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

The official TypeScript library for the OpenAI API

import { ZodMapDef } from 'zod';
import { JsonSchema7Type, parseDef } from '../parseDef';
import { Refs } from '../Refs';
import { JsonSchema7RecordType, parseRecordDef } from './record';

export type JsonSchema7MapType = {
  type: 'array';
  maxItems: 125;
  items: {
    type: 'array';
    items: [JsonSchema7Type, JsonSchema7Type];
    minItems: 2;
    maxItems: 2;
  };
};

export function parseMapDef(def: ZodMapDef, refs: Refs): JsonSchema7MapType | JsonSchema7RecordType {
  if (refs.mapStrategy === 'record') {
    return parseRecordDef(def, refs);
  }

  const keys =
    parseDef(def.keyType._def, {
      ...refs,
      currentPath: [...refs.currentPath, 'items', 'items', '0'],
    }) || {};
  const values =
    parseDef(def.valueType._def, {
      ...refs,
      currentPath: [...refs.currentPath, 'items', 'items', '1'],
    }) || {};
  return {
    type: 'array',
    maxItems: 125,
    items: {
      type: 'array',
      items: [keys, values],
      minItems: 2,
      maxItems: 2,
    },
  };
}