Version 4.5.0

system/3rd_party/graphql-php/Validator/Rules/UniqueArgumentNames.php

@@ -0,0 +1,45 @@
+<?php
+namespace GraphQL\Validator\Rules;
+
+use GraphQL\Error\Error;
+use GraphQL\Language\AST\ArgumentNode;
+use GraphQL\Language\AST\Node;
+use GraphQL\Language\AST\NodeKind;
+use GraphQL\Language\Visitor;
+use GraphQL\Validator\ValidationContext;
+
+class UniqueArgumentNames extends AbstractValidationRule
+{
+    static function duplicateArgMessage($argName)
+    {
+        return "There can be only one argument named \"$argName\".";
+    }
+
+    public $knownArgNames;
+
+    public function getVisitor(ValidationContext $context)
+    {
+        $this->knownArgNames = [];
+
+        return [
+            NodeKind::FIELD => function () {
+                $this->knownArgNames = [];;
+            },
+            NodeKind::DIRECTIVE => function () {
+                $this->knownArgNames = [];
+            },
+            NodeKind::ARGUMENT => function (ArgumentNode $node) use ($context) {
+                $argName = $node->name->value;
+                if (!empty($this->knownArgNames[$argName])) {
+                    $context->reportError(new Error(
+                        self::duplicateArgMessage($argName),
+                        [$this->knownArgNames[$argName], $node->name]
+                    ));
+                } else {
+                    $this->knownArgNames[$argName] = $node->name;
+                }
+                return Visitor::skipNode();
+            }
+        ];
+    }
+}