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node_modules/graphql/validation/rules/UniqueArgumentNames.js

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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.duplicateArgMessage = duplicateArgMessage;
+exports.UniqueArgumentNames = UniqueArgumentNames;
+
+var _GraphQLError = require("../../error/GraphQLError");
+
+function duplicateArgMessage(argName) {
+  return "There can be only one argument named \"".concat(argName, "\".");
+}
+/**
+ * Unique argument names
+ *
+ * A GraphQL field or directive is only valid if all supplied arguments are
+ * uniquely named.
+ */
+
+
+function UniqueArgumentNames(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.GraphQLError(duplicateArgMessage(argName), [knownArgNames[argName], node.name]));
+      } else {
+        knownArgNames[argName] = node.name;
+      }
+
+      return false;
+    }
+  };
+}