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import Timeout = NodeJS.Timeout;
import {get, includes, join} from 'lodash';
import {Subject, Subscription} from 'rxjs';
import AStore from './store/a.store';
import storeFactory from './store/factories/store.factory';
import IConnectionManager from './auth/i.connection.manager';
import DataMiddlewareMap from './middleware/data.middleware.map';
import StoreSubscriptionUpdateType from './types/store.subscription.update.type';
import ConnectionManagerRefreshType from './types/connection.manager.refresh.type';
export default class OwservableClient extends Subject<any> {
private readonly _connectionManager: IConnectionManager;
private _ping: number = 0;
private _location: string;
private _stores: Map<string, AStore>;
private _subscriptions: Map<string, Subscription>;
private _timeout: Timeout;
public constructor(connectionManager: IConnectionManager) {
super();
this._connectionManager = connectionManager;
this._stores = new Map<string, AStore>();
this._subscriptions = new Map<string, Subscription>();
}
public disconnected(): void {
// console.log('[@owservable] -> OwservableClient disconnected');
this.clearSubscriptions();
this._connectionManager.disconnected();
clearTimeout(this._timeout);
}
private set location(location: string) {
// console.log('[@owservable] -> OwservableClient location: old:[${this._location}] new:[${location}]`);
if (location === this._location) return;
this._location = location;
this._connectionManager.location(location);
}
public async consume(message: any): Promise<void> {
// console.log('[@owservable] -> OwservableClient::consume received message", message.type);
switch (message.type) {
case 'pong':
return this._processPong(message);
case 'authenticate':
this._connectionManager.connected(message.jwt);
return this._checkSession();
case 'location': {
const {path} = message;
this.location = path;
return;
}
case 'subscribe':
return this.updateSubscription(message);
case 'unsubscribe':
return this.removeSubscription(message.target);
case 'reload':
return this.reloadData(message.target);
}
}
public ping(): void {
this.next({type: 'ping', id: new Date().getTime()});
setTimeout(() => this.ping(), 60000);
}
private _processPong(message: any): void {
const response: number = new Date().getTime();
this._ping = response - message.id;
this._connectionManager.ping(this._ping);
}
private async _checkSession(): Promise<void> {
const check: ConnectionManagerRefreshType = await this._connectionManager.checkSession();
Eif (check) this.next(check);
let refreshIn: number = get(check, 'refresh_in', 300000); // 300000 = 5min
refreshIn = Math.round((refreshIn * 95) / 100);
clearTimeout(this._timeout);
this._timeout = setTimeout(() => this._checkSession(), refreshIn);
}
private removeSubscription(target: string): void {
// console.log('[@owservable] -> OwservableClient removeSubscription: ${target}`);
this._subscriptions.get(target)?.unsubscribe();
this._subscriptions.delete(target);
this._stores.get(target)?.destroy();
this._stores.delete(target);
this.sendDebugTargets('removeSubscription', target);
}
private reloadData(target: string): void {
// console.log('[@owservable] -> OwservableClient reloadData: ${target}`);
const store: AStore = this._stores.get(target);
store.restartSubscription();
}
private updateSubscription(subscriptionConfig: StoreSubscriptionUpdateType): void {
const {target, scope, observe, config} = subscriptionConfig;
// console.log('[@owservable] -> OwservableClient updateSubscription: ${target}`);
let store: AStore = this._stores.get(target);
if (store) {
store.config = config;
} else {
store = storeFactory(scope, observe, target);
this._stores.set(target, store);
const subscription: Subscription = store.subscribe({
next: async (m: any): Promise<void> => {
if (!this.isValidTarget(target)) return;
const process: Function = DataMiddlewareMap.getMiddleware(observe);
if (!process) return this.next(m);
const r: any = await process(m, this._connectionManager.user);
return this.next(r);
},
error: (e: any): void => this.error(e),
complete: (): void => this.complete()
});
this._subscriptions.set(target, subscription);
store.config = config;
}
this.sendDebugTargets('updateSubscription', target);
}
private isValidTarget(target: string): boolean {
if (!this._stores) return false;
const targets: string[] = Array.from(this._stores.keys());
return includes(targets, target);
}
private sendDebugTargets(event: string, target: string) {
if (!this._stores) return false;
const targets: string[] = Array.from(this._stores.keys());
this.next({
type: 'debug', //
id: new Date().getTime(),
payload: {
event,
target,
availableTargets: join(targets, ', ')
}
});
}
private clearSubscriptions(): void {
if (this._subscriptions) {
const subscriptionsKeys = this._subscriptions.keys();
for (const subscriptionKey of subscriptionsKeys) {
this._subscriptions.get(subscriptionKey)?.unsubscribe();
}
this._subscriptions.clear();
}
this._subscriptions = null;
if (this._stores) {
const storesKeys = this._stores.keys();
for (const storeKey of storesKeys) {
this._stores.get(storeKey)?.destroy();
}
this._stores.clear();
}
this._stores = null;
this.sendDebugTargets('clearSubscriptions', '*');
}
}
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