Toast notifications and undo mechanism now works! (for group and entries)

ModernKeePass/Common/ToastNotificationHelper.cs

@@ -0,0 +1,97 @@
+using System;
+using Windows.Data.Xml.Dom;
+using Windows.UI.Notifications;
+using Windows.UI.Xaml;
+using Microsoft.QueryStringDotNET;
+using ModernKeePass.Interfaces;
+
+namespace ModernKeePass.Common
+{
+    public static class ToastNotificationHelper
+    {
+        public static /*async*/ void ShowUndoToast(string entityType, IPwEntity entity)
+        {
+            // This is for Windows 10
+            // Construct the visuals of the toast
+            /*var visual = new ToastVisual
+            {
+                BindingGeneric = new ToastBindingGeneric
+                {
+                    Children =
+                    {
+                        new AdaptiveText
+                        {
+                            Text = $"{entityType} {entity.Name} deleted."
+                        }
+                    }
+                }
+            };
+            
+            // Construct the actions for the toast (inputs and buttons)
+            var actions = new ToastActionsCustom
+            {
+                Buttons =
+                {
+                    new ToastButton("Undo", new QueryString
+                    {
+                        { "action", "undo" },
+                        { "entityType", entityType },
+                        { "entityId", entity.Id }
+
+                    }.ToString())
+                }
+            };
+
+            // Now we can construct the final toast content
+            var toastContent = new ToastContent
+            {
+                Visual = visual,
+                Actions = actions,
+                // Arguments when the user taps body of toast
+                Launch = new QueryString()
+                {
+                    { "action", "undo" },
+                    { "entityType", "group" },
+                    { "entityId", entity.Id }
+
+                }.ToString()
+            };
+
+            // And create the toast notification
+            var toastXml = new XmlDocument();
+            toastXml.LoadXml(toastContent.GetContent());
+            
+            var toast = new ToastNotification(toastXml) {ExpirationTime = DateTime.Now.AddSeconds(5)};
+            toast.Dismissed += Toast_Dismissed;
+            */
+            var notificationXml = ToastNotificationManager.GetTemplateContent(ToastTemplateType.ToastText02);
+            var toastElements = notificationXml.GetElementsByTagName("text");
+            toastElements[0].AppendChild(notificationXml.CreateTextNode($"{entityType} deleted"));
+            toastElements[1].AppendChild(notificationXml.CreateTextNode("Click me to undo"));
+            var toastNode = notificationXml.SelectSingleNode("/toast");
+            ((XmlElement)toastNode)?.SetAttribute("launch", new QueryString
+                {
+                    { "entityType", entityType },
+                    { "entityId", entity.Id }
+
+                }.ToString());
+
+            var toast = new ToastNotification(notificationXml)
+            {
+                ExpirationTime = DateTime.Now.AddSeconds(5)
+            };
+            toast.Dismissed += Toast_Dismissed;
+            ToastNotificationManager.CreateToastNotifier().Show(toast);
+        }
+
+        private static void Toast_Dismissed(ToastNotification sender, ToastDismissedEventArgs args)
+        {
+            var toastNode = sender.Content.SelectSingleNode("/toast");
+            var launchArguments = QueryString.Parse(((XmlElement)toastNode)?.GetAttribute("launch"));
+            var app = (App)Application.Current;
+            var entity = app.PendingDeleteEntities[launchArguments["entityId"]];
+            app.PendingDeleteEntities.Remove(launchArguments["entityId"]);
+            entity.CommitDelete();
+        }
+    }
+}