Devenv testdata dashboards (#12615)

* devenv: working on dev env setup & dashboards

* devenv: refactored testdata app to a built in datasource instead, and moved dashboards to a devenv provisioned dashboards

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

@@ -0,0 +1,70 @@
+import _ from 'lodash';
+
+import { QueryCtrl } from 'app/plugins/sdk';
+import moment from 'moment';
+
+export class TestDataQueryCtrl extends QueryCtrl {
+  static templateUrl = 'partials/query.editor.html';
+
+  scenarioList: any;
+  scenario: any;
+  newPointValue: number;
+  newPointTime: any;
+  selectedPoint: any;
+
+  /** @ngInject **/
+  constructor($scope, $injector, private backendSrv) {
+    super($scope, $injector);
+
+    this.target.scenarioId = this.target.scenarioId || 'random_walk';
+    this.scenarioList = [];
+    this.newPointTime = moment();
+    this.selectedPoint = { text: 'Select point', value: null };
+  }
+
+  getPoints() {
+    return _.map(this.target.points, (point, index) => {
+      return {
+        text: moment(point[1]).format('MMMM Do YYYY, H:mm:ss') + ' : ' + point[0],
+        value: index,
+      };
+    });
+  }
+
+  pointSelected(option) {
+    this.selectedPoint = option;
+  }
+
+  deletePoint() {
+    this.target.points.splice(this.selectedPoint.value, 1);
+    this.selectedPoint = { text: 'Select point', value: null };
+    this.refresh();
+  }
+
+  addPoint() {
+    this.target.points = this.target.points || [];
+    this.target.points.push([this.newPointValue, this.newPointTime.valueOf()]);
+    this.target.points = _.sortBy(this.target.points, p => p[1]);
+    this.refresh();
+  }
+
+  $onInit() {
+    return this.backendSrv.get('/api/tsdb/testdata/scenarios').then(res => {
+      this.scenarioList = res;
+      this.scenario = _.find(this.scenarioList, { id: this.target.scenarioId });
+    });
+  }
+
+  scenarioChanged() {
+    this.scenario = _.find(this.scenarioList, { id: this.target.scenarioId });
+    this.target.stringInput = this.scenario.stringInput;
+
+    if (this.target.scenarioId === 'manual_entry') {
+      this.target.points = this.target.points || [];
+    } else {
+      delete this.target.points;
+    }
+
+    this.refresh();
+  }
+}