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authorMinteck <contact@minteck.org>2023-02-23 19:34:56 +0100
committerMinteck <contact@minteck.org>2023-02-23 19:34:56 +0100
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+// @flow strict
+import { GraphQLError } from '../../error/GraphQLError';
+
+import type { ASTVisitor } from '../../language/visitor';
+import { Kind } from '../../language/kinds';
+
+import type { ASTValidationContext } from '../ValidationContext';
+
+/**
+ * Lone anonymous operation
+ *
+ * A GraphQL document is only valid if when it contains an anonymous operation
+ * (the query short-hand) that it contains only that one operation definition.
+ */
+export function LoneAnonymousOperationRule(
+ context: ASTValidationContext,
+): ASTVisitor {
+ let operationCount = 0;
+ return {
+ Document(node) {
+ operationCount = node.definitions.filter(
+ (definition) => definition.kind === Kind.OPERATION_DEFINITION,
+ ).length;
+ },
+ OperationDefinition(node) {
+ if (!node.name && operationCount > 1) {
+ context.reportError(
+ new GraphQLError(
+ 'This anonymous operation must be the only defined operation.',
+ node,
+ ),
+ );
+ }
+ },
+ };
+}