added original file node

BasicNodes/BasicNodes.en.json

@@ -183,6 +183,12 @@
             "DeleteOriginal-Help": "If the original file should be deleted, this will only happen if the working file is different to the original file"
           }
         },
+        "OriginalFile": {
+          "Description": "Sets the current working file in the flow to the original file that started the flow",
+          "Outputs": {
+            "1": "Working file set to original file"
+          }
+        },
         "PatternMatch": {
           "Description": "Tests the working file and original file against a regular expression.\n\nOutput 1: Matches expression\nOutput 2: Does not match",
           "Outputs": {

BasicNodes/File/OriginalFile.cs

@@ -0,0 +1,21 @@
+namespace FileFlows.BasicNodes.File
+{
+    using System.Text;
+    using System.Text.RegularExpressions;
+    using FileFlows.Plugin;
+
+    public class OriginalFile : Node
+    {
+        public override int Inputs => 1;
+        public override int Outputs => 1;
+        public override string Icon => "fas fa-file";
+        public override FlowElementType Type => FlowElementType.Logic;
+
+        public override int Execute(NodeParameters args)
+        {
+            args.SetWorkingFile(args.FileName);
+            args.Logger?.ILog("Set working file to: " + args.FileName);
+            return 1;
+        }
+    }
+}