Create WireMock.Net.ProtoBuf project (#1350)

* Create WireMock.Net.ProtoBuf project

* ok

* Update Directory.Build.props

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

src/WireMock.Net.ProtoBuf/Util/ProtoDefinitionDataHelper.cs

@@ -0,0 +1,80 @@
+// Copyright © WireMock.Net
+
+using System.Collections.Generic;
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+using ProtoBufJsonConverter;
+using ProtoBufJsonConverter.Models;
+using Stef.Validation;
+using WireMock.Models;
+
+namespace WireMock.Util;
+
+/// <summary>
+/// Some helper methods for Proto Definitions.
+/// </summary>
+internal static class ProtoDefinitionDataHelper
+{
+    /// <summary>
+    /// Builds a dictionary of ProtoDefinitions from a directory.
+    /// - The key will be the filename without extension.
+    /// - The value will be the ProtoDefinition with an extra comment with the relative path to each <c>.proto</c> file so it can be used by the WireMockProtoFileResolver.
+    /// </summary>
+    /// <param name="directory">The directory to start from.</param>
+    /// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <c>System.Threading.CancellationToken.None</c>.</param>
+    public static async Task<ProtoDefinitionData> FromDirectory(string directory, CancellationToken cancellationToken = default)
+    {
+        Guard.NotNullOrEmpty(directory);
+
+        var fileNameMappedToProtoDefinition = new Dictionary<string, string>();
+        var filePaths = Directory.EnumerateFiles(directory, "*.proto", SearchOption.AllDirectories);
+
+        foreach (var filePath in filePaths)
+        {
+            // Get the relative path to the directory (note that this will be OS specific).
+            var relativePath = FilePathUtils.GetRelativePath(directory, filePath);
+
+            // Make it a valid proto import path
+            var protoRelativePath = relativePath.Replace(Path.DirectorySeparatorChar, '/');
+
+            // Build comment and get content from file.
+            var comment = $"// {protoRelativePath}";
+#if NETSTANDARD2_0 || NET462
+            var content = File.ReadAllText(filePath);
+#else
+            var content = await File.ReadAllTextAsync(filePath, cancellationToken);
+#endif
+            // Only add the comment if it's not already defined.
+            var modifiedContent = !content.StartsWith(comment) ? $"{comment}\n{content}" : content;
+            var key = Path.GetFileNameWithoutExtension(filePath);
+
+            fileNameMappedToProtoDefinition.Add(key, modifiedContent);
+        }
+
+        var converter = SingletonFactory<Converter>.GetInstance();
+        var resolver = new WireMockProtoFileResolver(fileNameMappedToProtoDefinition.Values);
+
+        var messageTypeMappedToWithProtoDefinition = new Dictionary<string, string>();
+
+        foreach (var protoDefinition in fileNameMappedToProtoDefinition.Values)
+        {
+            var infoRequest = new GetInformationRequest(protoDefinition, resolver);
+
+            try
+            {
+                var info = await converter.GetInformationAsync(infoRequest, cancellationToken);
+                foreach (var messageType  in info.MessageTypes)
+                {
+                    messageTypeMappedToWithProtoDefinition[messageType.Key] = protoDefinition;
+                }
+            }
+            catch
+            {
+                // Ignore
+            }
+        }
+
+        return new ProtoDefinitionData(fileNameMappedToProtoDefinition);
+    }
+}