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import { sendAnalyticWebhook, sendInfoWebhook } from './notification_service';
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import * as _ from 'lodash';
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import * as AnalyticUnit from '../models/analytic_unit_model';
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import { Segment } from '../models/segment_model';
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export class Alert {
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public enabled = true;
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constructor(protected analyticUnit: AnalyticUnit.AnalyticUnit) {};
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public receive(segment: Segment) {
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if(this.enabled) {
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sendAnalyticWebhook(this.analyticUnit.name, segment);
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}
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};
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}
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class PatternAlert extends Alert {
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private lastSentSegment: Segment;
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public receive(segment: Segment) {
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if(this.lastSentSegment === undefined || !segment.equals(this.lastSentSegment) ) {
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this.lastSentSegment = segment;
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if(this.enabled) {
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sendAnalyticWebhook(this.analyticUnit.name, segment);
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}
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}
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}
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};
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class ThresholdAlert extends Alert {
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EXPIRE_PERIOD_MS = 60000;
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lastOccurence = 0;
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public receive(segment: Segment) {
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if(this.lastOccurence === 0) {
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this.lastOccurence = segment.from;
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if(this.enabled) {
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sendAnalyticWebhook(this.analyticUnit.name, segment);
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}
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} else {
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if(segment.from - this.lastOccurence > this.EXPIRE_PERIOD_MS) {
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if(this.enabled) {
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console.log(`time between threshold occurences ${segment.from - this.lastOccurence}ms, send alert`);
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sendAnalyticWebhook(this.analyticUnit.name, segment);
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}
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}
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this.lastOccurence = segment.from;
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}
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}
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}
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export class AlertService {
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private _alerts: { [id: string]: Alert; };
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private _alertingEnable: boolean;
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constructor() {
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this._alerts = {}
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}
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public receiveAlert(analyticUnit: AnalyticUnit.AnalyticUnit, segment: Segment) {
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if(!this._alertingEnable) {
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return;
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}
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let id = analyticUnit.id;
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if(!_.has(this._alerts, id)) {
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this.addAnalyticUnit(analyticUnit);
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}
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this._alerts[id].receive(segment);
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};
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public onStateChange(message: string, optionalInfo = {}) {
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let message_payload = {
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message
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};
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sendInfoWebhook(Object.assign(message_payload, optionalInfo));
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}
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public addAnalyticUnit(analyticUnit: AnalyticUnit.AnalyticUnit) {
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let detector = AnalyticUnit.getDetectorByType(analyticUnit.type);
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let alertsType = {};
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alertsType[AnalyticUnit.DetectorType.THRESHOLD] = ThresholdAlert;
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alertsType[AnalyticUnit.DetectorType.PATTERN] = PatternAlert;
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this._alerts[analyticUnit.id] = new alertsType[detector](analyticUnit);
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}
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public removeAnalyticUnit(analyticUnitId: AnalyticUnit.AnalyticUnitId) {
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delete this._alerts[analyticUnitId];
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}
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public stopAlerting() {
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this._alertingEnable = false;
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this._alerts = {};
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}
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public startAlerting() {
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this._alertingEnable = true;
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}
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}
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