From fa92395d1766a957d3a00ad74ddc9314ebac57ba Mon Sep 17 00:00:00 2001
From: Thomas Fransolet <tfransolet@thelis.be>
Date: Wed, 12 Aug 2026 17:46:37 +0200
Subject: [PATCH] D2 : exposer DateUpdate sur ResourceDTO pour le filtre
 incremental

Le client ne pouvait pas savoir qu'une ressource avait change : il ne
recevait que dateCreation. La colonne existait deja sur l'entite, elle
n'etait simplement pas serialisee.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
---
 .../Controllers/ResourceControllerTests.cs    | 30 +++++++++++++++++++
 ManagerService/DTOs/ResourceDTO.cs            |  1 +
 ManagerService/Data/Resource.cs               |  1 +
 3 files changed, 32 insertions(+)

diff --git a/ManagerService.Tests/Controllers/ResourceControllerTests.cs b/ManagerService.Tests/Controllers/ResourceControllerTests.cs
index ad60373..d3014e7 100644
--- a/ManagerService.Tests/Controllers/ResourceControllerTests.cs
+++ b/ManagerService.Tests/Controllers/ResourceControllerTests.cs
@@ -124,6 +124,36 @@ namespace ManagerService.Tests.Controllers
             Assert.Equal("New Label", db.Resources.First().Label);
         }
 
+        // D2 : `dateUpdate` est le seul signal de fraîcheur dont dispose la visite hors
+        // ligne. S'il cessait d'être exposé, le device garderait indéfiniment ses fichiers
+        // périmés — sans erreur, sans trace. D'où ces deux tests plutôt qu'une relecture.
+        [Fact]
+        public void ToDTO_ExposesDateUpdate()
+        {
+            using var db = DbContextFactory.Create();
+            db.Resources.Add(new Resource { Id = "r1", InstanceId = "inst-test", Label = "Img", Type = ResourceType.Image });
+            db.SaveChanges();
+
+            var dto = db.Resources.First().ToDTO();
+
+            Assert.NotEqual(default, dto.dateUpdate);
+            Assert.Equal(db.Resources.First().DateUpdate, dto.dateUpdate);
+        }
+
+        [Fact]
+        public void Update_AdvancesDateUpdate()
+        {
+            using var db = DbContextFactory.Create();
+            db.Resources.Add(new Resource { Id = "r1", InstanceId = "inst-test", Label = "Old", Type = ResourceType.Image });
+            db.SaveChanges();
+            var before = db.Resources.First().DateUpdate;
+
+            var result = BuildController(db).Update(new ResourceDTO { id = "r1", label = "New Label" });
+
+            var dto = Assert.IsType<OkObjectResult>(result).Value as ResourceDTO;
+            Assert.True(dto.dateUpdate > before);
+        }
+
         [Fact]
         public void Update_UnknownResource_Returns404()
         {
diff --git a/ManagerService/DTOs/ResourceDTO.cs b/ManagerService/DTOs/ResourceDTO.cs
index 55f71ee..cfa68ce 100644
--- a/ManagerService/DTOs/ResourceDTO.cs
+++ b/ManagerService/DTOs/ResourceDTO.cs
@@ -10,6 +10,7 @@ namespace ManagerService.DTOs
         public string label { get; set; }
         public string url { get; set; } // firebase url
         public DateTime dateCreation { get; set; }
+        public DateTime dateUpdate { get; set; }
         public string instanceId { get; set; }
         public long sizeBytes { get; set; }
     }
diff --git a/ManagerService/Data/Resource.cs b/ManagerService/Data/Resource.cs
index b08f291..011e782 100644
--- a/ManagerService/Data/Resource.cs
+++ b/ManagerService/Data/Resource.cs
@@ -75,6 +75,7 @@ namespace ManagerService.Data
                 type = Type,
                 url = Url,
                 dateCreation = DateCreation,
+                dateUpdate = DateUpdate,
                 instanceId = InstanceId,
                 sizeBytes = SizeBytes
             };