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34 lines
1.1 KiB
34 lines
1.1 KiB
3 years ago
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import { Aggregation } from './types';
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import * as _ from 'lodash';
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export function filterMetricListByAlias(list: any[], alias: string | undefined, option: string): any[] {
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const filteredSeries = _.filter(list, serie => serie.alias === alias);
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if(filteredSeries.length === 0) {
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throw new Error(`${option}: Can't find metric for ${alias} name.`);
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}
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if(filteredSeries.length > 1) {
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throw new Error(`${option}: Get ${filteredSeries.length} metrics for ${alias} name. Please choose one.`);
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}
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return filteredSeries;
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}
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export function getAggregatedValueFromSerie(serie: any, aggregation = Aggregation.LAST): number | null {
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// series types { datapoints: [number, number][]}
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if(serie === undefined) {
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return null;
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}
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if(serie.datapoints.length === 0) {
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return null;
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}
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switch(aggregation) {
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case Aggregation.LAST:
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const lastRow = _.last((serie.datapoints as [number, number][]));
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// [0] because it is Grafan series. So 0 idx for values, 1 idx for timestamps
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// @ts-ignore
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return !_.isEmpty(lastRow) ? lastRow[0] : null;
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default:
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throw new Error(`Unknown aggregation type: ${aggregation}`)
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}
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}
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