NotEmpty Validator Input Filter Affordances

InputFilter needs access to the internal message templates of the `NotEmpty` validator in order to present error messages when a required field is empty. This patch re-introduces `getMessageTemplates` only on the NotEmpty validator and marks the method as internal.

Signed-off-by: George Steel <[email protected]>

src/NotEmpty.php

@@ -260,4 +260,22 @@ public function isValid(mixed $value): bool
 
         return true;
     }
+
+    /**
+     * Return the configured message templates
+     *
+     * This method is an affordance to laminas-inputfilter.
+     * It needs to introspect configured message templates in order to provide a default error message for empty inputs.
+     *
+     * In future versions of laminas-validator, this method will likely be deprecated and removed. Please avoid.
+     *
+     * @internal
+     *
+     * @psalm-internal \Laminas
+     * @return array<string, string>
+     */
+    public function getMessageTemplates(): array
+    {
+        return $this->messageTemplates;
+    }
 }

test/NotEmptyTest.php

@@ -695,4 +695,13 @@ public static function arrayConfigNotationWithoutKeyProvider(): array
             [null, true],
         ];
     }
+
+    public function testRetrievalOfMessageTemplates(): void
+    {
+        /** @psalm-suppress InternalMethod */
+        $templates = (new NotEmpty())->getMessageTemplates();
+        self::assertNotSame([], $templates);
+        self::assertArrayHasKey(NotEmpty::IS_EMPTY, $templates);
+        self::assertArrayHasKey(NotEmpty::INVALID, $templates);
+    }
 }