Initialisation

Added the packages and files for the backend server

node_modules/graphql/validation/rules/ExecutableDefinitionsRule.js

@@ -0,0 +1,46 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true,
+});
+exports.ExecutableDefinitionsRule = ExecutableDefinitionsRule;
+
+var _GraphQLError = require('../../error/GraphQLError.js');
+
+var _kinds = require('../../language/kinds.js');
+
+var _predicates = require('../../language/predicates.js');
+
+/**
+ * Executable definitions
+ *
+ * A GraphQL document is only valid for execution if all definitions are either
+ * operation or fragment definitions.
+ *
+ * See https://spec.graphql.org/draft/#sec-Executable-Definitions
+ */
+function ExecutableDefinitionsRule(context) {
+  return {
+    Document(node) {
+      for (const definition of node.definitions) {
+        if (!(0, _predicates.isExecutableDefinitionNode)(definition)) {
+          const defName =
+            definition.kind === _kinds.Kind.SCHEMA_DEFINITION ||
+            definition.kind === _kinds.Kind.SCHEMA_EXTENSION
+              ? 'schema'
+              : '"' + definition.name.value + '"';
+          context.reportError(
+            new _GraphQLError.GraphQLError(
+              `The ${defName} definition is not executable.`,
+              {
+                nodes: definition,
+              },
+            ),
+          );
+        }
+      }
+
+      return false;
+    },
+  };
+}