Added HTML → Markdown conversion tool

markdown-to-html/src/McpSamples.MarkdownToHtml.HybridApp/McpSamples.MarkdownToHtml.HybridApp.csproj

@@ -15,6 +15,7 @@
 
   <ItemGroup>
     <PackageReference Include="Markdig" Version="0.*" />
+    <PackageReference Include="ReverseMarkdown" Version="4.7.0" />
   </ItemGroup>
 
   <ItemGroup>

markdown-to-html/src/McpSamples.MarkdownToHtml.HybridApp/Tools/HtmlToMarkdownTool.cs

@@ -0,0 +1,47 @@
+using System.ComponentModel;
+using ReverseMarkdown;
+
+using ModelContextProtocol.Server;
+
+namespace McpSamples.MarkdownToHtml.HybridApp.Tools;
+
+/// <summary>
+/// This provides interfaces for the HTML to markdown tool.
+/// </summary>
+public interface IHtmlToMarkdownTool
+{
+    /// <summary>
+    /// Converts HTML text to markdown.
+    /// </summary>
+    /// <param name="html"></param>
+    /// <returns></returns>
+    Task<string> ConvertAsync(string html);
+}
+
+/// <summary>
+/// This represents the tool entity for converting HTML to markdown.
+/// </summary>
+/// <param name="logger"></param>
+[McpServerToolType]
+public class HtmlToMarkdownTool(ILogger<HtmlToMarkdownTool> logger) : IHtmlToMarkdownTool
+{
+    [McpServerTool(Name = "convert_html_to_markdown", Title = "Convert HTML to Markdown")]
+    [Description("Converts HTML text to Markdown.")]
+    public async Task<string> ConvertAsync([Description("The HTML text")] string html)
+    {
+        var converter = new Converter();
+        var markdown = default(string);
+
+        try
+        {
+            markdown = converter.Convert(html);
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Error converting HTML to Markdown");
+            markdown = $"Error: {ex.Message}";
+        }
+
+        return await Task.FromResult(markdown);
+    }
+}