@hsaadawy/ngx-chat
Version:
61 lines • 11.2 kB
JavaScript
import { __awaiter } from "tslib";
import { xml } from '@xmpp/client';
import { BehaviorSubject, of } from 'rxjs';
import { catchError, first, mergeMap, map, timeout } from 'rxjs/operators';
import { AbstractXmppPlugin } from './abstract-xmpp-plugin';
/**
* Request time of entities via XEP-0202.
*/
export class EntityTimePlugin extends AbstractXmppPlugin {
constructor(xmppChatAdapter, serviceDiscoveryPlugin, logService) {
super();
this.xmppChatAdapter = xmppChatAdapter;
this.serviceDiscoveryPlugin = serviceDiscoveryPlugin;
this.logService = logService;
this.serverSupportsTime$ = new BehaviorSubject('unknown');
this.serverTime$ = new BehaviorSubject(null);
}
onBeforeOnline() {
return __awaiter(this, void 0, void 0, function* () {
const serverSupportsTimeRequest = yield this.serviceDiscoveryPlugin.supportsFeature(this.xmppChatAdapter.chatConnectionService.userJid.domain, 'urn:xmpp:time');
if (serverSupportsTimeRequest) {
const sharedUtcTimeStamp = yield this.requestTime(this.xmppChatAdapter.chatConnectionService.userJid.domain);
this.serverTime$.next(sharedUtcTimeStamp);
this.serverSupportsTime$.next(true);
}
else {
this.serverSupportsTime$.next(false);
}
});
}
onOffline() {
this.serverSupportsTime$.next('unknown');
this.serverTime$.next(null);
}
/**
* Returns a non-client-specific timestamp if server supports XEP-0202. Fallback to local timestamp in case of missing support.
*/
getNow() {
return __awaiter(this, void 0, void 0, function* () {
const calculateNowViaServerTime$ = this.serverTime$.pipe(map(reference => this.calculateNow(reference)), first());
return yield this.serverSupportsTime$.pipe(timeout(5000), first(supportsServerTime => supportsServerTime !== 'unknown'), mergeMap(supportsServerTime => supportsServerTime ? calculateNowViaServerTime$ : of(Date.now())), catchError(() => of(Date.now()))).toPromise();
});
}
calculateNow(reference) {
return reference.utcTimestamp + (performance.now() - reference.localReference);
}
requestTime(jid) {
var _a;
return __awaiter(this, void 0, void 0, function* () {
const response = yield this.xmppChatAdapter.chatConnectionService.sendIq(xml('iq', { type: 'get', to: jid }, xml('time', { xmlns: 'urn:xmpp:time' })));
const utcString = (_a = response.getChild('time', 'urn:xmpp:time')) === null || _a === void 0 ? void 0 : _a.getChildText('utc');
if (!utcString) {
const message = 'invalid time response';
this.logService.error(message, response.toString());
throw new Error(message);
}
return { utcTimestamp: Date.parse(utcString), localReference: performance.now() };
});
}
}
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Fallback to local timestamp in case of missing support.\r\n     */\r\n    async getNow(): Promise<number> {\r\n        const calculateNowViaServerTime$ = this.serverTime$.pipe(map(reference => this.calculateNow(reference)), first());\r\n        return await this.serverSupportsTime$.pipe(\r\n            timeout(5000),\r\n            first(supportsServerTime => supportsServerTime !== 'unknown'),\r\n            mergeMap(supportsServerTime => supportsServerTime ? calculateNowViaServerTime$ : of(Date.now())),\r\n            catchError(() => of(Date.now())),\r\n        ).toPromise();\r\n    }\r\n\r\n    private calculateNow(reference: TimeReference): number {\r\n        return reference.utcTimestamp + (performance.now() - reference.localReference);\r\n    }\r\n\r\n    async requestTime(jid: string): Promise<TimeReference> {\r\n        const response = await this.xmppChatAdapter.chatConnectionService.sendIq(\r\n            xml('iq', {type: 'get', to: jid},\r\n                xml('time', {xmlns: 'urn:xmpp:time'}),\r\n            ),\r\n        );\r\n        const utcString = response.getChild('time', 'urn:xmpp:time')?.getChildText('utc');\r\n        if (!utcString) {\r\n            const message = 'invalid time response';\r\n            this.logService.error(message, response.toString());\r\n            throw new Error(message);\r\n        }\r\n        return {utcTimestamp: Date.parse(utcString), localReference: performance.now()};\r\n    }\r\n\r\n}\r\n"]}