chore: throw exception if node/mjml not found

fixes

Signed-off-by: Fred Carlsen <[email protected]>

src/exceptions/MJMLNotFoundException.php

@@ -0,0 +1,33 @@
+<?php
+/**
+ * MJML plugin for Craft CMS 3.x
+ *
+ * Render Twig emails with MJML, the only framework that makes responsive email easy.
+ *
+ * @link      https://superbig.co
+ * @copyright Copyright (c) 2018 Superbig
+ */
+
+namespace superbig\mjml\exceptions;
+
+use yii\base\Exception;
+
+/**
+ * @author    Superbig
+ * @package   MJML
+ * @since     1.0.0
+ */
+class MJMLException extends RuntimeException
+{
+    public $cliCommand = '';
+
+    public function setCliCommand(string $cmd)
+    {
+        $this->cliCommand = $cmd;
+    }
+
+    public function getCliCommand()
+    {
+        return $this->cliCommand;
+    }
+}

src/services/MJMLService.php

@@ -24,6 +24,7 @@
 use superbig\mjml\models\MJMLModel;
 use yii\base\ErrorException;
 use yii\base\Exception;
+use yii\base\InvalidConfigException;
 
 /**
  * @author    Superbig
@@ -125,6 +126,16 @@ public function parseCli(?string $html = null): ?MJMLModel
         $tempPath = Craft::$app->getPath()->getTempPath() . "/mjml/mjml-{$hash}.html";
         $tempOutputPath = Craft::$app->getPath()->getTempPath() . "/mjml/mjml-output-{$hash}.html";
 
+        // Check if Node.js exists
+        if (!file_exists($nodePath)) {
+            throw new InvalidConfigException("Node.js executable not found at path: {$nodePath}");
+        }
+
+        // Check if MJML CLI exists
+        if (!file_exists($mjmlCliPath)) {
+            throw new InvalidConfigException("MJML CLI executable not found at path: {$mjmlCliPath}");
+        }
+
         try {
             if (!file_exists($tempOutputPath)) {
                 FileHelper::writeToFile($tempPath, $html);