From 72b9f7e66e2b095d027ca8f78016d1bc76418c65 Mon Sep 17 00:00:00 2001
From: Joseph Doherty <dohejw01@gmail.com>
Date: Mon, 11 May 2026 11:02:03 -0400
Subject: [PATCH] feat(template-engine): TemplateService.MoveTemplateAsync

---
 .../TemplateService.cs                        | 25 +++++++++++
 .../TemplateServiceTests.cs                   | 43 +++++++++++++++++++
 2 files changed, 68 insertions(+)

diff --git a/src/ScadaLink.TemplateEngine/TemplateService.cs b/src/ScadaLink.TemplateEngine/TemplateService.cs
index c41a215..dc83f66 100644
--- a/src/ScadaLink.TemplateEngine/TemplateService.cs
+++ b/src/ScadaLink.TemplateEngine/TemplateService.cs
@@ -155,6 +155,31 @@ public class TemplateService
         return Result<bool>.Success(true);
     }
 
+    public async Task<Result<Template>> MoveTemplateAsync(
+        int templateId,
+        int? newFolderId,
+        string user,
+        CancellationToken cancellationToken = default)
+    {
+        var template = await _repository.GetTemplateByIdAsync(templateId, cancellationToken);
+        if (template == null)
+            return Result<Template>.Failure($"Template with ID {templateId} not found.");
+
+        if (newFolderId.HasValue)
+        {
+            var folder = await _repository.GetFolderByIdAsync(newFolderId.Value, cancellationToken);
+            if (folder == null)
+                return Result<Template>.Failure($"Target folder with ID {newFolderId.Value} not found.");
+        }
+
+        template.FolderId = newFolderId;
+        await _repository.UpdateTemplateAsync(template, cancellationToken);
+        await _repository.SaveChangesAsync(cancellationToken);
+        await _auditService.LogAsync(user, "Move", "Template", template.Id.ToString(), template.Name, template, cancellationToken);
+
+        return Result<Template>.Success(template);
+    }
+
     public async Task<Template?> GetTemplateByIdAsync(int templateId, CancellationToken cancellationToken = default)
     {
         return await _repository.GetTemplateByIdAsync(templateId, cancellationToken);
diff --git a/tests/ScadaLink.TemplateEngine.Tests/TemplateServiceTests.cs b/tests/ScadaLink.TemplateEngine.Tests/TemplateServiceTests.cs
index 81de706..72c37e4 100644
--- a/tests/ScadaLink.TemplateEngine.Tests/TemplateServiceTests.cs
+++ b/tests/ScadaLink.TemplateEngine.Tests/TemplateServiceTests.cs
@@ -507,4 +507,47 @@ public class TemplateServiceTests
         Assert.True(result.IsFailure);
         Assert.Contains("cycle", result.Error, StringComparison.OrdinalIgnoreCase);
     }
+
+    // ========================================================================
+    // Move template between folders
+    // ========================================================================
+
+    [Fact]
+    public async Task MoveTemplate_ToFolder_ReturnsSuccess()
+    {
+        var t = new Template("X") { Id = 1, FolderId = null };
+        var folder = new TemplateFolder("Dev") { Id = 7 };
+        _repoMock.Setup(r => r.GetTemplateByIdAsync(1, It.IsAny<CancellationToken>())).ReturnsAsync(t);
+        _repoMock.Setup(r => r.GetFolderByIdAsync(7, It.IsAny<CancellationToken>())).ReturnsAsync(folder);
+
+        var result = await _service.MoveTemplateAsync(1, 7, "admin");
+
+        Assert.True(result.IsSuccess);
+        Assert.Equal(7, result.Value.FolderId);
+    }
+
+    [Fact]
+    public async Task MoveTemplate_ToRoot_ReturnsSuccess()
+    {
+        var t = new Template("X") { Id = 1, FolderId = 7 };
+        _repoMock.Setup(r => r.GetTemplateByIdAsync(1, It.IsAny<CancellationToken>())).ReturnsAsync(t);
+
+        var result = await _service.MoveTemplateAsync(1, null, "admin");
+
+        Assert.True(result.IsSuccess);
+        Assert.Null(result.Value.FolderId);
+    }
+
+    [Fact]
+    public async Task MoveTemplate_TargetFolderMissing_ReturnsFailure()
+    {
+        var t = new Template("X") { Id = 1 };
+        _repoMock.Setup(r => r.GetTemplateByIdAsync(1, It.IsAny<CancellationToken>())).ReturnsAsync(t);
+        _repoMock.Setup(r => r.GetFolderByIdAsync(99, It.IsAny<CancellationToken>())).ReturnsAsync((TemplateFolder?)null);
+
+        var result = await _service.MoveTemplateAsync(1, 99, "admin");
+
+        Assert.True(result.IsFailure);
+        Assert.Contains("not found", result.Error);
+    }
 }