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node_modules/graphql/utilities/findDeprecatedUsages.mjs

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+import { GraphQLError } from '../error/GraphQLError';
+import { visit, visitWithTypeInfo } from '../language/visitor';
+import { getNamedType } from '../type/definition';
+import { TypeInfo } from './TypeInfo';
+/**
+ * A validation rule which reports deprecated usages.
+ *
+ * Returns a list of GraphQLError instances describing each deprecated use.
+ */
+
+export function findDeprecatedUsages(schema, ast) {
+  var errors = [];
+  var typeInfo = new TypeInfo(schema);
+  visit(ast, visitWithTypeInfo(typeInfo, {
+    Field: function Field(node) {
+      var fieldDef = typeInfo.getFieldDef();
+
+      if (fieldDef && fieldDef.isDeprecated) {
+        var parentType = typeInfo.getParentType();
+
+        if (parentType) {
+          var reason = fieldDef.deprecationReason;
+          errors.push(new GraphQLError("The field ".concat(parentType.name, ".").concat(fieldDef.name, " is deprecated.") + (reason ? ' ' + reason : ''), node));
+        }
+      }
+    },
+    EnumValue: function EnumValue(node) {
+      var enumVal = typeInfo.getEnumValue();
+
+      if (enumVal && enumVal.isDeprecated) {
+        var type = getNamedType(typeInfo.getInputType());
+
+        if (type) {
+          var reason = enumVal.deprecationReason;
+          errors.push(new GraphQLError("The enum value ".concat(type.name, ".").concat(enumVal.name, " is deprecated.") + (reason ? ' ' + reason : ''), node));
+        }
+      }
+    }
+  }));
+  return errors;
+}