convert timestamps to dates

package.json

@@ -17,6 +17,7 @@
     "fast-csv": "^2.5.0",
     "lodash": "^4.17.21",
     "moment": "^2.29.4",
+    "moment-timezone": "^0.5.40",
     "nodemon": "^2.0.20",
     "ts-loader": "^9.4.2",
     "typescript": "^4.9.4",

src/models/target.ts

@@ -1,8 +0,0 @@
-import { DataSourceSettings, PanelModel } from '../types';
-
-export class Target {
-  constructor(
-    public panel: PanelModel,
-    public datasource: DataSourceSettings,
-  ) {}
-}

src/routes/tasks.ts

@@ -14,6 +14,7 @@ type TRequest = {
   body: {
     task: ExportTask,
     url: string,
+    timeZoneName: string,
   },
 };
 
@@ -67,7 +68,7 @@ async function addTask(req: TRequest, res) {
   }
 
   const exporter = exporterFactory.getExporter();
-  exporter.export(task, datasourceUrl);
+  exporter.export(task, datasourceUrl, body.timeZoneName);
   res.status(200).send(`Export process started`);
 }
 

src/services/exporter.ts

@@ -1,7 +1,6 @@
-import { Target } from '../models/target';
 import { URL } from 'url';
 import { apiKeys } from '../config';
-import { promisify } from '../utils';
+import { promisify, toIsoString } from '../utils';
 import { DashboardQuery, ExportProgress, ExportStatus, ExportTask } from '../types';
 
 import { QueryConfig, queryByConfig } from '@corpglory/tsdb-kit';
@@ -27,7 +26,7 @@ const DEFAULT_PROGRESS = {
 export class Exporter {
   private _task: ExportTask;
 
-  public async export(task: ExportTask, datasourceUrl: string) {
+  public async export(task: ExportTask, datasourceUrl: string, timeZoneName: string) {
     try {
       this._task = _.cloneDeep(task);
       this._task.id = uuidv4();
@@ -36,22 +35,17 @@ export class Exporter {
       this._validateQueries(task.queries);
       this._validateDatasourceUrl(datasourceUrl);
 
-      const targets = task.queries.map((query: DashboardQuery) => new Target(
-        query.panel,
-        query.datasource,
-      ));
-
       await this._updateProgress();
 
-      const queryConfigs = targets.map(
-        target =>
+      const queryConfigs = task.queries.map(
+        query =>
           new QueryConfig(
             QueryType.GRAFANA,
             {
-              ...target.datasource,
-              url: datasourceUrl
+              ...query.datasource,
+              url: datasourceUrl,
             },
-            target.panel.targets
+            [query.target]
           )
       );
 
@@ -76,12 +70,31 @@ export class Exporter {
 
           const datasourceMetrics = await queryByConfig(queryConfig, datasourceUrl, from, to, apiKey);
 
-          columns = datasourceMetrics.columns;
-          values = datasourceMetrics.values;
+          if(_.isEmpty(columns)) {
+            columns = datasourceMetrics.columns;
+          } else {
+            columns = _.concat(columns, datasourceMetrics.columns.slice(1));
+          }
+
+          if(_.isEmpty(values)) {
+            values = datasourceMetrics.values;
+          } else {
+            if(values.length !== datasourceMetrics.values.length) {
+              throw new Error(`All queries should return rows of the same lengths`);
+            }
+            for(const rowIdx in values) {
+              if(datasourceMetrics.values[rowIdx][0] !== values[rowIdx][0]) {
+                throw new Error('Queries should return the same timestamps');
+              }
+              values[rowIdx] = _.concat(values[rowIdx], datasourceMetrics.values[rowIdx].slice(1));
+            }
+          }
         }
 
+        values = values.map((row: number[]) => [toIsoString(row[0], timeZoneName), ...row.slice(1)]);
+
         if(columns.length > 0) {
-          this._writeCsv(stream, { columns, values, });
+          this._writeCsv(stream, { columns, values });
         }
         await this._updateProgress({ status: ExportStatus.EXPORTING, progress: (day + 1) / days });
 
@@ -137,8 +150,8 @@ export class Exporter {
       if(_.isEmpty(query.datasource)) {
         throw new Error('all queries should have a `datasource` field');
       }
-      if(_.isEmpty(query.panel.targets)) {
-        throw new Error('all queries should have a `panel` field with non-empty `targets` field');
+      if(_.isEmpty(query.target)) {
+        throw new Error('all queries should have a `target` field');
       }
     }
   }

src/types.ts

@@ -105,8 +105,9 @@ export type ExportTask = {
   id?: string;
 };
 
-export type DashboardQuery = DataQuery & {
+export type DashboardQuery = {
   selected: boolean;
+  target: DataQuery;
   panel: PanelModel;
   datasource: DataSourceSettings;
 };

src/utils.ts

@@ -1,3 +1,5 @@
+import * as moment from 'moment-timezone';
+
 export async function promisify(method: (...params: any[]) => Promise<any> | void, ...params: any[]) {
   return new Promise((resolve, reject) => {
     method(...params, (err, result) => {
@@ -9,3 +11,7 @@ export async function promisify(method: (...params: any[]) => Promise<any> | voi
     })
   });
 }
+
+export function toIsoString(msTimestamp: number, timeZone: string): string {
+  return moment.tz(msTimestamp, timeZone).format('YYYY-MM-DD HH:mm:ssZ').replace(/:00$/, '');
+}

yarn.lock

@@ -1046,7 +1046,14 @@ minimatch@^3.1.2:
   dependencies:
     brace-expansion "^1.1.7"
 
-moment@^2.22.2, moment@^2.29.4:
+moment-timezone@^0.5.40:
+  version "0.5.40"
+  resolved "https://registry.yarnpkg.com/moment-timezone/-/moment-timezone-0.5.40.tgz#c148f5149fd91dd3e29bf481abc8830ecba16b89"
+  integrity sha512-tWfmNkRYmBkPJz5mr9GVDn9vRlVZOTe6yqY92rFxiOdWXbjaR0+9LwQnZGGuNR63X456NqmEkbskte8tWL5ePg==
+  dependencies:
+    moment ">= 2.9.0"
+
+"moment@>= 2.9.0", moment@^2.22.2, moment@^2.29.4:
   version "2.29.4"
   resolved "https://registry.yarnpkg.com/moment/-/moment-2.29.4.tgz#3dbe052889fe7c1b2ed966fcb3a77328964ef108"
   integrity sha512-5LC9SOxjSc2HF6vO2CyuTDNivEdoz2IvyJJGj6X8DJ0eFyfszE0QiEd+iXmBvUP3WHxSjFH/vIsA0EN00cgr8w==