Init

Prefab.Catalog/Domain/Exceptions/DomainException.cs

@@ -0,0 +1,19 @@
+namespace Prefab.Catalog.Domain.Exceptions;
+
+public abstract class DomainException(string message) : Exception(message);
+
+public sealed class CatalogNotFoundException(string resource, string identifier)
+    : DomainException($"{resource} with identifier '{identifier}' was not found.")
+{
+    public string Resource { get; } = resource;
+
+    public string Identifier { get; } = identifier;
+}
+
+public sealed class CatalogConflictException(string resource, string identifier, string detail)
+    : DomainException(detail)
+{
+    public string Resource { get; } = resource;
+
+    public string Identifier { get; } = identifier;
+}

Prefab.Catalog/Domain/Exceptions/DomainValidationException.cs

@@ -0,0 +1,8 @@
+namespace Prefab.Catalog.Domain.Exceptions;
+
+/// <summary>
+/// Represents a domain rule violation caused by invalid user input.
+/// </summary>
+/// <param name="message">Details about the validation failure.</param>
+public sealed class DomainValidationException(string message) : DomainException(message);
+

Prefab.Catalog/Domain/Exceptions/DuplicateNameException.cs

@@ -0,0 +1,14 @@
+namespace Prefab.Catalog.Domain.Exceptions;
+
+/// <summary>
+/// Represents an exception that is thrown when an attempt is made to create or add an entity with a name that already
+/// exists for the specified type.
+/// </summary>
+/// <param name="name">The name of the entity that caused the duplication error. Cannot be null.</param>
+/// <param name="type">The type of the entity for which the duplicate name was detected. Cannot be null.</param>
+internal class DuplicateNameException(string name, string type) : DomainException($"A {type} with the name {name} already exists.")
+{
+    public string Name { get; } = name;
+
+    public string Type { get; } = type;
+}