enable stream file writer

Author: wj-Mcat

src/wechaty_puppet/file_box/file_box.py

@@ -68,7 +68,7 @@ def __init__(self, options: FileBoxOptionsBase):
 
         elif isinstance(options, FileBoxOptionsStream):
             # TODO -> need to get into detail for stream sending
-            pass
+            self.stream = options.stream
 
         elif isinstance(options, FileBoxOptionsQrCode):
             self.qrCode = options.qr_code
@@ -192,6 +192,10 @@ async def to_file(self, file_path: Optional[str] = None,
             with open(file_path, 'wb') as f:
                 f.write(data)
 
+        elif file_box_type == FileBoxType.Stream:
+            with open(file_path, 'wb+') as f:
+                f.write(self.stream)
+
     def to_base64(self) -> str:
         """
         transfer file-box to base64 string