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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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tree75be5fba4368472fb11c8015aee026b2b9a71888 /includes/external/school/node_modules/graphql/validation/rules/NoUndefinedVariablesRule.js.flow
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+// @flow strict
+import { GraphQLError } from '../../error/GraphQLError';
+
+import type { ASTVisitor } from '../../language/visitor';
+
+import type { ValidationContext } from '../ValidationContext';
+
+/**
+ * No undefined variables
+ *
+ * A GraphQL operation is only valid if all variables encountered, both directly
+ * and via fragment spreads, are defined by that operation.
+ */
+export function NoUndefinedVariablesRule(
+ context: ValidationContext,
+): ASTVisitor {
+ let variableNameDefined = Object.create(null);
+
+ return {
+ OperationDefinition: {
+ enter() {
+ variableNameDefined = Object.create(null);
+ },
+ leave(operation) {
+ const usages = context.getRecursiveVariableUsages(operation);
+
+ for (const { node } of usages) {
+ const varName = node.name.value;
+ if (variableNameDefined[varName] !== true) {
+ context.reportError(
+ new GraphQLError(
+ operation.name
+ ? `Variable "$${varName}" is not defined by operation "${operation.name.value}".`
+ : `Variable "$${varName}" is not defined.`,
+ [node, operation],
+ ),
+ );
+ }
+ }
+ },
+ },
+ VariableDefinition(node) {
+ variableNameDefined[node.variable.name.value] = true;
+ },
+ };
+}