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import sessionStorage from '../sessionStorage';
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import { longFromInts } from './bin_utils';
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import { nextRandomInt } from '../../helpers/random';
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export class TimeManager {
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private lastMessageId = [0, 0];
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private timeOffset = 0;
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constructor() {
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sessionStorage.get('server_time_offset').then((to: any) => {
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if(to) {
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this.timeOffset = to;
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}
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});
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}
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public generateId(): string {
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const timeTicks = Date.now(),
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timeSec = Math.floor(timeTicks / 1000) + this.timeOffset,
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timeMSec = timeTicks % 1000,
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random = nextRandomInt(0xFFFF);
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let messageId = [timeSec, (timeMSec << 21) | (random << 3) | 4];
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if(this.lastMessageId[0] > messageId[0] ||
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this.lastMessageId[0] === messageId[0] && this.lastMessageId[1] >= messageId[1]) {
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messageId = [this.lastMessageId[0], this.lastMessageId[1] + 4];
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}
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this.lastMessageId = messageId;
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const ret = longFromInts(messageId[0], messageId[1]);
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//console.log('[TimeManager]: Generated msg id', messageId, this.timeOffset, ret);
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return ret
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}
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public applyServerTime(serverTime: number, localTime?: number) {
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localTime = (localTime || Date.now()) / 1000 | 0;
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const newTimeOffset = serverTime - localTime;
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const changed = Math.abs(this.timeOffset - newTimeOffset) > 10;
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sessionStorage.set({
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server_time_offset: newTimeOffset
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});
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this.lastMessageId = [0, 0];
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this.timeOffset = newTimeOffset;
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//console.log('[TimeManager]: Apply server time', serverTime, localTime, newTimeOffset, changed);
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return changed;
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}
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}
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export default new TimeManager();
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