OSOE-867: Addressing analyzer warnings

Lombiq.TrainingDemo/Controllers/ApiController.cs

@@ -29,6 +29,11 @@ namespace Lombiq.TrainingDemo.Controllers;
 // endpoints should most of the time use the "Api" authentication scheme: This is not the same that standard users are
 // authenticated with (via cookies).
 [Authorize(AuthenticationSchemes = "Api"), IgnoreAntiforgeryToken, AllowAnonymous]
+[System.Diagnostics.CodeAnalysis.SuppressMessage(
+    "Major Code Smell",
+    "S6961:API Controllers should derive from ControllerBase instead of Controller",
+    Justification = "Can't be changed due to line 62. Will be applicable after an Orchard upgrade due to " +
+        "https://github.com/OrchardCMS/OrchardCore/issues/16186 being fixed.")]
 public class ApiController : Controller
 {
     private readonly IAuthorizationService _authorizationService;
@@ -46,6 +51,7 @@ public ApiController(IAuthorizationService authorizationService, IContentManager
     // authorize with a client ID and secret of an OpenID app set up from the Orchard admin. For more info see:
     // https://docs.orchardcore.net/en/latest/docs/reference/modules/OpenId/. If you just want to quickly test this API
     // then remove the Authorize attribute above.
+    [HttpGet]
     public async Task<IActionResult> Get(string contentItemId)
     {
         // Authorization is important in API endpoints as well of course. We're re-using the previously created

Lombiq.TrainingDemo/Controllers/CrossTenantServicesController.cs

@@ -38,6 +38,9 @@ public class CrossTenantServicesController : Controller
     [Route("CrossTenantServices")]
     public async Task<string> Index(string contentItemId)
     {
+        // If ModelState is not in a valid state we should abort the action and return null.
+        if (!ModelState.IsValid) return null;
+
         // Even if you don't create tenants, there will still be a single tenant in an Orchard app, the Default tenant.
         // For all other tenants you create you can provide the technical name.
 

Lombiq.TrainingDemo/Controllers/DatabaseStorageController.cs

@@ -103,8 +103,7 @@ public async Task<IActionResult> JKRosenzweigBooks()
     // NEXT STATION: Models/PersonPart.cs
 
     private static Book[] CreateDemoBooks() =>
-        new[]
-        {
+        [
             new Book
             {
                 CoverPhotoUrl = "/Lombiq.TrainingDemo/images/HarryPotter.jpg",
@@ -128,5 +127,5 @@ private static Book[] CreateDemoBooks() =>
                 Description = "The nation of Panay, formed from a post-apocalyptic North America, is a country " +
                     "that consists of a wealthy Capitol region surrounded by 12 poorer districts.",
             },
-        };
+        ];
 }

Lombiq.TrainingDemo/Controllers/FileManagementController.cs

@@ -104,7 +104,7 @@ public async Task<string> ReadFileFromMediaFolder()
     [HttpPost, ActionName(nameof(UploadFileToMedia)), ValidateAntiForgeryToken]
     public async Task<ActionResult> UploadFileToMediaPost(IFormFile file)
     {
-        if (file == null) return BadRequest();
+        if (!ModelState.IsValid || file == null) return BadRequest();
 
         // You can use the Combine method to combine paths which is pretty much equivalent to the built-in method.
         var mediaFilePath = _mediaFileStore.Combine(UploadedFileFolderRelativePath, file.FileName);

Lombiq.TrainingDemo/Permissions/DemoSettingsPermissions.cs

@@ -19,12 +19,11 @@ public Task<IEnumerable<Permission>> GetPermissionsAsync() =>
         .AsEnumerable());
 
     public IEnumerable<PermissionStereotype> GetDefaultStereotypes() =>
-        new[]
-        {
+        [
             new PermissionStereotype
             {
                 Name = "Administrator",
-                Permissions = new[] { ManageDemoSettings },
+                Permissions = [ManageDemoSettings],
             },
-        };
+        ];
 }

Lombiq.TrainingDemo/Permissions/PersonPermissions.cs

@@ -22,7 +22,7 @@ public class PersonPermissions : IPermissionProvider
     public static readonly Permission AccessPersonListDashboard = new(
         nameof(AccessPersonListDashboard),
         "Access the Person List dashboard",
-        new[] { ManagePersons });
+        [ManagePersons]);
 
     public Task<IEnumerable<Permission>> GetPermissionsAsync() =>
         Task.FromResult(new[]
@@ -34,21 +34,20 @@ public Task<IEnumerable<Permission>> GetPermissionsAsync() =>
 
     public IEnumerable<PermissionStereotype> GetDefaultStereotypes() =>
         // Giving some defaults: which roles should possess which permissions.
-        new[]
-        {
+        [
             new PermissionStereotype
             {
                 // Administrators will have all the permissions by default.
                 Name = "Administrator",
                 // Since AccessPersonListDashboard is implied by EditPersonList we don't have to list the former here.
-                Permissions = new[] { ManagePersons },
+                Permissions = [ManagePersons],
             },
             new PermissionStereotype
             {
                 Name = "Editor",
-                Permissions = new[] { AccessPersonListDashboard },
+                Permissions = [AccessPersonListDashboard],
             },
-        };
+        ];
 }
 
 // NEXT STATION: Go back to AuthorizationController and find the CanManagePersons action.

Lombiq.TrainingDemo/Services/DateTimeCachingService.cs

@@ -4,11 +4,16 @@
 using OrchardCore.Environment.Cache;
 using OrchardCore.Modules;
 using System;
+using System.Diagnostics.CodeAnalysis;
 using System.Globalization;
 using System.Threading.Tasks;
 
 namespace Lombiq.TrainingDemo.Services;
 
+[SuppressMessage(
+        "Usage",
+        "VSTHRD003:Avoid awaiting foreign Tasks",
+        Justification = "We need LocalNowAsync to create cachedDate.")]
 public class DateTimeCachingService : IDateTimeCachingService
 {
     public const string MemoryCacheKey = "Lombiq.TrainingDemo.MemoryCache.DateTime";

Lombiq.TrainingDemo/ViewModels/PersonPartViewModel.cs

@@ -34,7 +34,7 @@ public IEnumerable<ValidationResult> Validate(ValidationContext validationContex
 
         if (BirthDateUtc.HasValue && clock.UtcNow < BirthDateUtc.Value.AddYears(18))
         {
-            yield return new ValidationResult(localizer["The person must be 18 or older."], new[] { nameof(BirthDateUtc) });
+            yield return new ValidationResult(localizer["The person must be 18 or older."], [nameof(BirthDateUtc)]);
         }
 
         // Now go back to the PersonPartDisplayDriver.