46 lines
1.3 KiB
TypeScript
46 lines
1.3 KiB
TypeScript
import {Injectable} from '@angular/core';
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import {Http} from "@angular/http";
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import {Observable} from "rxjs/Observable";
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import {Location} from "@angular/common";
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@Injectable()
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export class SelfUpdaterService {
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private appRevision: number = 0;
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private initFailed: boolean = false;
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constructor(
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private httpService: Http,
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private locationService: Location,
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) {
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this.getDeployedRevision().subscribe(
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result => this.appRevision = result,
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() => {
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console.log(
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"%c Couldn't load initial revision data from server. Self update disabled.",
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"background: #222; color: #bada55;"
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);
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this.initFailed = true;
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}
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);
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}
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private getDeployedRevision(): Observable<number> {
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return this.httpService.get(this.locationService.prepareExternalUrl("/revision.json")).map(result => result.json());
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}
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public checkAndReloadIfNecessary() {
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if (!this.initFailed) {
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this.getDeployedRevision().subscribe(
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result => {
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if (result > this.appRevision) {
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document.location.reload(true);
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}
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},
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() => {}
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);
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}
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}
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}
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