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node_modules/graphql/validation/rules/UniqueEnumValueNames.mjs

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+import { GraphQLError } from '../../error/GraphQLError';
+import { isEnumType } from '../../type/definition';
+export function duplicateEnumValueNameMessage(typeName, valueName) {
+  return "Enum value \"".concat(typeName, ".").concat(valueName, "\" can only be defined once.");
+}
+export function existedEnumValueNameMessage(typeName, valueName) {
+  return "Enum value \"".concat(typeName, ".").concat(valueName, "\" already exists in the schema. It cannot also be defined in this type extension.");
+}
+/**
+ * Unique enum value names
+ *
+ * A GraphQL enum type is only valid if all its values are uniquely named.
+ */
+
+export function UniqueEnumValueNames(context) {
+  var schema = context.getSchema();
+  var existingTypeMap = schema ? schema.getTypeMap() : Object.create(null);
+  var knownValueNames = Object.create(null);
+  return {
+    EnumTypeDefinition: checkValueUniqueness,
+    EnumTypeExtension: checkValueUniqueness
+  };
+
+  function checkValueUniqueness(node) {
+    var typeName = node.name.value;
+
+    if (!knownValueNames[typeName]) {
+      knownValueNames[typeName] = Object.create(null);
+    }
+
+    if (node.values) {
+      var valueNames = knownValueNames[typeName];
+
+      for (var _i2 = 0, _node$values2 = node.values; _i2 < _node$values2.length; _i2++) {
+        var valueDef = _node$values2[_i2];
+        var valueName = valueDef.name.value;
+        var existingType = existingTypeMap[typeName];
+
+        if (isEnumType(existingType) && existingType.getValue(valueName)) {
+          context.reportError(new GraphQLError(existedEnumValueNameMessage(typeName, valueName), valueDef.name));
+        } else if (valueNames[valueName]) {
+          context.reportError(new GraphQLError(duplicateEnumValueNameMessage(typeName, valueName), [valueNames[valueName], valueDef.name]));
+        } else {
+          valueNames[valueName] = valueDef.name;
+        }
+      }
+    }
+
+    return false;
+  }
+}