Version 4.5.0

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

@@ -0,0 +1,58 @@
+<?php
+namespace GraphQL\Validator\Rules;
+
+use GraphQL\Error\Error;
+use GraphQL\Language\AST\FragmentDefinitionNode;
+use GraphQL\Language\AST\NodeKind;
+use GraphQL\Language\Visitor;
+use GraphQL\Validator\ValidationContext;
+
+class NoUnusedFragments extends AbstractValidationRule
+{
+    static function unusedFragMessage($fragName)
+    {
+        return "Fragment \"$fragName\" is never used.";
+    }
+
+    public $operationDefs;
+
+    public $fragmentDefs;
+
+    public function getVisitor(ValidationContext $context)
+    {
+        $this->operationDefs = [];
+        $this->fragmentDefs = [];
+
+        return [
+            NodeKind::OPERATION_DEFINITION => function($node) {
+                $this->operationDefs[] = $node;
+                return Visitor::skipNode();
+            },
+            NodeKind::FRAGMENT_DEFINITION => function(FragmentDefinitionNode $def) {
+                $this->fragmentDefs[] = $def;
+                return Visitor::skipNode();
+            },
+            NodeKind::DOCUMENT => [
+                'leave' => function() use ($context) {
+                    $fragmentNameUsed = [];
+
+                    foreach ($this->operationDefs as $operation) {
+                        foreach ($context->getRecursivelyReferencedFragments($operation) as $fragment) {
+                            $fragmentNameUsed[$fragment->name->value] = true;
+                        }
+                    }
+
+                    foreach ($this->fragmentDefs as $fragmentDef) {
+                        $fragName = $fragmentDef->name->value;
+                        if (empty($fragmentNameUsed[$fragName])) {
+                            $context->reportError(new Error(
+                                self::unusedFragMessage($fragName),
+                                [ $fragmentDef ]
+                            ));
+                        }
+                    }
+                }
+            ]
+        ];
+    }
+}