Drag drop finally works

WIP item background
New Donate page stub
Renamed some classes as services

ModernKeePass/Services/DatabaseService.cs

@@ -0,0 +1,225 @@
+using System;
+using Windows.Storage;
+using Windows.UI.Xaml.Controls;
+using ModernKeePass.Exceptions;
+using ModernKeePass.Interfaces;
+using ModernKeePass.ViewModels;
+using ModernKeePassLib;
+using ModernKeePassLib.Collections;
+using ModernKeePassLib.Cryptography.KeyDerivation;
+using ModernKeePassLib.Interfaces;
+using ModernKeePassLib.Keys;
+using ModernKeePassLib.Security;
+using ModernKeePassLib.Serialization;
+
+namespace ModernKeePass.Services
+{
+    public class DatabaseService: IDatabase
+    {
+        public enum DatabaseStatus
+        {
+            Error = -3,
+            NoCompositeKey = -2,
+            CompositeKeyError = -1,
+            Closed = 0,
+            Opening = 1,
+            Opened = 2
+        }
+        private readonly PwDatabase _pwDatabase = new PwDatabase();
+        private StorageFile _databaseFile;
+        private GroupVm _recycleBin;
+
+        public GroupVm RootGroup { get; set; }
+
+        public GroupVm RecycleBin
+        {
+            get { return _recycleBin; }
+            set
+            {
+                _recycleBin = value;
+                _pwDatabase.RecycleBinUuid = _recycleBin.IdUuid;
+            }
+        }
+        
+        public int Status { get; set; } = (int)DatabaseStatus.Closed;
+        public string Name => DatabaseFile?.Name;
+        
+        public bool RecycleBinEnabled
+        {
+            get { return _pwDatabase.RecycleBinEnabled; }
+            set { _pwDatabase.RecycleBinEnabled = value; }
+        }
+        
+        public StorageFile DatabaseFile
+        {
+            get { return _databaseFile; }
+            set
+            {
+                _databaseFile = value;
+                Status = (int)DatabaseStatus.Opening;
+            }
+        }
+
+        public PwUuid DataCipher
+        {
+            get { return _pwDatabase.DataCipherUuid; }
+            set { _pwDatabase.DataCipherUuid = value; }
+        }
+
+        public PwCompressionAlgorithm CompressionAlgorithm
+        {
+            get { return _pwDatabase.Compression; }
+            set { _pwDatabase.Compression = value; }
+        }
+
+        public KdfParameters KeyDerivation
+        {
+            get { return _pwDatabase.KdfParameters; }
+            set { _pwDatabase.KdfParameters = value; }
+        }
+        
+        /// <summary>
+        /// Open a KeePass database
+        /// </summary>
+        /// <param name="key">The database composite key</param>
+        /// <param name="createNew">True to create a new database before opening it</param>
+        /// <returns>An error message, if any</returns>
+        public void Open(CompositeKey key, bool createNew = false)
+        {
+            try
+            {
+                if (key == null)
+                {
+                    Status = (int)DatabaseStatus.NoCompositeKey;
+                    return;
+                }
+                var ioConnection = IOConnectionInfo.FromFile(DatabaseFile);
+                if (createNew)
+                {
+                    _pwDatabase.New(ioConnection, key);
+
+                    //Get settings default values
+                    if (SettingsService.GetSetting<bool>("Sample")) CreateSampleData();
+                    var fileFormat = SettingsService.GetSetting<string>("DefaultFileFormat");
+                    switch (fileFormat)
+                    {
+                        case "4":
+                            KeyDerivation = KdfPool.Get("Argon2").GetDefaultParameters();
+                            break;
+                    }
+                }
+                else _pwDatabase.Open(ioConnection, key, new NullStatusLogger());
+
+                if (!_pwDatabase.IsOpen) return;
+                Status = (int)DatabaseStatus.Opened;
+                RootGroup = new GroupVm(_pwDatabase.RootGroup, null, RecycleBinEnabled ? _pwDatabase.RecycleBinUuid : null);
+            }
+            catch (InvalidCompositeKeyException)
+            {
+                Status = (int)DatabaseStatus.CompositeKeyError;
+            }
+            catch (Exception)
+            {
+                Status = (int)DatabaseStatus.Error;
+                throw;
+            }
+        }
+
+        /// <summary>
+        /// Save the current database to another file and open it
+        /// </summary>
+        /// <param name="file">The new database file</param>
+        public void Save(StorageFile file)
+        {
+            var oldFile = DatabaseFile;
+            DatabaseFile = file;
+            try
+            {
+                _pwDatabase.SaveAs(IOConnectionInfo.FromFile(DatabaseFile), true, new NullStatusLogger());
+            }
+            catch
+            {
+                DatabaseFile = oldFile;
+                throw;
+            }
+            finally
+            {
+                Status = (int)DatabaseStatus.Opened;
+            }
+        }
+
+        /// <summary>
+        /// Commit the changes to the currently opened database to file
+        /// </summary>
+        public void Save()
+        {
+            if (_pwDatabase == null || !_pwDatabase.IsOpen) return;
+            try
+            {
+                _pwDatabase.Save(new NullStatusLogger());
+            }
+            catch (Exception e)
+            {
+                throw new SaveException(e);
+            }
+        }
+
+        /// <summary>
+        /// Close the currently opened database
+        /// </summary>
+        public void Close()
+        {
+            _pwDatabase?.Close();
+            Status = (int)DatabaseStatus.Closed;
+        }
+
+        public void AddDeletedItem(PwUuid id)
+        {
+            _pwDatabase.DeletedObjects.Add(new PwDeletedObject(id, DateTime.UtcNow));
+        }
+
+        public void CreateRecycleBin()
+        {
+            RecycleBin = RootGroup.AddNewGroup("Recycle bin");
+            RecycleBin.IsSelected = true;
+            RecycleBin.IconSymbol = Symbol.Delete;
+        }
+
+        public void UpdateCompositeKey(CompositeKey key)
+        {
+            _pwDatabase.MasterKey = key;
+        }
+
+        private void CreateSampleData()
+        {
+            _pwDatabase.RootGroup.AddGroup(new PwGroup(true, true, "Banking", PwIcon.Count), true);
+            _pwDatabase.RootGroup.AddGroup(new PwGroup(true, true, "Email", PwIcon.EMail), true);
+            _pwDatabase.RootGroup.AddGroup(new PwGroup(true, true, "Internet", PwIcon.World), true);
+
+            var pe = new PwEntry(true, true);
+            pe.Strings.Set(PwDefs.TitleField, new ProtectedString(_pwDatabase.MemoryProtection.ProtectTitle,
+                "Sample Entry"));
+            pe.Strings.Set(PwDefs.UserNameField, new ProtectedString(_pwDatabase.MemoryProtection.ProtectUserName,
+                "Username"));
+            pe.Strings.Set(PwDefs.UrlField, new ProtectedString(_pwDatabase.MemoryProtection.ProtectUrl,
+                PwDefs.HomepageUrl));
+            pe.Strings.Set(PwDefs.PasswordField, new ProtectedString(_pwDatabase.MemoryProtection.ProtectPassword,
+                "Password"));
+            pe.Strings.Set(PwDefs.NotesField, new ProtectedString(_pwDatabase.MemoryProtection.ProtectNotes,
+                "You may safely delete this sample"));
+            _pwDatabase.RootGroup.AddEntry(pe, true);
+
+            pe = new PwEntry(true, true);
+            pe.Strings.Set(PwDefs.TitleField, new ProtectedString(_pwDatabase.MemoryProtection.ProtectTitle,
+                "Sample Entry #2"));
+            pe.Strings.Set(PwDefs.UserNameField, new ProtectedString(_pwDatabase.MemoryProtection.ProtectUserName,
+                "Michael321"));
+            pe.Strings.Set(PwDefs.UrlField, new ProtectedString(_pwDatabase.MemoryProtection.ProtectUrl,
+                PwDefs.HelpUrl + "kb/testform.html"));
+            pe.Strings.Set(PwDefs.PasswordField, new ProtectedString(_pwDatabase.MemoryProtection.ProtectPassword,
+                "12345"));
+            pe.AutoType.Add(new AutoTypeAssociation("*Test Form - KeePass*", string.Empty));
+            _pwDatabase.RootGroup.AddEntry(pe, true);
+        }
+    }
+}

ModernKeePass/Services/MessageDialogService.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Collections.Generic;
+using Windows.Storage.Pickers;
+using Windows.UI.Popups;
+using ModernKeePass.Exceptions;
+using ModernKeePass.Interfaces;
+
+namespace ModernKeePass.Services
+{
+    public static class MessageDialogService
+    {
+        public static async void ShowActionDialog(string title, string contentText, string actionButtonText, string cancelButtonText, UICommandInvokedHandler action)
+        {
+            // Create the message dialog and set its content
+            var messageDialog = new MessageDialog(contentText, title);
+
+            // Add commands and set their callbacks; both buttons use the same callback function instead of inline event handlers
+            messageDialog.Commands.Add(new UICommand(actionButtonText, action));
+            messageDialog.Commands.Add(new UICommand(cancelButtonText));
+
+            // Set the command that will be invoked by default
+            messageDialog.DefaultCommandIndex = 1;
+
+            // Set the command to be invoked when escape is pressed
+            messageDialog.CancelCommandIndex = 1;
+
+            // Show the message dialog
+            await messageDialog.ShowAsync();
+        }
+
+        public static void SaveErrorDialog(SaveException exception, IDatabase database)
+        {
+            ShowActionDialog("Save error", exception.InnerException.Message, "Save as", "Discard", async command => 
+            {
+                var savePicker = new FileSavePicker
+                {
+                    SuggestedStartLocation = PickerLocationId.DocumentsLibrary,
+                    SuggestedFileName = $"{database.DatabaseFile.DisplayName} - copy"
+                };
+                savePicker.FileTypeChoices.Add("KeePass 2.x database", new List<string> { ".kdbx" });
+
+                var file = await savePicker.PickSaveFileAsync();
+                if (file != null) database.Save(file);
+            });
+        }
+
+        public static async void ShowErrorDialog(Exception exception)
+        {
+            if (exception == null) return;
+            // Create the message dialog and set its content
+            var messageDialog = new MessageDialog(exception.Message, "Error occured");
+
+            // Add commands and set their callbacks; both buttons use the same callback function instead of inline event handlers
+            messageDialog.Commands.Add(new UICommand("OK"));
+            
+            // Show the message dialog
+            await messageDialog.ShowAsync();
+        }
+    }
+}

ModernKeePass/Services/SettingsService.cs

@@ -0,0 +1,28 @@
+using System;
+using Windows.Storage;
+
+namespace ModernKeePass.Services
+{
+    public class SettingsService
+    {
+        public static T GetSetting<T>(string property)
+        {
+            try
+            {
+                return (T)Convert.ChangeType(ApplicationData.Current.LocalSettings.Values[property], typeof(T));
+            }
+            catch (InvalidCastException)
+            {
+                return default(T);
+            }
+        }
+
+        public static void PutSetting<T>(string property, T value)
+        {
+            var localSettings = ApplicationData.Current.LocalSettings;
+            if (localSettings.Values.ContainsKey(property))
+                localSettings.Values[property] = value;
+            else localSettings.Values.Add(property, value);
+        }
+    }
+}

ModernKeePass/Services/ToastNotificationService.cs

@@ -0,0 +1,49 @@
+using System;
+using Windows.Data.Json;
+using Windows.Data.Xml.Dom;
+using Windows.UI.Notifications;
+using ModernKeePass.Interfaces;
+using ModernKeePass.ViewModels;
+
+namespace ModernKeePass.Services
+{
+    public static class ToastNotificationService
+    {
+        public static void ShowMovedToast(IPwEntity entity, string action, string text)
+        {
+            var entityType = entity is GroupVm ? "Group" : "Entry";
+            var notificationXml = ToastNotificationManager.GetTemplateContent(ToastTemplateType.ToastText02);
+            var toastElements = notificationXml.GetElementsByTagName("text");
+            toastElements[0].AppendChild(notificationXml.CreateTextNode($"{action} {entityType} {entity.Name}"));
+            toastElements[1].AppendChild(notificationXml.CreateTextNode(text));
+            var toastNode = notificationXml.SelectSingleNode("/toast");
+
+            var launch = new JsonObject
+            {
+                {"entityType", JsonValue.CreateStringValue(entityType)},
+                {"entityId", JsonValue.CreateStringValue(entity.Id)}
+            };
+            ((XmlElement)toastNode)?.SetAttribute("launch", launch.Stringify());
+
+            var toast = new ToastNotification(notificationXml)
+            {
+                ExpirationTime = DateTime.Now.AddSeconds(5)
+            };
+            ToastNotificationManager.CreateToastNotifier().Show(toast);
+        }
+
+        public static void ShowGenericToast(string title, string text)
+        {
+            var notificationXml = ToastNotificationManager.GetTemplateContent(ToastTemplateType.ToastText02);
+            var toastElements = notificationXml.GetElementsByTagName("text");
+            toastElements[0].AppendChild(notificationXml.CreateTextNode(title));
+            toastElements[1].AppendChild(notificationXml.CreateTextNode(text));
+            
+            var toast = new ToastNotification(notificationXml)
+            {
+                ExpirationTime = DateTime.Now.AddSeconds(5)
+            };
+            ToastNotificationManager.CreateToastNotifier().Show(toast);
+        }
+    }
+}