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Diffstat (limited to 'sdnr/wt/odlux/framework/src/flux/connect.ts')
| -rw-r--r-- | sdnr/wt/odlux/framework/src/flux/connect.ts | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/sdnr/wt/odlux/framework/src/flux/connect.ts b/sdnr/wt/odlux/framework/src/flux/connect.ts new file mode 100644 index 000000000..f54e4e0f0 --- /dev/null +++ b/sdnr/wt/odlux/framework/src/flux/connect.ts @@ -0,0 +1,161 @@ +/** + * ============LICENSE_START======================================================================== + * ONAP : ccsdk feature sdnr wt odlux + * ================================================================================================= + * Copyright (C) 2019 highstreet technologies GmbH Intellectual Property. All rights reserved. + * ================================================================================================= + * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except + * in compliance with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software distributed under the License + * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express + * or implied. See the License for the specific language governing permissions and limitations under + * the License. + * ============LICENSE_END========================================================================== + */ +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 Omit<T, K extends keyof T> = Pick<T, Exclude<keyof T, K>> + +type ComponentDecoratorInfer<TMergedProps> = { + <TProps>(wrappedComponent: React.ComponentType<TProps & TMergedProps>): React.ComponentClass<Omit<TProps & TMergedProps, keyof TMergedProps>>; +}; + +export type Connect<TMapProps extends ((...args: any) => any) | undefined = undefined, TMapDispatch extends ((...args: any) => any) | undefined = undefined> = + (TMapProps extends ((...args: any) => any) ? ReturnType<TMapProps> : IApplicationStoreProps) & + (TMapDispatch extends ((...args: any) => any) ? ReturnType<TMapDispatch> : IDispatchProps); + +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) as any; //type error, fix when possible + } +} + +export default connect;
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