1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/**
* ============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 React, { FC, useContext, createContext, useState, useEffect, useRef } from 'react';
import { Dispatch } from './store';
import { ApplicationStore, IApplicationStoreState } from '../store/applicationStore';
const LogLevel = +(localStorage.getItem('log.odlux.framework.flux.connect') || 0);
interface IApplicationStoreContext {
applicationStore: ApplicationStore;
}
export interface IDispatcher {
dispatch: Dispatch;
}
interface IApplicationStoreProps {
state: IApplicationStoreState;
}
interface IDispatchProps {
dispatch: Dispatch;
}
type ComponentDecoratorInfer<TMergedProps> = {
<TProps>(wrappedComponent: React.ComponentType<TProps & TMergedProps>): React.ComponentClass<Omit<TProps & TMergedProps, keyof TMergedProps>>;
};
const ApplicationStoreContext = createContext<IApplicationStoreContext | undefined>(undefined);
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, {}> {
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();
}
}
StoreAdapter.contextType = ApplicationStoreContext;
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;
}
}
type ApplicationStoreProviderProps = {
applicationStore: ApplicationStore;
}
export const ApplicationStoreProvider: FC<ApplicationStoreProviderProps> = (props) => {
const { applicationStore, children } = props;
return (
<ApplicationStoreContext.Provider value={{ applicationStore }}>
{children}
</ApplicationStoreContext.Provider>
);
};
export const useApplicationStore = (): ApplicationStore => {
const context = useContext(ApplicationStoreContext);
if (context == null || context.applicationStore == null) {
throw new Error("Requires application store provider!")
}
return context.applicationStore
};
export const useSelectApplicationState = <TProp extends unknown >( selector: (state: IApplicationStoreState) => TProp, eqFunc = (a: TProp, b: TProp) => a === b ): TProp => {
const context = useContext(ApplicationStoreContext);
if (context == null || context.applicationStore == null) {
throw new Error("Requires application store provider!")
}
const [propState, setPropState] = useState<TProp>(selector(context.applicationStore.state));
const selectorRef = useRef(selector);
selectorRef.current = selector;
const propStateRef = useRef({propState});
propStateRef.current.propState = propState;
useEffect(() => {
if (context == null || context.applicationStore == null) {
throw new Error("Requires application store provider!")
}
const changedHandler = () => {
const newState = selectorRef.current(context.applicationStore.state);
if (!eqFunc(newState, propStateRef.current.propState)) {
setPropState(newState);
}
};
if (LogLevel > 3) {
console.log("useSelectApplicationState: adding handler", changedHandler);
}
context.applicationStore.changed.addHandler(changedHandler);
return () => {
if (LogLevel > 3) {
console.log("useSelectApplicationState: removing handler", changedHandler);
}
context.applicationStore.changed.removeHandler(changedHandler);
}
}, [context]);
return propState;
};
export const useApplicationDispatch = (): Dispatch => {
const context = useContext(ApplicationStoreContext);
if (context == null || context.applicationStore == null) {
throw new Error("Requires application store provider!")
}
return context.applicationStore.dispatch;
};
|
