fix: guard Matrix42 optional service resolution

F4SDM42WebApi/F4SDM42WebApiController.cs

@@ -46,12 +46,57 @@ namespace C4IT.F4SD
         public F4SDM42WebApiController(IDependencyResolver resolver)
         {
             defaultInstance = this;
-            _entityDataService = resolver?.TryGet<IEntityDataService>();
-            _journalService = resolver?.TryGet<IJournalService>();
             _globalConfigurationProvider = GlobalConfigurationProvider.Instance;
             _f4stHelperService = new F4SDHelperService();
-            _userProfile = resolver?.TryGet<IPandoraUserProfile>();
             EnsureInitialized();
+            _entityDataService = ResolveOptional<IEntityDataService>(resolver);
+            _journalService = ResolveOptional<IJournalService>(resolver);
+            _userProfile = ResolveOptional<IPandoraUserProfile>(resolver);
+        }
+
+        private static T ResolveOptional<T>(IDependencyResolver resolver) where T : class
+        {
+            if (resolver == null)
+                return null;
+
+            try
+            {
+                if (!resolver.IsRegistered<T>())
+                    return null;
+            }
+            catch
+            {
+            }
+
+            try
+            {
+                return resolver.TryGet<T>();
+            }
+            catch (Exception ex)
+            {
+                LogOptionalDependencyFailure(typeof(T), ex);
+                return null;
+            }
+        }
+
+        private static void LogOptionalDependencyFailure(Type dependencyType, Exception exception)
+        {
+            try
+            {
+                LogEntry($"Matrix42 dependency '{dependencyType.FullName}' could not be resolved.", LogLevels.Warning);
+                LogException(exception);
+            }
+            catch
+            {
+            }
+        }
+
+        private HttpResponseMessage CreateMissingDependencyResponse(Type dependencyType)
+        {
+            return HttpResponseExtensions.CreateResponse(
+                Request,
+                HttpStatusCode.ServiceUnavailable,
+                $"Matrix42 dependency '{dependencyType.FullName}' is not registered for this extension context.");
         }
 
         private static readonly object initLock = new object();
@@ -278,6 +323,9 @@ namespace C4IT.F4SD
         public async Task<HttpResponseMessage> getPickup(string name, [FromUri] EntityEnumerationVisibilityMode mode = EntityEnumerationVisibilityMode.None, [FromUri] Int32 group = -1)
         {
             await Task.Delay(0);
+            if (_entityDataService == null)
+                return CreateMissingDependencyResponse(typeof(IEntityDataService));
+
             EntityEnumeration enumerationTemp = _entityDataService.GetEnumeration(name, mode);
             var vals = enumerationTemp.Values;
 
@@ -304,6 +352,9 @@ namespace C4IT.F4SD
         [Route("getMyRoleMemberships"), HttpGet]
         public async Task<HttpResponseMessage> getMyRoleMemberships()
         {
+            if (_userProfile == null)
+                return CreateMissingDependencyResponse(typeof(IPandoraUserProfile));
+
             var User = _userProfile.GetInteractiveUserInfo();
             var filter = AsqlHelper.BuildInCondition("ID", new Guid[] { User.Id });
             return HttpResponseExtensions.CreateResponse(Request, HttpStatusCode.OK, await _f4stHelperService.UserPermissionsInfo(filter));