openai/src/_vendor/zod-to-json-schema/parsers/optional.ts

The official TypeScript library for the OpenAI API

import { ZodOptionalDef } from 'zod';
import { JsonSchema7Type, parseDef } from '../parseDef';
import { Refs } from '../Refs';

export const parseOptionalDef = (def: ZodOptionalDef, refs: Refs): JsonSchema7Type | undefined => {
  if (refs.currentPath.toString() === refs.propertyPath?.toString()) {
    return parseDef(def.innerType._def, refs);
  }

  const innerSchema = parseDef(def.innerType._def, {
    ...refs,
    currentPath: [...refs.currentPath, 'anyOf', '1'],
  });

  return innerSchema ?
      {
        anyOf: [
          {
            not: {},
          },
          innerSchema,
        ],
      }
    : {};
};