addImageWatermark method

Future<ApiResponse> addImageWatermark(File file, File watermarkImage, ImageWatermarkOptions options)

Add an image watermark to a PDF

file PDF file to watermark watermarkImage Image file to use as watermark options Image watermark options

Implementation

Future<ApiResponse> addImageWatermark(
  File file,
  File watermarkImage,
  ImageWatermarkOptions options,
) async {
  // Create a multipart request manually
  final uri = Uri.parse('${ScanProConfig.apiUrl}/api/pdf/watermark');
  final request = http.MultipartRequest('POST', uri);

  // Add API key header
  request.headers.addAll({'x-api-key': ScanProConfig.apiKey});

  // Add PDF file
  final pdfFileName = file.path.split('/').last;
  final pdfBytes = await file.readAsBytes();

  request.files.add(
    http.MultipartFile.fromBytes(
      'file',
      pdfBytes,
      filename: pdfFileName,
      contentType: MediaType.parse('application/pdf'),
    ),
  );

  // Add watermark image file
  final imageFileName = watermarkImage.path.split('/').last;
  final imageBytes = await watermarkImage.readAsBytes();

  // Determine image content type
  String imageContentType = 'image/jpeg';
  if (imageFileName.toLowerCase().endsWith('.png')) {
    imageContentType = 'image/png';
  } else if (imageFileName.toLowerCase().endsWith('.svg')) {
    imageContentType = 'image/svg+xml';
  }

  request.files.add(
    http.MultipartFile.fromBytes(
      'watermarkImage',
      imageBytes,
      filename: imageFileName,
      contentType: MediaType.parse(imageContentType),
    ),
  );

  // Add watermark options
  request.fields.addAll(options.toParams());

  // Send the request
  final streamedResponse = await request.send().timeout(
    ScanProConfig.timeout,
  );
  final response = await http.Response.fromStream(streamedResponse);

  // Parse the response
  try {
    final data = json.decode(response.body);

    if (response.statusCode >= 200 && response.statusCode < 300) {
      return ApiResponse(
        success: true,
        data: data,
        statusCode: response.statusCode,
      );
    } else {
      String errorMessage = 'An error occurred';

      if (data is Map && data.containsKey('error')) {
        errorMessage = data['error'].toString();
      }

      return ApiResponse(
        success: false,
        error: errorMessage,
        statusCode: response.statusCode,
        data: data,
      );
    }
  } catch (e) {
    return ApiResponse(
      success: false,
      error: 'Failed to parse response: ${e.toString()}',
      statusCode: response.statusCode,
      data: response.body,
    );
  }
}