New: Add Validations for Recycle Bin Folder

src/NzbDrone.Core/Books/Utilities/AddAuthorValidator.cs

@@ -13,6 +13,7 @@ public interface IAddAuthorValidator
     public class AddAuthorValidator : AbstractValidator<Author>, IAddAuthorValidator
     {
         public AddAuthorValidator(RootFolderValidator rootFolderValidator,
+                                  RecycleBinValidator recycleBinValidator,
                                   AuthorPathValidator authorPathValidator,
                                   AuthorAncestorValidator authorAncestorValidator,
                                   QualityProfileExistsValidator qualityProfileExistsValidator,
@@ -21,6 +22,7 @@ public AddAuthorValidator(RootFolderValidator rootFolderValidator,
             RuleFor(c => c.Path).Cascade(CascadeMode.StopOnFirstFailure)
                                 .IsValidPath()
                                 .SetValidator(rootFolderValidator)
+                                .SetValidator(recycleBinValidator)
                                 .SetValidator(authorPathValidator)
                                 .SetValidator(authorAncestorValidator);
 

src/NzbDrone.Core/Validation/Paths/RecycleBinValidator.cs

@@ -0,0 +1,44 @@
+using FluentValidation.Validators;
+using NzbDrone.Common.Extensions;
+using NzbDrone.Core.Configuration;
+
+namespace NzbDrone.Core.Validation.Paths
+{
+    public class RecycleBinValidator : PropertyValidator
+    {
+        private readonly IConfigService _configService;
+
+        public RecycleBinValidator(IConfigService configService)
+            : base("Path is {relationship} configured recycle bin folder")
+        {
+            _configService = configService;
+        }
+
+        protected override bool IsValid(PropertyValidatorContext context)
+        {
+            var recycleBin = _configService.RecycleBin;
+            var folder = context.PropertyValue.ToString();
+
+            if (context.PropertyValue == null || recycleBin.IsNullOrWhiteSpace())
+            {
+                return true;
+            }
+
+            if (recycleBin.PathEquals(folder))
+            {
+                context.MessageFormatter.AppendArgument("relationship", "set to");
+
+                return false;
+            }
+
+            if (recycleBin.IsParentPath(folder))
+            {
+                context.MessageFormatter.AppendArgument("relationship", "child of");
+
+                return false;
+            }
+
+            return true;
+        }
+    }
+}

src/NzbDrone.Core/Validation/Paths/RootFolderAncestorValidator.cs

@@ -0,0 +1,28 @@
+using System.Linq;
+using FluentValidation.Validators;
+using NzbDrone.Common.Extensions;
+using NzbDrone.Core.RootFolders;
+
+namespace NzbDrone.Core.Validation.Paths
+{
+    public class RootFolderAncestorValidator : PropertyValidator
+    {
+        private readonly IRootFolderService _rootFolderService;
+
+        public RootFolderAncestorValidator(IRootFolderService rootFolderService)
+            : base("Path is an ancestor of an existing root folder")
+        {
+            _rootFolderService = rootFolderService;
+        }
+
+        protected override bool IsValid(PropertyValidatorContext context)
+        {
+            if (context.PropertyValue == null)
+            {
+                return true;
+            }
+
+            return !_rootFolderService.All().Any(s => context.PropertyValue.ToString().IsParentPath(s.Path));
+        }
+    }
+}

src/Readarr.Api.V1/Author/AuthorController.cs

@@ -51,6 +51,7 @@ public AuthorController(IBroadcastSignalRMessage signalRBroadcaster,
                             IMapCoversToLocal coverMapper,
                             IManageCommandQueue commandQueueManager,
                             IRootFolderService rootFolderService,
+                            RecycleBinValidator recycleBinValidator,
                             RootFolderValidator rootFolderValidator,
                             MappedNetworkDriveValidator mappedNetworkDriveValidator,
                             AuthorPathValidator authorPathValidator,
@@ -80,6 +81,7 @@ public AuthorController(IBroadcastSignalRMessage signalRBroadcaster,
                            .SetValidator(mappedNetworkDriveValidator)
                            .SetValidator(authorPathValidator)
                            .SetValidator(authorAncestorValidator)
+                           .SetValidator(recycleBinValidator)
                            .SetValidator(systemFolderValidator)
                            .When(s => !s.Path.IsNullOrWhiteSpace());
 

src/Readarr.Api.V1/Config/MediaManagementConfigController.cs

@@ -10,12 +10,28 @@ namespace Readarr.Api.V1.Config
     [V1ApiController("config/mediamanagement")]
     public class MediaManagementConfigController : ConfigController<MediaManagementConfigResource>
     {
-        public MediaManagementConfigController(IConfigService configService, PathExistsValidator pathExistsValidator, FolderChmodValidator folderChmodValidator)
+        public MediaManagementConfigController(IConfigService configService,
+                                           PathExistsValidator pathExistsValidator,
+                                           FolderChmodValidator folderChmodValidator,
+                                           FolderWritableValidator folderWritableValidator,
+                                           AuthorPathValidator authorPathValidator,
+                                           StartupFolderValidator startupFolderValidator,
+                                           SystemFolderValidator systemFolderValidator,
+                                           RootFolderAncestorValidator rootFolderAncestorValidator,
+                                           RootFolderValidator rootFolderValidator)
             : base(configService)
         {
+            SharedValidator.RuleFor(c => c.RecycleBin).IsValidPath()
+                                                      .SetValidator(folderWritableValidator)
+                                                      .SetValidator(rootFolderValidator)
+                                                      .SetValidator(pathExistsValidator)
+                                                      .SetValidator(authorPathValidator)
+                                                      .SetValidator(rootFolderAncestorValidator)
+                                                      .SetValidator(startupFolderValidator)
+                                                      .SetValidator(systemFolderValidator)
+                                                      .When(c => !string.IsNullOrWhiteSpace(c.RecycleBin));
             SharedValidator.RuleFor(c => c.RecycleBinCleanupDays).GreaterThanOrEqualTo(0);
             SharedValidator.RuleFor(c => c.ChmodFolder).SetValidator(folderChmodValidator).When(c => !string.IsNullOrEmpty(c.ChmodFolder) && (OsInfo.IsLinux || OsInfo.IsOsx));
-            SharedValidator.RuleFor(c => c.RecycleBin).IsValidPath().SetValidator(pathExistsValidator).When(c => !string.IsNullOrWhiteSpace(c.RecycleBin));
             SharedValidator.RuleFor(c => c.MinimumFreeSpaceWhenImporting).GreaterThanOrEqualTo(100);
         }
 

src/Readarr.Api.V1/RootFolders/RootFolderController.cs

@@ -25,6 +25,7 @@ public class RootFolderController : RestControllerWithSignalR<RootFolderResource
         public RootFolderController(IRootFolderService rootFolderService,
                                 ICalibreProxy calibreProxy,
                                 IBroadcastSignalRMessage signalRBroadcaster,
+                                RecycleBinValidator recycleBinValidator,
                                 RootFolderValidator rootFolderValidator,
                                 PathExistsValidator pathExistsValidator,
                                 MappedNetworkDriveValidator mappedNetworkDriveValidator,
@@ -43,6 +44,7 @@ public RootFolderController(IRootFolderService rootFolderService,
                 .IsValidPath()
                 .SetValidator(mappedNetworkDriveValidator)
                 .SetValidator(startupFolderValidator)
+                .SetValidator(recycleBinValidator)
                 .SetValidator(pathExistsValidator)
                 .SetValidator(systemFolderValidator)
                 .SetValidator(folderWritableValidator);