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import { Injectable } from '@angular/core';
import _ from 'lodash';
import { Icons } from '../enum/icons.enum';
import { NotificationType } from '../enum/notification-type.enum';
import { CdNotificationConfig } from '../models/cd-notification';
import {
AlertmanagerAlert,
AlertmanagerNotificationAlert,
PrometheusCustomAlert
} from '../models/prometheus-alerts';
import { NotificationService } from './notification.service';
@Injectable({
providedIn: 'root'
})
export class PrometheusAlertFormatter {
constructor(private notificationService: NotificationService) {}
sendNotifications(notifications: CdNotificationConfig[]) {
notifications.forEach((n) => this.notificationService.show(n));
}
convertToCustomAlerts(
alerts: (AlertmanagerNotificationAlert | AlertmanagerAlert)[]
): PrometheusCustomAlert[] {
return _.uniqWith(
alerts.map((alert) => {
return {
status: _.isObject(alert.status)
? (alert as AlertmanagerAlert).status.state
: this.getPrometheusNotificationStatus(alert as AlertmanagerNotificationAlert),
name: alert.labels.alertname,
url: alert.generatorURL,
description: alert.annotations.description,
fingerprint: _.isObject(alert.status) && (alert as AlertmanagerAlert).fingerprint
};
}),
_.isEqual
) as PrometheusCustomAlert[];
}
/*
* This is needed because NotificationAlerts don't use 'active'
*/
private getPrometheusNotificationStatus(alert: AlertmanagerNotificationAlert): string {
const state = alert.status;
return state === 'firing' ? 'active' : state;
}
convertAlertToNotification(alert: PrometheusCustomAlert): CdNotificationConfig {
return new CdNotificationConfig(
this.formatType(alert.status),
`${alert.name} (${alert.status})`,
this.appendSourceLink(alert, alert.description),
undefined,
'Prometheus'
);
}
private formatType(status: string): NotificationType {
const types = {
error: ['firing', 'active'],
info: ['suppressed', 'unprocessed'],
success: ['resolved']
};
return NotificationType[_.findKey(types, (type) => type.includes(status))];
}
private appendSourceLink(alert: PrometheusCustomAlert, message: string): string {
return `${message} <a href="${alert.url}" target="_blank"><i class="${Icons.lineChart}"></i></a>`;
}
}
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