From 630f8a03f715bd5b6f7c7e8c179900ae95af78b3 Mon Sep 17 00:00:00 2001
From: Javier Cicchelli <javier@rock-n-code.com>
Date: Sun, 12 Oct 2025 13:57:54 +0200
Subject: [PATCH] Implemented the NotEmptyValidationRule type in the library
 target.

---
 .../NotEmptyValidationRule.swift              | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 Sources/DiscogsService/Internal/Validation Rules/NotEmptyValidationRule.swift

diff --git a/Sources/DiscogsService/Internal/Validation Rules/NotEmptyValidationRule.swift b/Sources/DiscogsService/Internal/Validation Rules/NotEmptyValidationRule.swift
new file mode 100644
index 000000000..dbcbfbfea
--- /dev/null
+++ b/Sources/DiscogsService/Internal/Validation Rules/NotEmptyValidationRule.swift	
@@ -0,0 +1,38 @@
+// ===----------------------------------------------------------------------===
+//
+// This source file is part of the DiscogsService open source project
+//
+// Copyright (c) 2025 Röck+Cöde VoF. and the DiscogsService project authors
+// Licensed under Apache license v2.0
+//
+// See LICENSE for license information
+// See CONTRIBUTORS for the list of DiscogsService project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// ===----------------------------------------------------------------------===
+
+/// A validation rule type that checks whether an input is empty or not.
+struct NotEmptyValidationRule: InputValidationRule {
+    
+    // MARK: Functions
+    
+    func validate(_ input: String?) throws -> Bool {
+        guard let input else {
+            return false
+        }
+        guard !input.isEmpty else {
+            throw InputValidationError.inputIsEmpty
+        }
+        
+        return true
+    }
+    
+}
+
+// MARK: - Constants
+
+extension InputValidationRule where Self == NotEmptyValidationRule {
+    /// A validation rule that checks whether an input is empty or not.
+    static var notEmpty: Self { .init() }
+}