Vendor

vendor/webonyx/graphql-php/src/Language/AST/ArgumentNode.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class ArgumentNode extends Node
+{
+    /** @var string */
+    public $kind = NodeKind::ARGUMENT;
+
+    /** @var ValueNode */
+    public $value;
+
+    /** @var NameNode */
+    public $name;
+}

vendor/webonyx/graphql-php/src/Language/AST/BooleanValueNode.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class BooleanValueNode extends Node implements ValueNode
+{
+    /** @var string */
+    public $kind = NodeKind::BOOLEAN;
+
+    /** @var bool */
+    public $value;
+}

vendor/webonyx/graphql-php/src/Language/AST/DefinitionNode.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+/**
+ * export type DefinitionNode =
+ *   | ExecutableDefinitionNode
+ *   | TypeSystemDefinitionNode; // experimental non-spec addition.
+ */
+interface DefinitionNode
+{
+}

vendor/webonyx/graphql-php/src/Language/AST/DirectiveDefinitionNode.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class DirectiveDefinitionNode extends Node implements TypeSystemDefinitionNode
+{
+    /** @var string */
+    public $kind = NodeKind::DIRECTIVE_DEFINITION;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var ArgumentNode[] */
+    public $arguments;
+
+    /** @var NameNode[] */
+    public $locations;
+
+    /** @var StringValueNode|null */
+    public $description;
+}

vendor/webonyx/graphql-php/src/Language/AST/DirectiveNode.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class DirectiveNode extends Node
+{
+    /** @var string */
+    public $kind = NodeKind::DIRECTIVE;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var ArgumentNode[] */
+    public $arguments;
+}

vendor/webonyx/graphql-php/src/Language/AST/DocumentNode.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class DocumentNode extends Node
+{
+    /** @var string */
+    public $kind = NodeKind::DOCUMENT;
+
+    /** @var NodeList|DefinitionNode[] */
+    public $definitions;
+}

vendor/webonyx/graphql-php/src/Language/AST/EnumTypeDefinitionNode.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class EnumTypeDefinitionNode extends Node implements TypeDefinitionNode
+{
+    /** @var string */
+    public $kind = NodeKind::ENUM_TYPE_DEFINITION;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var DirectiveNode[] */
+    public $directives;
+
+    /** @var EnumValueDefinitionNode[]|NodeList|null */
+    public $values;
+
+    /** @var StringValueNode|null */
+    public $description;
+}

vendor/webonyx/graphql-php/src/Language/AST/EnumTypeExtensionNode.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class EnumTypeExtensionNode extends Node implements TypeExtensionNode
+{
+    /** @var string */
+    public $kind = NodeKind::ENUM_TYPE_EXTENSION;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var DirectiveNode[]|null */
+    public $directives;
+
+    /** @var EnumValueDefinitionNode[]|null */
+    public $values;
+}

vendor/webonyx/graphql-php/src/Language/AST/EnumValueDefinitionNode.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class EnumValueDefinitionNode extends Node
+{
+    /** @var string */
+    public $kind = NodeKind::ENUM_VALUE_DEFINITION;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var DirectiveNode[] */
+    public $directives;
+
+    /** @var StringValueNode|null */
+    public $description;
+}

vendor/webonyx/graphql-php/src/Language/AST/EnumValueNode.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class EnumValueNode extends Node implements ValueNode
+{
+    /** @var string */
+    public $kind = NodeKind::ENUM;
+
+    /** @var string */
+    public $value;
+}

vendor/webonyx/graphql-php/src/Language/AST/ExecutableDefinitionNode.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+/**
+ * export type ExecutableDefinitionNode =
+ *   | OperationDefinitionNode
+ *   | FragmentDefinitionNode;
+ */
+interface ExecutableDefinitionNode extends DefinitionNode
+{
+}

vendor/webonyx/graphql-php/src/Language/AST/FieldDefinitionNode.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class FieldDefinitionNode extends Node
+{
+    /** @var string */
+    public $kind = NodeKind::FIELD_DEFINITION;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var InputValueDefinitionNode[]|NodeList */
+    public $arguments;
+
+    /** @var TypeNode */
+    public $type;
+
+    /** @var DirectiveNode[]|NodeList */
+    public $directives;
+
+    /** @var StringValueNode|null */
+    public $description;
+}

vendor/webonyx/graphql-php/src/Language/AST/FieldNode.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class FieldNode extends Node implements SelectionNode
+{
+    /** @var string */
+    public $kind = NodeKind::FIELD;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var NameNode|null */
+    public $alias;
+
+    /** @var ArgumentNode[]|null */
+    public $arguments;
+
+    /** @var DirectiveNode[]|null */
+    public $directives;
+
+    /** @var SelectionSetNode|null */
+    public $selectionSet;
+}

vendor/webonyx/graphql-php/src/Language/AST/FloatValueNode.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class FloatValueNode extends Node implements ValueNode
+{
+    /** @var string */
+    public $kind = NodeKind::FLOAT;
+
+    /** @var string */
+    public $value;
+}

vendor/webonyx/graphql-php/src/Language/AST/FragmentDefinitionNode.php

@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class FragmentDefinitionNode extends Node implements ExecutableDefinitionNode, HasSelectionSet
+{
+    /** @var string */
+    public $kind = NodeKind::FRAGMENT_DEFINITION;
+
+    /** @var NameNode */
+    public $name;
+
+    /**
+     * Note: fragment variable definitions are experimental and may be changed
+     * or removed in the future.
+     *
+     * @var VariableDefinitionNode[]|NodeList
+     */
+    public $variableDefinitions;
+
+    /** @var NamedTypeNode */
+    public $typeCondition;
+
+    /** @var DirectiveNode[]|NodeList */
+    public $directives;
+
+    /** @var SelectionSetNode */
+    public $selectionSet;
+}

vendor/webonyx/graphql-php/src/Language/AST/FragmentSpreadNode.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class FragmentSpreadNode extends Node implements SelectionNode
+{
+    /** @var string */
+    public $kind = NodeKind::FRAGMENT_SPREAD;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var DirectiveNode[] */
+    public $directives;
+}

vendor/webonyx/graphql-php/src/Language/AST/HasSelectionSet.php

@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+interface HasSelectionSet
+{
+    /**
+     * export type DefinitionNode = OperationDefinitionNode
+     *                        | FragmentDefinitionNode
+     */
+}

vendor/webonyx/graphql-php/src/Language/AST/InlineFragmentNode.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class InlineFragmentNode extends Node implements SelectionNode
+{
+    /** @var string */
+    public $kind = NodeKind::INLINE_FRAGMENT;
+
+    /** @var NamedTypeNode */
+    public $typeCondition;
+
+    /** @var DirectiveNode[]|null */
+    public $directives;
+
+    /** @var SelectionSetNode */
+    public $selectionSet;
+}

vendor/webonyx/graphql-php/src/Language/AST/InputObjectTypeDefinitionNode.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class InputObjectTypeDefinitionNode extends Node implements TypeDefinitionNode
+{
+    /** @var string */
+    public $kind = NodeKind::INPUT_OBJECT_TYPE_DEFINITION;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var DirectiveNode[]|null */
+    public $directives;
+
+    /** @var InputValueDefinitionNode[]|null */
+    public $fields;
+
+    /** @var StringValueNode|null */
+    public $description;
+}

vendor/webonyx/graphql-php/src/Language/AST/InputObjectTypeExtensionNode.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class InputObjectTypeExtensionNode extends Node implements TypeExtensionNode
+{
+    /** @var string */
+    public $kind = NodeKind::INPUT_OBJECT_TYPE_EXTENSION;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var DirectiveNode[]|null */
+    public $directives;
+
+    /** @var InputValueDefinitionNode[]|null */
+    public $fields;
+}

vendor/webonyx/graphql-php/src/Language/AST/InputValueDefinitionNode.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class InputValueDefinitionNode extends Node
+{
+    /** @var string */
+    public $kind = NodeKind::INPUT_VALUE_DEFINITION;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var TypeNode */
+    public $type;
+
+    /** @var ValueNode */
+    public $defaultValue;
+
+    /** @var DirectiveNode[] */
+    public $directives;
+
+    /** @var StringValueNode|null */
+    public $description;
+}

vendor/webonyx/graphql-php/src/Language/AST/IntValueNode.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class IntValueNode extends Node implements ValueNode
+{
+    /** @var string */
+    public $kind = NodeKind::INT;
+
+    /** @var string */
+    public $value;
+}

vendor/webonyx/graphql-php/src/Language/AST/InterfaceTypeDefinitionNode.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class InterfaceTypeDefinitionNode extends Node implements TypeDefinitionNode
+{
+    /** @var string */
+    public $kind = NodeKind::INTERFACE_TYPE_DEFINITION;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var DirectiveNode[]|null */
+    public $directives;
+
+    /** @var FieldDefinitionNode[]|null */
+    public $fields;
+
+    /** @var StringValueNode|null */
+    public $description;
+}

vendor/webonyx/graphql-php/src/Language/AST/InterfaceTypeExtensionNode.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class InterfaceTypeExtensionNode extends Node implements TypeExtensionNode
+{
+    /** @var string */
+    public $kind = NodeKind::INTERFACE_TYPE_EXTENSION;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var DirectiveNode[]|null */
+    public $directives;
+
+    /** @var FieldDefinitionNode[]|null */
+    public $fields;
+}

vendor/webonyx/graphql-php/src/Language/AST/ListTypeNode.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class ListTypeNode extends Node implements TypeNode
+{
+    /** @var string */
+    public $kind = NodeKind::LIST_TYPE;
+
+    /** @var Node */
+    public $type;
+}

vendor/webonyx/graphql-php/src/Language/AST/ListValueNode.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class ListValueNode extends Node implements ValueNode
+{
+    /** @var string */
+    public $kind = NodeKind::LST;
+
+    /** @var ValueNode[]|NodeList */
+    public $values;
+}

vendor/webonyx/graphql-php/src/Language/AST/Location.php

@@ -0,0 +1,79 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+use GraphQL\Language\Source;
+use GraphQL\Language\Token;
+
+/**
+ * Contains a range of UTF-8 character offsets and token references that
+ * identify the region of the source from which the AST derived.
+ */
+class Location
+{
+    /**
+     * The character offset at which this Node begins.
+     *
+     * @var int
+     */
+    public $start;
+
+    /**
+     * The character offset at which this Node ends.
+     *
+     * @var int
+     */
+    public $end;
+
+    /**
+     * The Token at which this Node begins.
+     *
+     * @var Token
+     */
+    public $startToken;
+
+    /**
+     * The Token at which this Node ends.
+     *
+     * @var Token
+     */
+    public $endToken;
+
+    /**
+     * The Source document the AST represents.
+     *
+     * @var Source|null
+     */
+    public $source;
+
+    /**
+     * @param int $start
+     * @param int $end
+     *
+     * @return static
+     */
+    public static function create($start, $end)
+    {
+        $tmp        = new static();
+        $tmp->start = $start;
+        $tmp->end   = $end;
+
+        return $tmp;
+    }
+
+    public function __construct(?Token $startToken = null, ?Token $endToken = null, ?Source $source = null)
+    {
+        $this->startToken = $startToken;
+        $this->endToken   = $endToken;
+        $this->source     = $source;
+
+        if (! $startToken || ! $endToken) {
+            return;
+        }
+
+        $this->start = $startToken->start;
+        $this->end   = $endToken->end;
+    }
+}

vendor/webonyx/graphql-php/src/Language/AST/NameNode.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class NameNode extends Node implements TypeNode
+{
+    /** @var string */
+    public $kind = NodeKind::NAME;
+
+    /** @var string */
+    public $value;
+}

vendor/webonyx/graphql-php/src/Language/AST/NamedTypeNode.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class NamedTypeNode extends Node implements TypeNode
+{
+    /** @var string */
+    public $kind = NodeKind::NAMED_TYPE;
+
+    /** @var NameNode */
+    public $name;
+}

vendor/webonyx/graphql-php/src/Language/AST/Node.php

@@ -0,0 +1,162 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+use GraphQL\Utils\Utils;
+use function get_object_vars;
+use function is_array;
+use function is_scalar;
+use function json_encode;
+
+/**
+ * type Node = NameNode
+ * | DocumentNode
+ * | OperationDefinitionNode
+ * | VariableDefinitionNode
+ * | VariableNode
+ * | SelectionSetNode
+ * | FieldNode
+ * | ArgumentNode
+ * | FragmentSpreadNode
+ * | InlineFragmentNode
+ * | FragmentDefinitionNode
+ * | IntValueNode
+ * | FloatValueNode
+ * | StringValueNode
+ * | BooleanValueNode
+ * | EnumValueNode
+ * | ListValueNode
+ * | ObjectValueNode
+ * | ObjectFieldNode
+ * | DirectiveNode
+ * | ListTypeNode
+ * | NonNullTypeNode
+ */
+abstract class Node
+{
+    /** @var Location */
+    public $loc;
+
+    /**
+     * @param (NameNode|NodeList|SelectionSetNode|Location|string|int|bool|float|null)[] $vars
+     */
+    public function __construct(array $vars)
+    {
+        if (empty($vars)) {
+            return;
+        }
+
+        Utils::assign($this, $vars);
+    }
+
+    /**
+     * @return self
+     */
+    public function cloneDeep()
+    {
+        return $this->cloneValue($this);
+    }
+
+    /**
+     * @param string|NodeList|Location|Node|(Node|NodeList|Location)[] $value
+     *
+     * @return string|NodeList|Location|Node
+     */
+    private function cloneValue($value)
+    {
+        if (is_array($value)) {
+            $cloned = [];
+            foreach ($value as $key => $arrValue) {
+                $cloned[$key] = $this->cloneValue($arrValue);
+            }
+        } elseif ($value instanceof self) {
+            $cloned = clone $value;
+            foreach (get_object_vars($cloned) as $prop => $propValue) {
+                $cloned->{$prop} = $this->cloneValue($propValue);
+            }
+        } else {
+            $cloned = $value;
+        }
+
+        return $cloned;
+    }
+
+    /**
+     * @return string
+     */
+    public function __toString()
+    {
+        $tmp = $this->toArray(true);
+
+        return (string) json_encode($tmp);
+    }
+
+    /**
+     * @param bool $recursive
+     *
+     * @return mixed[]
+     */
+    public function toArray($recursive = false)
+    {
+        if ($recursive) {
+            return $this->recursiveToArray($this);
+        }
+
+        $tmp = (array) $this;
+
+        if ($this->loc) {
+            $tmp['loc'] = [
+                'start' => $this->loc->start,
+                'end'   => $this->loc->end,
+            ];
+        }
+
+        return $tmp;
+    }
+
+    /**
+     * @return mixed[]
+     */
+    private function recursiveToArray(Node $node)
+    {
+        $result = [
+            'kind' => $node->kind,
+        ];
+
+        if ($node->loc) {
+            $result['loc'] = [
+                'start' => $node->loc->start,
+                'end'   => $node->loc->end,
+            ];
+        }
+
+        foreach (get_object_vars($node) as $prop => $propValue) {
+            if (isset($result[$prop])) {
+                continue;
+            }
+
+            if ($propValue === null) {
+                continue;
+            }
+
+            if (is_array($propValue) || $propValue instanceof NodeList) {
+                $tmp = [];
+                foreach ($propValue as $tmp1) {
+                    $tmp[] = $tmp1 instanceof Node ? $this->recursiveToArray($tmp1) : (array) $tmp1;
+                }
+            } elseif ($propValue instanceof Node) {
+                $tmp = $this->recursiveToArray($propValue);
+            } elseif (is_scalar($propValue) || $propValue === null) {
+                $tmp = $propValue;
+            } else {
+                $tmp = null;
+            }
+
+            $result[$prop] = $tmp;
+        }
+
+        return $result;
+    }
+}

vendor/webonyx/graphql-php/src/Language/AST/NodeKind.php

@@ -0,0 +1,138 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class NodeKind
+{
+    // constants from language/kinds.js:
+
+    const NAME = 'Name';
+    // Document
+
+    const DOCUMENT             = 'Document';
+    const OPERATION_DEFINITION = 'OperationDefinition';
+    const VARIABLE_DEFINITION  = 'VariableDefinition';
+    const VARIABLE             = 'Variable';
+    const SELECTION_SET        = 'SelectionSet';
+    const FIELD                = 'Field';
+    const ARGUMENT             = 'Argument';
+    // Fragments
+
+    const FRAGMENT_SPREAD     = 'FragmentSpread';
+    const INLINE_FRAGMENT     = 'InlineFragment';
+    const FRAGMENT_DEFINITION = 'FragmentDefinition';
+    // Values
+
+    const INT          = 'IntValue';
+    const FLOAT        = 'FloatValue';
+    const STRING       = 'StringValue';
+    const BOOLEAN      = 'BooleanValue';
+    const ENUM         = 'EnumValue';
+    const NULL         = 'NullValue';
+    const LST          = 'ListValue';
+    const OBJECT       = 'ObjectValue';
+    const OBJECT_FIELD = 'ObjectField';
+    // Directives
+
+    const DIRECTIVE = 'Directive';
+    // Types
+
+    const NAMED_TYPE    = 'NamedType';
+    const LIST_TYPE     = 'ListType';
+    const NON_NULL_TYPE = 'NonNullType';
+    // Type System Definitions
+
+    const SCHEMA_DEFINITION         = 'SchemaDefinition';
+    const OPERATION_TYPE_DEFINITION = 'OperationTypeDefinition';
+    // Type Definitions
+
+    const SCALAR_TYPE_DEFINITION       = 'ScalarTypeDefinition';
+    const OBJECT_TYPE_DEFINITION       = 'ObjectTypeDefinition';
+    const FIELD_DEFINITION             = 'FieldDefinition';
+    const INPUT_VALUE_DEFINITION       = 'InputValueDefinition';
+    const INTERFACE_TYPE_DEFINITION    = 'InterfaceTypeDefinition';
+    const UNION_TYPE_DEFINITION        = 'UnionTypeDefinition';
+    const ENUM_TYPE_DEFINITION         = 'EnumTypeDefinition';
+    const ENUM_VALUE_DEFINITION        = 'EnumValueDefinition';
+    const INPUT_OBJECT_TYPE_DEFINITION = 'InputObjectTypeDefinition';
+    // Type Extensions
+
+    const SCALAR_TYPE_EXTENSION       = 'ScalarTypeExtension';
+    const OBJECT_TYPE_EXTENSION       = 'ObjectTypeExtension';
+    const INTERFACE_TYPE_EXTENSION    = 'InterfaceTypeExtension';
+    const UNION_TYPE_EXTENSION        = 'UnionTypeExtension';
+    const ENUM_TYPE_EXTENSION         = 'EnumTypeExtension';
+    const INPUT_OBJECT_TYPE_EXTENSION = 'InputObjectTypeExtension';
+    // Directive Definitions
+
+    const DIRECTIVE_DEFINITION = 'DirectiveDefinition';
+
+    // Type System Extensions
+    const SCHEMA_EXTENSION = 'SchemaExtension';
+
+    /** @var string[] */
+    public static $classMap = [
+        self::NAME                         => NameNode::class,
+
+        // Document
+        self::DOCUMENT                     => DocumentNode::class,
+        self::OPERATION_DEFINITION         => OperationDefinitionNode::class,
+        self::VARIABLE_DEFINITION          => VariableDefinitionNode::class,
+        self::VARIABLE                     => VariableNode::class,
+        self::SELECTION_SET                => SelectionSetNode::class,
+        self::FIELD                        => FieldNode::class,
+        self::ARGUMENT                     => ArgumentNode::class,
+
+        // Fragments
+        self::FRAGMENT_SPREAD              => FragmentSpreadNode::class,
+        self::INLINE_FRAGMENT              => InlineFragmentNode::class,
+        self::FRAGMENT_DEFINITION          => FragmentDefinitionNode::class,
+
+        // Values
+        self::INT                          => IntValueNode::class,
+        self::FLOAT                        => FloatValueNode::class,
+        self::STRING                       => StringValueNode::class,
+        self::BOOLEAN                      => BooleanValueNode::class,
+        self::ENUM                         => EnumValueNode::class,
+        self::NULL                         => NullValueNode::class,
+        self::LST                          => ListValueNode::class,
+        self::OBJECT                       => ObjectValueNode::class,
+        self::OBJECT_FIELD                 => ObjectFieldNode::class,
+
+        // Directives
+        self::DIRECTIVE                    => DirectiveNode::class,
+
+        // Types
+        self::NAMED_TYPE                   => NamedTypeNode::class,
+        self::LIST_TYPE                    => ListTypeNode::class,
+        self::NON_NULL_TYPE                => NonNullTypeNode::class,
+
+        // Type System Definitions
+        self::SCHEMA_DEFINITION            => SchemaDefinitionNode::class,
+        self::OPERATION_TYPE_DEFINITION    => OperationTypeDefinitionNode::class,
+
+        // Type Definitions
+        self::SCALAR_TYPE_DEFINITION       => ScalarTypeDefinitionNode::class,
+        self::OBJECT_TYPE_DEFINITION       => ObjectTypeDefinitionNode::class,
+        self::FIELD_DEFINITION             => FieldDefinitionNode::class,
+        self::INPUT_VALUE_DEFINITION       => InputValueDefinitionNode::class,
+        self::INTERFACE_TYPE_DEFINITION    => InterfaceTypeDefinitionNode::class,
+        self::UNION_TYPE_DEFINITION        => UnionTypeDefinitionNode::class,
+        self::ENUM_TYPE_DEFINITION         => EnumTypeDefinitionNode::class,
+        self::ENUM_VALUE_DEFINITION        => EnumValueDefinitionNode::class,
+        self::INPUT_OBJECT_TYPE_DEFINITION => InputObjectTypeDefinitionNode::class,
+
+        // Type Extensions
+        self::SCALAR_TYPE_EXTENSION        => ScalarTypeExtensionNode::class,
+        self::OBJECT_TYPE_EXTENSION        => ObjectTypeExtensionNode::class,
+        self::INTERFACE_TYPE_EXTENSION     => InterfaceTypeExtensionNode::class,
+        self::UNION_TYPE_EXTENSION         => UnionTypeExtensionNode::class,
+        self::ENUM_TYPE_EXTENSION          => EnumTypeExtensionNode::class,
+        self::INPUT_OBJECT_TYPE_EXTENSION  => InputObjectTypeExtensionNode::class,
+
+        // Directive Definitions
+        self::DIRECTIVE_DEFINITION         => DirectiveDefinitionNode::class,
+    ];
+}

vendor/webonyx/graphql-php/src/Language/AST/NodeList.php

@@ -0,0 +1,129 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+use ArrayAccess;
+use Countable;
+use Generator;
+use GraphQL\Utils\AST;
+use IteratorAggregate;
+use function array_merge;
+use function array_splice;
+use function count;
+use function is_array;
+
+class NodeList implements ArrayAccess, IteratorAggregate, Countable
+{
+    /** @var Node[]|mixed[] */
+    private $nodes;
+
+    /**
+     * @param Node[]|mixed[] $nodes
+     *
+     * @return static
+     */
+    public static function create(array $nodes)
+    {
+        return new static($nodes);
+    }
+
+    /**
+     * @param Node[]|mixed[] $nodes
+     */
+    public function __construct(array $nodes)
+    {
+        $this->nodes = $nodes;
+    }
+
+    /**
+     * @param mixed $offset
+     *
+     * @return bool
+     */
+    public function offsetExists($offset)
+    {
+        return isset($this->nodes[$offset]);
+    }
+
+    /**
+     * @param mixed $offset
+     *
+     * @return mixed
+     */
+    public function offsetGet($offset)
+    {
+        $item = $this->nodes[$offset];
+
+        if (is_array($item) && isset($item['kind'])) {
+            $this->nodes[$offset] = $item = AST::fromArray($item);
+        }
+
+        return $item;
+    }
+
+    /**
+     * @param mixed $offset
+     * @param mixed $value
+     */
+    public function offsetSet($offset, $value)
+    {
+        if (is_array($value) && isset($value['kind'])) {
+            $value = AST::fromArray($value);
+        }
+        $this->nodes[$offset] = $value;
+    }
+
+    /**
+     * @param mixed $offset
+     */
+    public function offsetUnset($offset)
+    {
+        unset($this->nodes[$offset]);
+    }
+
+    /**
+     * @param int   $offset
+     * @param int   $length
+     * @param mixed $replacement
+     *
+     * @return NodeList
+     */
+    public function splice($offset, $length, $replacement = null)
+    {
+        return new NodeList(array_splice($this->nodes, $offset, $length, $replacement));
+    }
+
+    /**
+     * @param NodeList|Node[] $list
+     *
+     * @return NodeList
+     */
+    public function merge($list)
+    {
+        if ($list instanceof self) {
+            $list = $list->nodes;
+        }
+
+        return new NodeList(array_merge($this->nodes, $list));
+    }
+
+    /**
+     * @return Generator
+     */
+    public function getIterator()
+    {
+        foreach ($this->nodes as $key => $_) {
+            yield $this->offsetGet($key);
+        }
+    }
+
+    /**
+     * @return int
+     */
+    public function count()
+    {
+        return count($this->nodes);
+    }
+}

vendor/webonyx/graphql-php/src/Language/AST/NonNullTypeNode.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class NonNullTypeNode extends Node implements TypeNode
+{
+    /** @var string */
+    public $kind = NodeKind::NON_NULL_TYPE;
+
+    /** @var NameNode | ListTypeNode */
+    public $type;
+}

vendor/webonyx/graphql-php/src/Language/AST/NullValueNode.php

@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class NullValueNode extends Node implements ValueNode
+{
+    /** @var string */
+    public $kind = NodeKind::NULL;
+}

vendor/webonyx/graphql-php/src/Language/AST/ObjectFieldNode.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class ObjectFieldNode extends Node
+{
+    /** @var string */
+    public $kind = NodeKind::OBJECT_FIELD;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var ValueNode */
+    public $value;
+}

vendor/webonyx/graphql-php/src/Language/AST/ObjectTypeDefinitionNode.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class ObjectTypeDefinitionNode extends Node implements TypeDefinitionNode
+{
+    /** @var string */
+    public $kind = NodeKind::OBJECT_TYPE_DEFINITION;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var NamedTypeNode[] */
+    public $interfaces = [];
+
+    /** @var DirectiveNode[]|null */
+    public $directives;
+
+    /** @var FieldDefinitionNode[]|null */
+    public $fields;
+
+    /** @var StringValueNode|null */
+    public $description;
+}

vendor/webonyx/graphql-php/src/Language/AST/ObjectTypeExtensionNode.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class ObjectTypeExtensionNode extends Node implements TypeExtensionNode
+{
+    /** @var string */
+    public $kind = NodeKind::OBJECT_TYPE_EXTENSION;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var NamedTypeNode[] */
+    public $interfaces = [];
+
+    /** @var DirectiveNode[] */
+    public $directives;
+
+    /** @var FieldDefinitionNode[] */
+    public $fields;
+}

vendor/webonyx/graphql-php/src/Language/AST/ObjectValueNode.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class ObjectValueNode extends Node implements ValueNode
+{
+    /** @var string */
+    public $kind = NodeKind::OBJECT;
+
+    /** @var ObjectFieldNode[]|NodeList */
+    public $fields;
+}

vendor/webonyx/graphql-php/src/Language/AST/OperationDefinitionNode.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class OperationDefinitionNode extends Node implements ExecutableDefinitionNode, HasSelectionSet
+{
+    /** @var string */
+    public $kind = NodeKind::OPERATION_DEFINITION;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var string (oneOf 'query', 'mutation')) */
+    public $operation;
+
+    /** @var VariableDefinitionNode[] */
+    public $variableDefinitions;
+
+    /** @var DirectiveNode[] */
+    public $directives;
+
+    /** @var SelectionSetNode */
+    public $selectionSet;
+}

vendor/webonyx/graphql-php/src/Language/AST/OperationTypeDefinitionNode.php

@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class OperationTypeDefinitionNode extends Node
+{
+    /** @var string */
+    public $kind = NodeKind::OPERATION_TYPE_DEFINITION;
+
+    /**
+     * One of 'query' | 'mutation' | 'subscription'
+     *
+     * @var string
+     */
+    public $operation;
+
+    /** @var NamedTypeNode */
+    public $type;
+}

vendor/webonyx/graphql-php/src/Language/AST/ScalarTypeDefinitionNode.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class ScalarTypeDefinitionNode extends Node implements TypeDefinitionNode
+{
+    /** @var string */
+    public $kind = NodeKind::SCALAR_TYPE_DEFINITION;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var DirectiveNode[] */
+    public $directives;
+
+    /** @var StringValueNode|null */
+    public $description;
+}

vendor/webonyx/graphql-php/src/Language/AST/ScalarTypeExtensionNode.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class ScalarTypeExtensionNode extends Node implements TypeExtensionNode
+{
+    /** @var string */
+    public $kind = NodeKind::SCALAR_TYPE_EXTENSION;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var DirectiveNode[]|null */
+    public $directives;
+}

vendor/webonyx/graphql-php/src/Language/AST/SchemaDefinitionNode.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class SchemaDefinitionNode extends Node implements TypeSystemDefinitionNode
+{
+    /** @var string */
+    public $kind = NodeKind::SCHEMA_DEFINITION;
+
+    /** @var DirectiveNode[] */
+    public $directives;
+
+    /** @var OperationTypeDefinitionNode[] */
+    public $operationTypes;
+}

vendor/webonyx/graphql-php/src/Language/AST/SchemaTypeExtensionNode.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class SchemaTypeExtensionNode extends Node implements TypeExtensionNode
+{
+    /** @var string */
+    public $kind = NodeKind::SCHEMA_EXTENSION;
+
+    /** @var DirectiveNode[]|null */
+    public $directives;
+
+    /** @var OperationTypeDefinitionNode[]|null */
+    public $operationTypes;
+}

vendor/webonyx/graphql-php/src/Language/AST/SelectionNode.php

@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+/**
+ * export type SelectionNode = FieldNode | FragmentSpreadNode | InlineFragmentNode
+ */
+interface SelectionNode
+{
+}

vendor/webonyx/graphql-php/src/Language/AST/SelectionSetNode.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class SelectionSetNode extends Node
+{
+    /** @var string */
+    public $kind = NodeKind::SELECTION_SET;
+
+    /** @var SelectionNode[] */
+    public $selections;
+}

vendor/webonyx/graphql-php/src/Language/AST/StringValueNode.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class StringValueNode extends Node implements ValueNode
+{
+    /** @var string */
+    public $kind = NodeKind::STRING;
+
+    /** @var string */
+    public $value;
+
+    /** @var bool|null */
+    public $block;
+}

vendor/webonyx/graphql-php/src/Language/AST/TypeDefinitionNode.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+/**
+ * export type TypeDefinitionNode = ScalarTypeDefinitionNode
+ * | ObjectTypeDefinitionNode
+ * | InterfaceTypeDefinitionNode
+ * | UnionTypeDefinitionNode
+ * | EnumTypeDefinitionNode
+ * | InputObjectTypeDefinitionNode
+ */
+interface TypeDefinitionNode extends TypeSystemDefinitionNode
+{
+}

vendor/webonyx/graphql-php/src/Language/AST/TypeExtensionNode.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+/**
+ * export type TypeExtensionNode =
+ * | ScalarTypeExtensionNode
+ * | ObjectTypeExtensionNode
+ * | InterfaceTypeExtensionNode
+ * | UnionTypeExtensionNode
+ * | EnumTypeExtensionNode
+ * | InputObjectTypeExtensionNode;
+ */
+interface TypeExtensionNode extends TypeSystemDefinitionNode
+{
+}

vendor/webonyx/graphql-php/src/Language/AST/TypeNode.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+/**
+ * export type TypeNode = NamedTypeNode
+ * | ListTypeNode
+ * | NonNullTypeNode
+ */
+interface TypeNode
+{
+}

vendor/webonyx/graphql-php/src/Language/AST/TypeSystemDefinitionNode.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+/**
+ * export type TypeSystemDefinitionNode =
+ * | SchemaDefinitionNode
+ * | TypeDefinitionNode
+ * | TypeExtensionNode
+ * | DirectiveDefinitionNode
+ */
+interface TypeSystemDefinitionNode extends DefinitionNode
+{
+}

vendor/webonyx/graphql-php/src/Language/AST/UnionTypeDefinitionNode.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class UnionTypeDefinitionNode extends Node implements TypeDefinitionNode
+{
+    /** @var string */
+    public $kind = NodeKind::UNION_TYPE_DEFINITION;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var DirectiveNode[] */
+    public $directives;
+
+    /** @var NamedTypeNode[]|null */
+    public $types;
+
+    /** @var StringValueNode|null */
+    public $description;
+}

vendor/webonyx/graphql-php/src/Language/AST/UnionTypeExtensionNode.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class UnionTypeExtensionNode extends Node implements TypeExtensionNode
+{
+    /** @var string */
+    public $kind = NodeKind::UNION_TYPE_EXTENSION;
+
+    /** @var NameNode */
+    public $name;
+
+    /** @var DirectiveNode[]|null */
+    public $directives;
+
+    /** @var NamedTypeNode[]|null */
+    public $types;
+}

vendor/webonyx/graphql-php/src/Language/AST/ValueNode.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+/**
+export type ValueNode = VariableNode
+| NullValueNode
+| IntValueNode
+| FloatValueNode
+| StringValueNode
+| BooleanValueNode
+| EnumValueNode
+| ListValueNode
+| ObjectValueNode
+ */
+interface ValueNode
+{
+}

vendor/webonyx/graphql-php/src/Language/AST/VariableDefinitionNode.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class VariableDefinitionNode extends Node implements DefinitionNode
+{
+    /** @var string */
+    public $kind = NodeKind::VARIABLE_DEFINITION;
+
+    /** @var VariableNode */
+    public $variable;
+
+    /** @var TypeNode */
+    public $type;
+
+    /** @var ValueNode|null */
+    public $defaultValue;
+}

vendor/webonyx/graphql-php/src/Language/AST/VariableNode.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language\AST;
+
+class VariableNode extends Node implements ValueNode
+{
+    /** @var string */
+    public $kind = NodeKind::VARIABLE;
+
+    /** @var NameNode */
+    public $name;
+}

vendor/webonyx/graphql-php/src/Language/DirectiveLocation.php

@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language;
+
+/**
+ * List of available directive locations
+ */
+class DirectiveLocation
+{
+    // Request Definitions
+    const QUERY               = 'QUERY';
+    const MUTATION            = 'MUTATION';
+    const SUBSCRIPTION        = 'SUBSCRIPTION';
+    const FIELD               = 'FIELD';
+    const FRAGMENT_DEFINITION = 'FRAGMENT_DEFINITION';
+    const FRAGMENT_SPREAD     = 'FRAGMENT_SPREAD';
+    const INLINE_FRAGMENT     = 'INLINE_FRAGMENT';
+
+    // Type System Definitions
+    const SCHEMA                 = 'SCHEMA';
+    const SCALAR                 = 'SCALAR';
+    const OBJECT                 = 'OBJECT';
+    const FIELD_DEFINITION       = 'FIELD_DEFINITION';
+    const ARGUMENT_DEFINITION    = 'ARGUMENT_DEFINITION';
+    const IFACE                  = 'INTERFACE';
+    const UNION                  = 'UNION';
+    const ENUM                   = 'ENUM';
+    const ENUM_VALUE             = 'ENUM_VALUE';
+    const INPUT_OBJECT           = 'INPUT_OBJECT';
+    const INPUT_FIELD_DEFINITION = 'INPUT_FIELD_DEFINITION';
+
+    /** @var string[] */
+    private static $locations = [
+        self::QUERY => self::QUERY,
+        self::MUTATION => self::MUTATION,
+        self::SUBSCRIPTION => self::SUBSCRIPTION,
+        self::FIELD => self::FIELD,
+        self::FRAGMENT_DEFINITION => self::FRAGMENT_DEFINITION,
+        self::FRAGMENT_SPREAD => self::FRAGMENT_SPREAD,
+        self::INLINE_FRAGMENT => self::INLINE_FRAGMENT,
+        self::SCHEMA => self::SCHEMA,
+        self::SCALAR => self::SCALAR,
+        self::OBJECT => self::OBJECT,
+        self::FIELD_DEFINITION => self::FIELD_DEFINITION,
+        self::ARGUMENT_DEFINITION => self::ARGUMENT_DEFINITION,
+        self::IFACE => self::IFACE,
+        self::UNION => self::UNION,
+        self::ENUM => self::ENUM,
+        self::ENUM_VALUE => self::ENUM_VALUE,
+        self::INPUT_OBJECT => self::INPUT_OBJECT,
+        self::INPUT_FIELD_DEFINITION => self::INPUT_FIELD_DEFINITION,
+    ];
+
+    /**
+     * @param string $name
+     *
+     * @return bool
+     */
+    public static function has($name)
+    {
+        return isset(self::$locations[$name]);
+    }
+}

vendor/webonyx/graphql-php/src/Language/Lexer.php

@@ -0,0 +1,804 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language;
+
+use GraphQL\Error\SyntaxError;
+use GraphQL\Utils\BlockString;
+use GraphQL\Utils\Utils;
+use function chr;
+use function hexdec;
+use function ord;
+use function preg_match;
+
+/**
+ * A Lexer is a stateful stream generator in that every time
+ * it is advanced, it returns the next token in the Source. Assuming the
+ * source lexes, the final Token emitted by the lexer will be of kind
+ * EOF, after which the lexer will repeatedly return the same EOF token
+ * whenever called.
+ *
+ * Algorithm is O(N) both on memory and time
+ */
+class Lexer
+{
+    private const TOKEN_BANG      = 33;
+    private const TOKEN_HASH      = 35;
+    private const TOKEN_DOLLAR    = 36;
+    private const TOKEN_AMP       = 38;
+    private const TOKEN_PAREN_L   = 40;
+    private const TOKEN_PAREN_R   = 41;
+    private const TOKEN_DOT       = 46;
+    private const TOKEN_COLON     = 58;
+    private const TOKEN_EQUALS    = 61;
+    private const TOKEN_AT        = 64;
+    private const TOKEN_BRACKET_L = 91;
+    private const TOKEN_BRACKET_R = 93;
+    private const TOKEN_BRACE_L   = 123;
+    private const TOKEN_PIPE      = 124;
+    private const TOKEN_BRACE_R   = 125;
+
+    /** @var Source */
+    public $source;
+
+    /** @var bool[] */
+    public $options;
+
+    /**
+     * The previously focused non-ignored token.
+     *
+     * @var Token
+     */
+    public $lastToken;
+
+    /**
+     * The currently focused non-ignored token.
+     *
+     * @var Token
+     */
+    public $token;
+
+    /**
+     * The (1-indexed) line containing the current token.
+     *
+     * @var int
+     */
+    public $line;
+
+    /**
+     * The character offset at which the current line begins.
+     *
+     * @var int
+     */
+    public $lineStart;
+
+    /**
+     * Current cursor position for UTF8 encoding of the source
+     *
+     * @var int
+     */
+    private $position;
+
+    /**
+     * Current cursor position for ASCII representation of the source
+     *
+     * @var int
+     */
+    private $byteStreamPosition;
+
+    /**
+     * @param bool[] $options
+     */
+    public function __construct(Source $source, array $options = [])
+    {
+        $startOfFileToken = new Token(Token::SOF, 0, 0, 0, 0, null);
+
+        $this->source    = $source;
+        $this->options   = $options;
+        $this->lastToken = $startOfFileToken;
+        $this->token     = $startOfFileToken;
+        $this->line      = 1;
+        $this->lineStart = 0;
+        $this->position  = $this->byteStreamPosition = 0;
+    }
+
+    /**
+     * @return Token
+     */
+    public function advance()
+    {
+        $this->lastToken = $this->token;
+
+        return $this->token = $this->lookahead();
+    }
+
+    public function lookahead()
+    {
+        $token = $this->token;
+        if ($token->kind !== Token::EOF) {
+            do {
+                $token = $token->next ?: ($token->next = $this->readToken($token));
+            } while ($token->kind === Token::COMMENT);
+        }
+
+        return $token;
+    }
+
+    /**
+     * @return Token
+     *
+     * @throws SyntaxError
+     */
+    private function readToken(Token $prev)
+    {
+        $bodyLength = $this->source->length;
+
+        $this->positionAfterWhitespace();
+        $position = $this->position;
+
+        $line = $this->line;
+        $col  = 1 + $position - $this->lineStart;
+
+        if ($position >= $bodyLength) {
+            return new Token(Token::EOF, $bodyLength, $bodyLength, $line, $col, $prev);
+        }
+
+        // Read next char and advance string cursor:
+        [, $code, $bytes] = $this->readChar(true);
+
+        switch ($code) {
+            case self::TOKEN_BANG:
+                return new Token(Token::BANG, $position, $position + 1, $line, $col, $prev);
+            case self::TOKEN_HASH: // #
+                $this->moveStringCursor(-1, -1 * $bytes);
+
+                return $this->readComment($line, $col, $prev);
+            case self::TOKEN_DOLLAR:
+                return new Token(Token::DOLLAR, $position, $position + 1, $line, $col, $prev);
+            case self::TOKEN_AMP:
+                return new Token(Token::AMP, $position, $position + 1, $line, $col, $prev);
+            case self::TOKEN_PAREN_L:
+                return new Token(Token::PAREN_L, $position, $position + 1, $line, $col, $prev);
+            case self::TOKEN_PAREN_R:
+                return new Token(Token::PAREN_R, $position, $position + 1, $line, $col, $prev);
+            case self::TOKEN_DOT: // .
+                [, $charCode1] = $this->readChar(true);
+                [, $charCode2] = $this->readChar(true);
+
+                if ($charCode1 === self::TOKEN_DOT && $charCode2 === self::TOKEN_DOT) {
+                    return new Token(Token::SPREAD, $position, $position + 3, $line, $col, $prev);
+                }
+                break;
+            case self::TOKEN_COLON:
+                return new Token(Token::COLON, $position, $position + 1, $line, $col, $prev);
+            case self::TOKEN_EQUALS:
+                return new Token(Token::EQUALS, $position, $position + 1, $line, $col, $prev);
+            case self::TOKEN_AT:
+                return new Token(Token::AT, $position, $position + 1, $line, $col, $prev);
+            case self::TOKEN_BRACKET_L:
+                return new Token(Token::BRACKET_L, $position, $position + 1, $line, $col, $prev);
+            case self::TOKEN_BRACKET_R:
+                return new Token(Token::BRACKET_R, $position, $position + 1, $line, $col, $prev);
+            case self::TOKEN_BRACE_L:
+                return new Token(Token::BRACE_L, $position, $position + 1, $line, $col, $prev);
+            case self::TOKEN_PIPE:
+                return new Token(Token::PIPE, $position, $position + 1, $line, $col, $prev);
+            case self::TOKEN_BRACE_R:
+                return new Token(Token::BRACE_R, $position, $position + 1, $line, $col, $prev);
+
+            // A-Z
+            case 65:
+            case 66:
+            case 67:
+            case 68:
+            case 69:
+            case 70:
+            case 71:
+            case 72:
+            case 73:
+            case 74:
+            case 75:
+            case 76:
+            case 77:
+            case 78:
+            case 79:
+            case 80:
+            case 81:
+            case 82:
+            case 83:
+            case 84:
+            case 85:
+            case 86:
+            case 87:
+            case 88:
+            case 89:
+            case 90:
+                // _
+            case 95:
+                // a-z
+            case 97:
+            case 98:
+            case 99:
+            case 100:
+            case 101:
+            case 102:
+            case 103:
+            case 104:
+            case 105:
+            case 106:
+            case 107:
+            case 108:
+            case 109:
+            case 110:
+            case 111:
+            case 112:
+            case 113:
+            case 114:
+            case 115:
+            case 116:
+            case 117:
+            case 118:
+            case 119:
+            case 120:
+            case 121:
+            case 122:
+                return $this->moveStringCursor(-1, -1 * $bytes)
+                    ->readName($line, $col, $prev);
+
+            // -
+            case 45:
+                // 0-9
+            case 48:
+            case 49:
+            case 50:
+            case 51:
+            case 52:
+            case 53:
+            case 54:
+            case 55:
+            case 56:
+            case 57:
+                return $this->moveStringCursor(-1, -1 * $bytes)
+                    ->readNumber($line, $col, $prev);
+
+            // "
+            case 34:
+                [, $nextCode]     = $this->readChar();
+                [, $nextNextCode] = $this->moveStringCursor(1, 1)->readChar();
+
+                if ($nextCode === 34 && $nextNextCode === 34) {
+                    return $this->moveStringCursor(-2, (-1 * $bytes) - 1)
+                        ->readBlockString($line, $col, $prev);
+                }
+
+                return $this->moveStringCursor(-2, (-1 * $bytes) - 1)
+                    ->readString($line, $col, $prev);
+        }
+
+        throw new SyntaxError(
+            $this->source,
+            $position,
+            $this->unexpectedCharacterMessage($code)
+        );
+    }
+
+    private function unexpectedCharacterMessage($code)
+    {
+        // SourceCharacter
+        if ($code < 0x0020 && $code !== 0x0009 && $code !== 0x000A && $code !== 0x000D) {
+            return 'Cannot contain the invalid character ' . Utils::printCharCode($code);
+        }
+
+        if ($code === 39) {
+            return "Unexpected single quote character ('), did you mean to use " .
+                'a double quote (")?';
+        }
+
+        return 'Cannot parse the unexpected character ' . Utils::printCharCode($code) . '.';
+    }
+
+    /**
+     * Reads an alphanumeric + underscore name from the source.
+     *
+     * [_A-Za-z][_0-9A-Za-z]*
+     *
+     * @param int $line
+     * @param int $col
+     *
+     * @return Token
+     */
+    private function readName($line, $col, Token $prev)
+    {
+        $value         = '';
+        $start         = $this->position;
+        [$char, $code] = $this->readChar();
+
+        while ($code && (
+                $code === 95 || // _
+                $code >= 48 && $code <= 57 || // 0-9
+                $code >= 65 && $code <= 90 || // A-Z
+                $code >= 97 && $code <= 122 // a-z
+            )) {
+            $value        .= $char;
+            [$char, $code] = $this->moveStringCursor(1, 1)->readChar();
+        }
+
+        return new Token(
+            Token::NAME,
+            $start,
+            $this->position,
+            $line,
+            $col,
+            $prev,
+            $value
+        );
+    }
+
+    /**
+     * Reads a number token from the source file, either a float
+     * or an int depending on whether a decimal point appears.
+     *
+     * Int:   -?(0|[1-9][0-9]*)
+     * Float: -?(0|[1-9][0-9]*)(\.[0-9]+)?((E|e)(+|-)?[0-9]+)?
+     *
+     * @param int $line
+     * @param int $col
+     *
+     * @return Token
+     *
+     * @throws SyntaxError
+     */
+    private function readNumber($line, $col, Token $prev)
+    {
+        $value         = '';
+        $start         = $this->position;
+        [$char, $code] = $this->readChar();
+
+        $isFloat = false;
+
+        if ($code === 45) { // -
+            $value        .= $char;
+            [$char, $code] = $this->moveStringCursor(1, 1)->readChar();
+        }
+
+        // guard against leading zero's
+        if ($code === 48) { // 0
+            $value        .= $char;
+            [$char, $code] = $this->moveStringCursor(1, 1)->readChar();
+
+            if ($code >= 48 && $code <= 57) {
+                throw new SyntaxError(
+                    $this->source,
+                    $this->position,
+                    'Invalid number, unexpected digit after 0: ' . Utils::printCharCode($code)
+                );
+            }
+        } else {
+            $value        .= $this->readDigits();
+            [$char, $code] = $this->readChar();
+        }
+
+        if ($code === 46) { // .
+            $isFloat = true;
+            $this->moveStringCursor(1, 1);
+
+            $value        .= $char;
+            $value        .= $this->readDigits();
+            [$char, $code] = $this->readChar();
+        }
+
+        if ($code === 69 || $code === 101) { // E e
+            $isFloat       = true;
+            $value        .= $char;
+            [$char, $code] = $this->moveStringCursor(1, 1)->readChar();
+
+            if ($code === 43 || $code === 45) { // + -
+                $value .= $char;
+                $this->moveStringCursor(1, 1);
+            }
+            $value .= $this->readDigits();
+        }
+
+        return new Token(
+            $isFloat ? Token::FLOAT : Token::INT,
+            $start,
+            $this->position,
+            $line,
+            $col,
+            $prev,
+            $value
+        );
+    }
+
+    /**
+     * Returns string with all digits + changes current string cursor position to point to the first char after digits
+     */
+    private function readDigits()
+    {
+        [$char, $code] = $this->readChar();
+
+        if ($code >= 48 && $code <= 57) { // 0 - 9
+            $value = '';
+
+            do {
+                $value        .= $char;
+                [$char, $code] = $this->moveStringCursor(1, 1)->readChar();
+            } while ($code >= 48 && $code <= 57); // 0 - 9
+
+            return $value;
+        }
+
+        if ($this->position > $this->source->length - 1) {
+            $code = null;
+        }
+
+        throw new SyntaxError(
+            $this->source,
+            $this->position,
+            'Invalid number, expected digit but got: ' . Utils::printCharCode($code)
+        );
+    }
+
+    /**
+     * @param int $line
+     * @param int $col
+     *
+     * @return Token
+     *
+     * @throws SyntaxError
+     */
+    private function readString($line, $col, Token $prev)
+    {
+        $start = $this->position;
+
+        // Skip leading quote and read first string char:
+        [$char, $code, $bytes] = $this->moveStringCursor(1, 1)->readChar();
+
+        $chunk = '';
+        $value = '';
+
+        while ($code !== null &&
+            // not LineTerminator
+            $code !== 10 && $code !== 13
+        ) {
+            // Closing Quote (")
+            if ($code === 34) {
+                $value .= $chunk;
+
+                // Skip quote
+                $this->moveStringCursor(1, 1);
+
+                return new Token(
+                    Token::STRING,
+                    $start,
+                    $this->position,
+                    $line,
+                    $col,
+                    $prev,
+                    $value
+                );
+            }
+
+            $this->assertValidStringCharacterCode($code, $this->position);
+            $this->moveStringCursor(1, $bytes);
+
+            if ($code === 92) { // \
+                $value   .= $chunk;
+                [, $code] = $this->readChar(true);
+
+                switch ($code) {
+                    case 34:
+                        $value .= '"';
+                        break;
+                    case 47:
+                        $value .= '/';
+                        break;
+                    case 92:
+                        $value .= '\\';
+                        break;
+                    case 98:
+                        $value .= chr(8);
+                        break; // \b (backspace)
+                    case 102:
+                        $value .= "\f";
+                        break;
+                    case 110:
+                        $value .= "\n";
+                        break;
+                    case 114:
+                        $value .= "\r";
+                        break;
+                    case 116:
+                        $value .= "\t";
+                        break;
+                    case 117:
+                        $position = $this->position;
+                        [$hex]    = $this->readChars(4, true);
+                        if (! preg_match('/[0-9a-fA-F]{4}/', $hex)) {
+                            throw new SyntaxError(
+                                $this->source,
+                                $position - 1,
+                                'Invalid character escape sequence: \\u' . $hex
+                            );
+                        }
+                        $code = hexdec($hex);
+                        $this->assertValidStringCharacterCode($code, $position - 2);
+                        $value .= Utils::chr($code);
+                        break;
+                    default:
+                        throw new SyntaxError(
+                            $this->source,
+                            $this->position - 1,
+                            'Invalid character escape sequence: \\' . Utils::chr($code)
+                        );
+                }
+                $chunk = '';
+            } else {
+                $chunk .= $char;
+            }
+
+            [$char, $code, $bytes] = $this->readChar();
+        }
+
+        throw new SyntaxError(
+            $this->source,
+            $this->position,
+            'Unterminated string.'
+        );
+    }
+
+    /**
+     * Reads a block string token from the source file.
+     *
+     * """("?"?(\\"""|\\(?!=""")|[^"\\]))*"""
+     */
+    private function readBlockString($line, $col, Token $prev)
+    {
+        $start = $this->position;
+
+        // Skip leading quotes and read first string char:
+        [$char, $code, $bytes] = $this->moveStringCursor(3, 3)->readChar();
+
+        $chunk = '';
+        $value = '';
+
+        while ($code !== null) {
+            // Closing Triple-Quote (""")
+            if ($code === 34) {
+                // Move 2 quotes
+                [, $nextCode]     = $this->moveStringCursor(1, 1)->readChar();
+                [, $nextNextCode] = $this->moveStringCursor(1, 1)->readChar();
+
+                if ($nextCode === 34 && $nextNextCode === 34) {
+                    $value .= $chunk;
+
+                    $this->moveStringCursor(1, 1);
+
+                    return new Token(
+                        Token::BLOCK_STRING,
+                        $start,
+                        $this->position,
+                        $line,
+                        $col,
+                        $prev,
+                        BlockString::value($value)
+                    );
+                }
+
+                // move cursor back to before the first quote
+                $this->moveStringCursor(-2, -2);
+            }
+
+            $this->assertValidBlockStringCharacterCode($code, $this->position);
+            $this->moveStringCursor(1, $bytes);
+
+            [, $nextCode]         = $this->readChar();
+            [, $nextNextCode]     = $this->moveStringCursor(1, 1)->readChar();
+            [, $nextNextNextCode] = $this->moveStringCursor(1, 1)->readChar();
+
+            // Escape Triple-Quote (\""")
+            if ($code === 92 &&
+                $nextCode === 34 &&
+                $nextNextCode === 34 &&
+                $nextNextNextCode === 34
+            ) {
+                $this->moveStringCursor(1, 1);
+                $value .= $chunk . '"""';
+                $chunk  = '';
+            } else {
+                $this->moveStringCursor(-2, -2);
+                $chunk .= $char;
+            }
+
+            [$char, $code, $bytes] = $this->readChar();
+        }
+
+        throw new SyntaxError(
+            $this->source,
+            $this->position,
+            'Unterminated string.'
+        );
+    }
+
+    private function assertValidStringCharacterCode($code, $position)
+    {
+        // SourceCharacter
+        if ($code < 0x0020 && $code !== 0x0009) {
+            throw new SyntaxError(
+                $this->source,
+                $position,
+                'Invalid character within String: ' . Utils::printCharCode($code)
+            );
+        }
+    }
+
+    private function assertValidBlockStringCharacterCode($code, $position)
+    {
+        // SourceCharacter
+        if ($code < 0x0020 && $code !== 0x0009 && $code !== 0x000A && $code !== 0x000D) {
+            throw new SyntaxError(
+                $this->source,
+                $position,
+                'Invalid character within String: ' . Utils::printCharCode($code)
+            );
+        }
+    }
+
+    /**
+     * Reads from body starting at startPosition until it finds a non-whitespace
+     * or commented character, then places cursor to the position of that character.
+     */
+    private function positionAfterWhitespace()
+    {
+        while ($this->position < $this->source->length) {
+            [, $code, $bytes] = $this->readChar();
+
+            // Skip whitespace
+            // tab | space | comma | BOM
+            if ($code === 9 || $code === 32 || $code === 44 || $code === 0xFEFF) {
+                $this->moveStringCursor(1, $bytes);
+            } elseif ($code === 10) { // new line
+                $this->moveStringCursor(1, $bytes);
+                $this->line++;
+                $this->lineStart = $this->position;
+            } elseif ($code === 13) { // carriage return
+                [, $nextCode, $nextBytes] = $this->moveStringCursor(1, $bytes)->readChar();
+
+                if ($nextCode === 10) { // lf after cr
+                    $this->moveStringCursor(1, $nextBytes);
+                }
+                $this->line++;
+                $this->lineStart = $this->position;
+            } else {
+                break;
+            }
+        }
+    }
+
+    /**
+     * Reads a comment token from the source file.
+     *
+     * #[\u0009\u0020-\uFFFF]*
+     *
+     * @param int $line
+     * @param int $col
+     *
+     * @return Token
+     */
+    private function readComment($line, $col, Token $prev)
+    {
+        $start = $this->position;
+        $value = '';
+        $bytes = 1;
+
+        do {
+            [$char, $code, $bytes] = $this->moveStringCursor(1, $bytes)->readChar();
+            $value                .= $char;
+        } while ($code &&
+        // SourceCharacter but not LineTerminator
+        ($code > 0x001F || $code === 0x0009)
+        );
+
+        return new Token(
+            Token::COMMENT,
+            $start,
+            $this->position,
+            $line,
+            $col,
+            $prev,
+            $value
+        );
+    }
+
+    /**
+     * Reads next UTF8Character from the byte stream, starting from $byteStreamPosition.
+     *
+     * @param bool $advance
+     * @param int  $byteStreamPosition
+     *
+     * @return (string|int)[]
+     */
+    private function readChar($advance = false, $byteStreamPosition = null)
+    {
+        if ($byteStreamPosition === null) {
+            $byteStreamPosition = $this->byteStreamPosition;
+        }
+
+        $code           = null;
+        $utf8char       = '';
+        $bytes          = 0;
+        $positionOffset = 0;
+
+        if (isset($this->source->body[$byteStreamPosition])) {
+            $ord = ord($this->source->body[$byteStreamPosition]);
+
+            if ($ord < 128) {
+                $bytes = 1;
+            } elseif ($ord < 224) {
+                $bytes = 2;
+            } elseif ($ord < 240) {
+                $bytes = 3;
+            } else {
+                $bytes = 4;
+            }
+
+            $utf8char = '';
+            for ($pos = $byteStreamPosition; $pos < $byteStreamPosition + $bytes; $pos++) {
+                $utf8char .= $this->source->body[$pos];
+            }
+            $positionOffset = 1;
+            $code           = $bytes === 1 ? $ord : Utils::ord($utf8char);
+        }
+
+        if ($advance) {
+            $this->moveStringCursor($positionOffset, $bytes);
+        }
+
+        return [$utf8char, $code, $bytes];
+    }
+
+    /**
+     * Reads next $numberOfChars UTF8 characters from the byte stream, starting from $byteStreamPosition.
+     *
+     * @param int  $charCount
+     * @param bool $advance
+     * @param null $byteStreamPosition
+     *
+     * @return (string|int)[]
+     */
+    private function readChars($charCount, $advance = false, $byteStreamPosition = null)
+    {
+        $result     = '';
+        $totalBytes = 0;
+        $byteOffset = $byteStreamPosition ?: $this->byteStreamPosition;
+
+        for ($i = 0; $i < $charCount; $i++) {
+            [$char, $code, $bytes] = $this->readChar(false, $byteOffset);
+            $totalBytes           += $bytes;
+            $byteOffset           += $bytes;
+            $result               .= $char;
+        }
+        if ($advance) {
+            $this->moveStringCursor($charCount, $totalBytes);
+        }
+
+        return [$result, $totalBytes];
+    }
+
+    /**
+     * Moves internal string cursor position
+     *
+     * @param int $positionOffset
+     * @param int $byteStreamOffset
+     *
+     * @return self
+     */
+    private function moveStringCursor($positionOffset, $byteStreamOffset)
+    {
+        $this->position           += $positionOffset;
+        $this->byteStreamPosition += $byteStreamOffset;
+
+        return $this;
+    }
+}

vendor/webonyx/graphql-php/src/Language/Printer.php

@@ -0,0 +1,520 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language;
+
+use GraphQL\Language\AST\ArgumentNode;
+use GraphQL\Language\AST\BooleanValueNode;
+use GraphQL\Language\AST\DirectiveDefinitionNode;
+use GraphQL\Language\AST\DirectiveNode;
+use GraphQL\Language\AST\DocumentNode;
+use GraphQL\Language\AST\EnumTypeDefinitionNode;
+use GraphQL\Language\AST\EnumTypeExtensionNode;
+use GraphQL\Language\AST\EnumValueDefinitionNode;
+use GraphQL\Language\AST\EnumValueNode;
+use GraphQL\Language\AST\FieldDefinitionNode;
+use GraphQL\Language\AST\FieldNode;
+use GraphQL\Language\AST\FloatValueNode;
+use GraphQL\Language\AST\FragmentDefinitionNode;
+use GraphQL\Language\AST\FragmentSpreadNode;
+use GraphQL\Language\AST\InlineFragmentNode;
+use GraphQL\Language\AST\InputObjectTypeDefinitionNode;
+use GraphQL\Language\AST\InputObjectTypeExtensionNode;
+use GraphQL\Language\AST\InputValueDefinitionNode;
+use GraphQL\Language\AST\InterfaceTypeDefinitionNode;
+use GraphQL\Language\AST\InterfaceTypeExtensionNode;
+use GraphQL\Language\AST\IntValueNode;
+use GraphQL\Language\AST\ListTypeNode;
+use GraphQL\Language\AST\ListValueNode;
+use GraphQL\Language\AST\NamedTypeNode;
+use GraphQL\Language\AST\Node;
+use GraphQL\Language\AST\NodeKind;
+use GraphQL\Language\AST\NonNullTypeNode;
+use GraphQL\Language\AST\NullValueNode;
+use GraphQL\Language\AST\ObjectFieldNode;
+use GraphQL\Language\AST\ObjectTypeDefinitionNode;
+use GraphQL\Language\AST\ObjectTypeExtensionNode;
+use GraphQL\Language\AST\ObjectValueNode;
+use GraphQL\Language\AST\OperationDefinitionNode;
+use GraphQL\Language\AST\OperationTypeDefinitionNode;
+use GraphQL\Language\AST\ScalarTypeDefinitionNode;
+use GraphQL\Language\AST\ScalarTypeExtensionNode;
+use GraphQL\Language\AST\SchemaDefinitionNode;
+use GraphQL\Language\AST\SchemaTypeExtensionNode;
+use GraphQL\Language\AST\SelectionSetNode;
+use GraphQL\Language\AST\StringValueNode;
+use GraphQL\Language\AST\UnionTypeDefinitionNode;
+use GraphQL\Language\AST\UnionTypeExtensionNode;
+use GraphQL\Language\AST\VariableDefinitionNode;
+use GraphQL\Utils\Utils;
+use function count;
+use function implode;
+use function json_encode;
+use function preg_replace;
+use function sprintf;
+use function str_replace;
+use function strpos;
+
+/**
+ * Prints AST to string. Capable of printing GraphQL queries and Type definition language.
+ * Useful for pretty-printing queries or printing back AST for logging, documentation, etc.
+ *
+ * Usage example:
+ *
+ * ```php
+ * $query = 'query myQuery {someField}';
+ * $ast = GraphQL\Language\Parser::parse($query);
+ * $printed = GraphQL\Language\Printer::doPrint($ast);
+ * ```
+ */
+class Printer
+{
+    /**
+     * Prints AST to string. Capable of printing GraphQL queries and Type definition language.
+     *
+     * @param Node $ast
+     *
+     * @return string
+     *
+     * @api
+     */
+    public static function doPrint($ast)
+    {
+        static $instance;
+        $instance = $instance ?: new static();
+
+        return $instance->printAST($ast);
+    }
+
+    protected function __construct()
+    {
+    }
+
+    public function printAST($ast)
+    {
+        return Visitor::visit(
+            $ast,
+            [
+                'leave' => [
+                    NodeKind::NAME => static function (Node $node) {
+                        return '' . $node->value;
+                    },
+
+                    NodeKind::VARIABLE => static function ($node) {
+                        return '$' . $node->name;
+                    },
+
+                    NodeKind::DOCUMENT => function (DocumentNode $node) {
+                        return $this->join($node->definitions, "\n\n") . "\n";
+                    },
+
+                    NodeKind::OPERATION_DEFINITION => function (OperationDefinitionNode $node) {
+                        $op           = $node->operation;
+                        $name         = $node->name;
+                        $varDefs      = $this->wrap('(', $this->join($node->variableDefinitions, ', '), ')');
+                        $directives   = $this->join($node->directives, ' ');
+                        $selectionSet = $node->selectionSet;
+
+                        // Anonymous queries with no directives or variable definitions can use
+                        // the query short form.
+                        return ! $name && ! $directives && ! $varDefs && $op === 'query'
+                            ? $selectionSet
+                            : $this->join([$op, $this->join([$name, $varDefs]), $directives, $selectionSet], ' ');
+                    },
+
+                    NodeKind::VARIABLE_DEFINITION => function (VariableDefinitionNode $node) {
+                        return $node->variable . ': ' . $node->type . $this->wrap(' = ', $node->defaultValue);
+                    },
+
+                    NodeKind::SELECTION_SET => function (SelectionSetNode $node) {
+                        return $this->block($node->selections);
+                    },
+
+                    NodeKind::FIELD => function (FieldNode $node) {
+                        return $this->join(
+                            [
+                                $this->wrap('', $node->alias, ': ') . $node->name . $this->wrap(
+                                    '(',
+                                    $this->join($node->arguments, ', '),
+                                    ')'
+                                ),
+                                $this->join($node->directives, ' '),
+                                $node->selectionSet,
+                            ],
+                            ' '
+                        );
+                    },
+
+                    NodeKind::ARGUMENT => static function (ArgumentNode $node) {
+                        return $node->name . ': ' . $node->value;
+                    },
+
+                    NodeKind::FRAGMENT_SPREAD => function (FragmentSpreadNode $node) {
+                        return '...' . $node->name . $this->wrap(' ', $this->join($node->directives, ' '));
+                    },
+
+                    NodeKind::INLINE_FRAGMENT => function (InlineFragmentNode $node) {
+                        return $this->join(
+                            [
+                                '...',
+                                $this->wrap('on ', $node->typeCondition),
+                                $this->join($node->directives, ' '),
+                                $node->selectionSet,
+                            ],
+                            ' '
+                        );
+                    },
+
+                    NodeKind::FRAGMENT_DEFINITION => function (FragmentDefinitionNode $node) {
+                        // Note: fragment variable definitions are experimental and may be changed or removed in the future.
+                        return sprintf('fragment %s', $node->name)
+                            . $this->wrap('(', $this->join($node->variableDefinitions, ', '), ')')
+                            . sprintf(' on %s ', $node->typeCondition)
+                            . $this->wrap('', $this->join($node->directives, ' '), ' ')
+                            . $node->selectionSet;
+                    },
+
+                    NodeKind::INT => static function (IntValueNode $node) {
+                        return $node->value;
+                    },
+
+                    NodeKind::FLOAT => static function (FloatValueNode $node) {
+                        return $node->value;
+                    },
+
+                    NodeKind::STRING => function (StringValueNode $node, $key) {
+                        if ($node->block) {
+                            return $this->printBlockString($node->value, $key === 'description');
+                        }
+
+                        return json_encode($node->value);
+                    },
+
+                    NodeKind::BOOLEAN => static function (BooleanValueNode $node) {
+                        return $node->value ? 'true' : 'false';
+                    },
+
+                    NodeKind::NULL => static function (NullValueNode $node) {
+                        return 'null';
+                    },
+
+                    NodeKind::ENUM => static function (EnumValueNode $node) {
+                        return $node->value;
+                    },
+
+                    NodeKind::LST => function (ListValueNode $node) {
+                        return '[' . $this->join($node->values, ', ') . ']';
+                    },
+
+                    NodeKind::OBJECT => function (ObjectValueNode $node) {
+                        return '{' . $this->join($node->fields, ', ') . '}';
+                    },
+
+                    NodeKind::OBJECT_FIELD => static function (ObjectFieldNode $node) {
+                        return $node->name . ': ' . $node->value;
+                    },
+
+                    NodeKind::DIRECTIVE => function (DirectiveNode $node) {
+                        return '@' . $node->name . $this->wrap('(', $this->join($node->arguments, ', '), ')');
+                    },
+
+                    NodeKind::NAMED_TYPE => static function (NamedTypeNode $node) {
+                        return $node->name;
+                    },
+
+                    NodeKind::LIST_TYPE => static function (ListTypeNode $node) {
+                        return '[' . $node->type . ']';
+                    },
+
+                    NodeKind::NON_NULL_TYPE => static function (NonNullTypeNode $node) {
+                        return $node->type . '!';
+                    },
+
+                    NodeKind::SCHEMA_DEFINITION => function (SchemaDefinitionNode $def) {
+                        return $this->join(
+                            [
+                                'schema',
+                                $this->join($def->directives, ' '),
+                                $this->block($def->operationTypes),
+                            ],
+                            ' '
+                        );
+                    },
+
+                    NodeKind::OPERATION_TYPE_DEFINITION => static function (OperationTypeDefinitionNode $def) {
+                        return $def->operation . ': ' . $def->type;
+                    },
+
+                    NodeKind::SCALAR_TYPE_DEFINITION => $this->addDescription(function (ScalarTypeDefinitionNode $def) {
+                        return $this->join(['scalar', $def->name, $this->join($def->directives, ' ')], ' ');
+                    }),
+
+                    NodeKind::OBJECT_TYPE_DEFINITION => $this->addDescription(function (ObjectTypeDefinitionNode $def) {
+                        return $this->join(
+                            [
+                                'type',
+                                $def->name,
+                                $this->wrap('implements ', $this->join($def->interfaces, ' & ')),
+                                $this->join($def->directives, ' '),
+                                $this->block($def->fields),
+                            ],
+                            ' '
+                        );
+                    }),
+
+                    NodeKind::FIELD_DEFINITION => $this->addDescription(function (FieldDefinitionNode $def) {
+                        $noIndent = Utils::every($def->arguments, static function (string $arg) {
+                            return strpos($arg, "\n") === false;
+                        });
+
+                        return $def->name
+                            . ($noIndent
+                                ? $this->wrap('(', $this->join($def->arguments, ', '), ')')
+                                : $this->wrap("(\n", $this->indent($this->join($def->arguments, "\n")), "\n)"))
+                            . ': ' . $def->type
+                            . $this->wrap(' ', $this->join($def->directives, ' '));
+                    }),
+
+                    NodeKind::INPUT_VALUE_DEFINITION => $this->addDescription(function (InputValueDefinitionNode $def) {
+                        return $this->join(
+                            [
+                                $def->name . ': ' . $def->type,
+                                $this->wrap('= ', $def->defaultValue),
+                                $this->join($def->directives, ' '),
+                            ],
+                            ' '
+                        );
+                    }),
+
+                    NodeKind::INTERFACE_TYPE_DEFINITION => $this->addDescription(
+                        function (InterfaceTypeDefinitionNode $def) {
+                            return $this->join(
+                                [
+                                    'interface',
+                                    $def->name,
+                                    $this->join($def->directives, ' '),
+                                    $this->block($def->fields),
+                                ],
+                                ' '
+                            );
+                        }
+                    ),
+
+                    NodeKind::UNION_TYPE_DEFINITION => $this->addDescription(function (UnionTypeDefinitionNode $def) {
+                        return $this->join(
+                            [
+                                'union',
+                                $def->name,
+                                $this->join($def->directives, ' '),
+                                $def->types
+                                    ? '= ' . $this->join($def->types, ' | ')
+                                    : '',
+                            ],
+                            ' '
+                        );
+                    }),
+
+                    NodeKind::ENUM_TYPE_DEFINITION => $this->addDescription(function (EnumTypeDefinitionNode $def) {
+                        return $this->join(
+                            [
+                                'enum',
+                                $def->name,
+                                $this->join($def->directives, ' '),
+                                $this->block($def->values),
+                            ],
+                            ' '
+                        );
+                    }),
+
+                    NodeKind::ENUM_VALUE_DEFINITION => $this->addDescription(function (EnumValueDefinitionNode $def) {
+                        return $this->join([$def->name, $this->join($def->directives, ' ')], ' ');
+                    }),
+
+                    NodeKind::INPUT_OBJECT_TYPE_DEFINITION => $this->addDescription(function (
+                        InputObjectTypeDefinitionNode $def
+                    ) {
+                        return $this->join(
+                            [
+                                'input',
+                                $def->name,
+                                $this->join($def->directives, ' '),
+                                $this->block($def->fields),
+                            ],
+                            ' '
+                        );
+                    }),
+
+                    NodeKind::SCHEMA_EXTENSION => function (SchemaTypeExtensionNode $def) {
+                        return $this->join(
+                            [
+                                'extend schema',
+                                $this->join($def->directives, ' '),
+                                $this->block($def->operationTypes),
+                            ],
+                            ' '
+                        );
+                    },
+
+                    NodeKind::SCALAR_TYPE_EXTENSION => function (ScalarTypeExtensionNode $def) {
+                        return $this->join(
+                            [
+                                'extend scalar',
+                                $def->name,
+                                $this->join($def->directives, ' '),
+                            ],
+                            ' '
+                        );
+                    },
+
+                    NodeKind::OBJECT_TYPE_EXTENSION => function (ObjectTypeExtensionNode $def) {
+                        return $this->join(
+                            [
+                                'extend type',
+                                $def->name,
+                                $this->wrap('implements ', $this->join($def->interfaces, ' & ')),
+                                $this->join($def->directives, ' '),
+                                $this->block($def->fields),
+                            ],
+                            ' '
+                        );
+                    },
+
+                    NodeKind::INTERFACE_TYPE_EXTENSION => function (InterfaceTypeExtensionNode $def) {
+                        return $this->join(
+                            [
+                                'extend interface',
+                                $def->name,
+                                $this->join($def->directives, ' '),
+                                $this->block($def->fields),
+                            ],
+                            ' '
+                        );
+                    },
+
+                    NodeKind::UNION_TYPE_EXTENSION => function (UnionTypeExtensionNode $def) {
+                        return $this->join(
+                            [
+                                'extend union',
+                                $def->name,
+                                $this->join($def->directives, ' '),
+                                $def->types
+                                    ? '= ' . $this->join($def->types, ' | ')
+                                    : '',
+                            ],
+                            ' '
+                        );
+                    },
+
+                    NodeKind::ENUM_TYPE_EXTENSION => function (EnumTypeExtensionNode $def) {
+                        return $this->join(
+                            [
+                                'extend enum',
+                                $def->name,
+                                $this->join($def->directives, ' '),
+                                $this->block($def->values),
+                            ],
+                            ' '
+                        );
+                    },
+
+                    NodeKind::INPUT_OBJECT_TYPE_EXTENSION => function (InputObjectTypeExtensionNode $def) {
+                        return $this->join(
+                            [
+                                'extend input',
+                                $def->name,
+                                $this->join($def->directives, ' '),
+                                $this->block($def->fields),
+                            ],
+                            ' '
+                        );
+                    },
+
+                    NodeKind::DIRECTIVE_DEFINITION => $this->addDescription(function (DirectiveDefinitionNode $def) {
+                        $noIndent = Utils::every($def->arguments, static function (string $arg) {
+                            return strpos($arg, "\n") === false;
+                        });
+
+                        return 'directive @'
+                            . $def->name
+                            . ($noIndent
+                                ? $this->wrap('(', $this->join($def->arguments, ', '), ')')
+                                : $this->wrap("(\n", $this->indent($this->join($def->arguments, "\n")), "\n"))
+                            . ' on ' . $this->join($def->locations, ' | ');
+                    }),
+                ],
+            ]
+        );
+    }
+
+    public function addDescription(callable $cb)
+    {
+        return function ($node) use ($cb) {
+            return $this->join([$node->description, $cb($node)], "\n");
+        };
+    }
+
+    /**
+     * If maybeString is not null or empty, then wrap with start and end, otherwise
+     * print an empty string.
+     */
+    public function wrap($start, $maybeString, $end = '')
+    {
+        return $maybeString ? ($start . $maybeString . $end) : '';
+    }
+
+    /**
+     * Given array, print each item on its own line, wrapped in an
+     * indented "{ }" block.
+     */
+    public function block($array)
+    {
+        return $array && $this->length($array)
+            ? "{\n" . $this->indent($this->join($array, "\n")) . "\n}"
+            : '';
+    }
+
+    public function indent($maybeString)
+    {
+        return $maybeString ? '  ' . str_replace("\n", "\n  ", $maybeString) : '';
+    }
+
+    public function manyList($start, $list, $separator, $end)
+    {
+        return $this->length($list) === 0 ? null : ($start . $this->join($list, $separator) . $end);
+    }
+
+    public function length($maybeArray)
+    {
+        return $maybeArray ? count($maybeArray) : 0;
+    }
+
+    public function join($maybeArray, $separator = '')
+    {
+        return $maybeArray
+            ? implode(
+                $separator,
+                Utils::filter(
+                    $maybeArray,
+                    static function ($x) {
+                        return (bool) $x;
+                    }
+                )
+            )
+            : '';
+    }
+
+    /**
+     * Print a block string in the indented block form by adding a leading and
+     * trailing blank line. However, if a block string starts with whitespace and is
+     * a single-line, adding a leading blank line would strip that whitespace.
+     */
+    private function printBlockString($value, $isDescription)
+    {
+        $escaped = str_replace('"""', '\\"""', $value);
+
+        return ($value[0] === ' ' || $value[0] === "\t") && strpos($value, "\n") === false
+            ? ('"""' . preg_replace('/"$/', "\"\n", $escaped) . '"""')
+            : ('"""' . "\n" . ($isDescription ? $escaped : $this->indent($escaped)) . "\n" . '"""');
+    }
+}

vendor/webonyx/graphql-php/src/Language/Source.php

@@ -0,0 +1,85 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language;
+
+use GraphQL\Utils\Utils;
+use function is_string;
+use function json_decode;
+use function mb_strlen;
+use function mb_substr;
+use function preg_match_all;
+use const PREG_OFFSET_CAPTURE;
+
+class Source
+{
+    /** @var string */
+    public $body;
+
+    /** @var int */
+    public $length;
+
+    /** @var string */
+    public $name;
+
+    /** @var SourceLocation */
+    public $locationOffset;
+
+    /**
+     * A representation of source input to GraphQL.
+     * `name` and `locationOffset` are optional. They are useful for clients who
+     * store GraphQL documents in source files; for example, if the GraphQL input
+     * starts at line 40 in a file named Foo.graphql, it might be useful for name to
+     * be "Foo.graphql" and location to be `{ line: 40, column: 0 }`.
+     * line and column in locationOffset are 1-indexed
+     *
+     * @param string      $body
+     * @param string|null $name
+     */
+    public function __construct($body, $name = null, ?SourceLocation $location = null)
+    {
+        Utils::invariant(
+            is_string($body),
+            'GraphQL query body is expected to be string, but got ' . Utils::getVariableType($body)
+        );
+
+        $this->body           = $body;
+        $this->length         = mb_strlen($body, 'UTF-8');
+        $this->name           = $name ?: 'GraphQL request';
+        $this->locationOffset = $location ?: new SourceLocation(1, 1);
+
+        Utils::invariant(
+            $this->locationOffset->line > 0,
+            'line in locationOffset is 1-indexed and must be positive'
+        );
+        Utils::invariant(
+            $this->locationOffset->column > 0,
+            'column in locationOffset is 1-indexed and must be positive'
+        );
+    }
+
+    /**
+     * @param int $position
+     *
+     * @return SourceLocation
+     */
+    public function getLocation($position)
+    {
+        $line   = 1;
+        $column = $position + 1;
+
+        $utfChars   = json_decode('"\u2028\u2029"');
+        $lineRegexp = '/\r\n|[\n\r' . $utfChars . ']/su';
+        $matches    = [];
+        preg_match_all($lineRegexp, mb_substr($this->body, 0, $position, 'UTF-8'), $matches, PREG_OFFSET_CAPTURE);
+
+        foreach ($matches[0] as $index => $match) {
+            $line += 1;
+
+            $column = $position + 1 - ($match[1] + mb_strlen($match[0], 'UTF-8'));
+        }
+
+        return new SourceLocation($line, $column);
+    }
+}

vendor/webonyx/graphql-php/src/Language/SourceLocation.php

@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language;
+
+use JsonSerializable;
+
+class SourceLocation implements JsonSerializable
+{
+    /** @var int */
+    public $line;
+
+    /** @var int */
+    public $column;
+
+    /**
+     * @param int $line
+     * @param int $col
+     */
+    public function __construct($line, $col)
+    {
+        $this->line   = $line;
+        $this->column = $col;
+    }
+
+    /**
+     * @return int[]
+     */
+    public function toArray()
+    {
+        return [
+            'line'   => $this->line,
+            'column' => $this->column,
+        ];
+    }
+
+    /**
+     * @return int[]
+     */
+    public function toSerializableArray()
+    {
+        return $this->toArray();
+    }
+
+    /**
+     * @return int[]
+     */
+    public function jsonSerialize()
+    {
+        return $this->toSerializableArray();
+    }
+}

vendor/webonyx/graphql-php/src/Language/Token.php

@@ -0,0 +1,127 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language;
+
+/**
+ * Represents a range of characters represented by a lexical token
+ * within a Source.
+ */
+class Token
+{
+    // Each kind of token.
+    const SOF          = '<SOF>';
+    const EOF          = '<EOF>';
+    const BANG         = '!';
+    const DOLLAR       = '$';
+    const AMP          = '&';
+    const PAREN_L      = '(';
+    const PAREN_R      = ')';
+    const SPREAD       = '...';
+    const COLON        = ':';
+    const EQUALS       = '=';
+    const AT           = '@';
+    const BRACKET_L    = '[';
+    const BRACKET_R    = ']';
+    const BRACE_L      = '{';
+    const PIPE         = '|';
+    const BRACE_R      = '}';
+    const NAME         = 'Name';
+    const INT          = 'Int';
+    const FLOAT        = 'Float';
+    const STRING       = 'String';
+    const BLOCK_STRING = 'BlockString';
+    const COMMENT      = 'Comment';
+
+    /**
+     * The kind of Token (see one of constants above).
+     *
+     * @var string
+     */
+    public $kind;
+
+    /**
+     * The character offset at which this Node begins.
+     *
+     * @var int
+     */
+    public $start;
+
+    /**
+     * The character offset at which this Node ends.
+     *
+     * @var int
+     */
+    public $end;
+
+    /**
+     * The 1-indexed line number on which this Token appears.
+     *
+     * @var int
+     */
+    public $line;
+
+    /**
+     * The 1-indexed column number at which this Token begins.
+     *
+     * @var int
+     */
+    public $column;
+
+    /** @var string|null */
+    public $value;
+
+    /**
+     * Tokens exist as nodes in a double-linked-list amongst all tokens
+     * including ignored tokens. <SOF> is always the first node and <EOF>
+     * the last.
+     *
+     * @var Token
+     */
+    public $prev;
+
+    /** @var Token */
+    public $next;
+
+    /**
+     * @param string     $kind
+     * @param int        $start
+     * @param int        $end
+     * @param int        $line
+     * @param int        $column
+     * @param mixed|null $value
+     */
+    public function __construct($kind, $start, $end, $line, $column, ?Token $previous = null, $value = null)
+    {
+        $this->kind   = $kind;
+        $this->start  = $start;
+        $this->end    = $end;
+        $this->line   = $line;
+        $this->column = $column;
+        $this->prev   = $previous;
+        $this->next   = null;
+        $this->value  = $value;
+    }
+
+    /**
+     * @return string
+     */
+    public function getDescription()
+    {
+        return $this->kind . ($this->value ? ' "' . $this->value . '"' : '');
+    }
+
+    /**
+     * @return (string|int|null)[]
+     */
+    public function toArray()
+    {
+        return [
+            'kind'   => $this->kind,
+            'value'  => $this->value,
+            'line'   => $this->line,
+            'column' => $this->column,
+        ];
+    }
+}

vendor/webonyx/graphql-php/src/Language/Visitor.php

@@ -0,0 +1,543 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language;
+
+use ArrayObject;
+use Exception;
+use GraphQL\Language\AST\Node;
+use GraphQL\Language\AST\NodeKind;
+use GraphQL\Language\AST\NodeList;
+use GraphQL\Utils\TypeInfo;
+use SplFixedArray;
+use stdClass;
+use function array_pop;
+use function array_splice;
+use function call_user_func;
+use function call_user_func_array;
+use function count;
+use function func_get_args;
+use function is_array;
+use function is_callable;
+use function json_encode;
+
+/**
+ * Utility for efficient AST traversal and modification.
+ *
+ * `visit()` will walk through an AST using a depth first traversal, calling
+ * the visitor's enter function at each node in the traversal, and calling the
+ * leave function after visiting that node and all of it's child nodes.
+ *
+ * By returning different values from the enter and leave functions, the
+ * behavior of the visitor can be altered, including skipping over a sub-tree of
+ * the AST (by returning false), editing the AST by returning a value or null
+ * to remove the value, or to stop the whole traversal by returning BREAK.
+ *
+ * When using `visit()` to edit an AST, the original AST will not be modified, and
+ * a new version of the AST with the changes applied will be returned from the
+ * visit function.
+ *
+ *     $editedAST = Visitor::visit($ast, [
+ *       'enter' => function ($node, $key, $parent, $path, $ancestors) {
+ *         // return
+ *         //   null: no action
+ *         //   Visitor::skipNode(): skip visiting this node
+ *         //   Visitor::stop(): stop visiting altogether
+ *         //   Visitor::removeNode(): delete this node
+ *         //   any value: replace this node with the returned value
+ *       },
+ *       'leave' => function ($node, $key, $parent, $path, $ancestors) {
+ *         // return
+ *         //   null: no action
+ *         //   Visitor::stop(): stop visiting altogether
+ *         //   Visitor::removeNode(): delete this node
+ *         //   any value: replace this node with the returned value
+ *       }
+ *     ]);
+ *
+ * Alternatively to providing enter() and leave() functions, a visitor can
+ * instead provide functions named the same as the [kinds of AST nodes](reference.md#graphqllanguageastnodekind),
+ * or enter/leave visitors at a named key, leading to four permutations of
+ * visitor API:
+ *
+ * 1) Named visitors triggered when entering a node a specific kind.
+ *
+ *     Visitor::visit($ast, [
+ *       'Kind' => function ($node) {
+ *         // enter the "Kind" node
+ *       }
+ *     ]);
+ *
+ * 2) Named visitors that trigger upon entering and leaving a node of
+ *    a specific kind.
+ *
+ *     Visitor::visit($ast, [
+ *       'Kind' => [
+ *         'enter' => function ($node) {
+ *           // enter the "Kind" node
+ *         }
+ *         'leave' => function ($node) {
+ *           // leave the "Kind" node
+ *         }
+ *       ]
+ *     ]);
+ *
+ * 3) Generic visitors that trigger upon entering and leaving any node.
+ *
+ *     Visitor::visit($ast, [
+ *       'enter' => function ($node) {
+ *         // enter any node
+ *       },
+ *       'leave' => function ($node) {
+ *         // leave any node
+ *       }
+ *     ]);
+ *
+ * 4) Parallel visitors for entering and leaving nodes of a specific kind.
+ *
+ *     Visitor::visit($ast, [
+ *       'enter' => [
+ *         'Kind' => function($node) {
+ *           // enter the "Kind" node
+ *         }
+ *       },
+ *       'leave' => [
+ *         'Kind' => function ($node) {
+ *           // leave the "Kind" node
+ *         }
+ *       ]
+ *     ]);
+ */
+class Visitor
+{
+    /** @var string[][] */
+    public static $visitorKeys = [
+        NodeKind::NAME                 => [],
+        NodeKind::DOCUMENT             => ['definitions'],
+        NodeKind::OPERATION_DEFINITION => ['name', 'variableDefinitions', 'directives', 'selectionSet'],
+        NodeKind::VARIABLE_DEFINITION  => ['variable', 'type', 'defaultValue'],
+        NodeKind::VARIABLE             => ['name'],
+        NodeKind::SELECTION_SET        => ['selections'],
+        NodeKind::FIELD                => ['alias', 'name', 'arguments', 'directives', 'selectionSet'],
+        NodeKind::ARGUMENT             => ['name', 'value'],
+        NodeKind::FRAGMENT_SPREAD      => ['name', 'directives'],
+        NodeKind::INLINE_FRAGMENT      => ['typeCondition', 'directives', 'selectionSet'],
+        NodeKind::FRAGMENT_DEFINITION  => [
+            'name',
+            // Note: fragment variable definitions are experimental and may be changed
+            // or removed in the future.
+            'variableDefinitions',
+            'typeCondition',
+            'directives',
+            'selectionSet',
+        ],
+
+        NodeKind::INT           => [],
+        NodeKind::FLOAT         => [],
+        NodeKind::STRING        => [],
+        NodeKind::BOOLEAN       => [],
+        NodeKind::NULL          => [],
+        NodeKind::ENUM          => [],
+        NodeKind::LST           => ['values'],
+        NodeKind::OBJECT        => ['fields'],
+        NodeKind::OBJECT_FIELD  => ['name', 'value'],
+        NodeKind::DIRECTIVE     => ['name', 'arguments'],
+        NodeKind::NAMED_TYPE    => ['name'],
+        NodeKind::LIST_TYPE     => ['type'],
+        NodeKind::NON_NULL_TYPE => ['type'],
+
+        NodeKind::SCHEMA_DEFINITION            => ['directives', 'operationTypes'],
+        NodeKind::OPERATION_TYPE_DEFINITION    => ['type'],
+        NodeKind::SCALAR_TYPE_DEFINITION       => ['description', 'name', 'directives'],
+        NodeKind::OBJECT_TYPE_DEFINITION       => ['description', 'name', 'interfaces', 'directives', 'fields'],
+        NodeKind::FIELD_DEFINITION             => ['description', 'name', 'arguments', 'type', 'directives'],
+        NodeKind::INPUT_VALUE_DEFINITION       => ['description', 'name', 'type', 'defaultValue', 'directives'],
+        NodeKind::INTERFACE_TYPE_DEFINITION    => ['description', 'name', 'directives', 'fields'],
+        NodeKind::UNION_TYPE_DEFINITION        => ['description', 'name', 'directives', 'types'],
+        NodeKind::ENUM_TYPE_DEFINITION         => ['description', 'name', 'directives', 'values'],
+        NodeKind::ENUM_VALUE_DEFINITION        => ['description', 'name', 'directives'],
+        NodeKind::INPUT_OBJECT_TYPE_DEFINITION => ['description', 'name', 'directives', 'fields'],
+
+        NodeKind::SCALAR_TYPE_EXTENSION       => ['name', 'directives'],
+        NodeKind::OBJECT_TYPE_EXTENSION       => ['name', 'interfaces', 'directives', 'fields'],
+        NodeKind::INTERFACE_TYPE_EXTENSION    => ['name', 'directives', 'fields'],
+        NodeKind::UNION_TYPE_EXTENSION        => ['name', 'directives', 'types'],
+        NodeKind::ENUM_TYPE_EXTENSION         => ['name', 'directives', 'values'],
+        NodeKind::INPUT_OBJECT_TYPE_EXTENSION => ['name', 'directives', 'fields'],
+
+        NodeKind::DIRECTIVE_DEFINITION => ['description', 'name', 'arguments', 'locations'],
+
+        NodeKind::SCHEMA_EXTENSION => ['directives', 'operationTypes'],
+    ];
+
+    /**
+     * Visit the AST (see class description for details)
+     *
+     * @param Node|ArrayObject|stdClass $root
+     * @param callable[]                $visitor
+     * @param mixed[]|null              $keyMap
+     *
+     * @return Node|mixed
+     *
+     * @throws Exception
+     *
+     * @api
+     */
+    public static function visit($root, $visitor, $keyMap = null)
+    {
+        $visitorKeys = $keyMap ?: self::$visitorKeys;
+
+        $stack     = null;
+        $inArray   = $root instanceof NodeList || is_array($root);
+        $keys      = [$root];
+        $index     = -1;
+        $edits     = [];
+        $parent    = null;
+        $path      = [];
+        $ancestors = [];
+        $newRoot   = $root;
+
+        $UNDEFINED = null;
+
+        do {
+            $index++;
+            $isLeaving = $index === count($keys);
+            $key       = null;
+            $node      = null;
+            $isEdited  = $isLeaving && count($edits) !== 0;
+
+            if ($isLeaving) {
+                $key    = ! $ancestors ? $UNDEFINED : $path[count($path) - 1];
+                $node   = $parent;
+                $parent = array_pop($ancestors);
+
+                if ($isEdited) {
+                    if ($inArray) {
+                        // $node = $node; // arrays are value types in PHP
+                        if ($node instanceof NodeList) {
+                            $node = clone $node;
+                        }
+                    } else {
+                        $node = clone $node;
+                    }
+                    $editOffset = 0;
+                    for ($ii = 0; $ii < count($edits); $ii++) {
+                        $editKey   = $edits[$ii][0];
+                        $editValue = $edits[$ii][1];
+
+                        if ($inArray) {
+                            $editKey -= $editOffset;
+                        }
+                        if ($inArray && $editValue === null) {
+                            if ($node instanceof NodeList) {
+                                $node->splice($editKey, 1);
+                            } else {
+                                array_splice($node, $editKey, 1);
+                            }
+                            $editOffset++;
+                        } else {
+                            if ($node instanceof NodeList || is_array($node)) {
+                                $node[$editKey] = $editValue;
+                            } else {
+                                $node->{$editKey} = $editValue;
+                            }
+                        }
+                    }
+                }
+                $index   = $stack['index'];
+                $keys    = $stack['keys'];
+                $edits   = $stack['edits'];
+                $inArray = $stack['inArray'];
+                $stack   = $stack['prev'];
+            } else {
+                $key  = $parent !== null ? ($inArray ? $index : $keys[$index]) : $UNDEFINED;
+                $node = $parent !== null ? ($parent instanceof NodeList || is_array($parent) ? $parent[$key] : $parent->{$key}) : $newRoot;
+                if ($node === null || $node === $UNDEFINED) {
+                    continue;
+                }
+                if ($parent !== null) {
+                    $path[] = $key;
+                }
+            }
+
+            $result = null;
+            if (! $node instanceof NodeList && ! is_array($node)) {
+                if (! ($node instanceof Node)) {
+                    throw new Exception('Invalid AST Node: ' . json_encode($node));
+                }
+
+                $visitFn = self::getVisitFn($visitor, $node->kind, $isLeaving);
+
+                if ($visitFn) {
+                    $result    = call_user_func($visitFn, $node, $key, $parent, $path, $ancestors);
+                    $editValue = null;
+
+                    if ($result !== null) {
+                        if ($result instanceof VisitorOperation) {
+                            if ($result->doBreak) {
+                                break;
+                            }
+                            if (! $isLeaving && $result->doContinue) {
+                                array_pop($path);
+                                continue;
+                            }
+                            if ($result->removeNode) {
+                                $editValue = null;
+                            }
+                        } else {
+                            $editValue = $result;
+                        }
+
+                        $edits[] = [$key, $editValue];
+                        if (! $isLeaving) {
+                            if (! ($editValue instanceof Node)) {
+                                array_pop($path);
+                                continue;
+                            }
+
+                            $node = $editValue;
+                        }
+                    }
+                }
+            }
+
+            if ($result === null && $isEdited) {
+                $edits[] = [$key, $node];
+            }
+
+            if ($isLeaving) {
+                array_pop($path);
+            } else {
+                $stack   = [
+                    'inArray' => $inArray,
+                    'index'   => $index,
+                    'keys'    => $keys,
+                    'edits'   => $edits,
+                    'prev'    => $stack,
+                ];
+                $inArray = $node instanceof NodeList || is_array($node);
+
+                $keys  = ($inArray ? $node : $visitorKeys[$node->kind]) ?: [];
+                $index = -1;
+                $edits = [];
+                if ($parent !== null) {
+                    $ancestors[] = $parent;
+                }
+                $parent = $node;
+            }
+        } while ($stack);
+
+        if (count($edits) !== 0) {
+            $newRoot = $edits[0][1];
+        }
+
+        return $newRoot;
+    }
+
+    /**
+     * Returns marker for visitor break
+     *
+     * @return VisitorOperation
+     *
+     * @api
+     */
+    public static function stop()
+    {
+        $r          = new VisitorOperation();
+        $r->doBreak = true;
+
+        return $r;
+    }
+
+    /**
+     * Returns marker for skipping current node
+     *
+     * @return VisitorOperation
+     *
+     * @api
+     */
+    public static function skipNode()
+    {
+        $r             = new VisitorOperation();
+        $r->doContinue = true;
+
+        return $r;
+    }
+
+    /**
+     * Returns marker for removing a node
+     *
+     * @return VisitorOperation
+     *
+     * @api
+     */
+    public static function removeNode()
+    {
+        $r             = new VisitorOperation();
+        $r->removeNode = true;
+
+        return $r;
+    }
+
+    /**
+     * @param callable[][] $visitors
+     *
+     * @return callable[][]
+     */
+    public static function visitInParallel($visitors)
+    {
+        $visitorsCount = count($visitors);
+        $skipping      = new SplFixedArray($visitorsCount);
+
+        return [
+            'enter' => static function (Node $node) use ($visitors, $skipping, $visitorsCount) {
+                for ($i = 0; $i < $visitorsCount; $i++) {
+                    if (! empty($skipping[$i])) {
+                        continue;
+                    }
+
+                    $fn = self::getVisitFn(
+                        $visitors[$i],
+                        $node->kind, /* isLeaving */
+                        false
+                    );
+
+                    if (! $fn) {
+                        continue;
+                    }
+
+                    $result = call_user_func_array($fn, func_get_args());
+
+                    if ($result instanceof VisitorOperation) {
+                        if ($result->doContinue) {
+                            $skipping[$i] = $node;
+                        } elseif ($result->doBreak) {
+                            $skipping[$i] = $result;
+                        } elseif ($result->removeNode) {
+                            return $result;
+                        }
+                    } elseif ($result !== null) {
+                        return $result;
+                    }
+                }
+            },
+            'leave' => static function (Node $node) use ($visitors, $skipping, $visitorsCount) {
+                for ($i = 0; $i < $visitorsCount; $i++) {
+                    if (empty($skipping[$i])) {
+                        $fn = self::getVisitFn(
+                            $visitors[$i],
+                            $node->kind, /* isLeaving */
+                            true
+                        );
+
+                        if ($fn) {
+                            $result = call_user_func_array($fn, func_get_args());
+                            if ($result instanceof VisitorOperation) {
+                                if ($result->doBreak) {
+                                    $skipping[$i] = $result;
+                                } elseif ($result->removeNode) {
+                                    return $result;
+                                }
+                            } elseif ($result !== null) {
+                                return $result;
+                            }
+                        }
+                    } elseif ($skipping[$i] === $node) {
+                        $skipping[$i] = null;
+                    }
+                }
+            },
+        ];
+    }
+
+    /**
+     * Creates a new visitor instance which maintains a provided TypeInfo instance
+     * along with visiting visitor.
+     */
+    public static function visitWithTypeInfo(TypeInfo $typeInfo, $visitor)
+    {
+        return [
+            'enter' => static function (Node $node) use ($typeInfo, $visitor) {
+                $typeInfo->enter($node);
+                $fn = self::getVisitFn($visitor, $node->kind, false);
+
+                if ($fn) {
+                    $result = call_user_func_array($fn, func_get_args());
+                    if ($result !== null) {
+                        $typeInfo->leave($node);
+                        if ($result instanceof Node) {
+                            $typeInfo->enter($result);
+                        }
+                    }
+
+                    return $result;
+                }
+
+                return null;
+            },
+            'leave' => static function (Node $node) use ($typeInfo, $visitor) {
+                $fn     = self::getVisitFn($visitor, $node->kind, true);
+                $result = $fn ? call_user_func_array($fn, func_get_args()) : null;
+                $typeInfo->leave($node);
+
+                return $result;
+            },
+        ];
+    }
+
+    /**
+     * @param callable[]|null $visitor
+     * @param string          $kind
+     * @param bool            $isLeaving
+     *
+     * @return callable|null
+     */
+    public static function getVisitFn($visitor, $kind, $isLeaving)
+    {
+        if ($visitor === null) {
+            return null;
+        }
+
+        $kindVisitor = $visitor[$kind] ?? null;
+
+        if (! $isLeaving && is_callable($kindVisitor)) {
+            // { Kind() {} }
+            return $kindVisitor;
+        }
+
+        if (is_array($kindVisitor)) {
+            if ($isLeaving) {
+                $kindSpecificVisitor = $kindVisitor['leave'] ?? null;
+            } else {
+                $kindSpecificVisitor = $kindVisitor['enter'] ?? null;
+            }
+
+            if ($kindSpecificVisitor && is_callable($kindSpecificVisitor)) {
+                // { Kind: { enter() {}, leave() {} } }
+                return $kindSpecificVisitor;
+            }
+
+            return null;
+        }
+
+        $visitor += ['leave' => null, 'enter' => null];
+
+        $specificVisitor = $isLeaving ? $visitor['leave'] : $visitor['enter'];
+
+        if ($specificVisitor) {
+            if (is_callable($specificVisitor)) {
+                // { enter() {}, leave() {} }
+                return $specificVisitor;
+            }
+            $specificKindVisitor = $specificVisitor[$kind] ?? null;
+
+            if (is_callable($specificKindVisitor)) {
+                // { enter: { Kind() {} }, leave: { Kind() {} } }
+                return $specificKindVisitor;
+            }
+        }
+
+        return null;
+    }
+}

vendor/webonyx/graphql-php/src/Language/VisitorOperation.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Language;
+
+class VisitorOperation
+{
+    /** @var bool */
+    public $doBreak;
+
+    /** @var bool */
+    public $doContinue;
+
+    /** @var bool */
+    public $removeNode;
+}