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Add outage notifications system (n-air-app#501)
* add outage notifications system * fix caching, mark as read after clicking notification * clarify comment * make methods private
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| import { Service } from 'services/service'; | ||
| import { NotificationsService, ENotificationType } from 'services/notifications'; | ||
| import { Inject } from 'util/injector'; | ||
| import { JsonrpcService, IJsonRpcRequest } from 'services/jsonrpc'; | ||
| import electron from 'electron'; | ||
|
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| interface IOutageNotification { | ||
| /** | ||
| * Uniquely identifies this message | ||
| */ | ||
| id: string; | ||
|
|
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| /** | ||
| * The body of the message | ||
| */ | ||
| message: string; | ||
|
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| /** | ||
| * If set, clicking the notification will | ||
| * open a browser and navigate to this URL. | ||
| */ | ||
| url?: string; | ||
|
|
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| /** | ||
| * This message should be ignored if disabled is true | ||
| */ | ||
| disabled: boolean; | ||
| } | ||
|
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| // Configuration | ||
| const S3_BUCKET = 'streamlabs-obs'; | ||
| const S3_KEY = 'outage-notification.json'; | ||
| const POLLING_INTERVAL = 5 * 60 * 1000; | ||
|
|
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| export class OutageNotificationsService extends Service { | ||
| @Inject() notificationsService: NotificationsService; | ||
| @Inject() jsonrpcService: JsonrpcService; | ||
|
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| currentMessageId: string = null; | ||
| currentNotificationId: number = null; | ||
|
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| init() { | ||
| this.checkForNotification(); | ||
| setInterval(() => this.checkForNotification(), POLLING_INTERVAL); | ||
| } | ||
|
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| private pushNotification(message: string, url?: string) { | ||
| let action: IJsonRpcRequest; | ||
|
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| action = this.jsonrpcService.createRequest( | ||
| Service.getResourceId(this.notificationsService), | ||
| 'showNotifications' | ||
| ); | ||
|
|
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| if (url) { | ||
| action = this.jsonrpcService.createRequest( | ||
| Service.getResourceId(this), | ||
| 'openBrowserWindow', | ||
| url | ||
| ); | ||
| } | ||
|
|
||
| return this.notificationsService.push({ | ||
| message, | ||
| type: ENotificationType.WARNING, | ||
| lifeTime: -1, | ||
| action | ||
| }); | ||
| } | ||
|
|
||
| private openBrowserWindow(url: string) { | ||
| electron.remote.shell.openExternal(url); | ||
| } | ||
|
|
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| private async checkForNotification() { | ||
| const msg = await this.fetchMessageJson(); | ||
|
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| // There are no urgent messages to display to the user | ||
| if (!msg || msg.disabled) { | ||
| this.clearNotification(); | ||
| return; | ||
| } | ||
|
|
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| // The current message is still in effect | ||
| if (this.currentMessageId === msg.id) return; | ||
|
|
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| // There is a new message to display to the user | ||
| const notification = this.pushNotification(msg.message, msg.url); | ||
| this.currentMessageId = msg.id; | ||
| this.currentNotificationId = notification.id; | ||
| } | ||
|
|
||
| private clearNotification() { | ||
| if (this.currentMessageId) this.currentMessageId = null; | ||
| if (this.currentNotificationId) { | ||
| this.notificationsService.markAsRead(this.currentNotificationId); | ||
| this.currentNotificationId = null; | ||
| } | ||
| } | ||
|
|
||
| private async fetchMessageJson(): Promise<IOutageNotification> { | ||
| const req = new Request(this.messageUrl); | ||
| const headers = new Headers(); | ||
| headers.append('Pragma', 'no-cache'); | ||
| headers.append('Cache-Control', 'no-cache'); | ||
|
|
||
| try { | ||
| const response = await fetch(req, { headers }); | ||
|
|
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| if (response.ok) { | ||
| return await response.json(); | ||
| } | ||
|
|
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| return; | ||
| } catch (e) { | ||
| return; | ||
| } | ||
| } | ||
|
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| private get messageUrl() { | ||
| return `https://s3-us-west-2.amazonaws.com/${S3_BUCKET}/${S3_KEY}`; | ||
| } | ||
|
|
||
| } |