Function process

packages/zod/src/v4/core/to-json-schema.ts:139–215

(
  schema: T,
  ctx: ToJSONSchemaContext,
  _params: ProcessParams = { path: [], schemaPath: [] }
)

}

export function process<T extends schemas.$ZodType>(
  schema: T,
  ctx: ToJSONSchemaContext,
  _params: ProcessParams = { path: [], schemaPath: [] }
): JSONSchema.BaseSchema {
  const def = schema._zod.def as schemas.$ZodTypes["_zod"]["def"];

  // check for schema in seens
  const seen = ctx.seen.get(schema);

  if (seen) {
    seen.count++;

    // check if cycle
    const isCycle = _params.schemaPath.includes(schema);
    if (isCycle) {
      seen.cycle = _params.path;
    }

    return seen.schema;
  }

  // initialize
  const result: Seen = { schema: {}, count: 1, cycle: undefined, path: _params.path };
  ctx.seen.set(schema, result);

  // custom method overrides default behavior
  const overrideSchema = schema._zod.toJSONSchema?.();
  if (overrideSchema) {
    result.schema = overrideSchema as any;
  } else {
    const params = {
      ..._params,
      schemaPath: [..._params.schemaPath, schema],
      path: _params.path,
    };

    if (schema._zod.processJSONSchema) {
      schema._zod.processJSONSchema(ctx, result.schema, params);
    } else {
      const _json = result.schema;
      const processor = ctx.processors[def.type];
      if (!processor) {
        throw new Error(`[toJSONSchema]: Non-representable type encountered: ${def.type}`);
      }
      processor(schema, ctx, _json, params);
    }

    const parent = schema._zod.parent as T;

    if (parent) {
      // Also set ref if processor didn't (for inheritance)
      if (!result.ref) result.ref = parent;
      process(parent, ctx, params);
      ctx.seen.get(parent)!.isParent = true;
    }
  }