New: Improve validation messages

(cherry picked from commit a117001de673e80abd90d54a34a7c86292b3a649)

src/NzbDrone.Core/Validation/FolderValidator.cs

@@ -6,7 +6,7 @@ namespace NzbDrone.Core.Validation
 {
     public class FolderValidator : PropertyValidator
     {
-        protected override string GetDefaultMessageTemplate() => "Invalid Path";
+        protected override string GetDefaultMessageTemplate() => "Invalid Path: '{path}'";
 
         protected override bool IsValid(PropertyValidatorContext context)
         {
@@ -15,6 +15,8 @@ namespace NzbDrone.Core.Validation
                 return false;
             }
 
+            context.MessageFormatter.AppendArgument("path", context.PropertyValue.ToString());
+
             return context.PropertyValue.ToString().IsPathValid(PathValidationType.CurrentOs);
         }
     }

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

@@ -12,7 +12,7 @@ namespace NzbDrone.Core.Validation.Paths
             _diskProvider = diskProvider;
         }
 
-        protected override string GetDefaultMessageTemplate() => "File does not exist";
+        protected override string GetDefaultMessageTemplate() => "File '{file}' does not exist";
 
         protected override bool IsValid(PropertyValidatorContext context)
         {
@@ -21,6 +21,8 @@ namespace NzbDrone.Core.Validation.Paths
                 return false;
             }
 
+            context.MessageFormatter.AppendArgument("file", context.PropertyValue.ToString());
+
             return _diskProvider.FileExists(context.PropertyValue.ToString());
         }
     }

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

@@ -13,7 +13,7 @@ namespace NzbDrone.Core.Validation.Paths
             _diskProvider = diskProvider;
         }
 
-        protected override string GetDefaultMessageTemplate() => $"Folder is not writable by user {Environment.UserName}";
+        protected override string GetDefaultMessageTemplate() => "Folder '{path}' is not writable by user '{user}'";
 
         protected override bool IsValid(PropertyValidatorContext context)
         {
@@ -22,6 +22,9 @@ namespace NzbDrone.Core.Validation.Paths
                 return false;
             }
 
+            context.MessageFormatter.AppendArgument("path", context.PropertyValue.ToString());
+            context.MessageFormatter.AppendArgument("user", Environment.UserName);
+
             return _diskProvider.FolderWritable(context.PropertyValue.ToString());
         }
     }

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

@@ -12,7 +12,7 @@ namespace NzbDrone.Core.Validation.Paths
             _diskProvider = diskProvider;
         }
 
-        protected override string GetDefaultMessageTemplate() => "Path does not exist";
+        protected override string GetDefaultMessageTemplate() => "Path '{path}' does not exist";
 
         protected override bool IsValid(PropertyValidatorContext context)
         {
@@ -21,6 +21,8 @@ namespace NzbDrone.Core.Validation.Paths
                 return false;
             }
 
+            context.MessageFormatter.AppendArgument("path", context.PropertyValue.ToString());
+
             return _diskProvider.FolderExists(context.PropertyValue.ToString());
         }
     }

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

@@ -15,7 +15,7 @@ namespace NzbDrone.Core.Validation.Paths
 
     public class PathValidator : PropertyValidator
     {
-        protected override string GetDefaultMessageTemplate() => "Invalid Path";
+        protected override string GetDefaultMessageTemplate() => "Invalid Path: '{path}'";
 
         protected override bool IsValid(PropertyValidatorContext context)
         {
@@ -24,6 +24,8 @@ namespace NzbDrone.Core.Validation.Paths
                 return false;
             }
 
+            context.MessageFormatter.AppendArgument("path", context.PropertyValue.ToString());
+
             return context.PropertyValue.ToString().IsPathValid(PathValidationType.CurrentOs);
         }
     }

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

@@ -13,7 +13,7 @@ namespace NzbDrone.Core.Validation.Paths
             _appFolderInfo = appFolderInfo;
         }
 
-        protected override string GetDefaultMessageTemplate() => "Path cannot be {relationship} the start up folder";
+        protected override string GetDefaultMessageTemplate() => "Path '{path}' cannot be {relationship} the start up folder";
 
         protected override bool IsValid(PropertyValidatorContext context)
         {
@@ -24,6 +24,7 @@ namespace NzbDrone.Core.Validation.Paths
 
             var startupFolder = _appFolderInfo.StartUpFolder;
             var folder = context.PropertyValue.ToString();
+            context.MessageFormatter.AppendArgument("path", folder);
 
             if (startupFolder.PathEquals(folder))
             {

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

@@ -6,11 +6,12 @@ namespace NzbDrone.Core.Validation.Paths
 {
     public class SystemFolderValidator : PropertyValidator
     {
-        protected override string GetDefaultMessageTemplate() => "Is {relationship} system folder {systemFolder}";
+        protected override string GetDefaultMessageTemplate() => "Path '{path}' is {relationship} system folder {systemFolder}";
 
         protected override bool IsValid(PropertyValidatorContext context)
         {
             var folder = context.PropertyValue.ToString();
+            context.MessageFormatter.AppendArgument("path", folder);
 
             foreach (var systemFolder in SystemFolders.GetSystemFolders())
             {

src/NzbDrone.Core/Validation/UrlValidator.cs

@@ -14,7 +14,7 @@ namespace NzbDrone.Core.Validation
 
     public class UrlValidator : PropertyValidator
     {
-        protected override string GetDefaultMessageTemplate() => "Invalid Url";
+        protected override string GetDefaultMessageTemplate() => "Invalid Url: '{url}'";
 
         protected override bool IsValid(PropertyValidatorContext context)
         {
@@ -23,6 +23,8 @@ namespace NzbDrone.Core.Validation
                 return false;
             }
 
+            context.MessageFormatter.AppendArgument("url", context.PropertyValue.ToString());
+
             return context.PropertyValue.ToString().IsValidUrl();
         }
     }