grafana/public/app/plugins/datasource/testdata/datasource.ts

import _ from 'lodash';

class TestDataDatasource {
  id: any;

  /** @ngInject */
  constructor(instanceSettings, private backendSrv, private $q) {
    this.id = instanceSettings.id;
  }

  query(options) {
    var queries = _.filter(options.targets, item => {
      return item.hide !== true;
    }).map(item => {
      return {
        refId: item.refId,
        scenarioId: item.scenarioId,
        intervalMs: options.intervalMs,
        maxDataPoints: options.maxDataPoints,
        stringInput: item.stringInput,
        points: item.points,
        alias: item.alias,
        datasourceId: this.id,
      };
    });

    if (queries.length === 0) {
      return this.$q.when({ data: [] });
    }

    return this.backendSrv
      .post('/api/tsdb/query', {
        from: options.range.from.valueOf().toString(),
        to: options.range.to.valueOf().toString(),
        queries: queries,
      })
      .then(res => {
        var data = [];

        if (res.results) {
          _.forEach(res.results, queryRes => {
            for (const series of queryRes.series) {
              data.push({
                target: series.name,
                datapoints: series.points,
              });
            }
          });
        }

        return { data: data };
      });
  }

  annotationQuery(options) {
    return this.backendSrv.get('/api/annotations', {
      from: options.range.from.valueOf(),
      to: options.range.to.valueOf(),
      limit: options.limit,
      type: options.type,
    });
  }
}

export { TestDataDatasource };