Add Blob Creation as Path in flutter_file_picker

[vicajilau]

Pull Request: Add Blob Creation as Path in flutter_file_picker

Description

This PR introduces the capability to create a blob from the picked file and set it as the path in the flutter_file_picker plugin. This change allows for better handling of file data directly as URLs, enhancing the flexibility of file management in web applications.

Changes Made

• Blob Creation: Implemented the creation of a blob from the selected file and set it as the path in the PlatformFile object.

∑ Code Snippet

void addPickedFile(
  File file,
  Uint8List? bytes,
  String? path,
  Stream<List<int>>? readStream,
) {
  final blob = Blob([bytes ?? Uint8List(0)]);
  final blobUrl = Url.createObjectUrl(blob); // Create a blob URL

  pickedFiles.add(PlatformFile(
    name: file.name,
    path: blobUrl, // Set the blob URL as the path
    size: bytes != null ? bytes.length : file.size,
    bytes: bytes,
    readStream: readStream,
  ));

  if (pickedFiles.length >= files.length) {
    if (onFileLoading != null) {
      onFileLoading(FilePickerStatus.done);
    }
    filesCompleter.complete(pickedFiles);
  }
}

Benefits

Enhanced File Handling: Allows for seamless integration of file data as URLs, making it easier to work with files in web applications.
Checklist

• I have tested the changes locally.

Related Issues

• [web] path is always null #751
• It currently requires different flows in universal applications. This minimises the gap between platforms.

Additional Notes

Please review the changes and let me know if further modifications are needed. Thank you! 🤗