validateFile static method

Implementation

static Future<bool> validateFile(
    File? file, Function(String error) onError) async {
  if (file == null) {
    onError('File is null');
    return false;
  }

  final mimeType = lookupMimeType(file.path);
  final fileSize = await file.length();

  if (mimeType != null) {
    if (mimeType.startsWith('audio/')) {
      if (fileSize <= 16 * 1024 * 1024) {
        return true; // Valid audio file
      } else {
        onError("Audio file exceeds the size limit (16 MB)");
      }
    }
    if (Constant.documentFileTypes()
        .any((type) => mimeType.startsWith(type))) {
      if (fileSize <= 20 * 1024 * 1024) {
        return true; // Valid text file
      } else {
        onError("Text file exceeds the size limit (20 MB)");
      }
    } else if (mimeType.startsWith('image/')) {
      if (fileSize <= 5 * 1024 * 1024) {
        return true; // Valid image file
      } else {
        onError("Image file exceeds the size limit (5 MB)");
      }
    } else if (mimeType.startsWith('video/')) {
      if (fileSize <= 16 * 1024 * 1024) {
        return true; // Valid video file
      } else {
        onError("Video file exceeds the size limit (16 MB)");
      }
    } else {
      onError("Unsupported file type: $mimeType");
    }
  } else {
    onError('Failed to determine MIME type for "${file.path}"');
  }

  return false; // File is invalid
}