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| 1 | +import { EventBus } from '@/event-bus'; |
| 2 | +import { SIGNALR_CONFIG } from '../config'; |
| 3 | +import { HubConnection, HubConnectionBuilder, HubConnectionState } from '@microsoft/signalr'; |
| 4 | + |
| 5 | +/** |
| 6 | + * SignalR API abstraction layer communication. |
| 7 | + * Configures/manages hub connections (typescript singleton pattern). |
| 8 | + */ |
| 9 | +class SignalRService { |
| 10 | + private _hubConnection: HubConnection; |
| 11 | + private static _signalRService: SignalRService; |
| 12 | + |
| 13 | + private constructor() { |
| 14 | + this.createConnection(); |
| 15 | + this.registerOnServerEvents(); |
| 16 | + } |
| 17 | + |
| 18 | + public static get Instance(): SignalRService { |
| 19 | + return this._signalRService || (this._signalRService = new this()); |
| 20 | + } |
| 21 | + |
| 22 | + public startConnection(): void { |
| 23 | + if (this._hubConnection.state === HubConnectionState.Disconnected) { |
| 24 | + this._hubConnection |
| 25 | + .start() |
| 26 | + .catch((e) => console.error(e)); |
| 27 | + } |
| 28 | + } |
| 29 | + |
| 30 | + private createConnection(): void { |
| 31 | + this._hubConnection = new HubConnectionBuilder() |
| 32 | + .withUrl(SIGNALR_CONFIG.baseUrl) |
| 33 | + .build(); |
| 34 | + } |
| 35 | + |
| 36 | + private hubToastMessage( |
| 37 | + message: string, |
| 38 | + title: string = SIGNALR_CONFIG.messageTitle, |
| 39 | + delay: number = SIGNALR_CONFIG.messageDelay |
| 40 | + ): void { |
| 41 | + setTimeout(() => { |
| 42 | + EventBus.$snotify.info(message, title); |
| 43 | + }, delay); |
| 44 | + } |
| 45 | + |
| 46 | + private registerOnServerEvents(): void { |
| 47 | + this._hubConnection.on(SIGNALR_CONFIG.events.login, () => { |
| 48 | + this.hubToastMessage('A user has logged in'); |
| 49 | + }); |
| 50 | + |
| 51 | + this._hubConnection.on(SIGNALR_CONFIG.events.logout, () => { |
| 52 | + this.hubToastMessage('A user has logged out'); |
| 53 | + }); |
| 54 | + |
| 55 | + this._hubConnection.on(SIGNALR_CONFIG.events.closeConnections, (reason: string) => { |
| 56 | + this._hubConnection |
| 57 | + .stop() |
| 58 | + .then(() => { |
| 59 | + this.hubToastMessage(`Hub closed (${reason})`); |
| 60 | + }); |
| 61 | + }); |
| 62 | + } |
| 63 | +} |
| 64 | + |
| 65 | +export const SignalRApi = SignalRService.Instance; |
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