Added assistant plugins (#659)

app/MindWork AI Studio/Tools/PluginSystem/Assistants/DataModel/AssistantImage.cs

@@ -0,0 +1,84 @@
+namespace AIStudio.Tools.PluginSystem.Assistants.DataModel;
+
+internal sealed class AssistantImage : AssistantComponentBase
+{
+    private const string PLUGIN_SCHEME = "plugin://";
+
+    public override AssistantComponentType Type => AssistantComponentType.IMAGE;
+    public override Dictionary<string, object> Props { get; set; } = new();
+    public override List<IAssistantComponent> Children { get; set; } = new();
+
+    public string Src
+    {
+        get => AssistantComponentPropHelper.ReadString(this.Props, nameof(this.Src));
+        set => AssistantComponentPropHelper.WriteString(this.Props, nameof(this.Src), value);
+    }
+
+    public string Alt
+    {
+        get => AssistantComponentPropHelper.ReadString(this.Props, nameof(this.Alt));
+        set => AssistantComponentPropHelper.WriteString(this.Props, nameof(this.Alt), value);
+    }
+
+    public string Caption
+    {
+        get => AssistantComponentPropHelper.ReadString(this.Props, nameof(this.Caption));
+        set => AssistantComponentPropHelper.WriteString(this.Props, nameof(this.Caption), value);
+    }
+
+    public string Class
+    {
+        get => AssistantComponentPropHelper.ReadString(this.Props, nameof(this.Class));
+        set => AssistantComponentPropHelper.WriteString(this.Props, nameof(this.Class), value);
+    }
+
+    public string Style
+    {
+        get => AssistantComponentPropHelper.ReadString(this.Props, nameof(this.Style));
+        set => AssistantComponentPropHelper.WriteString(this.Props, nameof(this.Style), value);
+    }
+
+    public string ResolveSource(string pluginPath)
+    {
+        if (string.IsNullOrWhiteSpace(this.Src))
+            return string.Empty;
+
+        var resolved = this.Src;
+
+        if (resolved.StartsWith(PLUGIN_SCHEME, StringComparison.OrdinalIgnoreCase) && !string.IsNullOrWhiteSpace(pluginPath))
+        {
+            var relative = resolved[PLUGIN_SCHEME.Length..]
+                .TrimStart('/', '\\')
+                .Replace('/', Path.DirectorySeparatorChar)
+                .Replace('\\', Path.DirectorySeparatorChar);
+            var filePath = Path.Join(pluginPath, relative);
+            if (!File.Exists(filePath))
+                return string.Empty;
+
+            var mime = GetImageMimeType(filePath);
+            var data = Convert.ToBase64String(File.ReadAllBytes(filePath));
+            return $"data:{mime};base64,{data}";
+        }
+
+        if (!Uri.TryCreate(resolved, UriKind.Absolute, out var uri))
+            return string.Empty;
+
+        return uri.Scheme is "http" or "https" or "data" ? resolved : string.Empty;
+    }
+
+    private static string GetImageMimeType(string path)
+    {
+        var extension = Path.GetExtension(path).TrimStart('.').ToLowerInvariant();
+        return extension switch
+        {
+            "svg" => "image/svg+xml",
+            "png" => "image/png",
+            "jpg" => "image/jpeg",
+            "jpeg" => "image/jpeg",
+            "gif" => "image/gif",
+            "webp" => "image/webp",
+            "bmp" => "image/bmp",
+            _ => "image/png",
+        };
+    }
+}