RombaSharp split Features too

RombaSharp/Features/EDiffdat.cs

@@ -0,0 +1,67 @@
+using System.Collections.Generic;
+using System.IO;
+
+using SabreTools.Library.Data;
+using SabreTools.Library.DatFiles;
+using SabreTools.Library.Filtering;
+using SabreTools.Library.Help;
+using SabreTools.Library.Tools;
+
+namespace RombaSharp.Features
+{
+    internal class EDiffdat : BaseFeature
+    {
+        public const string Value = "EDiffdat";
+
+        public EDiffdat()
+        {
+            Name = Value;
+            Flags = new List<string>() { "ediffdat" };
+            Description = "Creates a DAT file with those entries that are in -new DAT.";
+            _featureType = FeatureType.Flag;
+            LongDescription = @"Creates a DAT file with those entries that are in -new DAT files and not in -old DAT files. Ignores those entries in -old that are not in -new.";
+            Features = new Dictionary<string, Feature>();
+
+            AddFeature(OutStringInput);
+            AddFeature(OldStringInput);
+            AddFeature(NewStringInput);
+        }
+
+        public override void ProcessFeatures(Dictionary<string, Feature> features)
+        {
+            base.ProcessFeatures(features);
+
+            // Get feature flags
+            string olddat = GetString(features, OldStringValue);
+            string outdat = GetString(features, OutStringValue);
+            string newdat = GetString(features, NewStringValue);
+
+            // Ensure the output directory
+            DirectoryExtensions.Ensure(outdat, create: true);
+
+            // Check that all required files exist
+            if (!File.Exists(olddat))
+            {
+                Globals.Logger.Error($"File '{olddat}' does not exist!");
+                return;
+            }
+
+            if (!File.Exists(newdat))
+            {
+                Globals.Logger.Error($"File '{newdat}' does not exist!");
+                return;
+            }
+
+            // Create the encapsulating datfile
+            DatFile datfile = DatFile.Create();
+
+            // Create the inputs
+            List<string> dats = new List<string> { newdat };
+            List<string> basedats = new List<string> { olddat };
+
+            // Now run the diff on the inputs
+            datfile.DetermineUpdateType(dats, basedats, outdat, UpdateMode.DiffAgainst, false /* inplace */, false /* skip */,
+                new Filter(), new List<Field>(), false /* onlySame */);
+        }
+    }
+}