react-redux.d.ts for redux@4.0.0-beta.2

react-redux.d.ts

// Type definitions for react-redux 5.0.8
// Project: https://github.com/rackt/react-redux
// Definitions by: Qubo <https://github.com/tkqubo>,
//                 Thomas Hasner <https://github.com/thasner>,
//                 Kenzie Togami <https://github.com/kenzierocks>,
//                 Curits Layne <https://github.com/clayne11>
//                 Frank Tan <https://github.com/tansongyang>
//                 Nicholas Boll <https://github.com/nicholasboll>
//                 Dibyo Majumdar <https://github.com/mdibyo>
//                 Prashant Deva <https://github.com/pdeva>
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
// TypeScript Version: 2.4
// Known Issue:
// There is a known issue in TypeScript, which doesn't allow decorators to change the signature of the classes
// they are decorating. Due to this, if you are using @connect() decorator in your code,
// you will see a bunch of errors from TypeScript. The current workaround is to use connect() as a function call on
// a separate line instead of as a decorator. Discussed in this github issue:
// https://github.com/DefinitelyTyped/DefinitelyTyped/issues/20796
import * as React from 'react';
import * as Redux from 'redux';

type ComponentClass<P> = React.ComponentClass<P>;
type StatelessComponent<P> = React.StatelessComponent<P>;
type Component<P> = React.ComponentType<P>;
type ReactNode = React.ReactNode;
type Action<T = any> = Redux.Action<T>;
type Store<S = any, A extends Action = Redux.AnyAction> = Redux.Store<S, A>;
type Dispatch<A extends Action = Redux.AnyAction> = Redux.Dispatch<A>;
type ActionCreator<A> = Redux.ActionCreator<A>;

// Diff / Omit taken from https://github.com/Microsoft/TypeScript/issues/12215#issuecomment-311923766
type Diff<T extends string, U extends string> = ({[P in T]: P } & {[P in U]: never } & { [x: string]: never })[T];
type Omit<T, K extends keyof T> = Pick<T, Diff<keyof T, K>>;

export interface DispatchProp<A extends Action = Redux.AnyAction> {
  dispatch?: Dispatch<A>;
}

interface AdvancedComponentDecorator<TProps, TOwnProps> {
  (component: Component<TProps>): ComponentClass<TOwnProps>;
}

// Injects props and removes them from the prop requirements.
// Will not pass through the injected props if they are passed in during
// render. Also adds new prop requirements from TNeedsProps.
export interface InferableComponentEnhancerWithProps<TInjectedProps, TNeedsProps> {
  <P extends TInjectedProps>(
    component: Component<P>
  ): ComponentClass<Omit<P, keyof TInjectedProps> & TNeedsProps> & { WrappedComponent: Component<P> }
}

// Injects props and removes them from the prop requirements.
// Will not pass through the injected props if they are passed in during
// render.
export type InferableComponentEnhancer<TInjectedProps> =
  InferableComponentEnhancerWithProps<TInjectedProps, {}>

/**
 * Connects a React component to a Redux store.
 *
 * - Without arguments, just wraps the component, without changing the behavior / props
 *
 * - If 2 params are passed (3rd param, mergeProps, is skipped), default behavior
 * is to override ownProps (as stated in the docs), so what remains is everything that's
 * not a state or dispatch prop
 *
 * - When 3rd param is passed, we don't know if ownProps propagate and whether they
 * should be valid component props, because it depends on mergeProps implementation.
 * As such, it is the user's responsibility to extend ownProps interface from state or
 * dispatch props or both when applicable
 *
 * @param mapStateToProps
 * @param mapDispatchToProps
 * @param mergeProps
 * @param options
 */
export interface Connect {
  (): InferableComponentEnhancer<DispatchProp<any>>;

  <TStateProps = {}, no_dispatch = {}, TOwnProps = {}, State = {}>(
    mapStateToProps: MapStateToPropsParam<TStateProps, TOwnProps, State>
  ): InferableComponentEnhancerWithProps<TStateProps & DispatchProp<any>, TOwnProps>;

  <no_state = {}, TDispatchProps = {}, TOwnProps = {}>(
    mapStateToProps: null | undefined,
    mapDispatchToProps: MapDispatchToPropsParam<TDispatchProps, TOwnProps>
  ): InferableComponentEnhancerWithProps<TDispatchProps, TOwnProps>;

  <TStateProps = {}, TDispatchProps = {}, TOwnProps = {}, State = {}>(
    mapStateToProps: MapStateToPropsParam<TStateProps, TOwnProps, State>,
    mapDispatchToProps: MapDispatchToPropsParam<TDispatchProps, TOwnProps>
  ): InferableComponentEnhancerWithProps<TStateProps & TDispatchProps, TOwnProps>;

  <TStateProps = {}, no_dispatch = {}, TOwnProps = {}, TMergedProps = {}, State = {}>(
    mapStateToProps: MapStateToPropsParam<TStateProps, TOwnProps, State>,
    mapDispatchToProps: null | undefined,
    mergeProps: MergeProps<TStateProps, undefined, TOwnProps, TMergedProps>,
  ): InferableComponentEnhancerWithProps<TMergedProps, TOwnProps>;

  <no_state = {}, TDispatchProps = {}, TOwnProps = {}, TMergedProps = {}>(
    mapStateToProps: null | undefined,
    mapDispatchToProps: MapDispatchToPropsParam<TDispatchProps, TOwnProps>,
    mergeProps: MergeProps<undefined, TDispatchProps, TOwnProps, TMergedProps>,
  ): InferableComponentEnhancerWithProps<TMergedProps, TOwnProps>;

  <no_state = {}, no_dispatch = {}, TOwnProps = {}, TMergedProps = {}>(
    mapStateToProps: null | undefined,
    mapDispatchToProps: null | undefined,
    mergeProps: MergeProps<undefined, undefined, TOwnProps, TMergedProps>,
  ): InferableComponentEnhancerWithProps<TMergedProps, TOwnProps>;

  <TStateProps = {}, TDispatchProps = {}, TOwnProps = {}, TMergedProps = {}, State = {}>(
    mapStateToProps: MapStateToPropsParam<TStateProps, TOwnProps, State>,
    mapDispatchToProps: MapDispatchToPropsParam<TDispatchProps, TOwnProps>,
    mergeProps: MergeProps<TStateProps, TDispatchProps, TOwnProps, TMergedProps>,
  ): InferableComponentEnhancerWithProps<TMergedProps, TOwnProps>;

  <TStateProps = {}, no_dispatch = {}, TOwnProps = {}, State = {}>(
    mapStateToProps: MapStateToPropsParam<TStateProps, TOwnProps, State>,
    mapDispatchToProps: null | undefined,
    mergeProps: null | undefined,
    options: Options<State, TStateProps, TOwnProps>
  ): InferableComponentEnhancerWithProps<DispatchProp<any> & TStateProps, TOwnProps>;

  <TStateProps = {}, TDispatchProps = {}, TOwnProps = {}>(
    mapStateToProps: null | undefined,
    mapDispatchToProps: MapDispatchToPropsParam<TDispatchProps, TOwnProps>,
    mergeProps: null | undefined,
    options: Options<{}, TStateProps, TOwnProps>
  ): InferableComponentEnhancerWithProps<TDispatchProps, TOwnProps>;

  <TStateProps = {}, TDispatchProps = {}, TOwnProps = {}, State = {}>(
    mapStateToProps: MapStateToPropsParam<TStateProps, TOwnProps, State>,
    mapDispatchToProps: MapDispatchToPropsParam<TDispatchProps, TOwnProps>,
    mergeProps: null | undefined,
    options: Options<State, TStateProps, TOwnProps>
  ): InferableComponentEnhancerWithProps<TStateProps & TDispatchProps, TOwnProps>;

  <TStateProps = {}, TDispatchProps = {}, TOwnProps = {}, TMergedProps = {}, State = {}>(
    mapStateToProps: MapStateToPropsParam<TStateProps, TOwnProps, State>,
    mapDispatchToProps: MapDispatchToPropsParam<TDispatchProps, TOwnProps>,
    mergeProps: MergeProps<TStateProps, TDispatchProps, TOwnProps, TMergedProps>,
    options: Options<State, TStateProps, TOwnProps, TMergedProps>
  ): InferableComponentEnhancerWithProps<TMergedProps, TOwnProps>;
}

/**
 * The connect function. See {@type Connect} for details.
 */
export declare const connect: Connect;

interface MapStateToProps<TStateProps, TOwnProps, State> {
  (state: State, ownProps: TOwnProps): TStateProps;
}

interface MapStateToPropsFactory<TStateProps, TOwnProps, State> {
  (initialState: State, ownProps: TOwnProps): MapStateToProps<TStateProps, TOwnProps, State>;
}

type MapStateToPropsParam<TStateProps, TOwnProps, State> = MapStateToPropsFactory<TStateProps, TOwnProps, State> | MapStateToProps<TStateProps, TOwnProps, State> | null | undefined;

interface MapDispatchToPropsFunction<TDispatchProps, TOwnProps> {
  (dispatch: Dispatch<any>, ownProps: TOwnProps): TDispatchProps;
}

type MapDispatchToProps<TDispatchProps, TOwnProps> =
  MapDispatchToPropsFunction<TDispatchProps, TOwnProps> | TDispatchProps;

interface MapDispatchToPropsFactory<TDispatchProps, TOwnProps> {
  (dispatch: Dispatch<any>, ownProps: TOwnProps): MapDispatchToProps<TDispatchProps, TOwnProps>;
}

type MapDispatchToPropsParam<TDispatchProps, TOwnProps> = MapDispatchToPropsFactory<TDispatchProps, TOwnProps> | MapDispatchToProps<TDispatchProps, TOwnProps>;

interface MergeProps<TStateProps, TDispatchProps, TOwnProps, TMergedProps> {
  (stateProps: TStateProps, dispatchProps: TDispatchProps, ownProps: TOwnProps): TMergedProps;
}

interface Options<State = {}, TStateProps = {}, TOwnProps = {}, TMergedProps = {}> extends ConnectOptions {
  /**
   * If true, implements shouldComponentUpdate and shallowly compares the result of mergeProps,
   * preventing unnecessary updates, assuming that the component is a “pure” component
   * and does not rely on any input or state other than its props and the selected Redux store’s state.
   * Defaults to true.
   * @default true
   */
  pure?: boolean;

  /**
   * When pure, compares incoming store state to its previous value.
   * @default strictEqual
   */
  areStatesEqual?: (nextState: State, prevState: State) => boolean;

  /**
   * When pure, compares incoming props to its previous value.
   * @default shallowEqual
   */
  areOwnPropsEqual?: (nextOwnProps: TOwnProps, prevOwnProps: TOwnProps) => boolean;

  /**
   * When pure, compares the result of mapStateToProps to its previous value.
   * @default shallowEqual
   */
  areStatePropsEqual?: (nextStateProps: TStateProps, prevStateProps: TStateProps) => boolean;

  /**
   * When pure, compares the result of mergeProps to its previous value.
   * @default shallowEqual
   */
  areMergedPropsEqual?: (nextMergedProps: TMergedProps, prevMergedProps: TMergedProps) => boolean;
}

/**
 * Connects a React component to a Redux store. It is the base for {@link connect} but is less opinionated about
 * how to combine <code>state</code>, <code>props</code>, and <code>dispatch</code> into your final props. It makes no
 * assumptions about defaults or memoization of results, leaving those responsibilities to the caller.It does not
 * modify the component class passed to it; instead, it returns a new, connected component class for you to use.
 *
 * @param selectorFactory The selector factory. See {@type SelectorFactory} for details.
 * @param connectOptions If specified, further customizes the behavior of the connector. Additionally, any extra
 *     options will be passed through to your <code>selectorFactory</code> in the <code>factoryOptions</code> argument.
 */
export declare function connectAdvanced<A extends Action, TProps, TOwnProps, TFactoryOptions = {}>(
  selectorFactory: SelectorFactory<A, TProps, TOwnProps, TFactoryOptions>,
  connectOptions?: ConnectOptions & TFactoryOptions
): AdvancedComponentDecorator<TProps, TOwnProps>;

/**
 * Initializes a selector function (during each instance's constructor). That selector function is called any time the
 * connector component needs to compute new props, as a result of a store state change or receiving new props. The
 * result of <code>selector</code> is expected to be a plain object, which is passed as the props to the wrapped
 * component. If a consecutive call to <code>selector</code> returns the same object (<code>===</code>) as its previous
 * call, the component will not be re-rendered. It's the responsibility of <code>selector</code> to return that
 * previous object when appropriate.
 */
export interface SelectorFactory<A extends Action, TProps, TOwnProps, TFactoryOptions> {
  (dispatch: Dispatch<A>, factoryOptions: TFactoryOptions): Selector<A, TProps, TOwnProps>
}

export interface Selector<S, TProps, TOwnProps> {
  (state: S, ownProps: TOwnProps): TProps
}

export interface ConnectOptions {
  /**
   * Computes the connector component's displayName property relative to that of the wrapped component. Usually
   * overridden by wrapper functions.
   *
   * @default name => 'ConnectAdvanced('+name+')'
   * @param componentName
   */
  getDisplayName?: (componentName: string) => string
  /**
   * Shown in error messages. Usually overridden by wrapper functions.
   *
   * @default 'connectAdvanced'
   */
  methodName?: string
  /**
   * If defined, a property named this value will be added to the props passed to the wrapped component. Its value
   * will be the number of times the component has been rendered, which can be useful for tracking down unnecessary
   * re-renders.
   *
   * @default undefined
   */
  renderCountProp?: string
  /**
   * Controls whether the connector component subscribes to redux store state changes. If set to false, it will only
   * re-render on <code>componentWillReceiveProps</code>.
   *
   * @default true
   */
  shouldHandleStateChanges?: boolean
  /**
   * The key of props/context to get the store. You probably only need this if you are in the inadvisable position of
   * having multiple stores.
   *
   * @default 'store'
   */
  storeKey?: string
  /**
   * If true, stores a ref to the wrapped component instance and makes it available via getWrappedInstance() method.
   *
   * @default false
   */
  withRef?: boolean
}

export interface ProviderProps<S, A extends Action> {
  /**
   * The single Redux store in your application.
   */
  store?: Store<S, A>;
  children?: ReactNode;
}

/**
 * Makes the Redux store available to the connect() calls in the component hierarchy below.
 */
export class Provider<S = any, A extends Action = Action> extends React.Component<ProviderProps<S, A>, {}> { }

/**
 * Creates a new <Provider> which will set the Redux Store on the passed key of the context. You probably only need this
 * if you are in the inadvisable position of having multiple stores. You will also need to pass the same storeKey to the
 * options argument of connect.
 *
 * @param storeKey The key of the context on which to set the store.
 */
export declare function createProvider(storeKey: string): typeof Provider;