Initial commit: OpenRA game engine

Fork from OpenRA/OpenRA with one-click launch script (start-ra.cmd)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

OpenRA.Game/Support/HttpQueryBuilder.cs

@@ -0,0 +1,59 @@
+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Text;
+
+namespace OpenRA.Support
+{
+	public class HttpQueryBuilder : IEnumerable<KeyValuePair<string, string>>
+	{
+		readonly string url;
+		readonly List<KeyValuePair<string, string>> parameters = [];
+
+		public HttpQueryBuilder(string url)
+		{
+			this.url = url;
+		}
+
+		public void Add(string name, object value)
+		{
+			parameters.Add(KeyValuePair.Create(
+				name,
+				Uri.EscapeDataString(value.ToString())));
+		}
+
+		public override string ToString()
+		{
+			var builder = new StringBuilder(url);
+
+			builder.Append('?');
+
+			foreach (var parameter in parameters)
+				builder.Append(CultureInfo.InvariantCulture, $"{parameter.Key}={parameter.Value}&");
+
+			return builder.ToString();
+		}
+
+		public IEnumerator<KeyValuePair<string, string>> GetEnumerator()
+		{
+			return parameters.GetEnumerator();
+		}
+
+		IEnumerator IEnumerable.GetEnumerator()
+		{
+			return GetEnumerator();
+		}
+	}
+}