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import * as React from 'react';
import * as PropTypes from 'prop-types';
import { Dispatch } from '../flux/store';
import { ApplicationStore, IApplicationStoreState } from '../store/applicationStore';
interface IApplicationStoreContext {
applicationStore: ApplicationStore;
}
export interface IDispatcher {
dispatch: Dispatch;
}
interface IApplicationStoreProps {
state: IApplicationStoreState;
}
interface IDispatchProps {
dispatch: Dispatch;
}
type FuncInfer<T> = {
([...args]: any): T;
};
type FunctionResult<T> = T extends FuncInfer<infer U> ? U : never;
type ComponentDecoratorInfer<TMergedProps> = {
<TProps>(wrappedComponent: React.ComponentType<TProps & TMergedProps>): React.ComponentClass<TProps>;
};
export type Connect<TMapProps = undefined, TMapDispatch = undefined> =
(TMapProps extends undefined ? IApplicationStoreProps : FunctionResult<TMapProps>) &
(TMapDispatch extends undefined ? IDispatchProps : FunctionResult<TMapDispatch>);
export function connect(): ComponentDecoratorInfer<IApplicationStoreProps & IDispatchProps>;
export function connect<TStateProps>(
mapStateToProps: (state: IApplicationStoreState) => TStateProps
): ComponentDecoratorInfer<TStateProps & IDispatchProps>;
export function connect<TStateProps, TDispatchProps>(
mapStateToProps: (state: IApplicationStoreState) => TStateProps,
mapDispatchToProps: (dispatcher: IDispatcher) => TDispatchProps
): ComponentDecoratorInfer<TStateProps & TDispatchProps>;
export function connect<TDispatchProps>(
mapStateToProps: undefined,
mapDispatchToProps: (dispatcher: IDispatcher) => TDispatchProps
): ComponentDecoratorInfer<IApplicationStoreProps & TDispatchProps>;
export function connect<TProps, TStateProps, TDispatchProps>(
mapStateToProps?: ((state: IApplicationStoreState) => TStateProps),
mapDispatchToProps?: ((dispatcher: IDispatcher) => TDispatchProps)
) :
((WrappedComponent: React.ComponentType<TProps & (IApplicationStoreProps | TStateProps) & IDispatchProps>) => React.ComponentType<TProps>) {
const injectApplicationStore = (WrappedComponent: React.ComponentType<TProps & (IApplicationStoreProps | TStateProps) & IDispatchProps>): React.ComponentType<TProps> => {
class StoreAdapter extends React.Component<TProps, {}> {
public static contextTypes = { ...WrappedComponent.contextTypes, applicationStore: PropTypes.object.isRequired };
context: IApplicationStoreContext;
render(): JSX.Element {
if (isWrappedComponentIsVersion1(WrappedComponent)) {
const element = React.createElement(WrappedComponent, { ...(this.props as any), state: this.store.state, dispatch: this.store.dispatch.bind(this.store) });
return element;
} else if (mapStateToProps && isWrappedComponentIsVersion2(WrappedComponent)) {
const element = React.createElement(WrappedComponent, { ...(this.props as any), ...(mapStateToProps(this.store.state) as any), dispatch: this.store.dispatch.bind(this.store) });
return element;
} else if (mapStateToProps && mapDispatchToProps && isWrappedComponentIsVersion3(WrappedComponent)) {
const element = React.createElement(WrappedComponent, { ...(this.props as any), ...(mapStateToProps(this.store.state) as any), ...(mapDispatchToProps({ dispatch: this.store.dispatch.bind(this.store)}) as any) });
return element;
} else if (!mapStateToProps && mapDispatchToProps && isWrappedComponentIsVersion4(WrappedComponent)) {
const element = React.createElement(WrappedComponent, { ...(this.props as any), state: this.store.state, ...(mapDispatchToProps({ dispatch: this.store.dispatch.bind(this.store)}) as any) });
return element;
}
throw new Error("Invalid arguments in connect.");
}
componentDidMount(): void {
this.store && this.store.changed.addHandler(this.handleStoreChanged);
}
componentWillUnmount(): void {
this.store && this.store.changed.removeHandler(this.handleStoreChanged);
}
private get store(): ApplicationStore {
return this.context.applicationStore;
}
private handleStoreChanged = () => {
this.forceUpdate();
}
}
return StoreAdapter;
}
return injectApplicationStore;
/* inline methods */
function isWrappedComponentIsVersion1(wrappedComponent: any): wrappedComponent is React.ComponentType<TProps & IApplicationStoreProps & IDispatchProps> {
return !mapStateToProps && !mapDispatchToProps;
}
function isWrappedComponentIsVersion2(wrappedComponent: any): wrappedComponent is React.ComponentType<TProps & TStateProps & IDispatchProps> {
return !!mapStateToProps && !mapDispatchToProps;
}
function isWrappedComponentIsVersion3(wrappedComponent: any): wrappedComponent is React.ComponentType<TProps & TStateProps & TDispatchProps> {
return !!mapStateToProps && !!mapDispatchToProps;
}
function isWrappedComponentIsVersion4(wrappedComponent: any): wrappedComponent is React.ComponentType<TProps & TStateProps & TDispatchProps> {
return !mapStateToProps && !!mapDispatchToProps;
}
}
interface ApplicationStoreProviderProps extends React.Props<ApplicationStoreProvider> {
applicationStore: ApplicationStore;
}
export class ApplicationStoreProvider extends React.Component<ApplicationStoreProviderProps>
implements /* React.ComponentLifecycle<ApplicationStoreProviderProps, any>, */ React.ChildContextProvider<IApplicationStoreContext> {
public static childContextTypes = { applicationStore: PropTypes.object.isRequired };
getChildContext(): IApplicationStoreContext {
return {
applicationStore: this.props.applicationStore
};
}
render(): JSX.Element {
return React.Children.only(this.props.children);
}
}
export default connect;
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