Version 4.5.0

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

@@ -0,0 +1,60 @@
+<?php
+namespace GraphQL\Validator\Rules;
+
+use GraphQL\Error\Error;
+use GraphQL\Language\AST\NodeKind;
+use GraphQL\Language\AST\OperationDefinitionNode;
+use GraphQL\Language\AST\VariableDefinitionNode;
+use GraphQL\Validator\ValidationContext;
+
+/**
+ * Class NoUndefinedVariables
+ *
+ * A GraphQL operation is only valid if all variables encountered, both directly
+ * and via fragment spreads, are defined by that operation.
+ *
+ * @package GraphQL\Validator\Rules
+ */
+class NoUndefinedVariables extends AbstractValidationRule
+{
+    static function undefinedVarMessage($varName, $opName = null)
+    {
+        return $opName
+            ? "Variable \"$$varName\" is not defined by operation \"$opName\"."
+            : "Variable \"$$varName\" is not defined.";
+    }
+
+    public function getVisitor(ValidationContext $context)
+    {
+        $variableNameDefined = [];
+
+        return [
+            NodeKind::OPERATION_DEFINITION => [
+                'enter' => function() use (&$variableNameDefined) {
+                    $variableNameDefined = [];
+                },
+                'leave' => function(OperationDefinitionNode $operation) use (&$variableNameDefined, $context) {
+                    $usages = $context->getRecursiveVariableUsages($operation);
+
+                    foreach ($usages as $usage) {
+                        $node = $usage['node'];
+                        $varName = $node->name->value;
+
+                        if (empty($variableNameDefined[$varName])) {
+                            $context->reportError(new Error(
+                                self::undefinedVarMessage(
+                                    $varName,
+                                    $operation->name ? $operation->name->value : null
+                                ),
+                                [ $node, $operation ]
+                            ));
+                        }
+                    }
+                }
+            ],
+            NodeKind::VARIABLE_DEFINITION => function(VariableDefinitionNode $def) use (&$variableNameDefined) {
+                $variableNameDefined[$def->variable->name->value] = true;
+            }
+        ];
+    }
+}