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export { connectRdtLogger }
/*
* Redux Dev Tools
*
* Docs:
* https://github.com/zalmoxisus/redux-devtools-extension/blob/master/docs/API/Methods.md
*/
let _rdtLogger:RdtLogger|null|undefined = undefined;
/**
* Logs root state changes to redux dev tools
* and pushes previous state snapshots from rdt
* to the root state and any connected controllers.
* @param name the name of the dev tools instance
* @returns a connected RdtLogger or null if it cannot connect.
*/
const connectRdtLogger = (name?:string):RdtLogger|null => {
// singleton; return if defined
_rdtLogger = _rdtLogger !== undefined ? _rdtLogger :
// set the logger to null if no extension is installed
!window.__REDUX_DEVTOOLS_EXTENSION__ ? null :
// otherwise create the logger
new RdtLogger(window.__REDUX_DEVTOOLS_EXTENSION__, name).connect();
return _rdtLogger;
};
export class RdtLogger {
isConnected:boolean;
private name?:string;
private rdtExtension:DevToolsExtension;
private rdt!:DevToolsInstance;
private abortController:AbortController;
constructor(rdtExtension:DevToolsExtension, name?:string, ) {
this.name = name;
this.isConnected = false;
this.abortController = new AbortController();
this.rdtExtension = rdtExtension;
}
connect() {
if (this.isConnected) {
return this;
}
this.rdt = this.connectToDevTools(this.name);
this.listenForRootstateChanges();
this.isConnected = true;
return this;
}
disconnect() {
if (this.isConnected === false) {
return;
}
this.rdt.unsubscribe();
this.abortController.abort();
this.isConnected = false;
_rdtLogger = undefined;
}
/**
* Calls connect on the dev tools instance
* @param name the dev tools instance name
*/
private connectToDevTools(name?:string):DevToolsInstance {
const dt = this.rdtExtension.connect({name});
dt.init(RootState.current);
dt.subscribe(this.updateFromDevTools.bind(this));
return dt;
};
private listenForRootstateChanges() {
RootState.addRootStateChangeEventListener((event:RootStateChangeEvent) =>
this.rdt.send(this.getDevToolsActionFromEvent(event.event), event.rootState)), {
signal: this.abortController.signal
};
}
private getDevToolsActionFromEvent(event:Event|string):DevToolsAction {
if (typeof event === "string") {
return { type: event };
}
const action = JSON.parse(JSON.stringify(event));
delete action.isTrusted;
action.type = event.type;
return action;
}
private updateFromDevTools(data:DevToolsEventData) {
// return if initializing
if (data.type === "START" || data.payload.type === "IMPORT_STATE") {
return;
}
if (this.canHandleUpdate(data)) {
RootState.push(JSON.parse(data.state));
} else {
this.rdt.error(`DataElement RDT logging does not support payload type: ${data.type}:${data.payload.type}`);
}
}
/**
* Returns true if we can handle the data update from dev tools
* @param data
* @returns {boolean}
*/
private canHandleUpdate(data:DevToolsEventData):boolean {
return data.type === "DISPATCH" && (
data.payload.type === "JUMP_TO_ACTION" ||
data.payload.type === "JUMP_TO_STATE"
);
}
}
export interface DevToolsExtension {
/** Creates a new dev tools extension instance. */
connect({name}:{name?:string}):DevToolsInstance
}
export interface DevToolsInstance {
/** Sends the initial state to the monitor. */
init(state:any): void,
/**
* Adds a change listener. It will be called any time an action
* is dispatched from the monitor. Returns a function to
* unsubscribe the current listener.
*/
subscribe(listener:Function): void,
/** Unsubscribes all listeners. */
unsubscribe(): void,
/** Sends a new action and state manually to be shown on the monitor. */
send(action:DevToolsAction|string, state:any): void,
/** Sends the error message to be shown in the extension's monitor. */
error(message:string): void
}
interface DevToolsAction {
type: string
}
interface DevToolsEventData {
id:string,
/**
* "START" - on RDT init
* "DISPATCH" - when dispatching
*/
type: string,
payload: {
/**
* JUMP_TO_ACTION - can change state here
* TOGGLE_ACTION - dont support toggle
*/
type: string
},
state: any
}
declare global {
interface Window {
__REDUX_DEVTOOLS_EXTENSION__?: DevToolsExtension;
}
}
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