Pulled out shared code from documentation commands

OpenRA.Mods.Common/UtilityCommands/Documentation/DocumentationHelpers.cs

@@ -0,0 +1,59 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using OpenRA.Mods.Common.UtilityCommands.Documentation.Objects;
+
+namespace OpenRA.Mods.Common.UtilityCommands.Documentation
+{
+	public static class DocumentationHelpers
+	{
+		public static IEnumerable<ExtractedClassFieldInfo> GetClassFieldInfos(Type type, IEnumerable<FieldLoader.FieldLoadInfo> fields,
+			HashSet<Type> relatedEnumTypes, ObjectCreator objectCreator)
+		{
+			return fields
+				.Select(fi =>
+				{
+					if (fi.Field.FieldType.IsEnum)
+						relatedEnumTypes.Add(fi.Field.FieldType);
+
+					return new ExtractedClassFieldInfo
+					{
+						PropertyName = fi.YamlName,
+						DefaultValue = FieldSaver.SaveField(objectCreator.CreateBasic(type), fi.Field.Name).Value.Value,
+						InternalType = Util.InternalTypeName(fi.Field.FieldType),
+						UserFriendlyType = Util.FriendlyTypeName(fi.Field.FieldType),
+						Description = string.Join(" ", Utility.GetCustomAttributes<DescAttribute>(fi.Field, true).SelectMany(d => d.Lines)),
+						OtherAttributes = fi.Field.CustomAttributes
+							.Where(a => a.AttributeType.Name != nameof(DescAttribute) && a.AttributeType.Name != nameof(FieldLoader.LoadUsingAttribute))
+							.Select(a =>
+							{
+								var name = a.AttributeType.Name;
+								name = name.EndsWith("Attribute", StringComparison.Ordinal) ? name[..^9] : name;
+
+								return new ExtractedClassFieldAttributeInfo
+								{
+									Name = name,
+									Parameters = a.Constructor.GetParameters()
+										.Select(pi => new ExtractedClassFieldAttributeInfo.Parameter
+										{
+											Name = pi.Name,
+											Value = Util.GetAttributeParameterValue(a.ConstructorArguments[pi.Position])
+										})
+								};
+							})
+					};
+				});
+		}
+
+		public static IEnumerable<ExtractedEnumInfo> GetRelatedEnumInfos(HashSet<Type> relatedEnumTypes)
+		{
+			return relatedEnumTypes.OrderBy(t => t.Name).Select(type => new ExtractedEnumInfo
+			{
+				Namespace = type.Namespace,
+				Name = type.Name,
+				Values = Enum.GetNames(type).ToDictionary(x => Convert.ToInt32(Enum.Parse(type, x), NumberFormatInfo.InvariantInfo), y => y)
+			});
+		}
+	}
+}