Function uploadHandler

src/dashboard/routes.ts:69–140

(client: DocumentEngineClient, req: Request, res: Response)

 * File upload handler
 */
export async function uploadHandler(client: DocumentEngineClient, req: Request, res: Response) {
  try {
    if (!req.files || req.files.length === 0) {
      return res.status(400).send(errorTemplate('No files were uploaded.'));
    }

    const results = [];
    const files = Array.isArray(req.files) ? req.files : Object.values(req.files).flat();

    for (const file of files) {
      try {
        // Create FormData for file upload
        const formData = new FormData();
        const blob = new Blob([file.buffer], { type: 'application/octet-stream' });
        formData.append('file', blob, file.originalname);

        // Upload file to Document Engine with proper content type
        // @ts-expect-error We can pass FormData to this endpoint.
        const response = await client['upload-document']({}, formData, {
          headers: {
            'Content-Type': 'multipart/form-data',
          },
        });

        const documentId = response.data.data?.document_id;
        if (!documentId) {
          throw new Error('No document ID returned from upload');
        }

        results.push({
          filename: file.originalname,
          success: true,
          documentId: documentId,
        });
      } catch (fileError) {
        results.push({
          filename: file.originalname,
          success: false,
          error: fileError instanceof Error ? fileError.message : 'Upload failed',
        });
      }
    }

    // Transform results to match the expected type for the template
    const templateResults = results.map(result => {
      if ('documentId' in result) {
        return {
          filename: result.filename as string,
          success: result.success,
        };
      } else {
        return {
          filename: result.filename as string,
          success: result.success,
          error: result.error,
        };
      }
    });