Add Navigations

2022-12-05 18:52:37 +00:00
parent 3b09265a30
commit 855a4b98d2
24 changed files with 532 additions and 1 deletions
@@ -0,0 +1,137 @@
+using Avalonia.Controls;
+using Avalonia.Controls.Primitives;
+using CommunityToolkit.Mvvm.Messaging;
+using FluentAvalonia.UI.Controls;
+
+namespace Toolkit.Foundation.Avalonia
+{
+    public class NavigationRouter : INavigationRouter
+    {
+        private readonly INavigationRouteDescriptorCollection descriptors;
+        private readonly IMessenger messenger;
+        private readonly INamedDataTemplateFactory namedDataTemplateFactory;
+        private readonly INamedTemplateFactory namedTemplateFactory;
+        private readonly ITemplateDescriptorProvider templateDescriptorProvider;
+        private readonly ITemplateFactory templateFactory;
+        private readonly ITypedDataTemplateFactory typedDataTemplateFactory;
+
+        public NavigationRouter(ITemplateDescriptorProvider templateDescriptorProvider,
+            ITemplateFactory templateFactory,
+            INamedTemplateFactory namedTemplateFactory,
+            INamedDataTemplateFactory namedDataTemplateFactory,
+            ITypedDataTemplateFactory typedDataTemplateFactory,
+            IMessenger messenger,
+            INavigationRouteDescriptorCollection descriptors)
+        {
+            this.templateDescriptorProvider = templateDescriptorProvider;
+            this.templateFactory = templateFactory;
+            this.namedTemplateFactory = namedTemplateFactory;
+            this.namedDataTemplateFactory = namedDataTemplateFactory;
+            this.typedDataTemplateFactory = typedDataTemplateFactory;
+            this.messenger = messenger;
+            this.descriptors = descriptors;
+        }
+
+        public Task InitializeAsync()
+        {
+            messenger.Register<Navigate>(this, (sender, args) => OnNavigate(args));
+            messenger.Register<NavigateBack>(this, (sender, args) => OnNavigateBack(args));
+
+            return Task.CompletedTask;
+        }
+
+        private async void OnNavigate(Navigate args)
+        {
+            object? data = null;
+            object? template = null;
+
+            Dictionary<string, object> keyedParameters = new();
+            List<object> parameters = new();
+
+            foreach (object? parameter in args.Parameters)
+            {
+                if (parameter is not null)
+                {
+                    if (parameter is KeyValuePair<string, object> keyed)
+                    {
+                        keyedParameters.Add(keyed.Key, keyed.Value);
+                    }
+                    else
+                    {
+                        parameters.Add(parameter);
+                    }
+                }
+            }
+
+            if (args.Name is { Length: > 0 } name)
+            {
+                data = namedDataTemplateFactory.Create(name, parameters.ToArray());
+                template = namedTemplateFactory.Create(name);
+            }
+
+            if (args.Type is Type type)
+            {
+                data = typedDataTemplateFactory.Create(type, parameters.ToArray());
+                template = templateFactory.Create(data);
+            }
+
+            if (template is not null)
+            {
+                bool navigated = false;
+                if (template is ContentDialog contentDialog)
+                {
+                    navigated = await messenger.Send(new NavigationRouteRequest<ContentDialog>(contentDialog, data, template, keyedParameters));
+                }
+                else
+                {
+                    if (descriptors.FirstOrDefault(x => args.Route is string { } name && name == x.Name) is NavigationRouteDescriptor descriptor)
+                    {
+                        switch (descriptor.Route)
+                        {
+                            case Frame frame:
+                                navigated = await messenger.Send(new NavigationRouteRequest<Frame>(frame, data, template, keyedParameters));
+                                break;
+                            case ContentControl contentControl:
+                                navigated = await messenger.Send(new NavigationRouteRequest<ContentControl>(contentControl, data, template, keyedParameters));
+                                break;
+                        }
+                    }
+                }
+
+                if (navigated)
+                {
+                    messenger.Send((Navigated)Navigated.Create((dynamic?)template, (dynamic?)data, keyedParameters));
+                }
+            }
+            else
+            {
+                if (descriptors.FirstOrDefault(x => args.Route is string { } name && name == x.Name) is NavigationRouteDescriptor descriptor)
+                {
+                    if (descriptor.Route is ContentControl contentControl)
+                    {
+                        contentControl.Content = null;
+                    }
+                }
+            }
+        }
+
+        private void OnNavigateBack(NavigateBack args)
+        {
+            if (descriptors.FirstOrDefault(x => args.Route is string { } name && name == x.Name) is NavigationRouteDescriptor descriptor)
+            {
+                if (descriptor.Route is ContentControl { Content: TemplatedControl content })
+                {
+                    if (content.DataContext is IDisposable disposable)
+                    {
+                        disposable.Dispose();
+                    }
+                }
+
+                if (descriptor.Route is Frame frame)
+                {
+                    frame.GoBack();
+                }
+            }
+        }
+    }
+}