Add explicit JSON parsing

Author: bbatsche

src/Resolver/File.php

@@ -12,6 +12,16 @@
 
 class File extends AbstractResolver
 {
+    /**
+     * Possible values for encoding.
+     */
+    public const VALID_ENCODING_VALUES = ['utf-8', 'latin-1', 'binary'];
+
+    /**
+     * Possible values for parse.
+     */
+    public const VALID_PARSE_VALUES = ['auto', 'text', 'json', 'mustache', 'graphql'];
+
     /**
      * {@inheritdoc}
      */
@@ -40,15 +50,15 @@ public function isValid(Definition $definition): bool
         if ($definition->has('encoding')) {
             $encoding = $this->getIterator()->get('encoding', $definition);
 
-            if (!\in_array(strtolower($encoding), ['utf-8', 'latin-1', 'binary'])) {
+            if (!\in_array(strtolower($encoding), self::VALID_ENCODING_VALUES)) {
                 return false;
             }
         }
 
         if ($definition->has('parse')) {
             $parse = $this->getIterator()->get('parse', $definition);
 
-            if (!\in_array(strtolower($parse), ['auto', 'text'])) {
+            if (!\in_array(strtolower($parse), self::VALID_PARSE_VALUES)) {
                 return false;
             }
         }
@@ -83,7 +93,7 @@ public function resolve($definition)
 
         $content = file_get_contents($path);
 
-        if ($parse == 'auto' && pathinfo($path, PATHINFO_EXTENSION) == 'json') {
+        if (($parse == 'auto' && pathinfo($path, PATHINFO_EXTENSION) == 'json') || $parse == 'json') {
             $content = json_decode($content, true);
 
             if (json_last_error() !== JSON_ERROR_NONE) {