Initial Commit

classes/ResolverProvider.php

@@ -0,0 +1,39 @@
+<?php namespace GermanAirlinesVa\Graphql\Classes;
+
+use Closure;
+use Nuwave\Lighthouse\Schema\Values\FieldValue;
+use GraphQL\Type\Definition\ResolveInfo;
+use Cms\Classes\CodeParser;
+use Nuwave\Lighthouse\Schema\ResolverProvider as LighthouseResolverProvider;
+
+
+class ResolverProvider extends LighthouseResolverProvider {
+
+    /**
+     * Provide a field resolver in case no resolver directive is defined for a field.
+     *
+     * @param  \Nuwave\Lighthouse\Schema\Values\FieldValue  $fieldValue
+     * @return \Closure
+     */
+    public function provideResolver(FieldValue $fieldValue): Closure
+    {
+        return function ($root, array $args, $context, ResolveInfo $resolveInfo) use ($fieldValue) {
+            $fieldName = $fieldValue->getFieldName();
+            // use local graph resolver in code section if existent
+            if ($graphObj = $context->source->findGraph($fieldName)) {
+                /* @var $graphObj \GermanAirlinesVa\Graphql\Classes\Graph */
+                $parser = new CodeParser($graphObj);
+                $codeObj = $parser->source($graphObj, null, new GraphController($graphObj, $args));
+                $resolveMethod = 'resolve' . studly_case($fieldName);
+
+                if (method_exists($codeObj, $resolveMethod)) {
+                    return $codeObj->$resolveMethod($root, $args, $context, $resolveInfo);
+                }
+            }
+
+            // default resolver
+            return parent::provideResolver($fieldValue)($root, $args, $context, $resolveInfo);
+        };
+    }
+
+}