Providing existing types for some $ref

[nigelsim]

I would like to use the native types for GeoJSON objects from the geojson types package over the (broken) ones that are generated by springdoc. Is it possible to provide a mapping from a $ref to a type import?

[muhammetozkoc]

You can do this with the Node API. I tested it by replacing the generated component definition instead of trying to handle every $ref. The other generated types still point to components["schemas"]["Point"], while that component uses the imported GeoJSON type.

import openapiTS from "openapi-typescript";
import ts from "typescript";

const geoJsonTypes = new Map([
  ["#/components/schemas/Point", "Point"],
  ["#/components/schemas/Polygon", "Polygon"],
  ["#/components/schemas/MultiPolygon", "MultiPolygon"],
]);

const ast = await openapiTS(schema, {
  inject:
    'import type { Point, Polygon, MultiPolygon } from "geojson";',
  transform(_schemaObject, metadata) {
    const typeName = geoJsonTypes.get(metadata.path);
    if (typeName) {
      return ts.factory.createTypeReferenceNode(typeName);
    }
  },
});

This produces Point: Point in components.schemas. The type on the right comes from geojson, and existing references keep working.