0.1.8

LanMontainDesktop/ComponentSystem/ComponentRegistry.cs

@@ -0,0 +1,74 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using LanMontainDesktop.ComponentSystem.Extensions;
+
+namespace LanMontainDesktop.ComponentSystem;
+
+public sealed class ComponentRegistry
+{
+    private readonly Dictionary<string, DesktopComponentDefinition> _definitions;
+
+    public ComponentRegistry(IEnumerable<DesktopComponentDefinition> definitions)
+    {
+        _definitions = definitions
+            .Where(d => !string.IsNullOrWhiteSpace(d.Id))
+            .GroupBy(d => d.Id, StringComparer.OrdinalIgnoreCase)
+            .ToDictionary(g => g.Key, g => g.Last(), StringComparer.OrdinalIgnoreCase);
+    }
+
+    public static ComponentRegistry CreateDefault()
+    {
+        var builtIn = new[]
+        {
+            new DesktopComponentDefinition(
+                BuiltInComponentIds.Clock,
+                "Clock",
+                "Clock",
+                "Status",
+                MinWidthCells: 1,
+                MinHeightCells: 1,
+                AllowStatusBarPlacement: true,
+                AllowDesktopPlacement: true)
+        };
+
+        return new ComponentRegistry(builtIn);
+    }
+
+    public ComponentRegistry RegisterExtensions(IEnumerable<IComponentExtensionProvider> providers)
+    {
+        var merged = _definitions.Values.ToList();
+        foreach (var provider in providers)
+        {
+            var externalDefinitions = provider.GetComponents();
+            if (externalDefinitions is null)
+            {
+                continue;
+            }
+
+            merged.AddRange(externalDefinitions);
+        }
+
+        return new ComponentRegistry(merged);
+    }
+
+    public bool TryGetDefinition(string componentId, out DesktopComponentDefinition definition)
+    {
+        return _definitions.TryGetValue(componentId, out definition!);
+    }
+
+    public bool IsKnownComponent(string componentId)
+    {
+        return _definitions.ContainsKey(componentId);
+    }
+
+    public bool AllowsStatusBarPlacement(string componentId)
+    {
+        return _definitions.TryGetValue(componentId, out var definition) && definition.AllowStatusBarPlacement;
+    }
+
+    public IReadOnlyList<DesktopComponentDefinition> GetAll()
+    {
+        return _definitions.Values.OrderBy(d => d.Category).ThenBy(d => d.DisplayName).ToList();
+    }
+}