Added attribute size to attachments googleapis#259

O365/utils/attachment.py

@@ -91,6 +91,7 @@ def __init__(self, attachment=None, *, parent=None, **kwargs):
         self.content = None
         self.on_disk = False
         self.on_cloud = kwargs.get('on_cloud', False)
+        self.size = None
 
         if attachment:
             if isinstance(attachment, dict):
@@ -106,6 +107,7 @@ def __init__(self, attachment=None, *, parent=None, **kwargs):
                     self.attachment_type = 'item' if 'item' in attachment.get(
                         '@odata.type', '').lower() else 'file'
                     self.on_disk = False
+                    self.size = attachment.get(self._cc('size'), None)
                 else:
                     file_path = attachment.get('path', attachment.get('name'))
                     if file_path is None:
@@ -117,6 +119,8 @@ def __init__(self, attachment=None, *, parent=None, **kwargs):
                     self.attachment = Path(file_path) if self.on_disk else None
                     self.name = (self.attachment.name if self.on_disk
                                  else attachment.get('name'))
+                    self.size = self.attachment.stat().st_size if self.attachment else None
+
             elif isinstance(attachment, str):
                 self.attachment = Path(attachment)
                 self.name = self.attachment.name
@@ -135,11 +139,15 @@ def __init__(self, attachment=None, *, parent=None, **kwargs):
                 self.content = attachment.to_api_data()
                 self.content['@odata.type'] = attachment.attachment_type
 
-            if self.content is None and self.attachment and \
-                    self.attachment.exists():
+            if self.content is None and self.attachment and self.attachment.exists():
                 with self.attachment.open('rb') as file:
                     self.content = base64.b64encode(file.read()).decode('utf-8')
                 self.on_disk = True
+                self.size = self.attachment.stat().st_size
+
+    def __len__(self):
+        """ Returns the size of this attachment """
+        return self.size
 
     def to_api_data(self):
         """ Returns a dict to communicate with the server