replace preg_match by a custom expression

Author: JoMessina

src/StringExpressionLanguageProvider.php

@@ -24,7 +24,7 @@ public function getFunctions(): array
             ExpressionFunction::fromPhp('strip_tags', 'stripHtml'),
             ExpressionFunction::fromPhp('json_decode', 'decode'),
             ExpressionFunction::fromPhp('preg_replace', 'replaceByExpression'),
-            ExpressionFunction::fromPhp('preg_match', 'matchExpression'),
+            new TestPattern('testPattern'),
             new CapitalizeWords('capitalizeWords'),
             ExpressionFunction::fromPhp('rtrim', 'removeWhitespaces'),
             ExpressionFunction::fromPhp('explode', 'splitIntoArray'),

src/TestPattern.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace Kiboko\Component\StringExpressionLanguage;
+
+class TestPattern
+{
+    public function __construct($name)
+    {
+        parent::__construct(
+            $name,
+            $this->compile(...)->bindTo($this),
+            $this->evaluate(...)->bindTo($this)
+        );
+    }
+
+    private function compile(string $pattern, string $subject): bool
+    {
+        return <<<PHP
+                \$result = preg_match({$pattern}, {$subject});
+                if (!\$result) {
+                    return false;
+                } else {
+                    return true;
+                }
+            PHP;
+    }
+
+    private function evaluate(array $context, string $pattern, string $subject): bool
+    {
+        $result = preg_match($pattern, $subject);
+        if (!$result) {
+            return false;
+        } else {
+            return true;
+        }
+    }
+}