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import { GraphQLError } from "../../error/GraphQLError.mjs";
/**
* Unique argument names
*
* A GraphQL field or directive is only valid if all supplied arguments are
* uniquely named.
*/
export function UniqueArgumentNamesRule(context) {
var knownArgNames = Object.create(null);
return {
Field: function Field() {
knownArgNames = Object.create(null);
},
Directive: function Directive() {
knownArgNames = Object.create(null);
},
Argument: function Argument(node) {
var argName = node.name.value;
if (knownArgNames[argName]) {
context.reportError(new GraphQLError("There can be only one argument named \"".concat(argName, "\"."), [knownArgNames[argName], node.name]));
} else {
knownArgNames[argName] = node.name;
}
return false;
}
};
}
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