Machine.ts

import { StateNode } from './StateNode';
import {
  AnyEventObject,
  BaseActionObject,
  DefaultContext,
  EventObject,
  MachineConfig,
  MachineOptions,
  InternalMachineOptions,
  StateMachine,
  StateSchema,
  Typestate,
  ServiceMap
} from './types';
import {
  TypegenConstraint,
  TypegenDisabled,
  ResolveTypegenMeta
} from './typegenTypes';
import { IS_PRODUCTION } from './environment';

let warned = false;

/**
 * @deprecated Use `createMachine(...)` instead.
 */
export function Machine<
  TContext = any,
  TEvent extends EventObject = AnyEventObject
>(
  config: MachineConfig<TContext, any, TEvent>,
  options?: InternalMachineOptions<
    TContext,
    TEvent,
    ResolveTypegenMeta<TypegenDisabled, TEvent, BaseActionObject, ServiceMap>
  >,
  initialContext?: TContext
): StateMachine<
  TContext,
  any,
  TEvent,
  any,
  BaseActionObject,
  ServiceMap,
  ResolveTypegenMeta<TypegenDisabled, TEvent, BaseActionObject, ServiceMap>
>;
export function Machine<
  TContext = DefaultContext,
  TStateSchema extends StateSchema = any,
  TEvent extends EventObject = AnyEventObject
>(
  config: MachineConfig<TContext, TStateSchema, TEvent>,
  options?: InternalMachineOptions<
    TContext,
    TEvent,
    ResolveTypegenMeta<TypegenDisabled, TEvent, BaseActionObject, ServiceMap>
  >,
  initialContext?: TContext
): StateMachine<
  TContext,
  TStateSchema,
  TEvent,
  any,
  BaseActionObject,
  ServiceMap,
  ResolveTypegenMeta<TypegenDisabled, TEvent, BaseActionObject, ServiceMap>
>;
export function Machine<
  TContext = DefaultContext,
  TStateSchema extends StateSchema = any,
  TEvent extends EventObject = AnyEventObject
>(
  config: MachineConfig<TContext, TStateSchema, TEvent>,
  options?: MachineOptions<TContext, TEvent>,
  initialContext: TContext | (() => TContext) | undefined = config.context
): any {
  return new StateNode<TContext, TStateSchema, TEvent>(
    config,
    options,
    initialContext
  ) as any;
}

export function createMachine<
  TContext,
  TEvent extends EventObject = AnyEventObject,
  TTypestate extends Typestate<TContext> = { value: any; context: TContext },
  TServiceMap extends ServiceMap = ServiceMap,
  TTypesMeta extends TypegenConstraint = TypegenDisabled
>(
  config: MachineConfig<
    TContext,
    any,
    TEvent,
    BaseActionObject,
    TServiceMap,
    TTypesMeta
  >,
  options?: InternalMachineOptions<
    TContext,
    TEvent,
    ResolveTypegenMeta<TTypesMeta, TEvent, BaseActionObject, TServiceMap>
  >
): StateMachine<
  TContext,
  any,
  TEvent,
  TTypestate,
  BaseActionObject,
  TServiceMap,
  ResolveTypegenMeta<TTypesMeta, TEvent, BaseActionObject, TServiceMap>
>;

export function createMachine<
  TContext,
  TEvent extends EventObject = AnyEventObject,
  TTypestate extends Typestate<TContext> = { value: any; context: TContext },
  TServiceMap extends ServiceMap = ServiceMap,
  TTypesMeta extends TypegenConstraint = TypegenDisabled
>(
  config: MachineConfig<
    TContext,
    any,
    TEvent,
    BaseActionObject,
    TServiceMap,
    TTypesMeta
  >,
  options?: MachineOptions<
    TContext,
    TEvent,
    BaseActionObject,
    TServiceMap,
    TTypesMeta
  >
): StateMachine<
  TContext,
  any,
  TEvent,
  TTypestate,
  BaseActionObject,
  TServiceMap,
  TTypesMeta
> {
  if (!IS_PRODUCTION && !('predictableActionArguments' in config) && !warned) {
    warned = true;
    console.warn(
      'It is highly recommended to set `predictableActionArguments` to `true` when using `createMachine`. https://xstate.js.org/docs/guides/actions.html'
    );
  }

  return new StateNode(config, options as any) as any;
}