proper way to delete csv and json

src/routes/tasks.ts

@@ -92,10 +92,11 @@ async function addTask(req: TRequest, res) {
 }
 
 async function deleteTask(req, res) {
-  let taskId = req.body.taskId;
+  const taskId = req.body.taskId;
-  let csvFilePath = path.join(CSV_PATH, `${taskId}.csv`);
+  const jsonFilePath = path.join(CSV_PATH, `${taskId}.json`);
-  let jsonFilePath = path.join(CSV_PATH, `${taskId}.json`);
+  const data = fs.readFileSync(jsonFilePath, 'utf8');
-
+  const csvName = JSON.parse(data)['filename'];
+  const csvFilePath = path.join(CSV_PATH, `${csvName}.csv`);
   if(fs.existsSync(csvFilePath)) {
     fs.unlink(csvFilePath, err => console.error(err));
   }

src/services/exporter.ts

@@ -117,15 +117,15 @@ export class Exporter {
     const csvStream = csv.createWriteStream({ headers: true, delimiter: this._task.csvDelimiter })
       .on('error', async e => await this._updateProgress({ status: ExportStatus.ERROR, errorMessage: e.message }));
 
-    const writableStream = fs.createWriteStream(this._getFilePath('csv'));
+    const writableStream = fs.createWriteStream(this._getCsvFilePath());
 
     csvStream.pipe(writableStream);
     writableStream.on('finish', async () => {
       if(this._task.progress.status !== ExportStatus.ERROR) {
-        console.log(`Everything is written to ${this._getFilename('csv')}`);
+        console.log(`Everything is written to ${this._getCsvFilename()}`);
         await this._updateProgress({ status: ExportStatus.FINISHED, progress: 1 });
       } else {
-        console.log(`${this._getFilename('csv')} export is finished with error`);
+        console.log(`${this._getCsvFilename()} export is finished with error`);
       }
     });
 
@@ -141,7 +141,7 @@ export class Exporter {
         progress: _.assign(this._task.progress, progress, { time }),
       };
 
-      await promisify(fs.writeFile)(this._getFilePath('json'), JSON.stringify(data), 'utf8');
+      await promisify(fs.writeFile)(this._getJsonFilePath(), JSON.stringify(data), 'utf8');
     } catch(err) {
       console.error(err);
       throw new Error('Can`t write file');
@@ -174,12 +174,16 @@ export class Exporter {
     }
   }
 
-  private _getFilename(extension: string): string {
+  private _getCsvFilename(): string {
-    return `${this._task.filename}.${extension}`;
+    return `${this._task.filename}.csv`;
   }
 
-  private _getFilePath(extension: string): string {
+  private _getCsvFilePath(): string {
-    let filename = this._getFilename(extension);
+    let filename = this._getCsvFilename();
     return path.join(CSV_PATH, filename);
   }
+
+  private _getJsonFilePath(): string {
+    return path.join(CSV_PATH, `${this._task.id}.json`);
+  }
 }