Initial

Terminal/Validation/PathValidators.cs

@@ -0,0 +1,32 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Terminal.Validation;
+
+public class ValidPathAttribute : ValidationAttribute
+{
+    protected override ValidationResult IsValid(object? value, ValidationContext validationContext)
+    {
+        if (value is string path)
+        {
+            try
+            {
+                path = Environment.ExpandEnvironmentVariables(path);
+                var info = new FileInfo(path);
+                if (info.Exists)
+                    return ValidationResult.Success!;
+                
+                using (var stream = info.Create())
+                    stream.Close();
+            
+                info.Delete();
+                return ValidationResult.Success!;
+            }
+            catch
+            {
+                return new ValidationResult($"The path '{path}' is not valid.");
+            }
+        }
+        
+        return new ValidationResult($"The path '{value}' is not valid.");
+    }
+}