NativePath, Editor, ToastMessageSink

src/GuiApp/FileTime.Avalonia/Services/ProgramsService.cs

@@ -0,0 +1,42 @@
+using System.Collections.Generic;
+using FileTime.Avalonia.Configuration;
+using Microsoft.Extensions.Options;
+
+namespace FileTime.Avalonia.Services
+{
+    public class ProgramsService
+    {
+        private readonly List<ProgramConfiguration> _editorPrograms;
+        private int lastGoodEditorProgramIndex;
+
+        public ProgramsService(IOptions<ProgramsConfiguration> configuration)
+        {
+            var config = configuration.Value;
+            _editorPrograms = config.EditorPrograms.Count == 0 ? config.DefaultEditorPrograms : config.EditorPrograms;
+        }
+
+        public ProgramConfiguration? GetEditorProgram(bool getNext = false)
+        {
+            if (getNext)
+            {
+                lastGoodEditorProgramIndex++;
+            }
+            if (lastGoodEditorProgramIndex < 0)
+            {
+                lastGoodEditorProgramIndex = 0;
+            }
+
+            if (_editorPrograms.Count <= lastGoodEditorProgramIndex)
+            {
+                ResetLastGoodEditor();
+                return null;
+            }
+            return _editorPrograms[lastGoodEditorProgramIndex];
+        }
+
+        public void ResetLastGoodEditor()
+        {
+            lastGoodEditorProgramIndex = -1;
+        }
+    }
+}