrashReportingOn: false
             ),
             reducer: SettingsReducer()
         )
@@ -127,6 +127,7 @@ class SettingsTests: XCTestCase {
         let store = TestStore(
             initialState: SettingsReducer.State(
                 destination: nil,
+                isCrashReportingOn: false,
                 phraseDisplayState: .init(),
                 rescanDialog: .init(
                     title: TextState("Rescan"),
@@ -136,8 +137,7 @@ class SettingsTests: XCTestCase {
                         .default(TextState("Full rescan"), action: .send(.fullRescan)),
                         .cancel(TextState("Cancel"))
                     ]
-                ),
+                )
-                isCrashReportingOn: false
             ),
             reducer: SettingsReducer()
         )
@@ -151,6 +151,7 @@ class SettingsTests: XCTestCase {
         let store = TestStore(
             initialState: SettingsReducer.State(
                 destination: nil,
+                isCrashReportingOn: false,
                 phraseDisplayState: .init(),
                 rescanDialog: .init(
                     title: TextState("Rescan"),
@@ -160,8 +161,7 @@ class SettingsTests: XCTestCase {
                         .default(TextState("Full rescan"), action: .send(.fullRescan)),
                         .cancel(TextState("Cancel"))
                     ]
-                ),
+                )
-                isCrashReportingOn: false
             ),
             reducer: SettingsReducer()
         )
@@ -175,6 +175,7 @@ class SettingsTests: XCTestCase {
         let store = TestStore(
             initialState: SettingsReducer.State(
                 destination: nil,
+                isCrashReportingOn: false,
                 phraseDisplayState: .init(),
                 rescanDialog: .init(
                     title: TextState("Rescan"),
@@ -184,8 +185,7 @@ class SettingsTests: XCTestCase {
                         .default(TextState("Full rescan"), action: .send(.fullRescan)),
                         .cancel(TextState("Cancel"))
                     ]
-                ),
+                )
-                isCrashReportingOn: false
             ),
             reducer: SettingsReducer()
         )
@@ -206,6 +206,7 @@ class SettingsTests: XCTestCase {
         let store = TestStore(
             initialState: SettingsReducer.State(
                 destination: nil,
+                isCrashReportingOn: false,
                 isSharingLogs: true,
                 phraseDisplayState: .init(),
                 rescanDialog: .init(
@@ -216,8 +217,7 @@ class SettingsTests: XCTestCase {
                         .default(TextState("Full rescan"), action: .send(.fullRescan)),
                         .cancel(TextState("Cancel"))
                     ]
-                ),
+                )
-                isCrashReportingOn: false
             ),
             reducer: SettingsReducer()
         )