Merge pull request #1 from php-etl/feature/fileName-function

feature/fileName-function : add fileName function

Author: gplanchat

src/FileName.php

@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Kiboko\Component\StringExpressionLanguage;
+
+use Symfony\Component\ExpressionLanguage\ExpressionFunction;
+
+final class FileName extends ExpressionFunction
+{
+    public function __construct($name)
+    {
+        parent::__construct(
+            $name,
+            \Closure::fromCallable([$this, 'compile'])->bindTo($this),
+            \Closure::fromCallable([$this, 'evaluate'])->bindTo($this)
+        );
+    }
+
+    private function compile($file)
+    {
+        return <<<COMPILED
+            (!is_string(${file}) ? null : pathinfo({$file}, PATHINFO_FILENAME))
+            COMPILED;
+    }
+
+    private function evaluate(array $context, $file)
+    {
+        return !is_string($file) ? null : pathinfo($file, PATHINFO_FILENAME);
+    }
+}

src/StringExpressionLanguageProvider.php

@@ -10,7 +10,8 @@ class StringExpressionLanguageProvider implements ExpressionFunctionProviderInte
     public function getFunctions(): array
     {
         return [
-            ExpressionFunction::fromPhp('sprintf', 'format')
+            ExpressionFunction::fromPhp('sprintf', 'format'),
+            new FileName('fileName')
         ];
     }
 }