Initial commit

src/Input/Validator.php

@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+namespace pointybeard\Helpers\Cli\Input;
+
+class Validator implements Interfaces\InputValidatorInterface
+{
+    private $func;
+
+    public function __construct(\Closure $func)
+    {
+        // Check the closure used for validation meets requirements
+        $params = (new \ReflectionFunction($func))->getParameters();
+
+        // Must have exactly 2 params
+        if (2 != count($params)) {
+            throw new \Exception('Closure passed to Validator::__construct() is invalid: Must have exactly 2 parameters.');
+        }
+
+        // First must be 'input' and be of type pointybeard\Helpers\Cli\Input\AbstractInputType
+        if ('input' != $params[0]->getName() || __NAMESPACE__.'\AbstractInputType' != (string) $params[0]->getType()) {
+            throw new \Exception('Closure passed to Validator::__construct() is invalid: First parameter must match '.__NAMESPACE__."\AbstractInputType \$input. Provided with ".(string) $params[0]->getType()." \${$params[0]->getName()}");
+        }
+
+        // Second must be 'context' and be of type pointybeard\Helpers\Cli\Input\AbstractInputHandler
+        if ('context' != $params[1]->getName() || __NAMESPACE__.'\AbstractInputHandler' != (string) $params[1]->getType()) {
+            throw new \Exception('Closure passed to Validator::__construct() is invalid: Second parameter must match '.__NAMESPACE__."\AbstractInputHandler \$context. Provided with ".(string) $params[1]->getType()." \${$params[1]->getName()}");
+        }
+
+        $this->func = $func;
+    }
+
+    public function validate(AbstractInputType $input, AbstractInputHandler $context)
+    {
+        return ($this->func)($input, $context);
+    }
+}