Refactor File Download Logic and Streamline Test Suite (#9281)

Closes #9277 

## Summary of Changes
- Updated the file-download functionality to use the `saveAs` method
from the `file-saver` library, ensuring a more reliable and consistent
implementation.
- Removed redundant tests to streamline the test suite and reduce
maintenance overhead.

## Testing Performed
- [x] Verified that exporting the view to a CSV file works as expected.

packages/twenty-front/src/modules/activities/files/utils/downloadFile.ts

@@ -1,3 +1,4 @@
+import { saveAs } from 'file-saver';
 import { getFileAbsoluteURI } from '~/utils/file/getFileAbsoluteURI';
 
 export const downloadFile = (fullPath: string, fileName: string) => {
@@ -8,13 +9,6 @@ export const downloadFile = (fullPath: string, fileName: string) => {
         : Promise.reject('Failed downloading file'),
     )
     .then((blob) => {
-      const url = window.URL.createObjectURL(blob);
-      const a = document.createElement('a');
-      a.style.display = 'none';
-      a.href = url;
-      a.download = fileName;
-      document.body.appendChild(a);
-      a.click();
-      window.URL.revokeObjectURL(url);
+      saveAs(blob, fileName);
     });
 };

packages/twenty-front/src/modules/object-record/record-index/export/hooks/__tests__/useExportRecords.test.ts

@@ -2,32 +2,10 @@ import { FieldMetadata } from '@/object-record/record-field/types/FieldMetadata'
 import { ColumnDefinition } from '@/object-record/record-table/types/ColumnDefinition';
 
 import { RelationDefinitionType } from '~/generated-metadata/graphql';
-import {
-  csvDownloader,
-  displayedExportProgress,
-  download,
-  generateCsv,
-} from '../useExportRecords';
+import { displayedExportProgress, generateCsv } from '../useExportRecords';
 
 jest.useFakeTimers();
 
-describe('download', () => {
-  it('creates a download link and clicks it', () => {
-    const link = document.createElement('a');
-    document.createElement = jest.fn().mockReturnValue(link);
-    const appendChild = jest.spyOn(document.body, 'appendChild');
-    const click = jest.spyOn(link, 'click');
-
-    URL.createObjectURL = jest.fn().mockReturnValue('fake-url');
-    download(new Blob(['test'], { type: 'text/plain' }), 'test.txt');
-
-    expect(appendChild).toHaveBeenCalledWith(link);
-    expect(link.href).toEqual('http://localhost/fake-url');
-    expect(link.getAttribute('download')).toEqual('test.txt');
-    expect(click).toHaveBeenCalledTimes(1);
-  });
-});
-
 describe('generateCsv', () => {
   it('generates a csv with formatted headers', async () => {
     const columns = [
@@ -58,32 +36,6 @@ describe('generateCsv', () => {
   });
 });
 
-describe('csvDownloader', () => {
-  it('downloads a csv', () => {
-    const filename = 'test.csv';
-    const data = {
-      rows: [
-        { id: 1, name: 'John' },
-        { id: 2, name: 'Alice' },
-      ],
-      columns: [],
-      objectNameSingular: '',
-    };
-
-    const link = document.createElement('a');
-    document.createElement = jest.fn().mockReturnValue(link);
-    const createObjectURL = jest.spyOn(URL, 'createObjectURL');
-
-    csvDownloader(filename, data);
-
-    expect(link.getAttribute('download')).toEqual('test.csv');
-    expect(createObjectURL).toHaveBeenCalledWith(expect.any(Blob));
-    expect(createObjectURL).toHaveBeenCalledWith(
-      expect.objectContaining({ type: 'text/csv' }),
-    );
-  });
-});
-
 describe('displayedExportProgress', () => {
   it.each([
     [undefined, undefined, 'percentage', 'Export'],

packages/twenty-front/src/modules/object-record/record-index/export/hooks/useExportRecords.ts

@@ -10,21 +10,12 @@ import {
 } from '@/object-record/record-index/export/hooks/useExportFetchRecords';
 import { ColumnDefinition } from '@/object-record/record-table/types/ColumnDefinition';
 import { ObjectRecord } from '@/object-record/types/ObjectRecord';
+import { saveAs } from 'file-saver';
 import { RelationDefinitionType } from '~/generated-metadata/graphql';
 import { FieldMetadataType } from '~/generated/graphql';
 import { isDefined } from '~/utils/isDefined';
 import { isUndefinedOrNull } from '~/utils/isUndefinedOrNull';
 
-export const download = (blob: Blob, filename: string) => {
-  const url = URL.createObjectURL(blob);
-  const link = document.createElement('a');
-  link.href = url;
-  link.setAttribute('download', filename);
-  document.body.appendChild(link);
-  link.click();
-  link.parentNode?.removeChild(link);
-};
-
 type GenerateExportOptions = {
   columns: ColumnDefinition<FieldMetadata>[];
   rows: object[];
@@ -128,7 +119,7 @@ export const displayedExportProgress = (progress?: ExportProgress): string => {
 const downloader = (mimeType: string, generator: GenerateExport) => {
   return (filename: string, data: GenerateExportOptions) => {
     const blob = new Blob([generator(data)], { type: mimeType });
-    download(blob, filename);
+    saveAs(blob, filename);
   };
 };